H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_PROCESSOR_H |
| 2 | #define _ASM_X86_PROCESSOR_H |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 3 | |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 4 | #include <asm/processor-flags.h> |
| 5 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 6 | /* Forward declaration, a strange C thing */ |
| 7 | struct task_struct; |
| 8 | struct mm_struct; |
| 9 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 10 | #include <asm/vm86.h> |
| 11 | #include <asm/math_emu.h> |
| 12 | #include <asm/segment.h> |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 13 | #include <asm/types.h> |
| 14 | #include <asm/sigcontext.h> |
| 15 | #include <asm/current.h> |
| 16 | #include <asm/cpufeature.h> |
| 17 | #include <asm/system.h> |
Glauber de Oliveira Costa | c72dcf8 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 18 | #include <asm/page.h> |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 19 | #include <asm/percpu.h> |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 20 | #include <asm/msr.h> |
| 21 | #include <asm/desc_defs.h> |
Andi Kleen | bd61643 | 2008-01-30 13:32:38 +0100 | [diff] [blame] | 22 | #include <asm/nops.h> |
Markus Metzger | 93fa763 | 2008-04-08 11:01:58 +0200 | [diff] [blame] | 23 | #include <asm/ds.h> |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 24 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 25 | #include <linux/personality.h> |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 26 | #include <linux/cpumask.h> |
| 27 | #include <linux/cache.h> |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 28 | #include <linux/threads.h> |
| 29 | #include <linux/init.h> |
Glauber de Oliveira Costa | c72dcf8 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 30 | |
Glauber de Oliveira Costa | 0ccb8ac | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 31 | /* |
| 32 | * Default implementation of macro that returns current |
| 33 | * instruction pointer ("program counter"). |
| 34 | */ |
| 35 | static inline void *current_text_addr(void) |
| 36 | { |
| 37 | void *pc; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 38 | |
| 39 | asm volatile("mov $1f, %0; 1:":"=r" (pc)); |
| 40 | |
Glauber de Oliveira Costa | 0ccb8ac | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 41 | return pc; |
| 42 | } |
| 43 | |
Glauber de Oliveira Costa | dbcb466 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 44 | #ifdef CONFIG_X86_VSMP |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 45 | # define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT) |
| 46 | # define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT) |
Glauber de Oliveira Costa | dbcb466 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 47 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 48 | # define ARCH_MIN_TASKALIGN 16 |
| 49 | # define ARCH_MIN_MMSTRUCT_ALIGN 0 |
Glauber de Oliveira Costa | dbcb466 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 50 | #endif |
| 51 | |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 52 | /* |
| 53 | * CPU type and hardware bug flags. Kept separately for each CPU. |
| 54 | * Members of this structure are referenced in head.S, so think twice |
| 55 | * before touching them. [mj] |
| 56 | */ |
| 57 | |
| 58 | struct cpuinfo_x86 { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 59 | __u8 x86; /* CPU family */ |
| 60 | __u8 x86_vendor; /* CPU vendor */ |
| 61 | __u8 x86_model; |
| 62 | __u8 x86_mask; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 63 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 64 | char wp_works_ok; /* It doesn't on 386's */ |
| 65 | |
| 66 | /* Problems on some 486Dx4's and old 386's: */ |
| 67 | char hlt_works_ok; |
| 68 | char hard_math; |
| 69 | char rfu; |
| 70 | char fdiv_bug; |
| 71 | char f00f_bug; |
| 72 | char coma_bug; |
| 73 | char pad0; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 74 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 75 | /* Number of 4K pages in DTLB/ITLB combined(in pages): */ |
| 76 | int x86_tlbsize; |
| 77 | __u8 x86_virt_bits; |
| 78 | __u8 x86_phys_bits; |
Yinghai Lu | 11fdd25 | 2008-09-07 17:58:50 -0700 | [diff] [blame] | 79 | #endif |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 80 | /* CPUID returned core id bits: */ |
| 81 | __u8 x86_coreid_bits; |
| 82 | /* Max extended CPUID function supported: */ |
| 83 | __u32 extended_cpuid_level; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 84 | /* Maximum supported CPUID level, -1=no CPUID: */ |
| 85 | int cpuid_level; |
| 86 | __u32 x86_capability[NCAPINTS]; |
| 87 | char x86_vendor_id[16]; |
| 88 | char x86_model_id[64]; |
| 89 | /* in KB - valid for CPUS which support this call: */ |
| 90 | int x86_cache_size; |
| 91 | int x86_cache_alignment; /* In bytes */ |
| 92 | int x86_power; |
| 93 | unsigned long loops_per_jiffy; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 94 | #ifdef CONFIG_SMP |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 95 | /* cpus sharing the last level cache: */ |
| 96 | cpumask_t llc_shared_map; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 97 | #endif |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 98 | /* cpuid returned max cores value: */ |
| 99 | u16 x86_max_cores; |
| 100 | u16 apicid; |
Yinghai Lu | 01aaea1 | 2008-03-06 13:46:39 -0800 | [diff] [blame] | 101 | u16 initial_apicid; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 102 | u16 x86_clflush_size; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 103 | #ifdef CONFIG_SMP |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 104 | /* number of cores as seen by the OS: */ |
| 105 | u16 booted_cores; |
| 106 | /* Physical processor id: */ |
| 107 | u16 phys_proc_id; |
| 108 | /* Core id: */ |
| 109 | u16 cpu_core_id; |
| 110 | /* Index into per_cpu list: */ |
