Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1 | #ifndef __ASM_X86_PROCESSOR_H |
| 2 | #define __ASM_X86_PROCESSOR_H |
| 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> |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 23 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 24 | #include <linux/personality.h> |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 25 | #include <linux/cpumask.h> |
| 26 | #include <linux/cache.h> |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 27 | #include <linux/threads.h> |
| 28 | #include <linux/init.h> |
Glauber de Oliveira Costa | c72dcf8 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 29 | |
Glauber de Oliveira Costa | 0ccb8ac | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 30 | /* |
| 31 | * Default implementation of macro that returns current |
| 32 | * instruction pointer ("program counter"). |
| 33 | */ |
| 34 | static inline void *current_text_addr(void) |
| 35 | { |
| 36 | void *pc; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 37 | |
| 38 | asm volatile("mov $1f, %0; 1:":"=r" (pc)); |
| 39 | |
Glauber de Oliveira Costa | 0ccb8ac | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 40 | return pc; |
| 41 | } |
| 42 | |
Glauber de Oliveira Costa | dbcb466 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 43 | #ifdef CONFIG_X86_VSMP |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 44 | # define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT) |
| 45 | # define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT) |
Glauber de Oliveira Costa | dbcb466 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 46 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 47 | # define ARCH_MIN_TASKALIGN 16 |
| 48 | # define ARCH_MIN_MMSTRUCT_ALIGN 0 |
Glauber de Oliveira Costa | dbcb466 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 49 | #endif |
| 50 | |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 51 | /* |
| 52 | * CPU type and hardware bug flags. Kept separately for each CPU. |
| 53 | * Members of this structure are referenced in head.S, so think twice |
| 54 | * before touching them. [mj] |
| 55 | */ |
| 56 | |
| 57 | struct cpuinfo_x86 { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 58 | __u8 x86; /* CPU family */ |
| 59 | __u8 x86_vendor; /* CPU vendor */ |
| 60 | __u8 x86_model; |
| 61 | __u8 x86_mask; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 62 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 63 | char wp_works_ok; /* It doesn't on 386's */ |
| 64 | |
| 65 | /* Problems on some 486Dx4's and old 386's: */ |
| 66 | char hlt_works_ok; |
| 67 | char hard_math; |
| 68 | char rfu; |
| 69 | char fdiv_bug; |
| 70 | char f00f_bug; |
| 71 | char coma_bug; |
| 72 | char pad0; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 73 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 74 | /* Number of 4K pages in DTLB/ITLB combined(in pages): */ |
| 75 | int x86_tlbsize; |
| 76 | __u8 x86_virt_bits; |
| 77 | __u8 x86_phys_bits; |
| 78 | /* CPUID returned core id bits: */ |
| 79 | __u8 x86_coreid_bits; |
| 80 | /* Max extended CPUID function supported: */ |
| 81 | __u32 extended_cpuid_level; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 82 | #endif |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 83 | /* Maximum supported CPUID level, -1=no CPUID: */ |
| 84 | int cpuid_level; |
| 85 | __u32 x86_capability[NCAPINTS]; |
| 86 | char x86_vendor_id[16]; |
| 87 | char x86_model_id[64]; |
| 88 | /* in KB - valid for CPUS which support this call: */ |
| 89 | int x86_cache_size; |
| 90 | int x86_cache_alignment; /* In bytes */ |
| 91 | int x86_power; |
| 92 | unsigned long loops_per_jiffy; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 93 | #ifdef CONFIG_SMP |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 94 | /* cpus sharing the last level cache: */ |
| 95 | cpumask_t llc_shared_map; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 96 | #endif |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 97 | /* cpuid returned max cores value: */ |
| 98 | u16 x86_max_cores; |
| 99 | u16 apicid; |
Yinghai Lu | 01aaea1 | 2008-03-06 13:46:39 -0800 | [diff] [blame] | 100 | u16 initial_apicid; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 101 | u16 x86_clflush_size; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 102 | #ifdef CONFIG_SMP |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 103 | /* number of cores as seen by the OS: */ |
| 104 | u16 booted_cores; |
| 105 | /* Physical processor id: */ |
| 106 | u16 phys_proc_id; |
| 107 | /* Core id: */ |
| 108 | u16 cpu_core_id; |
| 109 | /* Index into per_cpu list: */ |
| 110 | u16 cpu_index; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 111 | #endif |
| 112 | } __attribute__((__aligned__(SMP_CACHE_BYTES))); |
| 113 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 114 | #define X86_VENDOR_INTEL 0 |
| 115 | #define X86_VENDOR_CYRIX 1 |
| 116 | #define X86_VENDOR_AMD 2 |
| 117 | #define X86_VENDOR_UMC 3 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 118 | #define X86_VENDOR_CENTAUR 5 |
| 119 | #define X86_VENDOR_TRANSMETA 7 |
| 120 | #define X86_VENDOR_NSC 8 |
| 121 | #define X86_VENDOR_NUM 9 |
| 122 | |
| 123 | #define X86_VENDOR_UNKNOWN 0xff |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 124 | |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 125 | /* |
| 126 | * capabilities of CPUs |
| 127 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 128 | extern struct cpuinfo_x86 boot_cpu_data; |
