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Diffstat (limited to 'include/asm-x86/processor.h')
| -rw-r--r-- | include/asm-x86/processor.h | 946 |
1 files changed, 0 insertions, 946 deletions
diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h deleted file mode 100644 index 4df3e2f6fb5..00000000000 --- a/include/asm-x86/processor.h +++ /dev/null @@ -1,946 +0,0 @@ -#ifndef __ASM_X86_PROCESSOR_H -#define __ASM_X86_PROCESSOR_H - -#include <asm/processor-flags.h> - -/* Forward declaration, a strange C thing */ -struct task_struct; -struct mm_struct; - -#include <asm/vm86.h> -#include <asm/math_emu.h> -#include <asm/segment.h> -#include <asm/types.h> -#include <asm/sigcontext.h> -#include <asm/current.h> -#include <asm/cpufeature.h> -#include <asm/system.h> -#include <asm/page.h> -#include <asm/percpu.h> -#include <asm/msr.h> -#include <asm/desc_defs.h> -#include <asm/nops.h> - -#include <linux/personality.h> -#include <linux/cpumask.h> -#include <linux/cache.h> -#include <linux/threads.h> -#include <linux/init.h> - -/* - * Default implementation of macro that returns current - * instruction pointer ("program counter"). - */ -static inline void *current_text_addr(void) -{ - void *pc; - - asm volatile("mov $1f, %0; 1:":"=r" (pc)); - - return pc; -} - -#ifdef CONFIG_X86_VSMP -# define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT) -# define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT) -#else -# define ARCH_MIN_TASKALIGN 16 -# define ARCH_MIN_MMSTRUCT_ALIGN 0 -#endif - -/* - * CPU type and hardware bug flags. Kept separately for each CPU. - * Members of this structure are referenced in head.S, so think twice - * before touching them. [mj] - */ - -struct cpuinfo_x86 { - __u8 x86; /* CPU family */ - __u8 x86_vendor; /* CPU vendor */ - __u8 x86_model; - __u8 x86_mask; -#ifdef CONFIG_X86_32 - char wp_works_ok; /* It doesn't on 386's */ - - /* Problems on some 486Dx4's and old 386's: */ - char hlt_works_ok; - char hard_math; - char rfu; - char fdiv_bug; - char f00f_bug; - char coma_bug; - char pad0; -#else - /* Number of 4K pages in DTLB/ITLB combined(in pages): */ - int x86_tlbsize; - __u8 x86_virt_bits; - __u8 x86_phys_bits; - /* CPUID returned core id bits: */ - __u8 x86_coreid_bits; - /* Max extended CPUID function supported: */ - __u32 extended_cpuid_level; -#endif - /* Maximum supported CPUID level, -1=no CPUID: */ - int cpuid_level; - __u32 x86_capability[NCAPINTS]; - char x86_vendor_id[16]; - char x86_model_id[64]; - /* in KB - valid for CPUS which support this call: */ - int x86_cache_size; - int x86_cache_alignment; /* In bytes */ - int x86_power; - unsigned long loops_per_jiffy; -#ifdef CONFIG_SMP - /* cpus sharing the last level cache: */ - cpumask_t llc_shared_map; -#endif - /* cpuid returned max cores value: */ - u16 x86_max_cores; - u16 apicid; - u16 initial_apicid; - u16 x86_clflush_size; -#ifdef CONFIG_SMP - /* number of cores as seen by the OS: */ - u16 booted_cores; - /* Physical processor id: */ - u16 phys_proc_id; - /* Core id: */ - u16 cpu_core_id; - /* Index into per_cpu list: */ - u16 cpu_index; -#endif -} __attribute__((__aligned__(SMP_CACHE_BYTES))); - -#define X86_VENDOR_INTEL 0 -#define X86_VENDOR_CYRIX 1 -#define X86_VENDOR_AMD 2 -#define X86_VENDOR_UMC 3 -#define X86_VENDOR_CENTAUR 5 -#define X86_VENDOR_TRANSMETA 7 -#define X86_VENDOR_NSC 8 -#define X86_VENDOR_NUM 9 - -#define X86_VENDOR_UNKNOWN 0xff - -/* - * capabilities of CPUs - */ -extern struct cpuinfo_x86 boot_cpu_data; -extern