| 111 | u16 cpu_index; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 112 | #endif |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 113 | unsigned int x86_hyper_vendor; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 114 | } __attribute__((__aligned__(SMP_CACHE_BYTES))); |
| 115 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 116 | #define X86_VENDOR_INTEL 0 |
| 117 | #define X86_VENDOR_CYRIX 1 |
| 118 | #define X86_VENDOR_AMD 2 |
| 119 | #define X86_VENDOR_UMC 3 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 120 | #define X86_VENDOR_CENTAUR 5 |
| 121 | #define X86_VENDOR_TRANSMETA 7 |
| 122 | #define X86_VENDOR_NSC 8 |
| 123 | #define X86_VENDOR_NUM 9 |
| 124 | |
| 125 | #define X86_VENDOR_UNKNOWN 0xff |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 126 | |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 127 | #define X86_HYPER_VENDOR_NONE 0 |
| 128 | #define X86_HYPER_VENDOR_VMWARE 1 |
| 129 | |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 130 | /* |
| 131 | * capabilities of CPUs |
| 132 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 133 | extern struct cpuinfo_x86 boot_cpu_data; |
| 134 | extern struct cpuinfo_x86 new_cpu_data; |
| 135 | |
| 136 | extern struct tss_struct doublefault_tss; |
| 137 | extern __u32 cleared_cpu_caps[NCAPINTS]; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 138 | |
| 139 | #ifdef CONFIG_SMP |
| 140 | DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info); |
| 141 | #define cpu_data(cpu) per_cpu(cpu_info, cpu) |
Mike Travis | 94a1e86 | 2008-07-18 18:11:31 -0700 | [diff] [blame] | 142 | #define current_cpu_data __get_cpu_var(cpu_info) |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 143 | #else |
| 144 | #define cpu_data(cpu) boot_cpu_data |
| 145 | #define current_cpu_data boot_cpu_data |
| 146 | #endif |
| 147 | |
Jaswinder Singh | 1c6c727 | 2008-07-21 22:40:37 +0530 | [diff] [blame] | 148 | extern const struct seq_operations cpuinfo_op; |
| 149 | |
Glauber Costa | 3d3f487 | 2008-03-03 14:12:48 -0300 | [diff] [blame] | 150 | static inline int hlt_works(int cpu) |
| 151 | { |
| 152 | #ifdef CONFIG_X86_32 |
| 153 | return cpu_data(cpu).hlt_works_ok; |
| 154 | #else |
| 155 | return 1; |
| 156 | #endif |
| 157 | } |
| 158 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 159 | #define cache_line_size() (boot_cpu_data.x86_cache_alignment) |
| 160 | |
| 161 | extern void cpu_detect(struct cpuinfo_x86 *c); |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 162 | |
Jaswinder Singh | 8fd329a | 2008-07-21 22:54:56 +0530 | [diff] [blame] | 163 | extern struct pt_regs *idle_regs(struct pt_regs *); |
| 164 | |
Yinghai Lu | f580366 | 2008-06-21 03:24:19 -0700 | [diff] [blame] | 165 | extern void early_cpu_init(void); |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 166 | extern void identify_boot_cpu(void); |
| 167 | extern void identify_secondary_cpu(struct cpuinfo_x86 *); |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 168 | extern void print_cpu_info(struct cpuinfo_x86 *); |
| 169 | extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); |
| 170 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); |
| 171 | extern unsigned short num_cache_leaves; |
| 172 | |
Suresh Siddha | bbb65d2 | 2008-08-23 17:47:10 +0200 | [diff] [blame] | 173 | extern void detect_extended_topology(struct cpuinfo_x86 *c); |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 174 | extern void detect_ht(struct cpuinfo_x86 *c); |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 175 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 176 | static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 177 | unsigned int *ecx, unsigned int *edx) |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 178 | { |
| 179 | /* ecx is often an input as well as an output. */ |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 180 | asm("cpuid" |
| 181 | : "=a" (*eax), |
| 182 | "=b" (*ebx), |
| 183 | "=c" (*ecx), |
| 184 | "=d" (*edx) |
| 185 | : "0" (*eax), "2" (*ecx)); |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 186 | } |
| 187 | |
Glauber de Oliveira Costa | c72dcf8 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 188 | static inline void load_cr3(pgd_t *pgdir) |
| 189 | { |
| 190 | write_cr3(__pa(pgdir)); |
| 191 | } |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 192 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 193 | #ifdef CONFIG_X86_32 |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 194 | /* This is the TSS defined by the hardware. */ |
| 195 | struct x86_hw_tss { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 196 | unsigned short back_link, __blh; |
| 197 | unsigned long sp0; |
| 198 | unsigned short ss0, __ss0h; |
| 199 | unsigned long sp1; |
| 200 | /* ss1 caches MSR_IA32_SYSENTER_CS: */ |
| 201 | unsigned short ss1, __ss1h; |
| 202 | unsigned long sp2; |
| 203 | unsigned short ss2, __ss2h; |
| 204 | unsigned long __cr3; |
| 205 | unsigned long ip; |
| 206 | unsigned long flags; |
| 207 | unsigned long ax; |
| 208 | unsigned long cx; |
| 209 | unsigned long dx; |
| 210 | unsigned long bx; |
| 211 | unsigned long sp; |
| 212 | unsigned long bp; |
| 213 | unsigned long si; |
| 214 | unsigned long di; |
| 215 | unsigned short es, __esh; |
| 216 | unsigned short cs, __csh; |
| 217 | unsigned short ss, __ssh; |
| 218 | unsigned short ds, __dsh; |
| 219 | unsigned short fs, __fsh; |
| 220 | unsigned short gs, __gsh; |
| 221 | unsigned short ldt, __ldth; |
| 222 | unsigned short trace; |
| 223 | unsigned short io_bitmap_base; |
| 224 | |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 225 | } __attribute__((packed)); |
| 226 | #else |
| 227 | struct x86_hw_tss { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 228 | u32 reserved1; |
| 229 | u64 sp0; |
| 230 | u64 sp1; |
| 231 | u64 sp2; |
| 232 | u64 reserved2; |
| 233 | u64 ist[7]; |
| 234 | u32 reserved3; |
| 235 | u32 reserved4; |
| 236 | u16 reserved5; |
| 237 | u16 io_bitmap_base; |