| 129 | extern struct cpuinfo_x86 new_cpu_data; |
| 130 | |
| 131 | extern struct tss_struct doublefault_tss; |
| 132 | extern __u32 cleared_cpu_caps[NCAPINTS]; |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 133 | |
| 134 | #ifdef CONFIG_SMP |
| 135 | DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info); |
| 136 | #define cpu_data(cpu) per_cpu(cpu_info, cpu) |
Mike Travis | 94a1e86 | 2008-07-18 18:11:31 -0700 | [diff] [blame^] | 137 | #define current_cpu_data __get_cpu_var(cpu_info) |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 138 | #else |
| 139 | #define cpu_data(cpu) boot_cpu_data |
| 140 | #define current_cpu_data boot_cpu_data |
| 141 | #endif |
| 142 | |
Glauber Costa | 3d3f487 | 2008-03-03 14:12:48 -0300 | [diff] [blame] | 143 | static inline int hlt_works(int cpu) |
| 144 | { |
| 145 | #ifdef CONFIG_X86_32 |
| 146 | return cpu_data(cpu).hlt_works_ok; |
| 147 | #else |
| 148 | return 1; |
| 149 | #endif |
| 150 | } |
| 151 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 152 | #define cache_line_size() (boot_cpu_data.x86_cache_alignment) |
| 153 | |
| 154 | extern void cpu_detect(struct cpuinfo_x86 *c); |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 155 | |
Yinghai Lu | f580366 | 2008-06-21 03:24:19 -0700 | [diff] [blame] | 156 | extern void early_cpu_init(void); |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 157 | extern void identify_boot_cpu(void); |
| 158 | extern void identify_secondary_cpu(struct cpuinfo_x86 *); |
Glauber de Oliveira Costa | 5300db8 | 2008-01-30 13:31:33 +0100 | [diff] [blame] | 159 | extern void print_cpu_info(struct cpuinfo_x86 *); |
| 160 | extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); |
| 161 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); |
| 162 | extern unsigned short num_cache_leaves; |
| 163 | |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 164 | #if defined(CONFIG_X86_HT) || defined(CONFIG_X86_64) |
| 165 | extern void detect_ht(struct cpuinfo_x86 *c); |
| 166 | #else |
| 167 | static inline void detect_ht(struct cpuinfo_x86 *c) {} |
| 168 | #endif |
| 169 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 170 | static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 171 | unsigned int *ecx, unsigned int *edx) |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 172 | { |
| 173 | /* ecx is often an input as well as an output. */ |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 174 | asm("cpuid" |
| 175 | : "=a" (*eax), |
| 176 | "=b" (*ebx), |
| 177 | "=c" (*ecx), |
| 178 | "=d" (*edx) |
| 179 | : "0" (*eax), "2" (*ecx)); |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 180 | } |
| 181 | |
Glauber de Oliveira Costa | c72dcf8 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 182 | static inline void load_cr3(pgd_t *pgdir) |
| 183 | { |
| 184 | write_cr3(__pa(pgdir)); |
| 185 | } |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 186 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 187 | #ifdef CONFIG_X86_32 |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 188 | /* This is the TSS defined by the hardware. */ |
| 189 | struct x86_hw_tss { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 190 | unsigned short back_link, __blh; |
| 191 | unsigned long sp0; |
| 192 | unsigned short ss0, __ss0h; |
| 193 | unsigned long sp1; |
| 194 | /* ss1 caches MSR_IA32_SYSENTER_CS: */ |
| 195 | unsigned short ss1, __ss1h; |
| 196 | unsigned long sp2; |
| 197 | unsigned short ss2, __ss2h; |
| 198 | unsigned long __cr3; |
| 199 | unsigned long ip; |
| 200 | unsigned long flags; |
| 201 | unsigned long ax; |
| 202 | unsigned long cx; |
| 203 | unsigned long dx; |
| 204 | unsigned long bx; |
| 205 | unsigned long sp; |
| 206 | unsigned long bp; |
| 207 | unsigned long si; |
| 208 | unsigned long di; |
| 209 | unsigned short es, __esh; |
| 210 | unsigned short cs, __csh; |
| 211 | unsigned short ss, __ssh; |
| 212 | unsigned short ds, __dsh; |
| 213 | unsigned short fs, __fsh; |
| 214 | unsigned short gs, __gsh; |
| 215 | unsigned short ldt, __ldth; |
| 216 | unsigned short trace; |
| 217 | unsigned short io_bitmap_base; |
| 218 | |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 219 | } __attribute__((packed)); |
| 220 | #else |
| 221 | struct x86_hw_tss { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 222 | u32 reserved1; |
| 223 | u64 sp0; |
| 224 | u64 sp1; |
| 225 | u64 sp2; |
| 226 | u64 reserved2; |
| 227 | u64 ist[7]; |
| 228 | u32 reserved3; |
| 229 | u32 reserved4; |
| 230 | u16 reserved5; |
| 231 | u16 io_bitmap_base; |
| 232 | |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 233 | } __attribute__((packed)) ____cacheline_aligned; |
| 234 | #endif |
| 235 | |
| 236 | /* |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 237 | * IO-bitmap sizes: |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 238 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 239 | #define IO_BITMAP_BITS 65536 |
| 240 | #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) |
| 241 | #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) |
| 242 | #define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap) |
| 243 | #define INVALID_IO_BITMAP_OFFSET 0x8000 |
| 244 | #define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000 |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 245 | |
| 246 | struct tss_struct { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 247 | /* |
| 248 | * The hardware state: |
