From 8ede0bdb63305d3353efd97e9af6210afb05734e Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 17 Aug 2008 19:13:17 -0400 Subject: x86, um: initial part of asm-um move Signed-off-by: Al Viro Signed-off-by: H. Peter Anvin --- arch/um/include/asm/processor-generic.h | 136 ++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 arch/um/include/asm/processor-generic.h (limited to 'arch/um/include/asm/processor-generic.h') diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h new file mode 100644 index 00000000000..bed668824b5 --- /dev/null +++ b/arch/um/include/asm/processor-generic.h @@ -0,0 +1,136 @@ +/* + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL + */ + +#ifndef __UM_PROCESSOR_GENERIC_H +#define __UM_PROCESSOR_GENERIC_H + +struct pt_regs; + +struct task_struct; + +#include "asm/ptrace.h" +#include "registers.h" +#include "sysdep/archsetjmp.h" + +struct mm_struct; + +struct thread_struct { + struct task_struct *saved_task; + /* + * This flag is set to 1 before calling do_fork (and analyzed in + * copy_thread) to mark that we are begin called from userspace (fork / + * vfork / clone), and reset to 0 after. It is left to 0 when called + * from kernelspace (i.e. kernel_thread() or fork_idle(), + * as of 2.6.11). + */ + int forking; + struct pt_regs regs; + int singlestep_syscall; + void *fault_addr; + jmp_buf *fault_catcher; + struct task_struct *prev_sched; + unsigned long temp_stack; + jmp_buf *exec_buf; + struct arch_thread arch; + jmp_buf switch_buf; + int mm_count; + struct { + int op; + union { + struct { + int pid; + } fork, exec; + struct { + int (*proc)(void *); + void *arg; + } thread; + struct { + void (*proc)(void *); + void *arg; + } cb; + } u; + } request; +}; + +#define INIT_THREAD \ +{ \ + .forking = 0, \ + .regs = EMPTY_REGS, \ + .fault_addr = NULL, \ + .prev_sched = NULL, \ + .temp_stack = 0, \ + .exec_buf = NULL, \ + .arch = INIT_ARCH_THREAD, \ + .request = { 0 } \ +} + +extern struct task_struct *alloc_task_struct(void); + +static inline void release_thread(struct task_struct *task) +{ +} + +extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); + +static inline void prepare_to_copy(struct task_struct *tsk) +{ +} + + +extern unsigned long thread_saved_pc(struct task_struct *t); + +static inline void mm_copy_segments(struct mm_struct *from_mm, + struct mm_struct *new_mm) +{ +} + +#define init_stack (init_thread_union.stack) + +/* + * User space process size: 3GB (default). + */ +extern unsigned long task_size; + +#define TASK_SIZE (task_size) + +#undef STACK_TOP +#undef STACK_TOP_MAX + +extern unsigned long stacksizelim; + +#define STACK_ROOM (stacksizelim) +#define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE) +#define STACK_TOP_MAX STACK_TOP + +/* This decides where the kernel will search for a free chunk of vm + * space during mmap's. + */ +#define TASK_UNMAPPED_BASE (0x40000000) + +extern void start_thread(struct pt_regs *regs, unsigned long entry, + unsigned long stack); + +struct cpuinfo_um { + unsigned long loops_per_jiffy; + int ipi_pipe[2]; +}; + +extern struct cpuinfo_um boot_cpu_data; + +#define my_cpu_data cpu_data[smp_processor_id()] + +#ifdef CONFIG_SMP +extern struct cpuinfo_um cpu_data[]; +#define current_cpu_data cpu_data[smp_processor_id()] +#else +#define cpu_data (&boot_cpu_data) +#define current_cpu_data boot_cpu_data +#endif + + +#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf) +extern unsigned long get_wchan(struct task_struct *p); + +#endif -- cgit v1.2.3