| 238 | |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 239 | } __attribute__((packed)) ____cacheline_aligned; |
| 240 | #endif |
| 241 | |
| 242 | /* |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 243 | * IO-bitmap sizes: |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 244 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 245 | #define IO_BITMAP_BITS 65536 |
| 246 | #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) |
| 247 | #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) |
| 248 | #define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap) |
| 249 | #define INVALID_IO_BITMAP_OFFSET 0x8000 |
| 250 | #define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000 |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 251 | |
| 252 | struct tss_struct { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 253 | /* |
| 254 | * The hardware state: |
| 255 | */ |
| 256 | struct x86_hw_tss x86_tss; |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 257 | |
| 258 | /* |
| 259 | * The extra 1 is there because the CPU will access an |
| 260 | * additional byte beyond the end of the IO permission |
| 261 | * bitmap. The extra byte must be all 1 bits, and must |
| 262 | * be within the limit. |
| 263 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 264 | unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 265 | /* |
| 266 | * Cache the current maximum and the last task that used the bitmap: |
| 267 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 268 | unsigned long io_bitmap_max; |
| 269 | struct thread_struct *io_bitmap_owner; |
| 270 | |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 271 | /* |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 272 | * .. and then another 0x100 bytes for the emergency kernel stack: |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 273 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 274 | unsigned long stack[64]; |
| 275 | |
Richard Kennedy | 84e65b0 | 2008-07-04 13:56:16 +0100 | [diff] [blame] | 276 | } ____cacheline_aligned; |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 277 | |
| 278 | DECLARE_PER_CPU(struct tss_struct, init_tss); |
| 279 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 280 | /* |
| 281 | * Save the original ist values for checking stack pointers during debugging |
| 282 | */ |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 283 | struct orig_ist { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 284 | unsigned long ist[7]; |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 285 | }; |
| 286 | |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 287 | #define MXCSR_DEFAULT 0x1f80 |
| 288 | |
Glauber de Oliveira Costa | 46265df | 2008-01-30 13:31:41 +0100 | [diff] [blame] | 289 | struct i387_fsave_struct { |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 290 | u32 cwd; /* FPU Control Word */ |
| 291 | u32 swd; /* FPU Status Word */ |
| 292 | u32 twd; /* FPU Tag Word */ |
| 293 | u32 fip; /* FPU IP Offset */ |
| 294 | u32 fcs; /* FPU IP Selector */ |
| 295 | u32 foo; /* FPU Operand Pointer Offset */ |
| 296 | u32 fos; /* FPU Operand Pointer Selector */ |
| 297 | |
| 298 | /* 8*10 bytes for each FP-reg = 80 bytes: */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 299 | u32 st_space[20]; |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 300 | |
| 301 | /* Software status information [not touched by FSAVE ]: */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 302 | u32 status; |
Glauber de Oliveira Costa | 46265df | 2008-01-30 13:31:41 +0100 | [diff] [blame] | 303 | }; |
| 304 | |
| 305 | struct i387_fxsave_struct { |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 306 | u16 cwd; /* Control Word */ |
| 307 | u16 swd; /* Status Word */ |
| 308 | u16 twd; /* Tag Word */ |
| 309 | u16 fop; /* Last Instruction Opcode */ |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 310 | union { |
| 311 | struct { |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 312 | u64 rip; /* Instruction Pointer */ |
| 313 | u64 rdp; /* Data Pointer */ |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 314 | }; |
| 315 | struct { |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 316 | u32 fip; /* FPU IP Offset */ |
| 317 | u32 fcs; /* FPU IP Selector */ |
| 318 | u32 foo; /* FPU Operand Offset */ |
| 319 | u32 fos; /* FPU Operand Selector */ |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 320 | }; |
| 321 | }; |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 322 | u32 mxcsr; /* MXCSR Register State */ |
| 323 | u32 mxcsr_mask; /* MXCSR Mask */ |
| 324 | |
| 325 | /* 8*16 bytes for each FP-reg = 128 bytes: */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 326 | u32 st_space[32]; |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 327 | |
| 328 | /* 16*16 bytes for each XMM-reg = 256 bytes: */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 329 | u32 xmm_space[64]; |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 330 | |
Suresh Siddha | bdd8cab | 2008-07-29 10:29:24 -0700 | [diff] [blame] | 331 | u32 padding[12]; |
| 332 | |
| 333 | union { |
| 334 | u32 padding1[12]; |
| 335 | u32 sw_reserved[12]; |
| 336 | }; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 337 | |
Glauber de Oliveira Costa | 46265df | 2008-01-30 13:31:41 +0100 | [diff] [blame] | 338 | } __attribute__((aligned(16))); |
| 339 | |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 340 | struct i387_soft_struct { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 341 | u32 cwd; |
| 342 | u32 swd; |
| 343 | u32 twd; |
| 344 | u32 fip; |
| 345 | u32 fcs; |
| 346 | u32 foo; |
| 347 | u32 fos; |
| 348 | /* 8*10 bytes for each FP-reg = 80 bytes: */ |
| 349 | u32 st_space[20]; |
| 350 | u8 ftop; |
| 351 | u8 changed; |
| 352 | u8 lookahead; |
| 353 | u8 no_update; |
| 354 | u8 rm; |
| 355 | u8 alimit; |
| 356 | struct info *info; |
| 357 | u32 entry_eip; |
Glauber de Oliveira Costa | 46265df | 2008-01-30 13:31:41 +0100 | [diff] [blame] | 358 | }; |
