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-rw-r--r--arch/score/kernel/Makefile11
-rw-r--r--arch/score/kernel/asm-offsets.c216
-rw-r--r--arch/score/kernel/entry.S514
-rw-r--r--arch/score/kernel/head.S70
-rw-r--r--arch/score/kernel/init_task.c46
-rw-r--r--arch/score/kernel/irq.c148
-rw-r--r--arch/score/kernel/module.c165
-rw-r--r--arch/score/kernel/process.c168
-rw-r--r--arch/score/kernel/ptrace.c382
-rw-r--r--arch/score/kernel/setup.c159
-rw-r--r--arch/score/kernel/signal.c361
-rw-r--r--arch/score/kernel/sys_call_table.c12
-rw-r--r--arch/score/kernel/sys_score.c151
-rw-r--r--arch/score/kernel/time.c99
-rw-r--r--arch/score/kernel/traps.c349
-rw-r--r--arch/score/kernel/vmlinux.lds.S89
16 files changed, 2940 insertions, 0 deletions
diff --git a/arch/score/kernel/Makefile b/arch/score/kernel/Makefile
new file mode 100644
index 00000000000..f218673b5d3
--- /dev/null
+++ b/arch/score/kernel/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for the Linux/SCORE kernel.
+#
+
+extra-y := head.o vmlinux.lds
+
+obj-y += entry.o init_task.o irq.o process.o ptrace.o \
+ setup.o signal.o sys_score.o time.o traps.o \
+ sys_call_table.o
+
+obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/score/kernel/asm-offsets.c b/arch/score/kernel/asm-offsets.c
new file mode 100644
index 00000000000..57788f44c6f
--- /dev/null
+++ b/arch/score/kernel/asm-offsets.c
@@ -0,0 +1,216 @@
+/*
+ * arch/score/kernel/asm-offsets.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/kbuild.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+#include <asm-generic/cmpxchg-local.h>
+
+void output_ptreg_defines(void)
+{
+ COMMENT("SCORE pt_regs offsets.");
+ OFFSET(PT_R0, pt_regs, regs[0]);
+ OFFSET(PT_R1, pt_regs, regs[1]);
+ OFFSET(PT_R2, pt_regs, regs[2]);
+ OFFSET(PT_R3, pt_regs, regs[3]);
+ OFFSET(PT_R4, pt_regs, regs[4]);
+ OFFSET(PT_R5, pt_regs, regs[5]);
+ OFFSET(PT_R6, pt_regs, regs[6]);
+ OFFSET(PT_R7, pt_regs, regs[7]);
+ OFFSET(PT_R8, pt_regs, regs[8]);
+ OFFSET(PT_R9, pt_regs, regs[9]);
+ OFFSET(PT_R10, pt_regs, regs[10]);
+ OFFSET(PT_R11, pt_regs, regs[11]);
+ OFFSET(PT_R12, pt_regs, regs[12]);
+ OFFSET(PT_R13, pt_regs, regs[13]);
+ OFFSET(PT_R14, pt_regs, regs[14]);
+ OFFSET(PT_R15, pt_regs, regs[15]);
+ OFFSET(PT_R16, pt_regs, regs[16]);
+ OFFSET(PT_R17, pt_regs, regs[17]);
+ OFFSET(PT_R18, pt_regs, regs[18]);
+ OFFSET(PT_R19, pt_regs, regs[19]);
+ OFFSET(PT_R20, pt_regs, regs[20]);
+ OFFSET(PT_R21, pt_regs, regs[21]);
+ OFFSET(PT_R22, pt_regs, regs[22]);
+ OFFSET(PT_R23, pt_regs, regs[23]);
+ OFFSET(PT_R24, pt_regs, regs[24]);
+ OFFSET(PT_R25, pt_regs, regs[25]);
+ OFFSET(PT_R26, pt_regs, regs[26]);
+ OFFSET(PT_R27, pt_regs, regs[27]);
+ OFFSET(PT_R28, pt_regs, regs[28]);
+ OFFSET(PT_R29, pt_regs, regs[29]);
+ OFFSET(PT_R30, pt_regs, regs[30]);
+ OFFSET(PT_R31, pt_regs, regs[31]);
+
+ OFFSET(PT_ORIG_R4, pt_regs, orig_r4);
+ OFFSET(PT_ORIG_R7, pt_regs, orig_r7);
+ OFFSET(PT_CEL, pt_regs, cel);
+ OFFSET(PT_CEH, pt_regs, ceh);
+ OFFSET(PT_SR0, pt_regs, sr0);
+ OFFSET(PT_SR1, pt_regs, sr1);
+ OFFSET(PT_SR2, pt_regs, sr2);
+ OFFSET(PT_EPC, pt_regs, cp0_epc);
+ OFFSET(PT_EMA, pt_regs, cp0_ema);
+ OFFSET(PT_PSR, pt_regs, cp0_psr);
+ OFFSET(PT_ECR, pt_regs, cp0_ecr);
+ OFFSET(PT_CONDITION, pt_regs, cp0_condition);
+ OFFSET(PT_IS_SYSCALL, pt_regs, is_syscall);
+
+ DEFINE(PT_SIZE, sizeof(struct pt_regs));
+ BLANK();
+}
+
+void output_task_defines(void)
+{
+ COMMENT("SCORE task_struct offsets.");
+ OFFSET(TASK_STATE, task_struct, state);
+ OFFSET(TASK_THREAD_INFO, task_struct, stack);
+ OFFSET(TASK_FLAGS, task_struct, flags);
+ OFFSET(TASK_MM, task_struct, mm);
+ OFFSET(TASK_PID, task_struct, pid);
+ DEFINE(TASK_STRUCT_SIZE, sizeof(struct task_struct));
+ BLANK();
+}
+
+void output_thread_info_defines(void)
+{
+ COMMENT("SCORE thread_info offsets.");
+ OFFSET(TI_TASK, thread_info, task);
+ OFFSET(TI_EXEC_DOMAIN, thread_info, exec_domain);
+ OFFSET(TI_FLAGS, thread_info, flags);
+ OFFSET(TI_TP_VALUE, thread_info, tp_value);
+ OFFSET(TI_CPU, thread_info, cpu);
+ OFFSET(TI_PRE_COUNT, thread_info, preempt_count);
+ OFFSET(TI_ADDR_LIMIT, thread_info, addr_limit);
+ OFFSET(TI_RESTART_BLOCK, thread_info, restart_block);
+ OFFSET(TI_REGS, thread_info, regs);
+ DEFINE(KERNEL_STACK_SIZE, THREAD_SIZE);
+ DEFINE(KERNEL_STACK_MASK, THREAD_MASK);
+ BLANK();
+}
+
+void output_thread_defines(void)
+{
+ COMMENT("SCORE specific thread_struct offsets.");
+ OFFSET(THREAD_REG0, task_struct, thread.reg0);
+ OFFSET(THREAD_REG2, task_struct, thread.reg2);
+ OFFSET(THREAD_REG3, task_struct, thread.reg3);
+ OFFSET(THREAD_REG12, task_struct, thread.reg12);
+ OFFSET(THREAD_REG13, task_struct, thread.reg13);
+ OFFSET(THREAD_REG14, task_struct, thread.reg14);
+ OFFSET(THREAD_REG15, task_struct, thread.reg15);
+ OFFSET(THREAD_REG16, task_struct, thread.reg16);
+ OFFSET(THREAD_REG17, task_struct, thread.reg17);
+ OFFSET(THREAD_REG18, task_struct, thread.reg18);
+ OFFSET(THREAD_REG19, task_struct, thread.reg19);
+ OFFSET(THREAD_REG20, task_struct, thread.reg20);
+ OFFSET(THREAD_REG21, task_struct, thread.reg21);
+ OFFSET(THREAD_REG29, task_struct, thread.reg29);
+
+ OFFSET(THREAD_PSR, task_struct, thread.cp0_psr);
+ OFFSET(THREAD_EMA, task_struct, thread.cp0_ema);
+ OFFSET(THREAD_BADUADDR, task_struct, thread.cp0_baduaddr);
+ OFFSET(THREAD_ECODE, task_struct, thread.error_code);
+ OFFSET(THREAD_TRAPNO, task_struct, thread.trap_no);
+ BLANK();
+}
+
+void output_mm_defines(void)
+{
+ COMMENT("Size of struct page");
+ DEFINE(STRUCT_PAGE_SIZE, sizeof(struct page));
+ BLANK();
+ COMMENT("Linux mm_struct offsets.");
+ OFFSET(MM_USERS, mm_struct, mm_users);
+ OFFSET(MM_PGD, mm_struct, pgd);
+ OFFSET(MM_CONTEXT, mm_struct, context);
+ BLANK();
+ DEFINE(_PAGE_SIZE, PAGE_SIZE);
+ DEFINE(_PAGE_SHIFT, PAGE_SHIFT);
+ BLANK();
+ DEFINE(_PGD_T_SIZE, sizeof(pgd_t));
+ DEFINE(_PTE_T_SIZE, sizeof(pte_t));
+ BLANK();
+ DEFINE(_PGD_ORDER, PGD_ORDER);
+ DEFINE(_PTE_ORDER, PTE_ORDER);
+ BLANK();
+ DEFINE(_PGDIR_SHIFT, PGDIR_SHIFT);
+ BLANK();
+ DEFINE(_PTRS_PER_PGD, PTRS_PER_PGD);
+ DEFINE(_PTRS_PER_PTE, PTRS_PER_PTE);
+ BLANK();
+}
+
+void output_sc_defines(void)
+{
+ COMMENT("Linux sigcontext offsets.");
+ OFFSET(SC_REGS, sigcontext, sc_regs);
+ OFFSET(SC_MDCEH, sigcontext, sc_mdceh);
+ OFFSET(SC_MDCEL, sigcontext, sc_mdcel);
+ OFFSET(SC_PC, sigcontext, sc_pc);
+ OFFSET(SC_PSR, sigcontext, sc_psr);
+ OFFSET(SC_ECR, sigcontext, sc_ecr);
+ OFFSET(SC_EMA, sigcontext, sc_ema);
+ BLANK();
+}
+
+void output_signal_defined(void)
+{
+ COMMENT("Linux signal numbers.");
+ DEFINE(_SIGHUP, SIGHUP);
+ DEFINE(_SIGINT, SIGINT);
+ DEFINE(_SIGQUIT, SIGQUIT);
+ DEFINE(_SIGILL, SIGILL);
+ DEFINE(_SIGTRAP, SIGTRAP);
+ DEFINE(_SIGIOT, SIGIOT);
+ DEFINE(_SIGABRT, SIGABRT);
+ DEFINE(_SIGFPE, SIGFPE);
+ DEFINE(_SIGKILL, SIGKILL);
+ DEFINE(_SIGBUS, SIGBUS);
+ DEFINE(_SIGSEGV, SIGSEGV);
+ DEFINE(_SIGSYS, SIGSYS);
+ DEFINE(_SIGPIPE, SIGPIPE);
+ DEFINE(_SIGALRM, SIGALRM);
+ DEFINE(_SIGTERM, SIGTERM);
+ DEFINE(_SIGUSR1, SIGUSR1);
+ DEFINE(_SIGUSR2, SIGUSR2);
+ DEFINE(_SIGCHLD, SIGCHLD);
+ DEFINE(_SIGPWR, SIGPWR);
+ DEFINE(_SIGWINCH, SIGWINCH);
+ DEFINE(_SIGURG, SIGURG);
+ DEFINE(_SIGIO, SIGIO);
+ DEFINE(_SIGSTOP, SIGSTOP);
+ DEFINE(_SIGTSTP, SIGTSTP);
+ DEFINE(_SIGCONT, SIGCONT);
+ DEFINE(_SIGTTIN, SIGTTIN);
+ DEFINE(_SIGTTOU, SIGTTOU);
+ DEFINE(_SIGVTALRM, SIGVTALRM);
+ DEFINE(_SIGPROF, SIGPROF);
+ DEFINE(_SIGXCPU, SIGXCPU);
+ DEFINE(_SIGXFSZ, SIGXFSZ);
+ BLANK();
+}
diff --git a/arch/score/kernel/entry.S b/arch/score/kernel/entry.S
new file mode 100644
index 00000000000..577abba3fac
--- /dev/null
+++ b/arch/score/kernel/entry.S
@@ -0,0 +1,514 @@
+/*
+ * arch/score/kernel/entry.S
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+
+#include <asm/asmmacro.h>
+#include <asm/thread_info.h>
+#include <asm/unistd.h>
+
+/*
+ * disable interrupts.