| 249 | */ |
| 250 | struct x86_hw_tss x86_tss; |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 251 | |
| 252 | /* |
| 253 | * The extra 1 is there because the CPU will access an |
| 254 | * additional byte beyond the end of the IO permission |
| 255 | * bitmap. The extra byte must be all 1 bits, and must |
| 256 | * be within the limit. |
| 257 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 258 | unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 259 | /* |
| 260 | * Cache the current maximum and the last task that used the bitmap: |
| 261 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 262 | unsigned long io_bitmap_max; |
| 263 | struct thread_struct *io_bitmap_owner; |
| 264 | |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 265 | /* |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 266 | * .. and then another 0x100 bytes for the emergency kernel stack: |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 267 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 268 | unsigned long stack[64]; |
| 269 | |
Richard Kennedy | 84e65b0 | 2008-07-04 13:56:16 +0100 | [diff] [blame] | 270 | } ____cacheline_aligned; |
Glauber de Oliveira Costa | ca241c7 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 271 | |
| 272 | DECLARE_PER_CPU(struct tss_struct, init_tss); |
| 273 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 274 | /* |
| 275 | * Save the original ist values for checking stack pointers during debugging |
| 276 | */ |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 277 | struct orig_ist { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 278 | unsigned long ist[7]; |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 279 | }; |
| 280 | |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 281 | #define MXCSR_DEFAULT 0x1f80 |
| 282 | |
Glauber de Oliveira Costa | 46265df | 2008-01-30 13:31:41 +0100 | [diff] [blame] | 283 | struct i387_fsave_struct { |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 284 | u32 cwd; /* FPU Control Word */ |
| 285 | u32 swd; /* FPU Status Word */ |
| 286 | u32 twd; /* FPU Tag Word */ |
| 287 | u32 fip; /* FPU IP Offset */ |
| 288 | u32 fcs; /* FPU IP Selector */ |
| 289 | u32 foo; /* FPU Operand Pointer Offset */ |
| 290 | u32 fos; /* FPU Operand Pointer Selector */ |
| 291 | |
| 292 | /* 8*10 bytes for each FP-reg = 80 bytes: */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 293 | u32 st_space[20]; |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 294 | |
| 295 | /* Software status information [not touched by FSAVE ]: */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 296 | u32 status; |
Glauber de Oliveira Costa | 46265df | 2008-01-30 13:31:41 +0100 | [diff] [blame] | 297 | }; |
| 298 | |
| 299 | struct i387_fxsave_struct { |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 300 | u16 cwd; /* Control Word */ |
| 301 | u16 swd; /* Status Word */ |
| 302 | u16 twd; /* Tag Word */ |
| 303 | u16 fop; /* Last Instruction Opcode */ |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 304 | union { |
| 305 | struct { |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 306 | u64 rip; /* Instruction Pointer */ |
| 307 | u64 rdp; /* Data Pointer */ |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 308 | }; |
| 309 | struct { |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 310 | u32 fip; /* FPU IP Offset */ |
| 311 | u32 fcs; /* FPU IP Selector */ |
| 312 | u32 foo; /* FPU Operand Offset */ |
| 313 | u32 fos; /* FPU Operand Selector */ |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 314 | }; |
| 315 | }; |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 316 | u32 mxcsr; /* MXCSR Register State */ |
| 317 | u32 mxcsr_mask; /* MXCSR Mask */ |
| 318 | |
| 319 | /* 8*16 bytes for each FP-reg = 128 bytes: */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 320 | u32 st_space[32]; |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 321 | |
| 322 | /* 16*16 bytes for each XMM-reg = 256 bytes: */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 323 | u32 xmm_space[64]; |
Ingo Molnar | ca9cda2 | 2008-03-05 15:15:42 +0100 | [diff] [blame] | 324 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 325 | u32 padding[24]; |
| 326 | |
Glauber de Oliveira Costa | 46265df | 2008-01-30 13:31:41 +0100 | [diff] [blame] | 327 | } __attribute__((aligned(16))); |
| 328 | |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 329 | struct i387_soft_struct { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 330 | u32 cwd; |
| 331 | u32 swd; |
| 332 | u32 twd; |
| 333 | u32 fip; |
| 334 | u32 fcs; |
| 335 | u32 foo; |
| 336 | u32 fos; |
| 337 | /* 8*10 bytes for each FP-reg = 80 bytes: */ |
| 338 | u32 st_space[20]; |
| 339 | u8 ftop; |
| 340 | u8 changed; |
| 341 | u8 lookahead; |
| 342 | u8 no_update; |
| 343 | u8 rm; |
| 344 | u8 alimit; |
| 345 | struct info *info; |
| 346 | u32 entry_eip; |
Glauber de Oliveira Costa | 46265df | 2008-01-30 13:31:41 +0100 | [diff] [blame] | 347 | }; |
| 348 | |
Suresh Siddha | 61c4628 | 2008-03-10 15:28:04 -0700 | [diff] [blame] | 349 | union thread_xstate { |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 350 | struct i387_fsave_struct fsave; |
| 351 | struct i387_fxsave_struct fxsave; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 352 | struct i387_soft_struct soft; |
Roland McGrath | 99f8ecd | 2008-01-30 13:31:48 +0100 | [diff] [blame] | 353 | }; |
| 354 | |