| 359 | |
Suresh Siddha | dc1e35c | 2008-07-29 10:29:19 -0700 | [diff] [blame] | 360 | struct xsave_hdr_struct { |
| 361 | u64 xstate_bv; |
| 362 | u64 reserved1[2]; |
| 363 | u64 reserved2[5]; |
| 364 | } __attribute__((packed)); |
| 365 | |
| 366 | struct xsave_struct { |
| 367 | struct i387_fxsave_struct i387; |
| 368 | struct xsave_hdr_struct xsave_hdr; |
| 369 | /* new processor state extensions will go here */ |
| 370 | } __attribute__ ((packed, aligned (64))); |
| 371 | |
Suresh Siddha | 61c4628 | 2008-03-10 15:28:04 -0700 | [diff] [blame] | 372 | union thread_xstate { |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 373 | struct i387_fsave_struct fsave; |
| 374 | struct i387_fxsave_struct fxsave; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 375 | struct i387_soft_struct soft; |
Suresh Siddha | b359e8a | 2008-07-29 10:29:20 -0700 | [diff] [blame] | 376 | struct xsave_struct xsave; |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 377 | }; |
| 378 | |
Glauber Costa | fe67620 | 2008-03-03 14:12:56 -0300 | [diff] [blame] | 379 | #ifdef CONFIG_X86_64 |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 380 | DECLARE_PER_CPU(struct orig_ist, orig_ist); |
Brian Gerst | 26f80bd | 2009-01-19 00:38:58 +0900 | [diff] [blame] | 381 | |
Brian Gerst | 947e76c | 2009-01-19 12:21:28 +0900 | [diff] [blame] | 382 | union irq_stack_union { |
| 383 | char irq_stack[IRQ_STACK_SIZE]; |
| 384 | /* |
| 385 | * GCC hardcodes the stack canary as %gs:40. Since the |
| 386 | * irq_stack is the object at %gs:0, we reserve the bottom |
| 387 | * 48 bytes of the irq stack for the canary. |
| 388 | */ |
| 389 | struct { |
| 390 | char gs_base[40]; |
| 391 | unsigned long stack_canary; |
| 392 | }; |
| 393 | }; |
| 394 | |
| 395 | DECLARE_PER_CPU(union irq_stack_union, irq_stack_union); |
Brian Gerst | 2add8e2 | 2009-02-08 09:58:39 -0500 | [diff] [blame^] | 396 | DECLARE_INIT_PER_CPU(irq_stack_union); |
| 397 | |
Brian Gerst | 26f80bd | 2009-01-19 00:38:58 +0900 | [diff] [blame] | 398 | DECLARE_PER_CPU(char *, irq_stack_ptr); |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 399 | #endif |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 400 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 401 | extern void print_cpu_info(struct cpuinfo_x86 *); |
Suresh Siddha | 61c4628 | 2008-03-10 15:28:04 -0700 | [diff] [blame] | 402 | extern unsigned int xstate_size; |
Suresh Siddha | aa283f4 | 2008-03-10 15:28:05 -0700 | [diff] [blame] | 403 | extern void free_thread_xstate(struct task_struct *); |
| 404 | extern struct kmem_cache *task_xstate_cachep; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 405 | extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); |
| 406 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); |
| 407 | extern unsigned short num_cache_leaves; |
| 408 | |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 409 | struct thread_struct { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 410 | /* Cached TLS descriptors: */ |
| 411 | struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; |
| 412 | unsigned long sp0; |
| 413 | unsigned long sp; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 414 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 415 | unsigned long sysenter_cs; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 416 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 417 | unsigned long usersp; /* Copy from PDA */ |
| 418 | unsigned short es; |
| 419 | unsigned short ds; |
| 420 | unsigned short fsindex; |
| 421 | unsigned short gsindex; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 422 | #endif |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 423 | unsigned long ip; |
| 424 | unsigned long fs; |
| 425 | unsigned long gs; |
| 426 | /* Hardware debugging registers: */ |
| 427 | unsigned long debugreg0; |
| 428 | unsigned long debugreg1; |
| 429 | unsigned long debugreg2; |
| 430 | unsigned long debugreg3; |
| 431 | unsigned long debugreg6; |
| 432 | unsigned long debugreg7; |
| 433 | /* Fault info: */ |
| 434 | unsigned long cr2; |
| 435 | unsigned long trap_no; |
| 436 | unsigned long error_code; |
Suresh Siddha | 61c4628 | 2008-03-10 15:28:04 -0700 | [diff] [blame] | 437 | /* floating point and extended processor state */ |
| 438 | union thread_xstate *xstate; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 439 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 440 | /* Virtual 86 mode info */ |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 441 | struct vm86_struct __user *vm86_info; |
| 442 | unsigned long screen_bitmap; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 443 | unsigned long v86flags; |
| 444 | unsigned long v86mask; |
| 445 | unsigned long saved_sp0; |
| 446 | unsigned int saved_fs; |
| 447 | unsigned int saved_gs; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 448 | #endif |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 449 | /* IO permissions: */ |
| 450 | unsigned long *io_bitmap_ptr; |
| 451 | unsigned long iopl; |
| 452 | /* Max allowed port in the bitmap, in bytes: */ |
| 453 | unsigned io_bitmap_max; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 454 | /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */ |
| 455 | unsigned long debugctlmsr; |
Markus Metzger | 93fa763 | 2008-04-08 11:01:58 +0200 | [diff] [blame] | 456 | #ifdef CONFIG_X86_DS |
| 457 | /* Debug Store context; see include/asm-x86/ds.h; goes into MSR_IA32_DS_AREA */ |
| 458 | struct ds_context *ds_ctx; |
| 459 | #endif /* CONFIG_X86_DS */ |
| 460 | #ifdef CONFIG_X86_PTRACE_BTS |
| 461 | /* the signal to send on a bts buffer overflow */ |
| 462 | unsigned int bts_ovfl_signal; |
| 463 | #endif /* CONFIG_X86_PTRACE_BTS */ |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 464 | }; |
| 465 | |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 466 | static inline unsigned long native_get_debugreg(int regno) |
