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/*
* Copyright (C) 1994 Linus Torvalds
*/
#ifndef __ASM_I386_PROCESSOR_H
#define __ASM_I386_PROCESSOR_H
#include <asm/vm86.h>
#include <asm/math_emu.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/types.h>
#include <asm/sigcontext.h>
#include <asm/cpufeature.h>
#include <asm/msr.h>
#include <asm/system.h>
#include <linux/threads.h>
#include <linux/init.h>
#include <asm/desc_defs.h>
/*
* the following now lives in the per cpu area:
* extern int cpu_llc_id[NR_CPUS];
*/
DECLARE_PER_CPU(u8, cpu_llc_id);
/*
* User space process size: 3GB (default).
*/
#define TASK_SIZE (PAGE_OFFSET)
#define INIT_THREAD { \
.sp0 = sizeof(init_stack) + (long)&init_stack, \
.vm86_info = NULL, \
.sysenter_cs = __KERNEL_CS, \
.io_bitmap_ptr = NULL, \
.fs = __KERNEL_PERCPU, \
}
/*
* Note that the .io_bitmap member must be extra-big. This is because
* the CPU will access an additional byte beyond the end of the IO
* permission bitmap. The extra byte must be all 1 bits, and must
* be within the limit.
*/
#define INIT_TSS { \
.x86_tss = { \
.sp0 = sizeof(init_stack) + (long)&init_stack, \
.ss0 = __KERNEL_DS, \
.ss1 = __KERNEL_CS, \
.io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
}, \
.io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
}
#define start_thread(regs, new_eip, new_esp) do { \
__asm__("movl %0,%%gs": :"r" (0)); \
regs->fs = 0; \
set_fs(USER_DS); \
regs->ds = __USER_DS; \
regs->es = __USER_DS; \
regs->ss = __USER_DS; \
regs->cs = __USER_CS; \
regs->ip = new_eip; \
regs->sp = new_esp; \
} while (0)
extern unsigned long thread_saved_pc(struct task_struct *tsk);
#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
#define KSTK_TOP(info) \
({ \
unsigned long *__ptr = (unsigned long *)(info); \
(unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \
})
/*
* The below -8 is to reserve 8 bytes on top of the ring0 stack.
* This is necessary to guarantee that the entire "struct pt_regs"
* is accessable even if the CPU haven't stored the SS/ESP registers
* on the stack (interrupt gate does not save these registers
* when switching to the same priv ring).
* Therefore beware: accessing the ss/esp fields of the
* "struct pt_regs" is possible, but they may contain the
* completely wrong values.
*/
#define task_pt_regs(task) \
({ \
struct pt_regs *__regs__; \
__regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
__regs__ - 1; \
})
#define KSTK_ESP(task) (task_pt_regs(task)->sp)
#endif /* __ASM_I386_PROCESSOR_H */
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