| /* |
| * 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 */ |