| 467 | { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 468 | unsigned long val = 0; /* Damn you, gcc! */ |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 469 | |
| 470 | switch (regno) { |
| 471 | case 0: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 472 | asm("mov %%db0, %0" :"=r" (val)); |
| 473 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 474 | case 1: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 475 | asm("mov %%db1, %0" :"=r" (val)); |
| 476 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 477 | case 2: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 478 | asm("mov %%db2, %0" :"=r" (val)); |
| 479 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 480 | case 3: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 481 | asm("mov %%db3, %0" :"=r" (val)); |
| 482 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 483 | case 6: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 484 | asm("mov %%db6, %0" :"=r" (val)); |
| 485 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 486 | case 7: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 487 | asm("mov %%db7, %0" :"=r" (val)); |
| 488 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 489 | default: |
| 490 | BUG(); |
| 491 | } |
| 492 | return val; |
| 493 | } |
| 494 | |
| 495 | static inline void native_set_debugreg(int regno, unsigned long value) |
| 496 | { |
| 497 | switch (regno) { |
| 498 | case 0: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 499 | asm("mov %0, %%db0" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 500 | break; |
| 501 | case 1: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 502 | asm("mov %0, %%db1" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 503 | break; |
| 504 | case 2: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 505 | asm("mov %0, %%db2" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 506 | break; |
| 507 | case 3: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 508 | asm("mov %0, %%db3" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 509 | break; |
| 510 | case 6: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 511 | asm("mov %0, %%db6" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 512 | break; |
| 513 | case 7: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 514 | asm("mov %0, %%db7" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 515 | break; |
| 516 | default: |
| 517 | BUG(); |
| 518 | } |
| 519 | } |
| 520 | |
Glauber de Oliveira Costa | 62d7d7e | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 521 | /* |
| 522 | * Set IOPL bits in EFLAGS from given mask |
| 523 | */ |
| 524 | static inline void native_set_iopl_mask(unsigned mask) |
| 525 | { |
| 526 | #ifdef CONFIG_X86_32 |
| 527 | unsigned int reg; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 528 | |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 529 | asm volatile ("pushfl;" |
| 530 | "popl %0;" |
| 531 | "andl %1, %0;" |
| 532 | "orl %2, %0;" |
| 533 | "pushl %0;" |
| 534 | "popfl" |
| 535 | : "=&r" (reg) |
| 536 | : "i" (~X86_EFLAGS_IOPL), "r" (mask)); |
Glauber de Oliveira Costa | 62d7d7e | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 537 | #endif |
| 538 | } |
| 539 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 540 | static inline void |
| 541 | native_load_sp0(struct tss_struct *tss, struct thread_struct *thread) |
Glauber de Oliveira Costa | 7818a1e | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 542 | { |
| 543 | tss->x86_tss.sp0 = thread->sp0; |
| 544 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 545 | /* Only happens when SEP is enabled, no need to test "SEP"arately: */ |
Glauber de Oliveira Costa | 7818a1e | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 546 | if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { |
| 547 | tss->x86_tss.ss1 = thread->sysenter_cs; |
| 548 | wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); |
| 549 | } |
| 550 | #endif |
| 551 | } |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 552 | |
Glauber de Oliveira Costa | e801f86 | 2008-01-30 13:32:08 +0100 | [diff] [blame] | 553 | static inline void native_swapgs(void) |
| 554 | { |
| 555 | #ifdef CONFIG_X86_64 |
| 556 | asm volatile("swapgs" ::: "memory"); |
| 557 | #endif |
| 558 | } |
| 559 | |
Glauber de Oliveira Costa | 7818a1e | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 560 | #ifdef CONFIG_PARAVIRT |
| 561 | #include <asm/paravirt.h> |
| 562 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 563 | #define __cpuid native_cpuid |
| 564 | #define paravirt_enabled() 0 |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 565 | |
| 566 | /* |
| 567 | * These special macros can be used to get or set a debugging register |
| 568 | */ |
| 569 | #define get_debugreg(var, register) \ |
| 570 | (var) = native_get_debugreg(register) |
| 571 | #define set_debugreg(value, register) \ |
| 572 | native_set_debugreg(register, value) |
| 573 | |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 574 | static inline void load_sp0(struct tss_struct *tss, |
| 575 | struct thread_struct *thread) |
Glauber de Oliveira Costa | 7818a1e | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 576 | { |
| 577 | native_load_sp0(tss, thread); |
| 578 | } |
| 579 | |
Glauber de Oliveira Costa | 62d7d7e | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 580 | #define set_iopl_mask native_set_iopl_mask |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 581 | #endif /* CONFIG_PARAVIRT */ |
| 582 | |
| 583 | /* |
| 584 | * Save the cr4 feature set we're using (ie |
| 585 | * Pentium 4MB enable and PPro Global page |
| 586 | * enable), so that any CPU's that boot up |
| 587 | * after us can get the correct flags. |
| 588 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 589 | extern unsigned long mmu_cr4_features; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 590 | |
| 591 | static inline void set_in_cr4(unsigned long mask) |