+ */
+.macro disable_irq
+ mfcr r8, cr0
+ srli r8, r8, 1
+ slli r8, r8, 1
+ mtcr r8, cr0
+ nop
+ nop
+ nop
+ nop
+ nop
+.endm
+
+/*
+ * enable interrupts.
+ */
+.macro enable_irq
+ mfcr r8, cr0
+ ori r8, 1
+ mtcr r8, cr0
+ nop
+ nop
+ nop
+ nop
+ nop
+.endm
+
+__INIT
+ENTRY(debug_exception_vector)
+ nop!
+ nop!
+ nop!
+ nop!
+ nop!
+ nop!
+ nop!
+ nop!
+
+ENTRY(general_exception_vector) # should move to addr 0x200
+ j general_exception
+ nop!
+ nop!
+ nop!
+ nop!
+ nop!
+ nop!
+
+ENTRY(interrupt_exception_vector) # should move to addr 0x210
+ j interrupt_exception
+ nop!
+ nop!
+ nop!
+ nop!
+ nop!
+ nop!
+
+ .section ".text", "ax"
+ .align 2;
+general_exception:
+ mfcr r31, cr2
+ nop
+ la r30, exception_handlers
+ andi r31, 0x1f # get ecr.exc_code
+ slli r31, r31, 2
+ add r30, r30, r31
+ lw r30, [r30]
+ br r30
+
+interrupt_exception:
+ SAVE_ALL
+ mfcr r4, cr2
+ nop
+ lw r16, [r28, TI_REGS]
+ sw r0, [r28, TI_REGS]
+ la r3, ret_from_irq
+ srli r4, r4, 18 # get ecr.ip[7:2], interrupt No.
+ mv r5, r0
+ j do_IRQ
+
+ENTRY(handle_nmi) # NMI #1
+ SAVE_ALL
+ mv r4, r0
+ la r8, nmi_exception_handler
+ brl r8
+ j restore_all
+
+ENTRY(handle_adelinsn) # AdEL-instruction #2
+ SAVE_ALL
+ mfcr r8, cr6
+ nop
+ nop
+ sw r8, [r0, PT_EMA]
+ mv r4, r0
+ la r8, do_adelinsn
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_ibe) # BusEL-instruction #5
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_be
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_pel) # P-EL #6
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_pel
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_ccu) # CCU #8
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_ccu
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_ri) # RI #9
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_ri
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_tr) # Trap #10
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_tr
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_adedata) # AdES-instruction #12
+ SAVE_ALL
+ mfcr r8, cr6
+ nop
+ nop
+ sw r8, [r0, PT_EMA]
+ mv r4, r0
+ la r8, do_adedata
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_cee) # CeE #16
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_cee
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_cpe) # CpE #17
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_cpe
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_dbe) # BusEL-data #18
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_be
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+ENTRY(handle_reserved) # others
+ SAVE_ALL
+ mv r4, r0
+ la r8, do_reserved
+ brl r8
+ mv r4, r0
+ j ret_from_exception
+ nop
+
+#ifndef CONFIG_PREEMPT
+#define resume_kernel restore_all
+#else
+#define __ret_from_irq ret_from_exception
+#endif
+
+ .align 2
+#ifndef CONFIG_PREEMPT
+ENTRY(ret_from_exception)
+ disable_irq # preempt stop
+ nop
+ j __ret_from_irq
+ nop
+#endif
+
+ENTRY(ret_from_irq)
+ sw r16, [r28, TI_REGS]
+
+ENTRY(__ret_from_irq)
+ lw r8, [r0, PT_PSR] # returning to kernel mode?
+ andri.c r8, r8, KU_USER
+ beq resume_kernel
+
+resume_userspace:
+ disable_irq
+ lw r6, [r28, TI_FLAGS] # current->work
+ li r8, _TIF_WORK_MASK
+ and.c r8, r8, r6 # ignoring syscall_trace
+ bne work_pending
+ nop
+ j restore_all
+ nop
+
+#ifdef CONFIG_PREEMPT
+resume_kernel:
+ disable_irq
+ lw r8, [r28, TI_PRE_COUNT]
+ cmpz.c r8
+ bne r8, restore_all
+need_resched:
+ lw r8, [r28, TI_FLAGS]
+ andri.c r9, r8, _TIF_NEED_RESCHED
+ beq restore_all
+ lw r8, [r28, PT_PSR] # Interrupts off?
+ andri.c r8, r8, 1
+ beq restore_all
+ bl preempt_schedule_irq
+ nop
+ j need_resched
+ nop
+#endif
+
+ENTRY(ret_from_fork)
+ bl schedule_tail # r4=struct task_struct *prev
+
+ENTRY(syscall_exit)
+ nop
+ disable_irq
+ lw r6, [r28, TI_FLAGS] # current->work
+ li r8, _TIF_WORK_MASK
+ and.c r8, r6, r8
+ bne syscall_exit_work
+
+ENTRY(restore_all) # restore full frame
+ RESTORE_ALL_AND_RET
+
+work_pending:
+ andri.c r8, r6, _TIF_NEED_RESCHED # r6 is preloaded with TI_FLAGS
+ beq work_notifysig
+work_resched:
+ bl schedule
+ nop
+ disable_irq
+ lw r6, [r28, TI_FLAGS]
+ li r8, _TIF_WORK_MASK
+ and.c r8, r6, r8 # is there any work to be done
+ # other than syscall tracing?
+ beq restore_all
+ andri.c r8, r6, _TIF_NEED_RESCHED
+ bne work_resched
+
+work_notifysig:
+ mv r4, r0
+ li r5, 0
+ bl do_notify_resume # r6 already loaded
+ nop
+ j resume_userspace
+ nop
+
+ENTRY(syscall_exit_work)
+ li r8, _TIF_SYSCALL_TRACE
+ and.c r8, r8, r6 # r6 is preloaded with TI_FLAGS
+ beq work_pending # trace bit set?
