| /* |
| * Copyright (C) 1994 Linus Torvalds |
| */ |
| |
| #ifndef __ASM_X86_64_PROCESSOR_H |
| #define __ASM_X86_64_PROCESSOR_H |
| |
| #include <asm/segment.h> |
| #include <asm/page.h> |
| #include <asm/types.h> |
| #include <asm/sigcontext.h> |
| #include <asm/cpufeature.h> |
| #include <linux/threads.h> |
| #include <asm/msr.h> |
| #include <asm/current.h> |
| #include <asm/system.h> |
| #include <linux/personality.h> |
| #include <asm/desc_defs.h> |
| |
| /* |
| * User space process size. 47bits minus one guard page. |
| */ |
| #define TASK_SIZE64 (0x800000000000UL - 4096) |
| |
| /* This decides where the kernel will search for a free chunk of vm |
| * space during mmap's. |
| */ |
| #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000) |
| |
| #define TASK_SIZE (test_thread_flag(TIF_IA32) ? IA32_PAGE_OFFSET : TASK_SIZE64) |
| #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64) |
| |
| |
| |
| DECLARE_PER_CPU(struct orig_ist, orig_ist); |
| |
| #define INIT_THREAD { \ |
| .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ |
| } |
| |
| #define INIT_TSS { \ |
| .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ |
| } |
| |
| #define start_thread(regs,new_rip,new_rsp) do { \ |
| asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \ |
| load_gs_index(0); \ |
| (regs)->ip = (new_rip); \ |
| (regs)->sp = (new_rsp); \ |
| write_pda(oldrsp, (new_rsp)); \ |
| (regs)->cs = __USER_CS; \ |
| (regs)->ss = __USER_DS; \ |
| (regs)->flags = 0x200; \ |
| set_fs(USER_DS); \ |
| } while(0) |
| |
| /* |
| * Return saved PC of a blocked thread. |
| * What is this good for? it will be always the scheduler or ret_from_fork. |
| */ |
| #define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8)) |
| |
| #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1) |
| #define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */ |
| |
| #endif /* __ASM_X86_64_PROCESSOR_H */ |