| 592 | { |
| 593 | unsigned cr4; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 594 | |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 595 | mmu_cr4_features |= mask; |
| 596 | cr4 = read_cr4(); |
| 597 | cr4 |= mask; |
| 598 | write_cr4(cr4); |
| 599 | } |
| 600 | |
| 601 | static inline void clear_in_cr4(unsigned long mask) |
| 602 | { |
| 603 | unsigned cr4; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 604 | |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 605 | mmu_cr4_features &= ~mask; |
| 606 | cr4 = read_cr4(); |
| 607 | cr4 &= ~mask; |
| 608 | write_cr4(cr4); |
| 609 | } |
| 610 | |
Glauber de Oliveira Costa | fc87e90 | 2008-01-30 13:31:38 +0100 | [diff] [blame] | 611 | typedef struct { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 612 | unsigned long seg; |
Glauber de Oliveira Costa | fc87e90 | 2008-01-30 13:31:38 +0100 | [diff] [blame] | 613 | } mm_segment_t; |
| 614 | |
| 615 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 616 | /* |
| 617 | * create a kernel thread without removing it from tasklists |
| 618 | */ |
| 619 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); |
| 620 | |
| 621 | /* Free all resources held by a thread. */ |
| 622 | extern void release_thread(struct task_struct *); |
| 623 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 624 | /* Prepare to copy thread state - unlazy all lazy state */ |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 625 | extern void prepare_to_copy(struct task_struct *tsk); |
| 626 | |
| 627 | unsigned long get_wchan(struct task_struct *p); |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 628 | |
| 629 | /* |
| 630 | * Generic CPUID function |
| 631 | * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx |
| 632 | * resulting in stale register contents being returned. |
| 633 | */ |
| 634 | static inline void cpuid(unsigned int op, |
| 635 | unsigned int *eax, unsigned int *ebx, |
| 636 | unsigned int *ecx, unsigned int *edx) |
| 637 | { |
| 638 | *eax = op; |
| 639 | *ecx = 0; |
| 640 | __cpuid(eax, ebx, ecx, edx); |
| 641 | } |
| 642 | |
| 643 | /* Some CPUID calls want 'count' to be placed in ecx */ |
| 644 | static inline void cpuid_count(unsigned int op, int count, |
| 645 | unsigned int *eax, unsigned int *ebx, |
| 646 | unsigned int *ecx, unsigned int *edx) |
| 647 | { |
| 648 | *eax = op; |
| 649 | *ecx = count; |
| 650 | __cpuid(eax, ebx, ecx, edx); |
| 651 | } |
| 652 | |
| 653 | /* |
| 654 | * CPUID functions returning a single datum |
| 655 | */ |
| 656 | static inline unsigned int cpuid_eax(unsigned int op) |
| 657 | { |
| 658 | unsigned int eax, ebx, ecx, edx; |
| 659 | |
| 660 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 661 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 662 | return eax; |
| 663 | } |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 664 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 665 | static inline unsigned int cpuid_ebx(unsigned int op) |
| 666 | { |
| 667 | unsigned int eax, ebx, ecx, edx; |
| 668 | |
| 669 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 670 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 671 | return ebx; |
| 672 | } |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 673 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 674 | static inline unsigned int cpuid_ecx(unsigned int op) |
| 675 | { |
| 676 | unsigned int eax, ebx, ecx, edx; |
| 677 | |
| 678 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 679 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 680 | return ecx; |
| 681 | } |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 682 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 683 | static inline unsigned int cpuid_edx(unsigned int op) |
| 684 | { |
| 685 | unsigned int eax, ebx, ecx, edx; |
| 686 | |
| 687 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 688 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 689 | return edx; |
| 690 | } |
| 691 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 692 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ |
| 693 | static inline void rep_nop(void) |
| 694 | { |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 695 | asm volatile("rep; nop" ::: "memory"); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 696 | } |
| 697 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 698 | static inline void cpu_relax(void) |
| 699 | { |
| 700 | rep_nop(); |
| 701 | } |
| 702 | |
| 703 | /* Stop speculative execution: */ |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 704 | static inline void sync_core(void) |
| 705 | { |
| 706 | int tmp; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 707 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 708 | asm volatile("cpuid" : "=a" (tmp) : "0" (1) |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 709 | : "ebx", "ecx", "edx", "memory"); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 710 | } |
| 711 | |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 712 | static inline void __monitor(const void *eax, unsigned long ecx, |
| 713 | unsigned long edx) |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 714 | { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 715 | /* "monitor %eax, %ecx, %edx;" */ |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 716 | asm volatile(".byte 0x0f, 0x01, 0xc8;" |
| 717 | :: "a" (eax), "c" (ecx), "d"(edx)); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | static inline void __mwait(unsigned long eax, unsigned long ecx) |
| 721 | { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 722 | /* "mwait %eax, %ecx;" */ |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 723 | asm volatile(".byte 0x0f, 0x01, 0xc9;" |
| 724 | :: "a" (eax), "c" (ecx)); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | static inline void __sti_mwait(unsigned long eax, unsigned long ecx) |
| 728 | { |