+ nop
+ enable_irq
+ mv r4, r0
+ li r5, 1
+ bl do_syscall_trace
+ nop
+ b resume_userspace
+ nop
+
+.macro save_context reg
+ sw r12, [\reg, THREAD_REG12];
+ sw r13, [\reg, THREAD_REG13];
+ sw r14, [\reg, THREAD_REG14];
+ sw r15, [\reg, THREAD_REG15];
+ sw r16, [\reg, THREAD_REG16];
+ sw r17, [\reg, THREAD_REG17];
+ sw r18, [\reg, THREAD_REG18];
+ sw r19, [\reg, THREAD_REG19];
+ sw r20, [\reg, THREAD_REG20];
+ sw r21, [\reg, THREAD_REG21];
+ sw r29, [\reg, THREAD_REG29];
+ sw r2, [\reg, THREAD_REG2];
+ sw r0, [\reg, THREAD_REG0]
+.endm
+
+.macro restore_context reg
+ lw r12, [\reg, THREAD_REG12];
+ lw r13, [\reg, THREAD_REG13];
+ lw r14, [\reg, THREAD_REG14];
+ lw r15, [\reg, THREAD_REG15];
+ lw r16, [\reg, THREAD_REG16];
+ lw r17, [\reg, THREAD_REG17];
+ lw r18, [\reg, THREAD_REG18];
+ lw r19, [\reg, THREAD_REG19];
+ lw r20, [\reg, THREAD_REG20];
+ lw r21, [\reg, THREAD_REG21];
+ lw r29, [\reg, THREAD_REG29];
+ lw r0, [\reg, THREAD_REG0];
+ lw r2, [\reg, THREAD_REG2];
+ lw r3, [\reg, THREAD_REG3]
+.endm
+
+/*
+ * task_struct *resume(task_struct *prev, task_struct *next,
+ * struct thread_info *next_ti)
+ */
+ENTRY(resume)
+ mfcr r9, cr0
+ nop
+ nop
+ sw r9, [r4, THREAD_PSR]
+ save_context r4
+ sw r3, [r4, THREAD_REG3]
+
+ mv r28, r6
+ restore_context r5
+ mv r8, r6
+ addi r8, KERNEL_STACK_SIZE
+ subi r8, 32
+ la r9, kernelsp;
+ sw r8, [r9];
+
+ mfcr r9, cr0
+ ldis r7, 0x00ff
+ nop
+ and r9, r9, r7
+ lw r6, [r5, THREAD_PSR]
+ not r7, r7
+ and r6, r6, r7
+ or r6, r6, r9
+ mtcr r6, cr0
+ nop; nop; nop; nop; nop
+ br r3
+
+ENTRY(handle_sys)
+ SAVE_ALL
+ sw r8, [r0, 16] # argument 5 from user r8
+ sw r9, [r0, 20] # argument 6 from user r9
+ enable_irq
+
+ sw r4, [r0, PT_ORIG_R4] #for restart syscall
+ sw r7, [r0, PT_ORIG_R7] #for restart syscall
+ sw r27, [r0, PT_IS_SYSCALL] # it from syscall
+
+ lw r9, [r0, PT_EPC] # skip syscall on return
+ addi r9, 4
+ sw r9, [r0, PT_EPC]
+
+ cmpi.c r27, __NR_syscalls # check syscall number
+ bgtu illegal_syscall
+
+ slli r8, r27, 2 # get syscall routine
+ la r11, sys_call_table
+ add r11, r11, r8
+ lw r10, [r11] # get syscall entry
+
+ cmpz.c r10
+ beq illegal_syscall
+
+ lw r8, [r28, TI_FLAGS]
+ li r9, _TIF_SYSCALL_TRACE
+ and.c r8, r8, r9
+ bne syscall_trace_entry
+
+ brl r10 # Do The Real system call
+
+ cmpi.c r4, 0
+ blt 1f
+ ldi r8, 0
+ sw r8, [r0, PT_R7]
+ b 2f
+1:
+ cmpi.c r4, -MAX_ERRNO - 1
+ ble 2f
+ ldi r8, 0x1;
+ sw r8, [r0, PT_R7]
+ neg r4, r4
+2:
+ sw r4, [r0, PT_R4] # save result
+
+syscall_return:
+ disable_irq
+ lw r6, [r28, TI_FLAGS] # current->work
+ li r8, _TIF_WORK_MASK
+ and.c r8, r6, r8
+ bne syscall_return_work
+ j restore_all
+
+syscall_return_work:
+ j syscall_exit_work
+
+syscall_trace_entry:
+ mv r16, r10
+ mv r4, r0
+ li r5, 0
+ bl do_syscall_trace
+
+ mv r8, r16
+ lw r4, [r0, PT_R4] # Restore argument registers
+ lw r5, [r0, PT_R5]
+ lw r6, [r0, PT_R6]
+ lw r7, [r0, PT_R7]
+ brl r8
+
+ li r8, -MAX_ERRNO - 1
+ sw r8, [r0, PT_R7] # set error flag
+
+ neg r4, r4 # error
+ sw r4, [r0, PT_R0] # set flag for syscall
+ # restarting
+1: sw r4, [r0, PT_R2] # result
+ j syscall_exit
+
+illegal_syscall:
+ ldi r4, -ENOSYS # error
+ sw r4, [r0, PT_ORIG_R4]
+ sw r4, [r0, PT_R4]
+ ldi r9, 1 # set error flag
+ sw r9, [r0, PT_R7]
+ j syscall_return
+
+ENTRY(sys_execve)
+ mv r4, r0
+ la r8, score_execve
+ br r8
+
+ENTRY(sys_clone)
+ mv r4, r0
+ la r8, score_clone
+ br r8
+
+ENTRY(sys_rt_sigreturn)
+ mv r4, r0
+ la r8, score_rt_sigreturn
+ br r8
+
+ENTRY(sys_sigaltstack)
+ mv r4, r0
+ la r8, score_sigaltstack
+ br r8
+
+#ifdef __ARCH_WANT_SYSCALL_DEPRECATED
+ENTRY(sys_fork)
+ mv r4, r0
+ la r8, score_fork
+ br r8
+
+ENTRY(sys_vfork)
+ mv r4, r0
+ la r8, score_vfork
+ br r8
+#endif /* __ARCH_WANT_SYSCALL_DEPRECATED */
+
diff --git a/arch/score/kernel/head.S b/arch/score/kernel/head.S
new file mode 100644
index 00000000000..22a7e3c7292
--- /dev/null
+++ b/arch/score/kernel/head.S
@@ -0,0 +1,70 @@
+/*
+ * arch/score/kernel/head.S
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <linux/init.h>
+#include <linux/linkage.h>
+
+#include <asm/asm-offsets.h>
+
+ .extern start_kernel
+ .global init_thread_union
+ .global kernelsp
+
+__INIT
+ENTRY(_stext)
+ la r30, __bss_start /* initialize BSS segment. */
+ la r31, _end
+ xor r8, r8, r8
+
+1: cmp.c r31, r30
+ beq 2f
+
+ sw r8, [r30] /* clean memory. */
+ addi r30, 4
+ b 1b
+
+2: la r28, init_thread_union /* set kernel stack. */
+ mv r0, r28
+ addi r0, KERNEL_STACK_SIZE - 32
+ la r30, kernelsp
+ sw r0, [r30]
+ subi r0, 4*4
+ xor r30, r30, r30
+ ori r30, 0x02 /* enable MMU. */
+ mtcr r30, cr4
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+
+ /* there is no parameter */
+ xor r4, r4, r4
+ xor r5, r5, r5
+ xor r6, r6, r6
+ xor r7, r7, r7
+ la r30, start_kernel /* jump to init_arch */
+ br r30
diff --git a/arch/score/kernel/init_task.c b/arch/score/kernel/init_task.c
new file mode 100644
index 00000000000..baa03ee217d
--- /dev/null
+++ b/arch/score/kernel/init_task.c
@@ -0,0 +1,46 @@
+/*
+ * arch/score/kernel/init_task.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/init_task.h>
+#include <linux/mqueue.h>
+
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+
+/*
+ * Initial thread structure.
+ *
+ * We need to make sure that this is THREAD_SIZE aligned due to the
+ * way process stacks are handled. This is done by having a special
+ * "init_task" linker map entry..
+ */
+union thread_union init_thread_union __init_task_data =
+ { INIT_THREAD_INFO(init_task) };
+
+/*
+ * Initial task structure.
+ *
+ * All other task structs will be allocated on slabs in fork.c
+ */
+struct task_struct init_task = INIT_TASK(init_task);
+EXPORT_SYMBOL(init_task);
diff --git a/arch/score/kernel/irq.c b/arch/score/kernel/irq.c
new file mode 100644
index 00000000000..47647dde09c
--- /dev/null
+++ b/arch/score/kernel/irq.c
@@ -0,0 +1,148 @@
+/*
+ * arch/score/kernel/irq.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/seq_file.h>
+
+#include <asm/io.h>
+
+/* the interrupt controller is hardcoded at this address */
+#define SCORE_PIC ((u32 __iomem __force *)0x95F50000)
+
+#define INT_PNDL 0
+#define INT_PNDH 1
+#define INT_PRIORITY_M 2
+#define INT_PRIORITY_SG0 4
+#define INT_PRIORITY_SG1 5
+#define INT_PRIORITY_SG2 6
+#define INT_PRIORITY_SG3 7
+#define INT_MASKL 8
+#define INT_MASKH 9
+
+/*
+ * handles all normal device IRQs
+ */
+asmlinkage void do_IRQ(int irq)
+{
+ irq_enter();
+ generic_handle_irq(irq);
+ irq_exit();
+}
+
+static void score_mask(unsigned int irq_nr)
+{
+ unsigned int irq_source = 63 - irq_nr;
+
+ if (irq_source < 32)
+ __raw_writel((__raw_readl(SCORE_PIC + INT_MASKL) | \
+ (1 << irq_source)), SCORE_PIC + INT_MASKL);
+ else
+ __raw_writel((__raw_readl(SCORE_PIC + INT_MASKH) | \
+ (1 << (irq_source - 32))), SCORE_PIC + INT_MASKH);
+}
+
+static void score_unmask(unsigned int irq_nr)
+{
+ unsigned int irq_source = 63 - irq_nr;
+
+ if (irq_source < 32)
+ __raw_writel((__raw_readl(SCORE_PIC + INT_MASKL) & \
+ ~(1 << irq_source)), SCORE_PIC + INT_MASKL);
+ else
+ __raw_writel((__raw_readl(SCORE_PIC + INT_MASKH) & \
+ ~(1 << (irq_source - 32))), SCORE_PIC + INT_MASKH);
+}
+
+struct irq_chip score_irq_chip = {
+ .name = "Score7-level",
+ .mask = score_mask,
+ .mask_ack = score_mask,
+ .unmask = score_unmask,
+};
+
+/*
+ * initialise the interrupt system
+ */
+void __init init_IRQ(void)
+{
+ int index;
+ unsigned long target_addr;
+
+ for (index = 0; index < NR_IRQS; ++index)
+ set_irq_chip_and_handler(index, &score_irq_chip,
+ handle_level_irq);
+
+ for (target_addr = IRQ_VECTOR_BASE_ADDR;
+ target_addr <= IRQ_VECTOR_END_ADDR;
+ target_addr += IRQ_VECTOR_SIZE)
+ memcpy((void *)target_addr, \
+ interrupt_exception_vector, IRQ_VECTOR_SIZE);
+
+ __raw_writel(0xffffffff, SCORE_PIC + INT_MASKL);
+ __raw_writel(0xffffffff, SCORE_PIC + INT_MASKH);
+
+ __asm__ __volatile__(
+ "mtcr %0, cr3\n\t"
+ : : "r" (EXCEPTION_VECTOR_BASE_ADDR | \
+ VECTOR_ADDRESS_OFFSET_MODE16));
+}
+
+/*
+ * Generic, controller-independent functions:
+ */
+int show_interrupts(struct seq_file *p, void *v)
+{
+ int i = *(loff_t *)v, cpu;
+ struct irqaction *action;
+ unsigned long flags;
+
+ if (i == 0) {
+ seq_puts(p, " ");
+ for_each_online_cpu(cpu)
+ seq_printf(p, "CPU%d ", cpu);
+ seq_putc(p, '\n');
+ }
+
+ if (i < NR_IRQS) {