Glauber Costa | fe67620 | 2008-03-03 14:12:56 -0300 | [diff] [blame] | 355 | #ifdef CONFIG_X86_64 |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 356 | DECLARE_PER_CPU(struct orig_ist, orig_ist); |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 357 | #endif |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 358 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 359 | extern void print_cpu_info(struct cpuinfo_x86 *); |
Suresh Siddha | 61c4628 | 2008-03-10 15:28:04 -0700 | [diff] [blame] | 360 | extern unsigned int xstate_size; |
Suresh Siddha | aa283f4 | 2008-03-10 15:28:05 -0700 | [diff] [blame] | 361 | extern void free_thread_xstate(struct task_struct *); |
| 362 | extern struct kmem_cache *task_xstate_cachep; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 363 | extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); |
| 364 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); |
| 365 | extern unsigned short num_cache_leaves; |
| 366 | |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 367 | struct thread_struct { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 368 | /* Cached TLS descriptors: */ |
| 369 | struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; |
| 370 | unsigned long sp0; |
| 371 | unsigned long sp; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 372 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 373 | unsigned long sysenter_cs; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 374 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 375 | unsigned long usersp; /* Copy from PDA */ |
| 376 | unsigned short es; |
| 377 | unsigned short ds; |
| 378 | unsigned short fsindex; |
| 379 | unsigned short gsindex; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 380 | #endif |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 381 | unsigned long ip; |
| 382 | unsigned long fs; |
| 383 | unsigned long gs; |
| 384 | /* Hardware debugging registers: */ |
| 385 | unsigned long debugreg0; |
| 386 | unsigned long debugreg1; |
| 387 | unsigned long debugreg2; |
| 388 | unsigned long debugreg3; |
| 389 | unsigned long debugreg6; |
| 390 | unsigned long debugreg7; |
| 391 | /* Fault info: */ |
| 392 | unsigned long cr2; |
| 393 | unsigned long trap_no; |
| 394 | unsigned long error_code; |
Suresh Siddha | 61c4628 | 2008-03-10 15:28:04 -0700 | [diff] [blame] | 395 | /* floating point and extended processor state */ |
| 396 | union thread_xstate *xstate; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 397 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 398 | /* Virtual 86 mode info */ |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 399 | struct vm86_struct __user *vm86_info; |
| 400 | unsigned long screen_bitmap; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 401 | unsigned long v86flags; |
| 402 | unsigned long v86mask; |
| 403 | unsigned long saved_sp0; |
| 404 | unsigned int saved_fs; |
| 405 | unsigned int saved_gs; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 406 | #endif |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 407 | /* IO permissions: */ |
| 408 | unsigned long *io_bitmap_ptr; |
| 409 | unsigned long iopl; |
| 410 | /* Max allowed port in the bitmap, in bytes: */ |
| 411 | unsigned io_bitmap_max; |
Glauber de Oliveira Costa | cb38d37 | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 412 | /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */ |
| 413 | unsigned long debugctlmsr; |
| 414 | /* Debug Store - if not 0 points to a DS Save Area configuration; |
| 415 | * goes into MSR_IA32_DS_AREA */ |
| 416 | unsigned long ds_area_msr; |
| 417 | }; |
| 418 | |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 419 | static inline unsigned long native_get_debugreg(int regno) |
| 420 | { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 421 | unsigned long val = 0; /* Damn you, gcc! */ |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 422 | |
| 423 | switch (regno) { |
| 424 | case 0: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 425 | asm("mov %%db0, %0" :"=r" (val)); |
| 426 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 427 | case 1: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 428 | asm("mov %%db1, %0" :"=r" (val)); |
| 429 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 430 | case 2: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 431 | asm("mov %%db2, %0" :"=r" (val)); |
| 432 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 433 | case 3: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 434 | asm("mov %%db3, %0" :"=r" (val)); |
| 435 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 436 | case 6: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 437 | asm("mov %%db6, %0" :"=r" (val)); |
| 438 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 439 | case 7: |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 440 | asm("mov %%db7, %0" :"=r" (val)); |
| 441 | break; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 442 | default: |
| 443 | BUG(); |
| 444 | } |
| 445 | return val; |
| 446 | } |
| 447 | |
| 448 | static inline void native_set_debugreg(int regno, unsigned long value) |
| 449 | { |
| 450 | switch (regno) { |
| 451 | case 0: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 452 | asm("mov %0, %%db0" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 453 | break; |
| 454 | case 1: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 455 | asm("mov %0, %%db1" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 456 | break; |