struct cpuinfo_x86 new_cpu_data; - -extern struct tss_struct doublefault_tss; -extern __u32 cleared_cpu_caps[NCAPINTS]; - -#ifdef CONFIG_SMP -DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info); -#define cpu_data(cpu) per_cpu(cpu_info, cpu) -#define current_cpu_data __get_cpu_var(cpu_info) -#else -#define cpu_data(cpu) boot_cpu_data -#define current_cpu_data boot_cpu_data -#endif - -static inline int hlt_works(int cpu) -{ -#ifdef CONFIG_X86_32 - return cpu_data(cpu).hlt_works_ok; -#else - return 1; -#endif -} - -#define cache_line_size() (boot_cpu_data.x86_cache_alignment) - -extern void cpu_detect(struct cpuinfo_x86 *c); - -extern void early_cpu_init(void); -extern void identify_boot_cpu(void); -extern void identify_secondary_cpu(struct cpuinfo_x86 *); -extern void print_cpu_info(struct cpuinfo_x86 *); -extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); -extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); -extern unsigned short num_cache_leaves; - -#if defined(CONFIG_X86_HT) || defined(CONFIG_X86_64) -extern void detect_ht(struct cpuinfo_x86 *c); -#else -static inline void detect_ht(struct cpuinfo_x86 *c) {} -#endif - -static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, - unsigned int *ecx, unsigned int *edx) -{ - /* ecx is often an input as well as an output. */ - asm("cpuid" - : "=a" (*eax), - "=b" (*ebx), - "=c" (*ecx), - "=d" (*edx) - : "0" (*eax), "2" (*ecx)); -} - -static inline void load_cr3(pgd_t *pgdir) -{ - write_cr3(__pa(pgdir)); -} - -#ifdef CONFIG_X86_32 -/* This is the TSS defined by the hardware. */ -struct x86_hw_tss { - unsigned short back_link, __blh; - unsigned long sp0; - unsigned short ss0, __ss0h; - unsigned long sp1; - /* ss1 caches MSR_IA32_SYSENTER_CS: */ - unsigned short ss1, __ss1h; - unsigned long sp2; - unsigned short ss2, __ss2h; - unsigned long __cr3; - unsigned long ip; - unsigned long flags; - unsigned long ax; - unsigned long cx; - unsigned long dx; - unsigned long bx; - unsigned long sp; - unsigned long bp; - unsigned long si; - unsigned long di; - unsigned short es, __esh; - unsigned short cs, __csh; - unsigned short ss, __ssh; - unsigned short ds, __dsh; - unsigned short fs, __fsh; - unsigned short gs, __gsh; - unsigned short ldt, __ldth; - unsigned short trace; - unsigned short io_bitmap_base; - -} __attribute__((packed)); -#else -struct x86_hw_tss { - u32 reserved1; - u64 sp0; - u64 sp1; - u64 sp2; - u64 reserved2; - u64 ist[7]; - u32 reserved3; - u32 reserved4; - u16 reserved5; - u16 io_bitmap_base; - -} __attribute__((packed)) ____cacheline_aligned; -#endif - -/* - * IO-bitmap sizes: - */ -#define IO_BITMAP_BITS 65536 -#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) -#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) -#define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap) -#define INVALID_IO_BITMAP_OFFSET 0x8000 -#define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000 - -struct tss_struct { - /* - * The hardware state: - */ - struct x86_hw_tss x86_tss; - - /* - * The extra 1 is there 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. - */ - unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; - /* - * Cache the current maximum and the last task that used the bitmap: - */ - unsigned long io_bitmap_max; - struct thread_struct *io_bitmap_owner; - - /* - * .. and then another 0x100 bytes for the emergency kernel stack: - */ - unsigned long stack[64]; - -} ____cacheline_aligned; - -DECLARE_PER_CPU(struct tss_struct, init_tss); - -/* - * Save