+ spin_lock_irqsave(&irq_desc[i].lock, flags);
+ action = irq_desc[i].action;
+ if (!action)
+ goto unlock;
+
+ seq_printf(p, "%3d: ", i);
+ seq_printf(p, "%10u ", kstat_irqs(i));
+ seq_printf(p, " %8s", irq_desc[i].chip->name ? : "-");
+ seq_printf(p, " %s", action->name);
+ for (action = action->next; action; action = action->next)
+ seq_printf(p, ", %s", action->name);
+
+ seq_putc(p, '\n');
+unlock:
+ spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+ }
+
+ return 0;
+}
diff --git a/arch/score/kernel/module.c b/arch/score/kernel/module.c
new file mode 100644
index 00000000000..4de8d47becd
--- /dev/null
+++ b/arch/score/kernel/module.c
@@ -0,0 +1,165 @@
+/*
+ * arch/score/kernel/module.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/moduleloader.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+
+void *module_alloc(unsigned long size)
+{
+ return size ? vmalloc(size) : NULL;
+}
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+ vfree(module_region);
+}
+
+int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
+ char *secstrings, struct module *mod)
+{
+ return 0;
+}
+
+int apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
+ unsigned int symindex, unsigned int relindex,
+ struct module *me)
+{
+ Elf32_Shdr *symsec = sechdrs + symindex;
+ Elf32_Shdr *relsec = sechdrs + relindex;
+ Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
+ Elf32_Rel *rel = (void *)relsec->sh_addr;
+ unsigned int i;
+
+ for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
+ unsigned long loc;
+ Elf32_Sym *sym;
+ s32 r_offset;
+
+ r_offset = ELF32_R_SYM(rel->r_info);
+ if ((r_offset < 0) ||
+ (r_offset > (symsec->sh_size / sizeof(Elf32_Sym)))) {
+ printk(KERN_ERR "%s: bad relocation, section %d reloc %d\n",
+ me->name, relindex, i);
+ return -ENOEXEC;
+ }
+
+ sym = ((Elf32_Sym *)symsec->sh_addr) + r_offset;
+
+ if ((rel->r_offset < 0) ||
+ (rel->r_offset > dstsec->sh_size - sizeof(u32))) {
+ printk(KERN_ERR "%s: out of bounds relocation, "
+ "section %d reloc %d offset %d size %d\n",
+ me->name, relindex, i, rel->r_offset,
+ dstsec->sh_size);
+ return -ENOEXEC;
+ }
+
+ loc = dstsec->sh_addr + rel->r_offset;
+ switch (ELF32_R_TYPE(rel->r_info)) {
+ case R_SCORE_NONE:
+ break;
+ case R_SCORE_ABS32:
+ *(unsigned long *)loc += sym->st_value;
+ break;
+ case R_SCORE_HI16:
+ break;
+ case R_SCORE_LO16: {
+ unsigned long hi16_offset, offset;
+ unsigned long uvalue;
+ unsigned long temp, temp_hi;
+ temp_hi = *((unsigned long *)loc - 1);
+ temp = *(unsigned long *)loc;
+
+ hi16_offset = (((((temp_hi) >> 16) & 0x3) << 15) |
+ ((temp_hi) & 0x7fff)) >> 1;
+ offset = ((temp >> 16 & 0x03) << 15) |
+ ((temp & 0x7fff) >> 1);
+ offset = (hi16_offset << 16) | (offset & 0xffff);
+ uvalue = sym->st_value + offset;
+ hi16_offset = (uvalue >> 16) << 1;
+
+ temp_hi = ((temp_hi) & (~(0x37fff))) |
+ (hi16_offset & 0x7fff) |
+ ((hi16_offset << 1) & 0x30000);
+ *((unsigned long *)loc - 1) = temp_hi;
+
+ offset = (uvalue & 0xffff) << 1;
+ temp = (temp & (~(0x37fff))) | (offset & 0x7fff) |
+ ((offset << 1) & 0x30000);
+ *(unsigned long *)loc = temp;
+ break;
+ }
+ case R_SCORE_24: {
+ unsigned long hi16_offset, offset;
+ unsigned long uvalue;
+ unsigned long temp;
+
+ temp = *(unsigned long *)loc;
+ offset = (temp & 0x03FF7FFE);
+ hi16_offset = (offset & 0xFFFF0000);
+ offset = (hi16_offset | ((offset & 0xFFFF) << 1)) >> 2;
+
+ uvalue = (sym->st_value + offset) >> 1;
+ uvalue = uvalue & 0x00ffffff;
+
+ temp = (temp & 0xfc008001) |
+ ((uvalue << 2) & 0x3ff0000) |
+ ((uvalue & 0x3fff) << 1);
+ *(unsigned long *)loc = temp;
+ break;
+ }
+ default:
+ printk(KERN_ERR "%s: unknown relocation: %u\n",
+ me->name, ELF32_R_TYPE(rel->r_info));
+ return -ENOEXEC;
+ }
+ }
+
+ return 0;
+}
+
+int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
+ unsigned int symindex, unsigned int relsec,
+ struct module *me)
+{
+ return 0;
+}
+
+/* Given an address, look for it in the module exception tables. */
+const struct exception_table_entry *search_module_dbetables(unsigned long addr)
+{
+ return NULL;
+}
+
+/* Put in dbe list if necessary. */
+int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
+ struct module *me)
+{
+ return 0;
+}
+
+void module_arch_cleanup(struct module *mod) {}
diff --git a/arch/score/kernel/process.c b/arch/score/kernel/process.c
new file mode 100644
index 00000000000..25d08030a88
--- /dev/null
+++ b/arch/score/kernel/process.c
@@ -0,0 +1,168 @@
+/*
+ * arch/score/kernel/process.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/elfcore.h>
+#include <linux/pm.h>
+
+void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
+
+/* If or when software machine-restart is implemented, add code here. */
+void machine_restart(char *command) {}
+
+/* If or when software machine-halt is implemented, add code here. */
+void machine_halt(void) {}
+
+/* If or when software machine-power-off is implemented, add code here. */
+void machine_power_off(void) {}
+
+/*
+ * The idle thread. There's no useful work to be
+ * done, so just try to conserve power and have a
+ * low exit latency (ie sit in a loop waiting for
+ * somebody to say that they'd like to reschedule)
+ */
+void __noreturn cpu_idle(void)
+{
+ /* endless idle loop with no priority at all */
+ while (1) {
+ while (!need_resched())
+ barrier();
+
+ preempt_enable_no_resched();
+ schedule();
+ preempt_disable();
+ }
+}
+
+void ret_from_fork(void);
+
+void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
+{
+ unsigned long status;
+
+ /* New thread loses kernel privileges. */
+ status = regs->cp0_psr & ~(KU_MASK);
+ status |= KU_USER;
+ regs->cp0_psr = status;
+ regs->cp0_epc = pc;
+ regs->regs[0] = sp;
+}
+
+void exit_thread(void) {}
+
+/*
+ * When a process does an "exec", machine state like FPU and debug
+ * registers need to be reset. This is a hook function for that.
+ * Currently we don't have any such state to reset, so this is empty.
+ */
+void flush_thread(void) {}
+
+/*
+ * set up the kernel stack and exception frames for a new process
+ */
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+ unsigned long unused,
+ struct task_struct *p, struct pt_regs *regs)
+{
+ struct thread_info *ti = task_thread_info(p);
+ struct pt_regs *childregs = task_pt_regs(p);
+
+ p->set_child_tid = NULL;
+ p->clear_child_tid = NULL;
+
+ *childregs = *regs;
+ childregs->regs[7] = 0; /* Clear error flag */
+ childregs->regs[4] = 0; /* Child gets zero as return value */
+ regs->regs[4] = p->pid;
+
+ if (childregs->cp0_psr & 0x8) { /* test kernel fork or user fork */
+ childregs->regs[0] = usp; /* user fork */
+ } else {
+ childregs->regs[28] = (unsigned long) ti; /* kernel fork */
+ childregs->regs[0] = (unsigned long) childregs;
+ }
+
+ p->thread.reg0 = (unsigned long) childregs;
+ p->thread.reg3 = (unsigned long) ret_from_fork;
+ p->thread.cp0_psr = 0;
+
+ return 0;
+}
+
+/* Fill in the fpu structure for a core dump. */
+int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)
+{
+ return 1;
+}
+
+static void __noreturn
+kernel_thread_helper(void *unused0, int (*fn)(void *),
+ void *arg, void *unused1)
+{
+ do_exit(fn(arg));
+}
+
+/*
+ * Create a kernel thread.
+ */
+long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
+{
+ struct pt_regs regs;
+
+ memset(&regs, 0, sizeof(regs));
+
+ regs.regs[6] = (unsigned long) arg;
+ regs.regs[5] = (unsigned long) fn;
+ regs.cp0_epc = (unsigned long) kernel_thread_helper;
+ regs.cp0_psr = (regs.cp0_psr & ~(0x1|0x4|0x8)) | \
+ ((regs.cp0_psr & 0x3) << 2);
+
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, \
+ 0, &regs, 0, NULL, NULL);
+}
+
+unsigned long thread_saved_pc(struct task_struct *tsk)
+{
+ return task_pt_regs(tsk)->cp0_epc;
+}
+
+unsigned long get_wchan(struct task_struct *task)
+{
+ if (!task || task == current || task->state == TASK_RUNNING)
+ return 0;
+
+ if (!task_stack_page(task))
+ return 0;
+
+ return task_pt_regs(task)->cp0_epc;
+}
+
+unsigned long arch_align_stack(unsigned long sp)
+{
+ return sp;
+}
diff --git a/arch/score/kernel/ptrace.c b/arch/score/kernel/ptrace.c
new file mode 100644
index 00000000000..174c6422b09
--- /dev/null
+++ b/arch/score/kernel/ptrace.c
@@ -0,0 +1,382 @@
+/*
+ * arch/score/kernel/ptrace.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/elf.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/ptrace.h>