Peter Zijlstra | 7f424a8 | 2008-04-25 17:39:01 +0200 | [diff] [blame] | 729 | trace_hardirqs_on(); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 730 | /* "mwait %eax, %ecx;" */ |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 731 | asm volatile("sti; .byte 0x0f, 0x01, 0xc9;" |
| 732 | :: "a" (eax), "c" (ecx)); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx); |
| 736 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 737 | extern void select_idle_routine(const struct cpuinfo_x86 *c); |
| 738 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 739 | extern unsigned long boot_option_idle_override; |
Zhao Yakui | c1e3b37 | 2008-06-24 17:58:53 +0800 | [diff] [blame] | 740 | extern unsigned long idle_halt; |
Zhao Yakui | da5e09a | 2008-06-24 18:01:09 +0800 | [diff] [blame] | 741 | extern unsigned long idle_nomwait; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 742 | |
Mark Langsdorf | 394a150 | 2008-08-14 09:11:26 -0500 | [diff] [blame] | 743 | /* |
| 744 | * on systems with caches, caches must be flashed as the absolute |
| 745 | * last instruction before going into a suspended halt. Otherwise, |
| 746 | * dirty data can linger in the cache and become stale on resume, |
| 747 | * leading to strange errors. |
| 748 | * |
| 749 | * perform a variety of operations to guarantee that the compiler |
| 750 | * will not reorder instructions. wbinvd itself is serializing |
| 751 | * so the processor will not reorder. |
| 752 | * |
| 753 | * Systems without cache can just go into halt. |
| 754 | */ |
| 755 | static inline void wbinvd_halt(void) |
| 756 | { |
| 757 | mb(); |
| 758 | /* check for clflush to determine if wbinvd is legal */ |
| 759 | if (cpu_has_clflush) |
| 760 | asm volatile("cli; wbinvd; 1: hlt; jmp 1b" : : : "memory"); |
| 761 | else |
| 762 | while (1) |
| 763 | halt(); |
| 764 | } |
| 765 | |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 766 | extern void enable_sep_cpu(void); |
| 767 | extern int sysenter_setup(void); |
| 768 | |
| 769 | /* Defined in head.S */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 770 | extern struct desc_ptr early_gdt_descr; |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 771 | |
| 772 | extern void cpu_set_gdt(int); |
Brian Gerst | 552be87 | 2009-01-30 17:47:53 +0900 | [diff] [blame] | 773 | extern void switch_to_new_gdt(int); |
Jeremy Fitzhardinge | 11e3a84 | 2009-01-30 17:47:54 +0900 | [diff] [blame] | 774 | extern void load_percpu_segment(int); |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 775 | extern void cpu_init(void); |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 776 | |
Markus Metzger | c272477 | 2008-12-11 13:49:59 +0100 | [diff] [blame] | 777 | static inline unsigned long get_debugctlmsr(void) |
| 778 | { |
| 779 | unsigned long debugctlmsr = 0; |
| 780 | |
| 781 | #ifndef CONFIG_X86_DEBUGCTLMSR |
| 782 | if (boot_cpu_data.x86 < 6) |
| 783 | return 0; |
| 784 | #endif |
| 785 | rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); |
| 786 | |
| 787 | return debugctlmsr; |
| 788 | } |
| 789 | |
Jan Beulich | 5b0e508 | 2008-03-10 13:11:17 +0000 | [diff] [blame] | 790 | static inline void update_debugctlmsr(unsigned long debugctlmsr) |
| 791 | { |
| 792 | #ifndef CONFIG_X86_DEBUGCTLMSR |
| 793 | if (boot_cpu_data.x86 < 6) |
| 794 | return; |
| 795 | #endif |
| 796 | wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); |
| 797 | } |
| 798 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 799 | /* |
| 800 | * from system description table in BIOS. Mostly for MCA use, but |
| 801 | * others may find it useful: |
| 802 | */ |
| 803 | extern unsigned int machine_id; |
| 804 | extern unsigned int machine_submodel_id; |
| 805 | extern unsigned int BIOS_revision; |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 806 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 807 | /* Boot loader type from the setup header: */ |
| 808 | extern int bootloader_type; |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 809 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 810 | extern char ignore_fpu_irq; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 811 | |
| 812 | #define HAVE_ARCH_PICK_MMAP_LAYOUT 1 |
| 813 | #define ARCH_HAS_PREFETCHW |
| 814 | #define ARCH_HAS_SPINLOCK_PREFETCH |
| 815 | |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 816 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 817 | # define BASE_PREFETCH ASM_NOP4 |
| 818 | # define ARCH_HAS_PREFETCH |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 819 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 820 | # define BASE_PREFETCH "prefetcht0 (%1)" |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 821 | #endif |
| 822 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 823 | /* |
| 824 | * Prefetch instructions for Pentium III (+) and AMD Athlon (+) |
| 825 | * |
| 826 | * It's not worth to care about 3dnow prefetches for the K6 |
| 827 | * because they are microcoded there and very slow. |
| 828 | */ |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 829 | static inline void prefetch(const void *x) |
| 830 | { |
| 831 | alternative_input(BASE_PREFETCH, |
| 832 | "prefetchnta (%1)", |
| 833 | X86_FEATURE_XMM, |
| 834 | "r" (x)); |
| 835 | } |
| 836 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 837 | /* |
| 838 | * 3dnow prefetch to get an exclusive cache line. |
| 839 | * Useful for spinlocks to avoid one state transition in the |
| 840 | * cache coherency protocol: |
| 841 | */ |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 842 | static inline void prefetchw(const void *x) |
| 843 | { |
| 844 | alternative_input(BASE_PREFETCH, |
| 845 | "prefetchw (%1)", |
| 846 | X86_FEATURE_3DNOW, |
| 847 | "r" (x)); |
| 848 | } |
| 849 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 850 | static inline void spin_lock_prefetch(const void *x) |
| 851 | { |
| 852 | prefetchw(x); |
| 853 | } |
| 854 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 855 | #ifdef CONFIG_X86_32 |