the original ist values for checking stack pointers during debugging - */ -struct orig_ist { - unsigned long ist[7]; -}; - -#define MXCSR_DEFAULT 0x1f80 - -struct i387_fsave_struct { - u32 cwd; /* FPU Control Word */ - u32 swd; /* FPU Status Word */ - u32 twd; /* FPU Tag Word */ - u32 fip; /* FPU IP Offset */ - u32 fcs; /* FPU IP Selector */ - u32 foo; /* FPU Operand Pointer Offset */ - u32 fos; /* FPU Operand Pointer Selector */ - - /* 8*10 bytes for each FP-reg = 80 bytes: */ - u32 st_space[20]; - - /* Software status information [not touched by FSAVE ]: */ - u32 status; -}; - -struct i387_fxsave_struct { - u16 cwd; /* Control Word */ - u16 swd; /* Status Word */ - u16 twd; /* Tag Word */ - u16 fop; /* Last Instruction Opcode */ - union { - struct { - u64 rip; /* Instruction Pointer */ - u64 rdp; /* Data Pointer */ - }; - struct { - u32 fip; /* FPU IP Offset */ - u32 fcs; /* FPU IP Selector */ - u32 foo; /* FPU Operand Offset */ - u32 fos; /* FPU Operand Selector */ - }; - }; - u32 mxcsr; /* MXCSR Register State */ - u32 mxcsr_mask; /* MXCSR Mask */ - - /* 8*16 bytes for each FP-reg = 128 bytes: */ - u32 st_space[32]; - - /* 16*16 bytes for each XMM-reg = 256 bytes: */ - u32 xmm_space[64]; - - u32 padding[24]; - -} __attribute__((aligned(16))); - -struct i387_soft_struct { - u32 cwd; - u32 swd; - u32 twd; - u32 fip; - u32 fcs; - u32 foo; - u32 fos; - /* 8*10 bytes for each FP-reg = 80 bytes: */ - u32 st_space[20]; - u8 ftop; - u8 changed; - u8 lookahead; - u8 no_update; - u8 rm; - u8 alimit; - struct info *info; - u32 entry_eip; -}; - -union thread_xstate { - struct i387_fsave_struct fsave; - struct i387_fxsave_struct fxsave; - struct i387_soft_struct soft; -}; - -#ifdef CONFIG_X86_64 -DECLARE_PER_CPU(struct orig_ist, orig_ist); -#endif - -extern void print_cpu_info(struct cpuinfo_x86 *); -extern unsigned int xstate_size; -extern void free_thread_xstate(struct task_struct *); -extern struct kmem_cache *task_xstate_cachep; -extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); -extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); -extern unsigned short num_cache_leaves; - -struct thread_struct { - /* Cached TLS descriptors: */ - struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; - unsigned long sp0; - unsigned long sp; -#ifdef CONFIG_X86_32 - unsigned long sysenter_cs; -#else - unsigned long usersp; /* Copy from PDA */ - unsigned short es; - unsigned short ds; - unsigned short fsindex; - unsigned short gsindex; -#endif - unsigned long ip; - unsigned long fs; - unsigned long gs; - /* Hardware debugging registers: */ - unsigned long debugreg0; - unsigned long debugreg1; - unsigned long debugreg2; - unsigned long debugreg3; - unsigned long debugreg6; - unsigned long debugreg7; - /* Fault info: */ - unsigned long cr2; - unsigned long trap_no; - unsigned long error_code; - /* floating point and extended processor state */ - union thread_xstate *xstate; -#ifdef CONFIG_X86_32 - /* Virtual 86 mode info */ - struct vm86_struct __user *vm86_info; - unsigned long screen_bitmap; - unsigned long v86flags; - unsigned long v86mask; - unsigned long saved_sp0; - unsigned int saved_fs; - unsigned int saved_gs; -#endif - /* IO permissions: */ - unsigned long *io_bitmap_ptr; - unsigned long iopl; - /* Max allowed port in the bitmap, in bytes: */ - unsigned io_bitmap_max; -/* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */ - unsigned long debugctlmsr; -/* Debug Store - if not 0 points to a DS Save Area