+#include <linux/regset.h>
+
+#include <asm/uaccess.h>
+
+/*
+ * retrieve the contents of SCORE userspace general registers
+ */
+static int genregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ const struct pt_regs *regs = task_pt_regs(target);
+ int ret;
+
+ /* skip 9 * sizeof(unsigned long) not use for pt_regs */
+ ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
+ 0, offsetof(struct pt_regs, regs));
+
+ /* r0 - r31, cel, ceh, sr0, sr1, sr2, epc, ema, psr, ecr, condition */
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ regs->regs,
+ offsetof(struct pt_regs, regs),
+ offsetof(struct pt_regs, cp0_condition));
+
+ if (!ret)
+ ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
+
+ return ret;
+}
+
+/*
+ * update the contents of the SCORE userspace general registers
+ */
+static int genregs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ struct pt_regs *regs = task_pt_regs(target);
+ int ret;
+
+ /* skip 9 * sizeof(unsigned long) */
+ ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+ 0, offsetof(struct pt_regs, regs));
+
+ /* r0 - r31, cel, ceh, sr0, sr1, sr2, epc, ema, psr, ecr, condition */
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ regs->regs,
+ offsetof(struct pt_regs, regs),
+ offsetof(struct pt_regs, cp0_condition));
+
+ if (!ret)
+ ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
+
+ return ret;
+}
+
+/*
+ * Define the register sets available on the score7 under Linux
+ */
+enum score7_regset {
+ REGSET_GENERAL,
+};
+
+static const struct user_regset score7_regsets[] = {
+ [REGSET_GENERAL] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(long),
+ .align = sizeof(long),
+ .get = genregs_get,
+ .set = genregs_set,
+ },
+};
+
+static const struct user_regset_view user_score_native_view = {
+ .name = "score7",
+ .e_machine = EM_SCORE7,
+ .regsets = score7_regsets,
+ .n = ARRAY_SIZE(score7_regsets),
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+ return &user_score_native_view;
+}
+
+static int is_16bitinsn(unsigned long insn)
+{
+ if ((insn & INSN32_MASK) == INSN32_MASK)
+ return 0;
+ else
+ return 1;
+}
+
+int
+read_tsk_long(struct task_struct *child,
+ unsigned long addr, unsigned long *res)
+{
+ int copied;
+
+ copied = access_process_vm(child, addr, res, sizeof(*res), 0);
+
+ return copied != sizeof(*res) ? -EIO : 0;
+}
+
+int
+read_tsk_short(struct task_struct *child,
+ unsigned long addr, unsigned short *res)
+{
+ int copied;
+
+ copied = access_process_vm(child, addr, res, sizeof(*res), 0);
+
+ return copied != sizeof(*res) ? -EIO : 0;
+}
+
+static int
+write_tsk_short(struct task_struct *child,
+ unsigned long addr, unsigned short val)
+{
+ int copied;
+
+ copied = access_process_vm(child, addr, &val, sizeof(val), 1);
+
+ return copied != sizeof(val) ? -EIO : 0;
+}
+
+static int
+write_tsk_long(struct task_struct *child,
+ unsigned long addr, unsigned long val)
+{
+ int copied;
+
+ copied = access_process_vm(child, addr, &val, sizeof(val), 1);
+
+ return copied != sizeof(val) ? -EIO : 0;
+}
+
+void user_enable_single_step(struct task_struct *child)
+{
+ /* far_epc is the target of branch */
+ unsigned int epc, far_epc = 0;
+ unsigned long epc_insn, far_epc_insn;
+ int ninsn_type; /* next insn type 0=16b, 1=32b */
+ unsigned int tmp, tmp2;
+ struct pt_regs *regs = task_pt_regs(child);
+ child->thread.single_step = 1;
+ child->thread.ss_nextcnt = 1;
+ epc = regs->cp0_epc;
+
+ read_tsk_long(child, epc, &epc_insn);
+
+ if (is_16bitinsn(epc_insn)) {
+ if ((epc_insn & J16M) == J16) {
+ tmp = epc_insn & 0xFFE;
+ epc = (epc & 0xFFFFF000) | tmp;
+ } else if ((epc_insn & B16M) == B16) {
+ child->thread.ss_nextcnt = 2;
+ tmp = (epc_insn & 0xFF) << 1;
+ tmp = tmp << 23;
+ tmp = (unsigned int)((int) tmp >> 23);
+ far_epc = epc + tmp;
+ epc += 2;
+ } else if ((epc_insn & BR16M) == BR16) {
+ child->thread.ss_nextcnt = 2;
+ tmp = (epc_insn >> 4) & 0xF;
+ far_epc = regs->regs[tmp];
+ epc += 2;
+ } else
+ epc += 2;
+ } else {
+ if ((epc_insn & J32M) == J32) {
+ tmp = epc_insn & 0x03FFFFFE;
+ tmp2 = tmp & 0x7FFF;
+ tmp = (((tmp >> 16) & 0x3FF) << 15) | tmp2;
+ epc = (epc & 0xFFC00000) | tmp;
+ } else if ((epc_insn & B32M) == B32) {
+ child->thread.ss_nextcnt = 2;
+ tmp = epc_insn & 0x03FFFFFE; /* discard LK bit */
+ tmp2 = tmp & 0x3FF;
+ tmp = (((tmp >> 16) & 0x3FF) << 10) | tmp2; /* 20bit */
+ tmp = tmp << 12;
+ tmp = (unsigned int)((int) tmp >> 12);
+ far_epc = epc + tmp;
+ epc += 4;
+ } else if ((epc_insn & BR32M) == BR32) {
+ child->thread.ss_nextcnt = 2;
+ tmp = (epc_insn >> 16) & 0x1F;
+ far_epc = regs->regs[tmp];
+ epc += 4;
+ } else
+ epc += 4;
+ }
+
+ if (child->thread.ss_nextcnt == 1) {
+ read_tsk_long(child, epc, &epc_insn);
+
+ if (is_16bitinsn(epc_insn)) {
+ write_tsk_short(child, epc, SINGLESTEP16_INSN);
+ ninsn_type = 0;
+ } else {
+ write_tsk_long(child, epc, SINGLESTEP32_INSN);
+ ninsn_type = 1;
+ }
+
+ if (ninsn_type == 0) { /* 16bits */
+ child->thread.insn1_type = 0;
+ child->thread.addr1 = epc;
+ /* the insn may have 32bit data */
+ child->thread.insn1 = (short)epc_insn;
+ } else {
+ child->thread.insn1_type = 1;
+ child->thread.addr1 = epc;
+ child->thread.insn1 = epc_insn;
+ }
+ } else {
+ /* branch! have two target child->thread.ss_nextcnt=2 */
+ read_tsk_long(child, epc, &epc_insn);
+ read_tsk_long(child, far_epc, &far_epc_insn);
+ if (is_16bitinsn(epc_insn)) {
+ write_tsk_short(child, epc, SINGLESTEP16_INSN);
+ ninsn_type = 0;
+ } else {
+ write_tsk_long(child, epc, SINGLESTEP32_INSN);
+ ninsn_type = 1;
+ }
+
+ if (ninsn_type == 0) { /* 16bits */
+ child->thread.insn1_type = 0;
+ child->thread.addr1 = epc;
+ /* the insn may have 32bit data */
+ child->thread.insn1 = (short)epc_insn;
+ } else {
+ child->thread.insn1_type = 1;
+ child->thread.addr1 = epc;
+ child->thread.insn1 = epc_insn;
+ }
+
+ if (is_16bitinsn(far_epc_insn)) {
+ write_tsk_short(child, far_epc, SINGLESTEP16_INSN);
+ ninsn_type = 0;
+ } else {
+ write_tsk_long(child, far_epc, SINGLESTEP32_INSN);
+ ninsn_type = 1;
+ }
+
+ if (ninsn_type == 0) { /* 16bits */
+ child->thread.insn2_type = 0;
+ child->thread.addr2 = far_epc;
+ /* the insn may have 32bit data */
+ child->thread.insn2 = (short)far_epc_insn;
+ } else {
+ child->thread.insn2_type = 1;
+ child->thread.addr2 = far_epc;
+ child->thread.insn2 = far_epc_insn;
+ }
+ }
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+ if (child->thread.insn1_type == 0)
+ write_tsk_short(child, child->thread.addr1,
+ child->thread.insn1);
+
+ if (child->thread.insn1_type == 1)
+ write_tsk_long(child, child->thread.addr1,
+ child->thread.insn1);
+
+ if (child->thread.ss_nextcnt == 2) { /* branch */
+ if (child->thread.insn1_type == 0)
+ write_tsk_short(child, child->thread.addr1,
+ child->thread.insn1);
+ if (child->thread.insn1_type == 1)
+ write_tsk_long(child, child->thread.addr1,
+ child->thread.insn1);
+ if (child->thread.insn2_type == 0)
+ write_tsk_short(child, child->thread.addr2,
+ child->thread.insn2);
+ if (child->thread.insn2_type == 1)
+ write_tsk_long(child, child->thread.addr2,
+ child->thread.insn2);
+ }
+
+ child->thread.single_step = 0;
+ child->thread.ss_nextcnt = 0;
+}
+
+void ptrace_disable(struct task_struct *child)
+{
+ user_disable_single_step(child);
+}
+
+long
+arch_ptrace(struct task_struct *child, long request, long addr, long data)
+{
+ int ret;
+ unsigned long __user *datap = (void __user *)data;
+
+ switch (request) {
+ case PTRACE_GETREGS:
+ ret = copy_regset_to_user(child, &user_score_native_view,
+ REGSET_GENERAL,
+ 0, sizeof(struct pt_regs),
+ (void __user *)datap);
+ break;
+
+ case PTRACE_SETREGS:
+ ret = copy_regset_from_user(child, &user_score_native_view,
+ REGSET_GENERAL,
+ 0, sizeof(struct pt_regs),
+ (const void __user *)datap);
+ break;
+
+ default:
+ ret = ptrace_request(child, request, addr, data);
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * Notification of system call entry/exit
+ * - triggered by current->work.syscall_trace
+ */
+asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit)
+{
+ if (!(current->ptrace & PT_PTRACED))
+ return;
+
+ if (!test_thread_flag(TIF_SYSCALL_TRACE))
+ return;
+
+ /* The 0x80 provides a way for the tracing parent to distinguish
+ between a syscall stop and SIGTRAP delivery. */
+ ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) ?