| 856 | /* |
| 857 | * User space process size: 3GB (default). |
| 858 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 859 | #define TASK_SIZE PAGE_OFFSET |
| 860 | #define STACK_TOP TASK_SIZE |
| 861 | #define STACK_TOP_MAX STACK_TOP |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 862 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 863 | #define INIT_THREAD { \ |
| 864 | .sp0 = sizeof(init_stack) + (long)&init_stack, \ |
| 865 | .vm86_info = NULL, \ |
| 866 | .sysenter_cs = __KERNEL_CS, \ |
| 867 | .io_bitmap_ptr = NULL, \ |
| 868 | .fs = __KERNEL_PERCPU, \ |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | /* |
| 872 | * Note that the .io_bitmap member must be extra-big. This is because |
| 873 | * the CPU will access an additional byte beyond the end of the IO |
| 874 | * permission bitmap. The extra byte must be all 1 bits, and must |
| 875 | * be within the limit. |
| 876 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 877 | #define INIT_TSS { \ |
| 878 | .x86_tss = { \ |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 879 | .sp0 = sizeof(init_stack) + (long)&init_stack, \ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 880 | .ss0 = __KERNEL_DS, \ |
| 881 | .ss1 = __KERNEL_CS, \ |
| 882 | .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ |
| 883 | }, \ |
| 884 | .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 885 | } |
| 886 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 887 | extern unsigned long thread_saved_pc(struct task_struct *tsk); |
| 888 | |
| 889 | #define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long)) |
| 890 | #define KSTK_TOP(info) \ |
| 891 | ({ \ |
| 892 | unsigned long *__ptr = (unsigned long *)(info); \ |
| 893 | (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \ |
| 894 | }) |
| 895 | |
| 896 | /* |
| 897 | * The below -8 is to reserve 8 bytes on top of the ring0 stack. |
| 898 | * This is necessary to guarantee that the entire "struct pt_regs" |
| 899 | * is accessable even if the CPU haven't stored the SS/ESP registers |
| 900 | * on the stack (interrupt gate does not save these registers |
| 901 | * when switching to the same priv ring). |
| 902 | * Therefore beware: accessing the ss/esp fields of the |
| 903 | * "struct pt_regs" is possible, but they may contain the |
| 904 | * completely wrong values. |
| 905 | */ |
| 906 | #define task_pt_regs(task) \ |
| 907 | ({ \ |
| 908 | struct pt_regs *__regs__; \ |
| 909 | __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \ |
| 910 | __regs__ - 1; \ |
| 911 | }) |
| 912 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 913 | #define KSTK_ESP(task) (task_pt_regs(task)->sp) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 914 | |
| 915 | #else |
| 916 | /* |
| 917 | * User space process size. 47bits minus one guard page. |
| 918 | */ |
Cyrill Gorcunov | a5ae1c3 | 2008-03-13 19:44:56 +0300 | [diff] [blame] | 919 | #define TASK_SIZE64 ((1UL << 47) - PAGE_SIZE) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 920 | |
| 921 | /* This decides where the kernel will search for a free chunk of vm |
| 922 | * space during mmap's. |
| 923 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 924 | #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \ |
| 925 | 0xc0000000 : 0xFFFFe000) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 926 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 927 | #define TASK_SIZE (test_thread_flag(TIF_IA32) ? \ |
| 928 | IA32_PAGE_OFFSET : TASK_SIZE64) |
| 929 | #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \ |
| 930 | IA32_PAGE_OFFSET : TASK_SIZE64) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 931 | |
David Howells | 922a70d | 2008-02-08 04:19:26 -0800 | [diff] [blame] | 932 | #define STACK_TOP TASK_SIZE |
| 933 | #define STACK_TOP_MAX TASK_SIZE64 |
| 934 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 935 | #define INIT_THREAD { \ |
| 936 | .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ |
| 937 | } |
| 938 | |
| 939 | #define INIT_TSS { \ |
| 940 | .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ |
| 941 | } |
| 942 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 943 | /* |
| 944 | * Return saved PC of a blocked thread. |
| 945 | * What is this good for? it will be always the scheduler or ret_from_fork. |
| 946 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 947 | #define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8)) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 948 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 949 | #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1) |
| 950 | #define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */ |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 951 | #endif /* CONFIG_X86_64 */ |
| 952 | |
Ingo Molnar | 513ad84 | 2008-02-21 05:18:40 +0100 | [diff] [blame] | 953 | extern void start_thread(struct pt_regs *regs, unsigned long new_ip, |
| 954 | unsigned long new_sp); |
| 955 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 956 | /* |
| 957 | * This decides where the kernel will search for a free chunk of vm |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 958 | * space during mmap's. |
| 959 | */ |
| 960 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) |
| 961 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 962 | #define KSTK_EIP(task) (task_pt_regs(task)->ip) |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 963 | |
Erik Bosman | 529e25f | 2008-04-14 00:24:18 +0200 | [diff] [blame] | 964 | /* Get/set a process' ability to use the timestamp counter instruction */ |
| 965 | #define GET_TSC_CTL(adr) get_tsc_mode((adr)) |
| 966 | #define SET_TSC_CTL(val) set_tsc_mode((val)) |
| 967 | |
| 968 | extern int get_tsc_mode(unsigned long adr); |
| 969 | extern int set_tsc_mode(unsigned int val); |
| 970 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 971 | #endif /* _ASM_X86_PROCESSOR_H */ |