configuration; - * goes into MSR_IA32_DS_AREA */ - unsigned long ds_area_msr; -}; - -static inline unsigned long native_get_debugreg(int regno) -{ - unsigned long val = 0; /* Damn you, gcc! */ - - switch (regno) { - case 0: - asm("mov %%db0, %0" :"=r" (val)); - break; - case 1: - asm("mov %%db1, %0" :"=r" (val)); - break; - case 2: - asm("mov %%db2, %0" :"=r" (val)); - break; - case 3: - asm("mov %%db3, %0" :"=r" (val)); - break; - case 6: - asm("mov %%db6, %0" :"=r" (val)); - break; - case 7: - asm("mov %%db7, %0" :"=r" (val)); - break; - default: - BUG(); - } - return val; -} - -static inline void native_set_debugreg(int regno, unsigned long value) -{ - switch (regno) { - case 0: - asm("mov %0, %%db0" ::"r" (value)); - break; - case 1: - asm("mov %0, %%db1" ::"r" (value)); - break; - case 2: - asm("mov %0, %%db2" ::"r" (value)); - break; - case 3: - asm("mov %0, %%db3" ::"r" (value)); - break; - case 6: - asm("mov %0, %%db6" ::"r" (value)); - break; - case 7: - asm("mov %0, %%db7" ::"r" (value)); - break; - default: - BUG(); - } -} - -/* - * Set IOPL bits in EFLAGS from given mask - */ -static inline void native_set_iopl_mask(unsigned mask) -{ -#ifdef CONFIG_X86_32 - unsigned int reg; - - asm volatile ("pushfl;" - "popl %0;" - "andl %1, %0;" - "orl %2, %0;" - "pushl %0;" - "popfl" - : "=&r" (reg) - : "i" (~X86_EFLAGS_IOPL), "r" (mask)); -#endif -} - -static inline void -native_load_sp0(struct tss_struct *tss, struct thread_struct *thread) -{ - tss->x86_tss.sp0 = thread->sp0; -#ifdef CONFIG_X86_32 - /* Only happens when SEP is enabled, no need to test "SEP"arately: */ - if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { - tss->x86_tss.ss1 = thread->sysenter_cs; - wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); - } -#endif -} - -static inline void native_swapgs(void) -{ -#ifdef CONFIG_X86_64 - asm volatile("swapgs" ::: "memory"); -#endif -} - -#ifdef CONFIG_PARAVIRT -#include <asm/paravirt.h> -#else -#define __cpuid native_cpuid -#define paravirt_enabled() 0 - -/* - * These special macros can be used to get or set a debugging register - */ -#define get_debugreg(var, register) \ - (var) = native_get_debugreg(register) -#define set_debugreg(value, register) \ - native_set_debugreg(register, value) - -static inline void load_sp0(struct tss_struct *tss, - struct thread_struct *thread) -{ - native_load_sp0(tss, thread); -} - -#define set_iopl_mask native_set_iopl_mask -#endif /* CONFIG_PARAVIRT */ - -/* - * Save the cr4 feature set we're using (ie - * Pentium 4MB enable and PPro Global page - * enable), so that any CPU's that boot up - * after us can get the correct flags. - */ -extern unsigned long mmu_cr4_features; - -static inline void set_in_cr4(unsigned long mask) -{ - unsigned cr4; - - mmu_cr4_features |= mask; - cr4 = read_cr4(); - cr4 |= mask; - write_cr4(cr4); -} - -static inline void clear_in_cr4(unsigned long mask) -{ - unsigned cr4; - - mmu_cr4_features &= ~mask; - cr4 = read_cr4(); - cr4 &= ~mask; - write_cr4(cr4); -} - -struct microcode_header { - unsigned int hdrver; - unsigned int rev; - unsigned int date; - unsigned int sig; - unsigned int cksum; - unsigned int ldrver; - unsigned int pf; - unsigned int datasize; - unsigned int totalsize; - unsigned int reserved[3]; -}; - -struct microcode { - struct microcode_header hdr; - unsigned int bits[0]; -}; - -typedef struct microcode microcode_t; -typedef struct microcode_header microcode_header_t; - -/* microcode format is extended from prescott processors */ -struct