+ 0x80 : 0));
+
+ /*
+ * this isn't the same as continuing with a signal, but it will do
+ * for normal use. strace only continues with a signal if the
+ * stopping signal is not SIGTRAP. -brl
+ */
+ if (current->exit_code) {
+ send_sig(current->exit_code, current, 1);
+ current->exit_code = 0;
+ }
+}
diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
new file mode 100644
index 00000000000..6a2503c75c4
--- /dev/null
+++ b/arch/score/kernel/setup.c
@@ -0,0 +1,159 @@
+/*
+ * arch/score/kernel/setup.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/bootmem.h>
+#include <linux/initrd.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/screen_info.h>
+
+#include <asm-generic/sections.h>
+#include <asm/setup.h>
+
+struct screen_info screen_info;
+unsigned long kernelsp;
+
+static char command_line[COMMAND_LINE_SIZE];
+static struct resource code_resource = { .name = "Kernel code",};
+static struct resource data_resource = { .name = "Kernel data",};
+
+static void __init bootmem_init(void)
+{
+ unsigned long start_pfn, bootmap_size;
+ unsigned long size = initrd_end - initrd_start;
+
+ start_pfn = PFN_UP(__pa(&_end));
+
+ min_low_pfn = PFN_UP(MEMORY_START);
+ max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
+
+ /* Initialize the boot-time allocator with low memory only. */
+ bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
+ min_low_pfn, max_low_pfn);
+ add_active_range(0, min_low_pfn, max_low_pfn);
+
+ free_bootmem(PFN_PHYS(start_pfn),
+ (max_low_pfn - start_pfn) << PAGE_SHIFT);
+ memory_present(0, start_pfn, max_low_pfn);
+
+ /* Reserve space for the bootmem bitmap. */
+ reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT);
+
+ if (size == 0) {
+ printk(KERN_INFO "Initrd not found or empty");
+ goto disable;
+ }
+
+ if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
+ printk(KERN_ERR "Initrd extends beyond end of memory");
+ goto disable;
+ }
+
+ /* Reserve space for the initrd bitmap. */
+ reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
+ initrd_below_start_ok = 1;
+
+ pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
+ initrd_start, size);
+ return;
+disable:
+ printk(KERN_CONT " - disabling initrd\n");
+ initrd_start = 0;
+ initrd_end = 0;
+}
+
+static void __init resource_init(void)
+{
+ struct resource *res;
+
+ code_resource.start = __pa(&_text);
+ code_resource.end = __pa(&_etext) - 1;
+ data_resource.start = __pa(&_etext);
+ data_resource.end = __pa(&_edata) - 1;
+
+ res = alloc_bootmem(sizeof(struct resource));
+ res->name = "System RAM";
+ res->start = MEMORY_START;
+ res->end = MEMORY_START + MEMORY_SIZE - 1;
+ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+ request_resource(&iomem_resource, res);
+
+ request_resource(res, &code_resource);
+ request_resource(res, &data_resource);
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+ randomize_va_space = 0;
+ *cmdline_p = command_line;
+
+ cpu_cache_init();
+ tlb_init();
+ bootmem_init();
+ paging_init();
+ resource_init();
+}
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+ unsigned long n = (unsigned long) v - 1;
+
+ seq_printf(m, "processor\t\t: %ld\n", n);
+ seq_printf(m, "\n");
+
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ unsigned long i = *pos;
+
+ return i < 1 ? (void *) (i + 1) : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ return c_start(m, pos);
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+const struct seq_operations cpuinfo_op = {
+ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = show_cpuinfo,
+};
+
+static int __init topology_init(void)
+{
+ return 0;
+}
+
+subsys_initcall(topology_init);
diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
new file mode 100644
index 00000000000..aa57440e497
--- /dev/null
+++ b/arch/score/kernel/signal.c
@@ -0,0 +1,361 @@
+/*
+ * arch/score/kernel/signal.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/uaccess.h>
+
+#include <asm/cacheflush.h>
+#include <asm/syscalls.h>
+#include <asm/ucontext.h>
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+struct rt_sigframe {
+ u32 rs_ass[4]; /* argument save space */
+ u32 rs_code[2]; /* signal trampoline */
+ struct siginfo rs_info;
+ struct ucontext rs_uc;
+};
+
+static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
+{
+ int err = 0;
+ unsigned long reg;
+
+ reg = regs->cp0_epc; err |= __put_user(reg, &sc->sc_pc);
+ err |= __put_user(regs->cp0_psr, &sc->sc_psr);
+ err |= __put_user(regs->cp0_condition, &sc->sc_condition);
+
+
+#define save_gp_reg(i) { \
+ reg = regs->regs[i]; \
+ err |= __put_user(reg, &sc->sc_regs[i]); \
+} while (0)
+ save_gp_reg(0); save_gp_reg(1); save_gp_reg(2);
+ save_gp_reg(3); save_gp_reg(4); save_gp_reg(5);
+ save_gp_reg(6); save_gp_reg(7); save_gp_reg(8);
+ save_gp_reg(9); save_gp_reg(10); save_gp_reg(11);
+ save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
+ save_gp_reg(15); save_gp_reg(16); save_gp_reg(17);
+ save_gp_reg(18); save_gp_reg(19); save_gp_reg(20);
+ save_gp_reg(21); save_gp_reg(22); save_gp_reg(23);
+ save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
+ save_gp_reg(27); save_gp_reg(28); save_gp_reg(29);
+#undef save_gp_reg
+
+ reg = regs->ceh; err |= __put_user(reg, &sc->sc_mdceh);
+ reg = regs->cel; err |= __put_user(reg, &sc->sc_mdcel);
+ err |= __put_user(regs->cp0_ecr, &sc->sc_ecr);
+ err |= __put_user(regs->cp0_ema, &sc->sc_ema);
+
+ return err;
+}
+
+static int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
+{
+ int err = 0;
+ u32 reg;
+
+ err |= __get_user(regs->cp0_epc, &sc->sc_pc);
+ err |= __get_user(regs->cp0_condition, &sc->sc_condition);
+
+ err |= __get_user(reg, &sc->sc_mdceh);
+ regs->ceh = (int) reg;
+ err |= __get_user(reg, &sc->sc_mdcel);
+ regs->cel = (int) reg;
+
+ err |= __get_user(reg, &sc->sc_psr);
+ regs->cp0_psr = (int) reg;
+ err |= __get_user(reg, &sc->sc_ecr);
+ regs->cp0_ecr = (int) reg;
+ err |= __get_user(reg, &sc->sc_ema);
+ regs->cp0_ema = (int) reg;
+
+#define restore_gp_reg(i) do { \
+ err |= __get_user(reg, &sc->sc_regs[i]); \
+ regs->regs[i] = reg; \
+} while (0)
+ restore_gp_reg(0); restore_gp_reg(1); restore_gp_reg(2);
+ restore_gp_reg(3); restore_gp_reg(4); restore_gp_reg(5);
+ restore_gp_reg(6); restore_gp_reg(7); restore_gp_reg(8);
+ restore_gp_reg(9); restore_gp_reg(10); restore_gp_reg(11);
+ restore_gp_reg(12); restore_gp_reg(13); restore_gp_reg(14);
+ restore_gp_reg(15); restore_gp_reg(16); restore_gp_reg(17);
+ restore_gp_reg(18); restore_gp_reg(19); restore_gp_reg(20);
+ restore_gp_reg(21); restore_gp_reg(22); restore_gp_reg(23);
+ restore_gp_reg(24); restore_gp_reg(25); restore_gp_reg(26);
+ restore_gp_reg(27); restore_gp_reg(28); restore_gp_reg(29);
+#undef restore_gp_reg
+
+ return err;
+}
+
+/*
+ * Determine which stack to use..
+ */
+static void __user *get_sigframe(struct k_sigaction *ka,
+ struct pt_regs *regs, size_t frame_size)
+{
+ unsigned long sp;
+
+ /* Default to using normal stack */
+ sp = regs->regs[0];
+ sp -= 32;
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if ((ka->sa.sa_flags & SA_ONSTACK) && (!on_sig_stack(sp)))
+ sp = current->sas_ss_sp + current->sas_ss_size;
+
+ return (void __user*)((sp - frame_size) & ~7);
+}
+
+asmlinkage long
+score_sigaltstack(struct pt_regs *regs)
+{
+ const stack_t __user *uss = (const stack_t __user *) regs->regs[4];
+ stack_t __user *uoss = (stack_t __user *) regs->regs[5];
+ unsigned long usp = regs->regs[0];
+
+ return do_sigaltstack(uss, uoss, usp);
+}
+
+asmlinkage long
+score_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ sigset_t set;
+ stack_t st;
+ int sig;
+
+ frame = (struct rt_sigframe __user *) regs->regs[0];
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ sig = restore_sigcontext(regs, &frame->rs_uc.uc_mcontext);
+ if (sig < 0)
+ goto badframe;
+ else if (sig)
+ force_sig(sig, current);
+
+ if (__copy_from_user(&st, &frame->rs_uc.uc_stack, sizeof(st)))
+ goto badframe;
+
+ /* It is more difficult to avoid calling this function than to
+ call it and ignore errors. */
+ do_sigaltstack((stack_t __user *)&st, NULL, regs->regs[0]);
+
+ __asm__ __volatile__(
+ "mv\tr0, %0\n\t"
+ "la\tr8, syscall_exit\n\t"
+ "br\tr8\n\t"
+ : : "r" (regs) : "r8");
+
+badframe:
+ force_sig(SIGSEGV, current);
+
+ return 0;
+}
+
+static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
+ int signr, sigset_t *set, siginfo_t *info)
+{
+ struct rt_sigframe __user *frame;
+ int err = 0;
+
+ frame = get_sigframe(ka, regs, sizeof(*frame));
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ goto give_sigsegv;
+
+ /*
+ * Set up the return code ...
+ *
+ * li v0, __NR_rt_sigreturn
+ * syscall
+ */
+ err |= __put_user(0x87788000 + __NR_rt_sigreturn*2,
+ frame->rs_code + 0);
+ err |= __put_user(0x80008002, frame->rs_code + 1);
+ flush_cache_sigtramp((unsigned long) frame->rs_code);
+
+ err |= copy_siginfo_to_user(&frame->rs_info, info);
+ err |= __put_user(0, &frame->rs_uc.uc_flags);
+ err |= __put_user(NULL, &frame->rs_uc.uc_link);
+ err |= __put_user((void __user *)current->sas_ss_sp,
+ &frame->rs_uc.uc_stack.ss_sp);
+ err |= __put_user(sas_ss_flags(regs->regs[0]),
+ &frame->rs_uc.uc_stack.ss_flags);
+ err |= __put_user(current->sas_ss_size,
+ &frame->rs_uc.uc_stack.ss_size);
+ err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
+ err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
+
+ if (err)
+ goto give_sigsegv;
+
+ regs->regs[0] = (unsigned long) frame;
+ regs->regs[3] = (unsigned long) frame->rs_code;
+ regs->regs[4] = signr;
+ regs->regs[5] = (unsigned long) &frame->rs_info;
+ regs->regs[6] = (unsigned long) &frame->rs_uc;
+ regs->regs[29] = (unsigned long) ka->sa.sa_handler;
+ regs->cp0_epc = (unsigned long) ka->sa.sa_handler;
+
+ return 0;
+
+give_sigsegv:
+ if (signr == SIGSEGV)
+ ka->sa.sa_handler = SIG_DFL;
+ force_sig(SIGSEGV, current);
+ return -EFAULT;
+}
+
+static int handle_signal(unsigned long sig, siginfo_t *info,
+ struct k_sigaction *ka, sigset_t *oldset, struct pt_regs *regs)
+{
+ int ret;
+
+ if (regs->is_syscall) {
+ switch (regs->regs[4]) {
+ case ERESTART_RESTARTBLOCK:
+ case ERESTARTNOHAND:
+ regs->regs[4] = EINTR;
+ break;
+ case ERESTARTSYS:
+ if (!(ka->sa.sa_flags & SA_RESTART)) {
+ regs->regs[4] = EINTR;
+ break;
+ }
+ case ERESTARTNOINTR:
+ regs->regs[4] = regs->orig_r4;
+ regs->regs[7] = regs->orig_r7;
+ regs->cp0_epc -= 8;
+ }
+
+ regs->is_syscall = 0;
+ }
+
+ /*
+ * Set up the stack frame
+ */
+ ret = setup_rt_frame(ka, regs, sig, oldset, info);
+
+ spin_lock_irq(&current->sighand->siglock);
+ sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
+ sigaddset(&current->blocked, sig);
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ return ret;
+}
+
+static void do_signal(struct pt_regs *regs)
+{
+ struct k_sigaction ka;
+ sigset_t *oldset;
+ siginfo_t info;
+ int signr;
+
+ /*
+ * We want the common case to go fast, which is why we may in certain
+ * cases get here from kernel mode. Just return without doing anything
+ * if so.