| 457 | case 2: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 458 | asm("mov %0, %%db2" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 459 | break; |
| 460 | case 3: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 461 | asm("mov %0, %%db3" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 462 | break; |
| 463 | case 6: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 464 | asm("mov %0, %%db6" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 465 | break; |
| 466 | case 7: |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 467 | asm("mov %0, %%db7" ::"r" (value)); |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 468 | break; |
| 469 | default: |
| 470 | BUG(); |
| 471 | } |
| 472 | } |
| 473 | |
Glauber de Oliveira Costa | 62d7d7e | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 474 | /* |
| 475 | * Set IOPL bits in EFLAGS from given mask |
| 476 | */ |
| 477 | static inline void native_set_iopl_mask(unsigned mask) |
| 478 | { |
| 479 | #ifdef CONFIG_X86_32 |
| 480 | unsigned int reg; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 481 | |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 482 | asm volatile ("pushfl;" |
| 483 | "popl %0;" |
| 484 | "andl %1, %0;" |
| 485 | "orl %2, %0;" |
| 486 | "pushl %0;" |
| 487 | "popfl" |
| 488 | : "=&r" (reg) |
| 489 | : "i" (~X86_EFLAGS_IOPL), "r" (mask)); |
Glauber de Oliveira Costa | 62d7d7e | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 490 | #endif |
| 491 | } |
| 492 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 493 | static inline void |
| 494 | 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] | 495 | { |
| 496 | tss->x86_tss.sp0 = thread->sp0; |
| 497 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 498 | /* 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] | 499 | if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { |
| 500 | tss->x86_tss.ss1 = thread->sysenter_cs; |
| 501 | wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); |
| 502 | } |
| 503 | #endif |
| 504 | } |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 505 | |
Glauber de Oliveira Costa | e801f86 | 2008-01-30 13:32:08 +0100 | [diff] [blame] | 506 | static inline void native_swapgs(void) |
| 507 | { |
| 508 | #ifdef CONFIG_X86_64 |
| 509 | asm volatile("swapgs" ::: "memory"); |
| 510 | #endif |
| 511 | } |
| 512 | |
Glauber de Oliveira Costa | 7818a1e | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 513 | #ifdef CONFIG_PARAVIRT |
| 514 | #include <asm/paravirt.h> |
| 515 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 516 | #define __cpuid native_cpuid |
| 517 | #define paravirt_enabled() 0 |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 518 | |
| 519 | /* |
| 520 | * These special macros can be used to get or set a debugging register |
| 521 | */ |
| 522 | #define get_debugreg(var, register) \ |
| 523 | (var) = native_get_debugreg(register) |
| 524 | #define set_debugreg(value, register) \ |
| 525 | native_set_debugreg(register, value) |
| 526 | |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 527 | static inline void load_sp0(struct tss_struct *tss, |
| 528 | struct thread_struct *thread) |
Glauber de Oliveira Costa | 7818a1e | 2008-01-30 13:31:31 +0100 | [diff] [blame] | 529 | { |
| 530 | native_load_sp0(tss, thread); |
| 531 | } |
| 532 | |
Glauber de Oliveira Costa | 62d7d7e | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 533 | #define set_iopl_mask native_set_iopl_mask |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 534 | #endif /* CONFIG_PARAVIRT */ |
| 535 | |
| 536 | /* |
| 537 | * Save the cr4 feature set we're using (ie |
| 538 | * Pentium 4MB enable and PPro Global page |
| 539 | * enable), so that any CPU's that boot up |
| 540 | * after us can get the correct flags. |
| 541 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 542 | extern unsigned long mmu_cr4_features; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 543 | |
| 544 | static inline void set_in_cr4(unsigned long mask) |
| 545 | { |
| 546 | unsigned cr4; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 547 | |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 548 | mmu_cr4_features |= mask; |
| 549 | cr4 = read_cr4(); |
| 550 | cr4 |= mask; |
| 551 | write_cr4(cr4); |
| 552 | } |
| 553 | |
| 554 | static inline void clear_in_cr4(unsigned long mask) |
| 555 | { |
| 556 | unsigned cr4; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 557 | |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 558 | mmu_cr4_features &= ~mask; |
| 559 | cr4 = read_cr4(); |
| 560 | cr4 &= ~mask; |
| 561 | write_cr4(cr4); |
| 562 | } |
| 563 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 564 | struct microcode_header { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 565 | unsigned int hdrver; |
| 566 | unsigned int rev; |
| 567 | unsigned int date; |
| 568 | unsigned int sig; |
| 569 | unsigned int cksum; |
| 570 | unsigned int ldrver; |
| 571 | unsigned int pf; |
| 572 | unsigned int datasize; |
| 573 | unsigned int totalsize; |
| 574 | unsigned int reserved[3]; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 575 | }; |
Glauber de Oliveira Costa | 1b46cbe | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 576 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 577 | struct microcode { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 578 | struct microcode_header hdr; |
| 579 | unsigned int bits[0]; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 580 | }; |