extended_signature { - unsigned int sig; - unsigned int pf; - unsigned int cksum; -}; - -struct extended_sigtable { - unsigned int count; - unsigned int cksum; - unsigned int reserved[3]; - struct extended_signature sigs[0]; -}; - -typedef struct { - unsigned long seg; -} mm_segment_t; - - -/* - * create a kernel thread without removing it from tasklists - */ -extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); - -/* Free all resources held by a thread. */ -extern void release_thread(struct task_struct *); - -/* Prepare to copy thread state - unlazy all lazy state */ -extern void prepare_to_copy(struct task_struct *tsk); - -unsigned long get_wchan(struct task_struct *p); - -/* - * Generic CPUID function - * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx - * resulting in stale register contents being returned. - */ -static inline void cpuid(unsigned int op, - unsigned int *eax, unsigned int *ebx, - unsigned int *ecx, unsigned int *edx) -{ - *eax = op; - *ecx = 0; - __cpuid(eax, ebx, ecx, edx); -} - -/* Some CPUID calls want 'count' to be placed in ecx */ -static inline void cpuid_count(unsigned int op, int count, - unsigned int *eax, unsigned int *ebx, - unsigned int *ecx, unsigned int *edx) -{ - *eax = op; - *ecx = count; - __cpuid(eax, ebx, ecx, edx); -} - -/* - * CPUID functions returning a single datum - */ -static inline unsigned int cpuid_eax(unsigned int op) -{ - unsigned int eax, ebx, ecx, edx; - - cpuid(op, &eax, &ebx, &ecx, &edx); - - return eax; -} - -static inline unsigned int cpuid_ebx(unsigned int op) -{ - unsigned int eax, ebx, ecx, edx; - - cpuid(op, &eax, &ebx, &ecx, &edx); - - return ebx; -} - -static inline unsigned int cpuid_ecx(unsigned int op) -{ - unsigned int eax, ebx, ecx, edx; - - cpuid(op, &eax, &ebx, &ecx, &edx); - - return ecx; -} - -static inline unsigned int cpuid_edx(unsigned int op) -{ - unsigned int eax, ebx, ecx, edx; - - cpuid(op, &eax, &ebx, &ecx, &edx); - - return edx; -} - -/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ -static inline void rep_nop(void) -{ - asm volatile("rep; nop" ::: "memory"); -} - -static inline void cpu_relax(void) -{ - rep_nop(); -} - -/* Stop speculative execution: */ -static inline void sync_core(void) -{ - int tmp; - - asm volatile("cpuid" : "=a" (tmp) : "0" (1) - : "ebx", "ecx", "edx", "memory"); -} - -static inline void __monitor(const void *eax, unsigned long ecx, - unsigned long edx) -{ - /* "monitor %eax, %ecx, %edx;" */ - asm volatile(".byte 0x0f, 0x01, 0xc8;" - :: "a" (eax), "c" (ecx), "d"(edx)); -} - -static inline void __mwait(unsigned long eax, unsigned long ecx) -{ - /* "mwait %eax, %ecx;" */ - asm volatile(".byte 0x0f, 0x01, 0xc9;" - :: "a" (eax), "c" (ecx)); -} - -static inline void __sti_mwait(unsigned long eax, unsigned long ecx) -{ - trace_hardirqs_on(); - /* "mwait %eax, %ecx;" */ - asm volatile("sti; .byte 0x0f, 0x01, 0xc9;" - :: "a" (eax), "c" (ecx)); -} - -extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx); - -extern void select_idle_routine(const struct cpuinfo_x86 *c); - -extern unsigned long boot_option_idle_override; -extern unsigned long idle_halt; -extern unsigned long idle_nomwait; - -/* - * on systems with caches, caches must be flashed as the absolute - * last instruction before going into a suspended halt. Otherwise, - * dirty data can linger in the cache and become stale on resume, - * leading to strange errors. - * - * perform a variety of operations to guarantee that the compiler - * will not reorder