+ */
+ if (!user_mode(regs))
+ return;
+
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else
+ oldset = &current->blocked;
+
+ signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ if (signr > 0) {
+ /* Actually deliver the signal. */
+ if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
+ /*
+ * A signal was successfully delivered; the saved
+ * sigmask will have been stored in the signal frame,
+ * and will be restored by sigreturn, so we can simply
+ * clear the TIF_RESTORE_SIGMASK flag.
+ */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ }
+
+ return;
+ }
+
+ if (regs->is_syscall) {
+ if (regs->regs[4] == ERESTARTNOHAND ||
+ regs->regs[4] == ERESTARTSYS ||
+ regs->regs[4] == ERESTARTNOINTR) {
+ regs->regs[4] = regs->orig_r4;
+ regs->regs[7] = regs->orig_r7;
+ regs->cp0_epc -= 8;
+ }
+
+ if (regs->regs[4] == ERESTART_RESTARTBLOCK) {
+ regs->regs[27] = __NR_restart_syscall;
+ regs->regs[4] = regs->orig_r4;
+ regs->regs[7] = regs->orig_r7;
+ regs->cp0_epc -= 8;
+ }
+
+ regs->is_syscall = 0; /* Don't deal with this again. */
+ }
+
+ /*
+ * If there's no signal to deliver, we just put the saved sigmask
+ * back
+ */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+ }
+}
+
+/*
+ * notification of userspace execution resumption
+ * - triggered by the TIF_WORK_MASK flags
+ */
+asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused,
+ __u32 thread_info_flags)
+{
+ /* deal with pending signal delivery */
+ if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+ do_signal(regs);
+}
diff --git a/arch/score/kernel/sys_call_table.c b/arch/score/kernel/sys_call_table.c
new file mode 100644
index 00000000000..287369b88c4
--- /dev/null
+++ b/arch/score/kernel/sys_call_table.c
@@ -0,0 +1,12 @@
+#include <linux/syscalls.h>
+#include <linux/signal.h>
+#include <linux/unistd.h>
+
+#include <asm/syscalls.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+void *sys_call_table[__NR_syscalls] = {
+#include <asm/unistd.h>
+};
diff --git a/arch/score/kernel/sys_score.c b/arch/score/kernel/sys_score.c
new file mode 100644
index 00000000000..00124946986
--- /dev/null
+++ b/arch/score/kernel/sys_score.c
@@ -0,0 +1,151 @@
+/*
+ * arch/score/kernel/syscall.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/module.h>
+#include <linux/unistd.h>
+#include <linux/syscalls.h>
+#include <asm/syscalls.h>
+
+asmlinkage long
+sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
+ unsigned long flags, unsigned long fd, unsigned long pgoff)
+{
+ int error = -EBADF;
+ struct file *file = NULL;
+
+ if (pgoff & (~PAGE_MASK >> 12))
+ return -EINVAL;
+
+ flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+ if (!(flags & MAP_ANONYMOUS)) {
+ file = fget(fd);
+ if (!file)
+ return error;
+ }
+
+ down_write(&current->mm->mmap_sem);
+ error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+ up_write(&current->mm->mmap_sem);
+
+ if (file)
+ fput(file);
+
+ return error;
+}
+
+asmlinkage long
+sys_mmap(unsigned long addr, unsigned long len, unsigned long prot,
+ unsigned long flags, unsigned long fd, off_t pgoff)
+{
+ return sys_mmap2(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
+}
+
+asmlinkage long
+score_fork(struct pt_regs *regs)
+{
+ return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL);
+}
+
+/*
+ * Clone a task - this clones the calling program thread.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage long
+score_clone(struct pt_regs *regs)
+{
+ unsigned long clone_flags;
+ unsigned long newsp;
+ int __user *parent_tidptr, *child_tidptr;
+
+ clone_flags = regs->regs[4];
+ newsp = regs->regs[5];
+ if (!newsp)
+ newsp = regs->regs[0];
+ parent_tidptr = (int __user *)regs->regs[6];
+ child_tidptr = (int __user *)regs->regs[8];
+
+ return do_fork(clone_flags, newsp, regs, 0,
+ parent_tidptr, child_tidptr);
+}
+
+asmlinkage long
+score_vfork(struct pt_regs *regs)
+{
+ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
+ regs->regs[0], regs, 0, NULL, NULL);
+}
+
+/*
+ * sys_execve() executes a new program.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage long
+score_execve(struct pt_regs *regs)
+{
+ int error;
+ char *filename;
+
+ filename = getname((char __user*)regs->regs[4]);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ return error;
+
+ error = do_execve(filename, (char __user *__user*)regs->regs[5],
+ (char __user *__user *) regs->regs[6], regs);
+
+ putname(filename);
+ return error;
+}
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+ register unsigned long __r4 asm("r4") = (unsigned long) filename;
+ register unsigned long __r5 asm("r5") = (unsigned long) argv;
+ register unsigned long __r6 asm("r6") = (unsigned long) envp;
+ register unsigned long __r7 asm("r7");
+
+ __asm__ __volatile__ (" \n"
+ "ldi r27, %5 \n"
+ "syscall \n"
+ "mv %0, r4 \n"
+ "mv %1, r7 \n"
+ : "=&r" (__r4), "=r" (__r7)
+ : "r" (__r4), "r" (__r5), "r" (__r6), "i" (__NR_execve)
+ : "r8", "r9", "r10", "r11", "r22", "r23", "r24", "r25",
+ "r26", "r27", "memory");
+
+ if (__r7 == 0)
+ return __r4;
+
+ return -__r4;
+}
diff --git a/arch/score/kernel/time.c b/arch/score/kernel/time.c
new file mode 100644
index 00000000000..f0a43affb20
--- /dev/null
+++ b/arch/score/kernel/time.c
@@ -0,0 +1,99 @@
+/*
+ * arch/score/kernel/time.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+
+#include <asm/scoreregs.h>
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evdev = dev_id;
+
+ /* clear timer interrupt flag */
+ outl(1, P_TIMER0_CPP_REG);
+ evdev->event_handler(evdev);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction timer_irq = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+ .name = "timer",
+};
+
+static int score_timer_set_next_event(unsigned long delta,
+ struct clock_event_device *evdev)
+{
+ outl((TMR_M_PERIODIC | TMR_IE_ENABLE), P_TIMER0_CTRL);
+ outl(delta, P_TIMER0_PRELOAD);
+ outl(inl(P_TIMER0_CTRL) | TMR_ENABLE, P_TIMER0_CTRL);
+
+ return 0;
+}
+
+static void score_timer_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evdev)
+{
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ outl((TMR_M_PERIODIC | TMR_IE_ENABLE), P_TIMER0_CTRL);
+ outl(SYSTEM_CLOCK/HZ, P_TIMER0_PRELOAD);
+ outl(inl(P_TIMER0_CTRL) | TMR_ENABLE, P_TIMER0_CTRL);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ case CLOCK_EVT_MODE_RESUME:
+ case CLOCK_EVT_MODE_UNUSED:
+ break;
+ default:
+ BUG();
+ }
+}
+
+static struct clock_event_device score_clockevent = {
+ .name = "score_clockevent",
+ .features = CLOCK_EVT_FEAT_PERIODIC,
+ .shift = 16,
+ .set_next_event = score_timer_set_next_event,
+ .set_mode = score_timer_set_mode,
+};
+
+void __init time_init(void)
+{
+ timer_irq.dev_id = &score_clockevent;
+ setup_irq(IRQ_TIMER , &timer_irq);
+
+ /* setup COMPARE clockevent */
+ score_clockevent.mult = div_sc(SYSTEM_CLOCK, NSEC_PER_SEC,
+ score_clockevent.shift);
+ score_clockevent.max_delta_ns = clockevent_delta2ns((u32)~0,
+ &score_clockevent);
+ score_clockevent.min_delta_ns = clockevent_delta2ns(50,
+ &score_clockevent) + 1;
+ score_clockevent.cpumask = cpumask_of(0);
+ clockevents_register_device(&score_clockevent);
+}
diff --git a/arch/score/kernel/traps.c b/arch/score/kernel/traps.c
new file mode 100644
index 00000000000..0e46fb19a84
--- /dev/null
+++ b/arch/score/kernel/traps.c
@@ -0,0 +1,349 @@
+/*
+ * arch/score/kernel/traps.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+
+#include <asm/cacheflush.h>
+#include <asm/irq.h>
+#include <asm/irq_regs.h>
+
+unsigned long exception_handlers[32];
+
+/*
+ * The architecture-independent show_stack generator
+ */
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+ int i;
+ long stackdata;
+
+ sp = sp ? sp : (unsigned long *)&sp;
+
+ printk(KERN_NOTICE "Stack: ");
+ i = 1;
+ while ((long) sp & (PAGE_SIZE - 1)) {
+ if (i && ((i % 8) == 0))
+ printk(KERN_NOTICE "\n");
+ if (i > 40) {
+ printk(KERN_NOTICE " ...");
+ break;
+ }
+
+ if (__get_user(stackdata, sp++)) {
+ printk(KERN_NOTICE " (Bad stack address)");
+ break;
+ }
+
+ printk(KERN_NOTICE " %08lx", stackdata);
+ i++;
+ }
+ printk(KERN_NOTICE "\n");
+}
+
+static void show_trace(long *sp)
+{
+ int i;
+ long addr;
+
+ sp = sp ? sp : (long *) &sp;
+
+ printk(KERN_NOTICE "Call Trace: ");
+ i = 1;
+ while ((long) sp & (PAGE_SIZE - 1)) {
+ if (__get_user(addr, sp++)) {
+ if (i && ((i % 6) == 0))
+ printk(KERN_NOTICE "\n");
+ printk(KERN_NOTICE " (Bad stack address)\n");
+ break;
+ }
+
+ if (kernel_text_address(addr)) {
+ if (i && ((i % 6) == 0))
+ printk(KERN_NOTICE "\n");
+ if (i > 40) {
+ printk(KERN_NOTICE " ...");
+ break;
+ }
+
+ printk(KERN_NOTICE " [<%08lx>]", addr);
+ i++;
+ }
+ }
+ printk(KERN_NOTICE "\n");
+}
+
+static void show_code(unsigned int *pc)
+{
+ long i;
+
+ printk(KERN_NOTICE "\nCode:");
+
+ for (i = -3; i < 6; i++) {
+ unsigned long insn;
+ if (__get_user(insn, pc + i)) {
+ printk(KERN_NOTICE " (Bad address in epc)\n");
+ break;
+ }
+ printk(KERN_NOTICE "%c%08lx%c", (i ? ' ' : '<'),
+ insn, (i ? ' ' : '>'));
+ }
+}
+
+/*
+ * FIXME: really the generic show_regs should take a const pointer argument.
