46265df040
This patch moves i387 definitions from processor_32.h and processor_64.h to processor.h. They are different. Very different. And there's appearently nothing we can do about it, so they're enclosed inside ifdefs. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/*
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* Copyright (C) 1994 Linus Torvalds
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*/
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#ifndef __ASM_I386_PROCESSOR_H
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#define __ASM_I386_PROCESSOR_H
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#include <asm/vm86.h>
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#include <asm/math_emu.h>
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#include <asm/segment.h>
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#include <asm/page.h>
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#include <asm/types.h>
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#include <asm/sigcontext.h>
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#include <asm/cpufeature.h>
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#include <asm/msr.h>
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#include <asm/system.h>
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#include <linux/threads.h>
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#include <linux/init.h>
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#include <asm/desc_defs.h>
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/*
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* the following now lives in the per cpu area:
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* extern int cpu_llc_id[NR_CPUS];
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*/
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DECLARE_PER_CPU(u8, cpu_llc_id);
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/*
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* User space process size: 3GB (default).
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*/
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#define TASK_SIZE (PAGE_OFFSET)
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#define INIT_THREAD { \
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.sp0 = sizeof(init_stack) + (long)&init_stack, \
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.vm86_info = NULL, \
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.sysenter_cs = __KERNEL_CS, \
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.io_bitmap_ptr = NULL, \
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.fs = __KERNEL_PERCPU, \
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}
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/*
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* Note that the .io_bitmap member must be extra-big. This is because
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* the CPU will access an additional byte beyond the end of the IO
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* permission bitmap. The extra byte must be all 1 bits, and must
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* be within the limit.
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*/
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#define INIT_TSS { \
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.x86_tss = { \
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.sp0 = sizeof(init_stack) + (long)&init_stack, \
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.ss0 = __KERNEL_DS, \
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.ss1 = __KERNEL_CS, \
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.io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
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}, \
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.io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
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}
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#define start_thread(regs, new_eip, new_esp) do { \
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__asm__("movl %0,%%gs": :"r" (0)); \
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regs->fs = 0; \
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set_fs(USER_DS); \
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regs->ds = __USER_DS; \
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regs->es = __USER_DS; \
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regs->ss = __USER_DS; \
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regs->cs = __USER_CS; \
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regs->ip = new_eip; \
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regs->sp = new_esp; \
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} while (0)
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extern unsigned long thread_saved_pc(struct task_struct *tsk);
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#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
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#define KSTK_TOP(info) \
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({ \
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unsigned long *__ptr = (unsigned long *)(info); \
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(unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \
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})
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/*
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* The below -8 is to reserve 8 bytes on top of the ring0 stack.
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* This is necessary to guarantee that the entire "struct pt_regs"
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* is accessable even if the CPU haven't stored the SS/ESP registers
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* on the stack (interrupt gate does not save these registers
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* when switching to the same priv ring).
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* Therefore beware: accessing the ss/esp fields of the
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* "struct pt_regs" is possible, but they may contain the
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* completely wrong values.
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*/
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#define task_pt_regs(task) \
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({ \
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struct pt_regs *__regs__; \
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__regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
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__regs__ - 1; \
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})
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#define KSTK_ESP(task) (task_pt_regs(task)->sp)
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#endif /* __ASM_I386_PROCESSOR_H */
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