instructions. wbinvd itself is serializing - * so the processor will not reorder. - * - * Systems without cache can just go into halt. - */ -static inline void wbinvd_halt(void) -{ - mb(); - /* check for clflush to determine if wbinvd is legal */ - if (cpu_has_clflush) - asm volatile("cli; wbinvd; 1: hlt; jmp 1b" : : : "memory"); - else - while (1) - halt(); -} - -extern void enable_sep_cpu(void); -extern int sysenter_setup(void); - -/* Defined in head.S */ -extern struct desc_ptr early_gdt_descr; - -extern void cpu_set_gdt(int); -extern void switch_to_new_gdt(void); -extern void cpu_init(void); -extern void init_gdt(int cpu); - -static inline void update_debugctlmsr(unsigned long debugctlmsr) -{ -#ifndef CONFIG_X86_DEBUGCTLMSR - if (boot_cpu_data.x86 < 6) - return; -#endif - wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); -} - -/* - * from system description table in BIOS. Mostly for MCA use, but - * others may find it useful: - */ -extern unsigned int machine_id; -extern unsigned int machine_submodel_id; -extern unsigned int BIOS_revision; - -/* Boot loader type from the setup header: */ -extern int bootloader_type; - -extern char ignore_fpu_irq; - -#define HAVE_ARCH_PICK_MMAP_LAYOUT 1 -#define ARCH_HAS_PREFETCHW -#define ARCH_HAS_SPINLOCK_PREFETCH - -#ifdef CONFIG_X86_32 -# define BASE_PREFETCH ASM_NOP4 -# define ARCH_HAS_PREFETCH -#else -# define BASE_PREFETCH "prefetcht0 (%1)" -#endif - -/* - * Prefetch instructions for Pentium III (+) and AMD Athlon (+) - * - * It's not worth to care about 3dnow prefetches for the K6 - * because they are microcoded there and very slow. - */ -static inline void prefetch(const void *x) -{ - alternative_input(BASE_PREFETCH, - "prefetchnta (%1)", - X86_FEATURE_XMM, - "r" (x)); -} - -/* - * 3dnow prefetch to get an exclusive cache line. - * Useful for spinlocks to avoid one state transition in the - * cache coherency protocol: - */ -static inline void prefetchw(const void *x) -{ - alternative_input(BASE_PREFETCH, - "prefetchw (%1)", - X86_FEATURE_3DNOW, - "r" (x)); -} - -static inline void spin_lock_prefetch(const void *x) -{ - prefetchw(x); -} - -#ifdef CONFIG_X86_32 -/* - * User space process size: 3GB (default). - */ -#define TASK_SIZE PAGE_OFFSET -#define STACK_TOP TASK_SIZE -#define STACK_TOP_MAX STACK_TOP - -#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 }, \ -} - -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) - -#else -/* - * User space process size. 47bits minus one guard page. - */ -#define TASK_SIZE64 ((1UL << 47) - PAGE_SIZE) - -/* 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) - -#define STACK_TOP TASK_SIZE -#define STACK_TOP_MAX TASK_SIZE64 - -#define INIT_THREAD { \ - .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ -} - -#define INIT_TSS { \ - .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ -} - -/* - * 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 /* CONFIG_X86_64 */ - -extern void start_thread(struct pt_regs *regs, unsigned long new_ip, - unsigned long new_sp); - -/* - * This decides where the kernel will search for a free chunk of vm - * space during mmap's. - */ -#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) - -#define KSTK_EIP(task) (task_pt_regs(task)->ip) - -/* Get/set a process' ability to use the timestamp counter instruction */ -#define GET_TSC_CTL(adr) get_tsc_mode((adr)) -#define SET_TSC_CTL(val) set_tsc_mode((val)) - -extern int get_tsc_mode(unsigned long adr); -extern int set_tsc_mode(unsigned int val); - -#endif |