+ */
+void show_regs(struct pt_regs *regs)
+{
+ printk("r0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
+ regs->regs[0], regs->regs[1], regs->regs[2], regs->regs[3],
+ regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]);
+ printk("r8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
+ regs->regs[8], regs->regs[9], regs->regs[10], regs->regs[11],
+ regs->regs[12], regs->regs[13], regs->regs[14], regs->regs[15]);
+ printk("r16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
+ regs->regs[16], regs->regs[17], regs->regs[18], regs->regs[19],
+ regs->regs[20], regs->regs[21], regs->regs[22], regs->regs[23]);
+ printk("r24: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
+ regs->regs[24], regs->regs[25], regs->regs[26], regs->regs[27],
+ regs->regs[28], regs->regs[29], regs->regs[30], regs->regs[31]);
+
+ printk("CEH : %08lx\n", regs->ceh);
+ printk("CEL : %08lx\n", regs->cel);
+
+ printk("EMA:%08lx, epc:%08lx %s\nPSR: %08lx\nECR:%08lx\nCondition : %08lx\n",
+ regs->cp0_ema, regs->cp0_epc, print_tainted(), regs->cp0_psr,
+ regs->cp0_ecr, regs->cp0_condition);
+}
+
+static void show_registers(struct pt_regs *regs)
+{
+ show_regs(regs);
+ printk(KERN_NOTICE "Process %s (pid: %d, stackpage=%08lx)\n",
+ current->comm, current->pid, (unsigned long) current);
+ show_stack(current_thread_info()->task, (long *) regs->regs[0]);
+ show_trace((long *) regs->regs[0]);
+ show_code((unsigned int *) regs->cp0_epc);
+ printk(KERN_NOTICE "\n");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+ show_stack(current_thread_info()->task,
+ (long *) get_irq_regs()->regs[0]);
+}
+EXPORT_SYMBOL(dump_stack);
+
+void __die(const char *str, struct pt_regs *regs, const char *file,
+ const char *func, unsigned long line)
+{
+ console_verbose();
+ printk("%s", str);
+ if (file && func)
+ printk(" in %s:%s, line %ld", file, func, line);
+ printk(":\n");
+ show_registers(regs);
+ do_exit(SIGSEGV);
+}
+
+void __die_if_kernel(const char *str, struct pt_regs *regs,
+ const char *file, const char *func, unsigned long line)
+{
+ if (!user_mode(regs))
+ __die(str, regs, file, func, line);
+}
+
+asmlinkage void do_adelinsn(struct pt_regs *regs)
+{
+ printk("do_ADE-linsn:ema:0x%08lx:epc:0x%08lx\n",
+ regs->cp0_ema, regs->cp0_epc);
+ die_if_kernel("do_ade execution Exception\n", regs);
+ force_sig(SIGBUS, current);
+}
+
+asmlinkage void do_adedata(struct pt_regs *regs)
+{
+ const struct exception_table_entry *fixup;
+ fixup = search_exception_tables(regs->cp0_epc);
+ if (fixup) {
+ regs->cp0_epc = fixup->fixup;
+ return;
+ }
+ printk("do_ADE-data:ema:0x%08lx:epc:0x%08lx\n",
+ regs->cp0_ema, regs->cp0_epc);
+ die_if_kernel("do_ade execution Exception\n", regs);
+ force_sig(SIGBUS, current);
+}
+
+asmlinkage void do_pel(struct pt_regs *regs)
+{
+ die_if_kernel("do_pel execution Exception", regs);
+ force_sig(SIGFPE, current);
+}
+
+asmlinkage void do_cee(struct pt_regs *regs)
+{
+ die_if_kernel("do_cee execution Exception", regs);
+ force_sig(SIGFPE, current);
+}
+
+asmlinkage void do_cpe(struct pt_regs *regs)
+{
+ die_if_kernel("do_cpe execution Exception", regs);
+ force_sig(SIGFPE, current);
+}
+
+asmlinkage void do_be(struct pt_regs *regs)
+{
+ die_if_kernel("do_be execution Exception", regs);
+ force_sig(SIGBUS, current);
+}
+
+asmlinkage void do_ov(struct pt_regs *regs)
+{
+ siginfo_t info;
+
+ die_if_kernel("do_ov execution Exception", regs);
+
+ info.si_code = FPE_INTOVF;
+ info.si_signo = SIGFPE;
+ info.si_errno = 0;
+ info.si_addr = (void *)regs->cp0_epc;
+ force_sig_info(SIGFPE, &info, current);
+}
+
+asmlinkage void do_tr(struct pt_regs *regs)
+{
+ die_if_kernel("do_tr execution Exception", regs);
+ force_sig(SIGTRAP, current);
+}
+
+asmlinkage void do_ri(struct pt_regs *regs)
+{
+ unsigned long epc_insn;
+ unsigned long epc = regs->cp0_epc;
+
+ read_tsk_long(current, epc, &epc_insn);
+ if (current->thread.single_step == 1) {
+ if ((epc == current->thread.addr1) ||
+ (epc == current->thread.addr2)) {
+ user_disable_single_step(current);
+ force_sig(SIGTRAP, current);
+ return;
+ } else
+ BUG();
+ } else if ((epc_insn == BREAKPOINT32_INSN) ||
+ ((epc_insn & 0x0000FFFF) == 0x7002) ||
+ ((epc_insn & 0xFFFF0000) == 0x70020000)) {
+ force_sig(SIGTRAP, current);
+ return;
+ } else {
+ die_if_kernel("do_ri execution Exception", regs);
+ force_sig(SIGILL, current);
+ }
+}
+
+asmlinkage void do_ccu(struct pt_regs *regs)
+{
+ die_if_kernel("do_ccu execution Exception", regs);
+ force_sig(SIGILL, current);
+}
+
+asmlinkage void do_reserved(struct pt_regs *regs)
+{
+ /*
+ * Game over - no way to handle this if it ever occurs. Most probably
+ * caused by a new unknown cpu type or after another deadly
+ * hard/software error.
+ */
+ die_if_kernel("do_reserved execution Exception", regs);
+ show_regs(regs);
+ panic("Caught reserved exception - should not happen.");
+}
+
+/*
+ * NMI exception handler.
+ */
+void nmi_exception_handler(struct pt_regs *regs)
+{
+ die_if_kernel("nmi_exception_handler execution Exception", regs);
+ die("NMI", regs);
+}
+
+/* Install CPU exception handler */
+void *set_except_vector(int n, void *addr)
+{
+ unsigned long handler = (unsigned long) addr;
+ unsigned long old_handler = exception_handlers[n];
+
+ exception_handlers[n] = handler;
+ return (void *)old_handler;
+}
+
+void __init trap_init(void)
+{
+ int i;
+
+ pgd_current = (unsigned long)init_mm.pgd;
+ /* DEBUG EXCEPTION */
+ memcpy((void *)DEBUG_VECTOR_BASE_ADDR,
+ &debug_exception_vector, DEBUG_VECTOR_SIZE);
+ /* NMI EXCEPTION */
+ memcpy((void *)GENERAL_VECTOR_BASE_ADDR,
+ &general_exception_vector, GENERAL_VECTOR_SIZE);
+
+ /*
+ * Initialise exception handlers
+ */
+ for (i = 0; i <= 31; i++)
+ set_except_vector(i, handle_reserved);
+
+ set_except_vector(1, handle_nmi);
+ set_except_vector(2, handle_adelinsn);
+ set_except_vector(3, handle_tlb_refill);
+ set_except_vector(4, handle_tlb_invaild);
+ set_except_vector(5, handle_ibe);
+ set_except_vector(6, handle_pel);
+ set_except_vector(7, handle_sys);
+ set_except_vector(8, handle_ccu);
+ set_except_vector(9, handle_ri);
+ set_except_vector(10, handle_tr);
+ set_except_vector(11, handle_adedata);
+ set_except_vector(12, handle_adedata);
+ set_except_vector(13, handle_tlb_refill);
+ set_except_vector(14, handle_tlb_invaild);
+ set_except_vector(15, handle_mod);
+ set_except_vector(16, handle_cee);
+ set_except_vector(17, handle_cpe);
+ set_except_vector(18, handle_dbe);
+ flush_icache_range(DEBUG_VECTOR_BASE_ADDR, IRQ_VECTOR_BASE_ADDR);
+
+ atomic_inc(&init_mm.mm_count);
+ current->active_mm = &init_mm;
+ cpu_cache_init();
+}
diff --git a/arch/score/kernel/vmlinux.lds.S b/arch/score/kernel/vmlinux.lds.S
new file mode 100644
index 00000000000..eebcbaa4e97
--- /dev/null
+++ b/arch/score/kernel/vmlinux.lds.S
@@ -0,0 +1,89 @@
+/*
+ * arch/score/kernel/vmlinux.lds.S
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+
+OUTPUT_ARCH(score)
+ENTRY(_stext)
+
+jiffies = jiffies_64;
+
+SECTIONS
+{
+ . = CONFIG_MEMORY_START + 0x2000;
+ /* read-only */
+ .text : {
+ _text = .; /* Text and read-only data */
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ KPROBES_TEXT
+ *(.text.*)
+ *(.fixup)
+ . = ALIGN (4) ;
+ _etext = .; /* End of text section */
+ }
+
+ . = ALIGN(16);
+ RODATA
+
+ EXCEPTION_TABLE(16)
+
+ RW_DATA_SECTION(32, PAGE_SIZE, THREAD_SIZE)
+
+ /* We want the small data sections together, so single-instruction offsets
+ can access them all, and initialized data all before uninitialized, so
+ we can shorten the on-disk segment size. */
+ . = ALIGN(8);
+ .sdata : {
+ *(.sdata)
+ }
+ _edata = .; /* End of data section */
+
+ /* will be freed after init */
+ . = ALIGN(PAGE_SIZE); /* Init code and data */
+ __init_begin = .;
+
+ INIT_TEXT_SECTION(PAGE_SIZE)
+ INIT_DATA_SECTION(16)
+
+ /* .exit.text is discarded at runtime, not link time, to deal with
+ * references from .rodata
+ */
+ .exit.text : {
+ EXIT_TEXT
+ }
+ .exit.data : {
+ EXIT_DATA
+ }
+ . = ALIGN(PAGE_SIZE);
+ __init_end = .;
+ /* freed after init ends here */
+
+ BSS_SECTION(0, 0, 0)
+ _end = .;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 16:56:28 +0000