diff options
Diffstat (limited to 'arch/blackfin/mach-common/entry.S')
| -rw-r--r-- | arch/blackfin/mach-common/entry.S | 92 |
1 files changed, 42 insertions, 50 deletions
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index c6ae8442fc4..5531f49c84e 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -36,6 +36,7 @@ #include <linux/init.h> #include <linux/linkage.h> #include <linux/unistd.h> +#include <linux/threads.h> #include <asm/blackfin.h> #include <asm/errno.h> #include <asm/fixed_code.h> @@ -75,11 +76,11 @@ ENTRY(_ex_workaround_261) * handle it. */ P4 = R7; /* Store EXCAUSE */ - p5.l = _last_cplb_fault_retx; - p5.h = _last_cplb_fault_retx; - r7 = [p5]; + + GET_PDA(p5, r7); + r7 = [p5 + PDA_LFRETX]; r6 = retx; - [p5] = r6; + [p5 + PDA_LFRETX] = r6; cc = r6 == r7; if !cc jump _bfin_return_from_exception; /* fall through */ @@ -324,7 +325,9 @@ ENTRY(_ex_trap_c) [p4] = p5; csync; + GET_PDA(p5, r6); #ifndef CONFIG_DEBUG_DOUBLEFAULT + /* * Save these registers, as they are only valid in exception context * (where we are now - as soon as we defer to IRQ5, they can change) @@ -335,29 +338,25 @@ ENTRY(_ex_trap_c) p4.l = lo(DCPLB_FAULT_ADDR); p4.h = hi(DCPLB_FAULT_ADDR); r7 = [p4]; - p5.h = _saved_dcplb_fault_addr; - p5.l = _saved_dcplb_fault_addr; - [p5] = r7; + [p5 + PDA_DCPLB] = r7; - r7 = [p4 + (ICPLB_FAULT_ADDR - DCPLB_FAULT_ADDR)]; - p5.h = _saved_icplb_fault_addr; - p5.l = _saved_icplb_fault_addr; - [p5] = r7; + p4.l = lo(ICPLB_FAULT_ADDR); + p4.h = hi(ICPLB_FAULT_ADDR); + r6 = [p4]; + [p5 + PDA_ICPLB] = r6; r6 = retx; - p4.l = _saved_retx; - p4.h = _saved_retx; - [p4] = r6; + [p5 + PDA_RETX] = r6; #endif r6 = SYSCFG; - [p4 + 4] = r6; + [p5 + PDA_SYSCFG] = r6; BITCLR(r6, 0); SYSCFG = r6; /* Disable all interrupts, but make sure level 5 is enabled so * we can switch to that level. Save the old mask. */ cli r6; - [p4 + 8] = r6; + [p5 + PDA_EXIMASK] = r6; p4.l = lo(SAFE_USER_INSTRUCTION); p4.h = hi(SAFE_USER_INSTRUCTION); @@ -424,17 +423,16 @@ ENDPROC(_double_fault) ENTRY(_exception_to_level5) SAVE_ALL_SYS - p4.l = _saved_retx; - p4.h = _saved_retx; - r6 = [p4]; + GET_PDA(p4, r7); /* Fetch current PDA */ + r6 = [p4 + PDA_RETX]; [sp + PT_PC] = r6; - r6 = [p4 + 4]; + r6 = [p4 + PDA_SYSCFG]; [sp + PT_SYSCFG] = r6; /* Restore interrupt mask. We haven't pushed RETI, so this * doesn't enable interrupts until we return from this handler. */ - r6 = [p4 + 8]; + r6 = [p4 + PDA_EXIMASK]; sti r6; /* Restore the hardware error vector. */ @@ -478,8 +476,8 @@ ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/ * scratch register (for want of a better option). */ EX_SCRATCH_REG = sp; - sp.l = _exception_stack_top; - sp.h = _exception_stack_top; + GET_PDA_SAFE(sp); + sp = [sp + PDA_EXSTACK] /* Try to deal with syscalls quickly. */ [--sp] = ASTAT; [--sp] = (R7:6,P5:4); @@ -501,27 +499,22 @@ ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/ * but they are not very interesting, so don't save them */ + GET_PDA(p5, r7); p4.l = lo(DCPLB_FAULT_ADDR); p4.h = hi(DCPLB_FAULT_ADDR); r7 = [p4]; - p5.h = _saved_dcplb_fault_addr; - p5.l = _saved_dcplb_fault_addr; - [p5] = r7; + [p5 + PDA_DCPLB] = r7; - r7 = [p4 + (ICPLB_FAULT_ADDR - DCPLB_FAULT_ADDR)]; - p5.h = _saved_icplb_fault_addr; - p5.l = _saved_icplb_fault_addr; - [p5] = r7; + p4.l = lo(ICPLB_FAULT_ADDR); + p4.h = hi(ICPLB_FAULT_ADDR); + r7 = [p4]; + [p5 + PDA_ICPLB] = r7; - p4.l = _saved_retx; - p4.h = _saved_retx; r6 = retx; - [p4] = r6; + [p5 + PDA_RETX] = r6; r7 = SEQSTAT; /* reason code is in bit 5:0 */ - p4.l = _saved_seqstat; - p4.h = _saved_seqstat; - [p4] = r7; + [p5 + PDA_SEQSTAT] = r7; #else r7 = SEQSTAT; /* reason code is in bit 5:0 */ #endif @@ -546,11 +539,11 @@ ENTRY(_kernel_execve) p0 = sp; r3 = SIZEOF_PTREGS / 4; r4 = 0(x); -0: +.Lclear_regs: [p0++] = r4; r3 += -1; cc = r3 == 0; - if !cc jump 0b (bp); + if !cc jump .Lclear_regs (bp); p0 = sp; sp += -16; @@ -558,7 +551,7 @@ ENTRY(_kernel_execve) call _do_execve; SP += 16; cc = r0 == 0; - if ! cc jump 1f; + if ! cc jump .Lexecve_failed; /* Success. Copy our temporary pt_regs to the top of the kernel * stack and do a normal exception return. */ @@ -574,12 +567,12 @@ ENTRY(_kernel_execve) p0 = fp; r4 = [p0--]; r3 = SIZEOF_PTREGS / 4; -0: +.Lcopy_regs: r4 = [p0--]; [p1--] = r4; r3 += -1; cc = r3 == 0; - if ! cc jump 0b (bp); + if ! cc jump .Lcopy_regs (bp); r0 = (KERNEL_STACK_SIZE - SIZEOF_PTREGS) (z); p1 = r0; @@ -591,7 +584,7 @@ ENTRY(_kernel_execve) RESTORE_CONTEXT; rti; -1: +.Lexecve_failed: unlink; rts; ENDPROC(_kernel_execve) @@ -925,9 +918,14 @@ _schedule_and_signal_from_int: p1 = rets; [sp + PT_RESERVED] = p1; +#ifdef CONFIG_SMP + GET_PDA(p0, r0); /* Fetch current PDA (can't migrate to other CPU here) */ + r0 = [p0 + PDA_IRQFLAGS]; +#else p0.l = _irq_flags; p0.h = _irq_flags; r0 = [p0]; +#endif sti r0; r0 = sp; @@ -1539,12 +1537,6 @@ ENTRY(_sys_call_table) .endr END(_sys_call_table) -#if ANOMALY_05000261 -/* Used by the assembly entry point to work around an anomaly. */ -_last_cplb_fault_retx: - .long 0; -#endif - #ifdef CONFIG_EXCEPTION_L1_SCRATCH /* .section .l1.bss.scratch */ .set _exception_stack_top, L1_SCRATCH_START + L1_SCRATCH_LENGTH @@ -1554,8 +1546,8 @@ _last_cplb_fault_retx: #else .bss #endif -_exception_stack: - .rept 1024 +ENTRY(_exception_stack) + .rept 1024 * NR_CPUS .long 0 .endr _exception_stack_top: |