| 581 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 582 | typedef struct microcode microcode_t; |
| 583 | typedef struct microcode_header microcode_header_t; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 584 | |
| 585 | /* microcode format is extended from prescott processors */ |
| 586 | struct extended_signature { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 587 | unsigned int sig; |
| 588 | unsigned int pf; |
| 589 | unsigned int cksum; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 590 | }; |
| 591 | |
| 592 | struct extended_sigtable { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 593 | unsigned int count; |
| 594 | unsigned int cksum; |
| 595 | unsigned int reserved[3]; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 596 | struct extended_signature sigs[0]; |
| 597 | }; |
| 598 | |
Glauber de Oliveira Costa | fc87e90 | 2008-01-30 13:31:38 +0100 | [diff] [blame] | 599 | typedef struct { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 600 | unsigned long seg; |
Glauber de Oliveira Costa | fc87e90 | 2008-01-30 13:31:38 +0100 | [diff] [blame] | 601 | } mm_segment_t; |
| 602 | |
| 603 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 604 | /* |
| 605 | * create a kernel thread without removing it from tasklists |
| 606 | */ |
| 607 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); |
| 608 | |
| 609 | /* Free all resources held by a thread. */ |
| 610 | extern void release_thread(struct task_struct *); |
| 611 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 612 | /* Prepare to copy thread state - unlazy all lazy state */ |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 613 | extern void prepare_to_copy(struct task_struct *tsk); |
| 614 | |
| 615 | unsigned long get_wchan(struct task_struct *p); |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 616 | |
| 617 | /* |
| 618 | * Generic CPUID function |
| 619 | * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx |
| 620 | * resulting in stale register contents being returned. |
| 621 | */ |
| 622 | static inline void cpuid(unsigned int op, |
| 623 | unsigned int *eax, unsigned int *ebx, |
| 624 | unsigned int *ecx, unsigned int *edx) |
| 625 | { |
| 626 | *eax = op; |
| 627 | *ecx = 0; |
| 628 | __cpuid(eax, ebx, ecx, edx); |
| 629 | } |
| 630 | |
| 631 | /* Some CPUID calls want 'count' to be placed in ecx */ |
| 632 | static inline void cpuid_count(unsigned int op, int count, |
| 633 | unsigned int *eax, unsigned int *ebx, |
| 634 | unsigned int *ecx, unsigned int *edx) |
| 635 | { |
| 636 | *eax = op; |
| 637 | *ecx = count; |
| 638 | __cpuid(eax, ebx, ecx, edx); |
| 639 | } |
| 640 | |
| 641 | /* |
| 642 | * CPUID functions returning a single datum |
| 643 | */ |
| 644 | static inline unsigned int cpuid_eax(unsigned int op) |
| 645 | { |
| 646 | unsigned int eax, ebx, ecx, edx; |
| 647 | |
| 648 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 649 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 650 | return eax; |
| 651 | } |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 652 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 653 | static inline unsigned int cpuid_ebx(unsigned int op) |
| 654 | { |
| 655 | unsigned int eax, ebx, ecx, edx; |
| 656 | |
| 657 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 658 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 659 | return ebx; |
| 660 | } |
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 | static inline unsigned int cpuid_ecx(unsigned int op) |
| 663 | { |
| 664 | unsigned int eax, ebx, ecx, edx; |
| 665 | |
| 666 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 667 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 668 | return ecx; |
| 669 | } |
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 | static inline unsigned int cpuid_edx(unsigned int op) |
| 672 | { |
| 673 | unsigned int eax, ebx, ecx, edx; |
| 674 | |
| 675 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 676 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 677 | return edx; |
| 678 | } |
| 679 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 680 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ |
| 681 | static inline void rep_nop(void) |
| 682 | { |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 683 | asm volatile("rep; nop" ::: "memory"); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 684 | } |
| 685 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 686 | static inline void cpu_relax(void) |
| 687 | { |
| 688 | rep_nop(); |
| 689 | } |
| 690 | |
| 691 | /* Stop speculative execution: */ |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 692 | static inline void sync_core(void) |
| 693 | { |
| 694 | int tmp; |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 695 | |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 696 | asm volatile("cpuid" : "=a" (tmp) : "0" (1) |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 697 | : "ebx", "ecx", "edx", "memory"); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 698 | } |
| 699 | |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 700 | static inline void __monitor(const void *eax, unsigned long ecx, |
| 701 | unsigned long edx) |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 702 | { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 703 | /* "monitor %eax, %ecx, %edx;" */ |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 704 | asm volatile(".byte 0x0f, 0x01, 0xc8;" |
| 705 | :: "a" (eax), "c" (ecx), "d"(edx)); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 706 | } |
| 707 | |
| 708 | static inline void __mwait(unsigned long eax, unsigned long ecx) |
| 709 | { |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 710 | /* "mwait %eax, %ecx;" */ |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 711 | asm volatile(".byte 0x0f, 0x01, 0xc9;" |
| 712 | :: "a" (eax), "c" (ecx)); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | static inline void __sti_mwait(unsigned long eax, unsigned long ecx) |
| 716 | { |
Peter Zijlstra | 7f424a8 | 2008-04-25 17:39:01 +0200 | [diff] [blame] | 717 | trace_hardirqs_on(); |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 718 | /* "mwait %eax, %ecx;" */ |
Joe Perches | cca2e6f | 2008-03-23 01:03:15 -0700 | [diff] [blame] | 719 | asm volatile("sti; .byte 0x0f, 0x01, 0xc9;" |
| 720 | :: "a" (eax), "c" (ecx)); |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx); |
| 724 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 725 | extern int force_mwait; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 726 | |
| 727 | extern void select_idle_routine(const struct cpuinfo_x86 *c); |
| 728 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 729 | extern unsigned long boot_option_idle_override; |
Zhao Yakui | c1e3b37 | 2008-06-24 17:58:53 +0800 | [diff] [blame] | 730 | extern unsigned long idle_halt; |
Zhao Yakui | da5e09a | 2008-06-24 18:01:09 +0800 | [diff] [blame] | 731 | extern unsigned long idle_nomwait; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 732 | |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 733 | extern void enable_sep_cpu(void); |
| 734 | extern int sysenter_setup(void); |
| 735 | |
| 736 | /* Defined in head.S */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 737 | extern struct desc_ptr early_gdt_descr; |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 738 | |
| 739 | extern void cpu_set_gdt(int); |
| 740 | extern void switch_to_new_gdt(void); |
| 741 | extern void cpu_init(void); |
| 742 | extern void init_gdt(int cpu); |
| 743 | |
Jan Beulich | 5b0e508 | 2008-03-10 13:11:17 +0000 | [diff] [blame] | 744 | static inline void update_debugctlmsr(unsigned long debugctlmsr) |
| 745 | { |
| 746 | #ifndef CONFIG_X86_DEBUGCTLMSR |
| 747 | if (boot_cpu_data.x86 < 6) |
| 748 | return; |
| 749 | #endif |
| 750 | wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); |
| 751 | } |
| 752 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 753 | /* |
| 754 | * from system description table in BIOS. Mostly for MCA use, but |
| 755 | * others may find it useful: |
| 756 | */ |
| 757 | extern unsigned int machine_id; |
| 758 | extern unsigned int machine_submodel_id; |
| 759 | extern unsigned int BIOS_revision; |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 760 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 761 | /* Boot loader type from the setup header: */ |
| 762 | extern int bootloader_type; |
Glauber de Oliveira Costa | 1a53905 | 2008-01-30 13:31:39 +0100 | [diff] [blame] | 763 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 764 | extern char ignore_fpu_irq; |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 765 | |
| 766 | #define HAVE_ARCH_PICK_MMAP_LAYOUT 1 |
| 767 | #define ARCH_HAS_PREFETCHW |
| 768 | #define ARCH_HAS_SPINLOCK_PREFETCH |
| 769 | |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 770 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 771 | # define BASE_PREFETCH ASM_NOP4 |
| 772 | # define ARCH_HAS_PREFETCH |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 773 | #else |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 774 | # define BASE_PREFETCH "prefetcht0 (%1)" |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 775 | #endif |
| 776 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 777 | /* |
| 778 | * Prefetch instructions for Pentium III (+) and AMD Athlon (+) |
| 779 | * |
| 780 | * It's not worth to care about 3dnow prefetches for the K6 |
| 781 | * because they are microcoded there and very slow. |
| 782 | */ |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 783 | static inline void prefetch(const void *x) |
| 784 | { |
| 785 | alternative_input(BASE_PREFETCH, |
| 786 | "prefetchnta (%1)", |
| 787 | X86_FEATURE_XMM, |
| 788 | "r" (x)); |
| 789 | } |
| 790 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 791 | /* |
| 792 | * 3dnow prefetch to get an exclusive cache line. |
| 793 | * Useful for spinlocks to avoid one state transition in the |
| 794 | * cache coherency protocol: |
| 795 | */ |
Glauber de Oliveira Costa | ae2e15e | 2008-01-30 13:31:40 +0100 | [diff] [blame] | 796 | static inline void prefetchw(const void *x) |
| 797 | { |
| 798 | alternative_input(BASE_PREFETCH, |
| 799 | "prefetchw (%1)", |
| 800 | X86_FEATURE_3DNOW, |
| 801 | "r" (x)); |
| 802 | } |
| 803 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 804 | static inline void spin_lock_prefetch(const void *x) |
| 805 | { |
| 806 | prefetchw(x); |
| 807 | } |
| 808 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 809 | #ifdef CONFIG_X86_32 |
| 810 | /* |
| 811 | * User space process size: 3GB (default). |
| 812 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 813 | #define TASK_SIZE PAGE_OFFSET |
| 814 | #define STACK_TOP TASK_SIZE |
| 815 | #define STACK_TOP_MAX STACK_TOP |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 816 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 817 | #define INIT_THREAD { \ |
| 818 | .sp0 = sizeof(init_stack) + (long)&init_stack, \ |
| 819 | .vm86_info = NULL, \ |
| 820 | .sysenter_cs = __KERNEL_CS, \ |
| 821 | .io_bitmap_ptr = NULL, \ |
| 822 | .fs = __KERNEL_PERCPU, \ |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | /* |
| 826 | * Note that the .io_bitmap member must be extra-big. This is because |
| 827 | * the CPU will access an additional byte beyond the end of the IO |
| 828 | * permission bitmap. The extra byte must be all 1 bits, and must |
| 829 | * be within the limit. |
| 830 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 831 | #define INIT_TSS { \ |
| 832 | .x86_tss = { \ |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 833 | .sp0 = sizeof(init_stack) + (long)&init_stack, \ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 834 | .ss0 = __KERNEL_DS, \ |
| 835 | .ss1 = __KERNEL_CS, \ |
| 836 | .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ |
| 837 | }, \ |
| 838 | .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 839 | } |
| 840 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 841 | extern unsigned long thread_saved_pc(struct task_struct *tsk); |
| 842 | |
| 843 | #define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long)) |
| 844 | #define KSTK_TOP(info) \ |
| 845 | ({ \ |
| 846 | unsigned long *__ptr = (unsigned long *)(info); \ |
| 847 | (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \ |
| 848 | }) |
| 849 | |
| 850 | /* |
| 851 | * The below -8 is to reserve 8 bytes on top of the ring0 stack. |
| 852 | * This is necessary to guarantee that the entire "struct pt_regs" |
| 853 | * is accessable even if the CPU haven't stored the SS/ESP registers |
| 854 | * on the stack (interrupt gate does not save these registers |
| 855 | * when switching to the same priv ring). |
| 856 | * Therefore beware: accessing the ss/esp fields of the |
| 857 | * "struct pt_regs" is possible, but they may contain the |
| 858 | * completely wrong values. |
| 859 | */ |
| 860 | #define task_pt_regs(task) \ |
| 861 | ({ \ |
| 862 | struct pt_regs *__regs__; \ |
| 863 | __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \ |
| 864 | __regs__ - 1; \ |
| 865 | }) |
| 866 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 867 | #define KSTK_ESP(task) (task_pt_regs(task)->sp) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 868 | |
| 869 | #else |
| 870 | /* |
| 871 | * User space process size. 47bits minus one guard page. |
| 872 | */ |
Cyrill Gorcunov | a5ae1c3 | 2008-03-13 19:44:56 +0300 | [diff] [blame] | 873 | #define TASK_SIZE64 ((1UL << 47) - PAGE_SIZE) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 874 | |
| 875 | /* This decides where the kernel will search for a free chunk of vm |
| 876 | * space during mmap's. |
| 877 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 878 | #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \ |
| 879 | 0xc0000000 : 0xFFFFe000) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 880 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 881 | #define TASK_SIZE (test_thread_flag(TIF_IA32) ? \ |
| 882 | IA32_PAGE_OFFSET : TASK_SIZE64) |
| 883 | #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \ |
| 884 | IA32_PAGE_OFFSET : TASK_SIZE64) |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 885 | |
David Howells | 922a70d | 2008-02-08 04:19:26 -0800 | [diff] [blame] | 886 | #define STACK_TOP TASK_SIZE |
| 887 | #define STACK_TOP_MAX TASK_SIZE64 |
| 888 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 889 | #define INIT_THREAD { \ |
| 890 | .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ |
| 891 | } |
| 892 | |
| 893 | #define INIT_TSS { \ |
| 894 | .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ |
| 895 | } |
| 896 | |
Glauber de Oliveira Costa | 2f66dcc | 2008-01-30 13:31:57 +0100 | [diff] [blame] | 897 | /* |
| 898 | * Return saved PC of a blocked thread. |
| 899 | * What is this good for? it will be always the scheduler or ret_from_fork. |
| 900 | */ |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 901 | #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] | 902 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 903 | #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1) |
| 904 | #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] | 905 | #endif /* CONFIG_X86_64 */ |
| 906 | |
Ingo Molnar | 513ad84 | 2008-02-21 05:18:40 +0100 | [diff] [blame] | 907 | extern void start_thread(struct pt_regs *regs, unsigned long new_ip, |
| 908 | unsigned long new_sp); |
| 909 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 910 | /* |
| 911 | * 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] | 912 | * space during mmap's. |
| 913 | */ |
| 914 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) |
| 915 | |
Ingo Molnar | 4d46a89 | 2008-02-21 04:24:40 +0100 | [diff] [blame] | 916 | #define KSTK_EIP(task) (task_pt_regs(task)->ip) |
Glauber de Oliveira Costa | 683e025 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 917 | |
Erik Bosman | 529e25f | 2008-04-14 00:24:18 +0200 | [diff] [blame] | 918 | /* Get/set a process' ability to use the timestamp counter instruction */ |
| 919 | #define GET_TSC_CTL(adr) get_tsc_mode((adr)) |
| 920 | #define SET_TSC_CTL(val) set_tsc_mode((val)) |
| 921 | |
| 922 | extern int get_tsc_mode(unsigned long adr); |
| 923 | extern int set_tsc_mode(unsigned int val); |
| 924 | |
Glauber de Oliveira Costa | c758ecf | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 925 | #endif |