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1da177e4 LT |
1 | /* |
2 | * include/asm-x86_64/processor.h | |
3 | * | |
4 | * Copyright (C) 1994 Linus Torvalds | |
5 | */ | |
6 | ||
7 | #ifndef __ASM_X86_64_PROCESSOR_H | |
8 | #define __ASM_X86_64_PROCESSOR_H | |
9 | ||
10 | #include <asm/segment.h> | |
11 | #include <asm/page.h> | |
12 | #include <asm/types.h> | |
13 | #include <asm/sigcontext.h> | |
14 | #include <asm/cpufeature.h> | |
1da177e4 LT |
15 | #include <linux/threads.h> |
16 | #include <asm/msr.h> | |
17 | #include <asm/current.h> | |
18 | #include <asm/system.h> | |
19 | #include <asm/mmsegment.h> | |
20 | #include <asm/percpu.h> | |
21 | #include <linux/personality.h> | |
1e9f28fa | 22 | #include <linux/cpumask.h> |
5d02d7ae | 23 | #include <asm/processor-flags.h> |
1da177e4 LT |
24 | |
25 | #define TF_MASK 0x00000100 | |
26 | #define IF_MASK 0x00000200 | |
27 | #define IOPL_MASK 0x00003000 | |
28 | #define NT_MASK 0x00004000 | |
29 | #define VM_MASK 0x00020000 | |
30 | #define AC_MASK 0x00040000 | |
31 | #define VIF_MASK 0x00080000 /* virtual interrupt flag */ | |
32 | #define VIP_MASK 0x00100000 /* virtual interrupt pending */ | |
33 | #define ID_MASK 0x00200000 | |
34 | ||
35 | #define desc_empty(desc) \ | |
12aaa085 | 36 | (!((desc)->a | (desc)->b)) |
1da177e4 LT |
37 | |
38 | #define desc_equal(desc1, desc2) \ | |
39 | (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b)) | |
40 | ||
41 | /* | |
42 | * Default implementation of macro that returns current | |
43 | * instruction pointer ("program counter"). | |
44 | */ | |
45 | #define current_text_addr() ({ void *pc; asm volatile("leaq 1f(%%rip),%0\n1:":"=r"(pc)); pc; }) | |
46 | ||
47 | /* | |
48 | * CPU type and hardware bug flags. Kept separately for each CPU. | |
49 | */ | |
50 | ||
51 | struct cpuinfo_x86 { | |
52 | __u8 x86; /* CPU family */ | |
53 | __u8 x86_vendor; /* CPU vendor */ | |
54 | __u8 x86_model; | |
55 | __u8 x86_mask; | |
56 | int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */ | |
57 | __u32 x86_capability[NCAPINTS]; | |
58 | char x86_vendor_id[16]; | |
59 | char x86_model_id[64]; | |
60 | int x86_cache_size; /* in KB */ | |
61 | int x86_clflush_size; | |
62 | int x86_cache_alignment; | |
63 | int x86_tlbsize; /* number of 4K pages in DTLB/ITLB combined(in pages)*/ | |
64 | __u8 x86_virt_bits, x86_phys_bits; | |
94605eff | 65 | __u8 x86_max_cores; /* cpuid returned max cores value */ |
1da177e4 | 66 | __u32 x86_power; |
ebfcaa96 | 67 | __u32 extended_cpuid_level; /* Max extended CPUID function supported */ |
1da177e4 | 68 | unsigned long loops_per_jiffy; |
1e9f28fa SS |
69 | #ifdef CONFIG_SMP |
70 | cpumask_t llc_shared_map; /* cpus sharing the last level cache */ | |
71 | #endif | |
94605eff | 72 | __u8 apicid; |
f3fa8ebc | 73 | #ifdef CONFIG_SMP |
94605eff | 74 | __u8 booted_cores; /* number of cores as seen by OS */ |
f3fa8ebc RS |
75 | __u8 phys_proc_id; /* Physical Processor id. */ |
76 | __u8 cpu_core_id; /* Core id. */ | |
92cb7612 | 77 | __u8 cpu_index; /* index into per_cpu list */ |
f3fa8ebc | 78 | #endif |
1da177e4 LT |
79 | } ____cacheline_aligned; |
80 | ||
81 | #define X86_VENDOR_INTEL 0 | |
82 | #define X86_VENDOR_CYRIX 1 | |
83 | #define X86_VENDOR_AMD 2 | |
84 | #define X86_VENDOR_UMC 3 | |
85 | #define X86_VENDOR_NEXGEN 4 | |
86 | #define X86_VENDOR_CENTAUR 5 | |
1da177e4 LT |
87 | #define X86_VENDOR_TRANSMETA 7 |
88 | #define X86_VENDOR_NUM 8 | |
89 | #define X86_VENDOR_UNKNOWN 0xff | |
90 | ||
91 | #ifdef CONFIG_SMP | |
92cb7612 MT |
92 | DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info); |
93 | #define cpu_data(cpu) per_cpu(cpu_info, cpu) | |
94 | #define current_cpu_data cpu_data(smp_processor_id()) | |
1da177e4 | 95 | #else |
92cb7612 MT |
96 | #define cpu_data(cpu) boot_cpu_data |
97 | #define current_cpu_data boot_cpu_data | |
1da177e4 LT |
98 | #endif |
99 | ||
100 | extern char ignore_irq13; | |
101 | ||
102 | extern void identify_cpu(struct cpuinfo_x86 *); | |
103 | extern void print_cpu_info(struct cpuinfo_x86 *); | |
1d67953f | 104 | extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); |
1da177e4 | 105 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); |
240cd6a8 | 106 | extern unsigned short num_cache_leaves; |
1da177e4 | 107 | |
1da177e4 LT |
108 | /* |
109 | * Save the cr4 feature set we're using (ie | |
110 | * Pentium 4MB enable and PPro Global page | |
111 | * enable), so that any CPU's that boot up | |
112 | * after us can get the correct flags. | |
113 | */ | |
114 | extern unsigned long mmu_cr4_features; | |
115 | ||
116 | static inline void set_in_cr4 (unsigned long mask) | |
117 | { | |
118 | mmu_cr4_features |= mask; | |
119 | __asm__("movq %%cr4,%%rax\n\t" | |
120 | "orq %0,%%rax\n\t" | |
121 | "movq %%rax,%%cr4\n" | |
122 | : : "irg" (mask) | |
123 | :"ax"); | |
124 | } | |
125 | ||
126 | static inline void clear_in_cr4 (unsigned long mask) | |
127 | { | |
128 | mmu_cr4_features &= ~mask; | |
129 | __asm__("movq %%cr4,%%rax\n\t" | |
130 | "andq %0,%%rax\n\t" | |
131 | "movq %%rax,%%cr4\n" | |
132 | : : "irg" (~mask) | |
133 | :"ax"); | |
134 | } | |
135 | ||
136 | ||
137 | /* | |
637716a3 | 138 | * User space process size. 47bits minus one guard page. |
1da177e4 | 139 | */ |
84929801 | 140 | #define TASK_SIZE64 (0x800000000000UL - 4096) |
1da177e4 LT |
141 | |
142 | /* This decides where the kernel will search for a free chunk of vm | |
143 | * space during mmap's. | |
144 | */ | |
145 | #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000) | |
84929801 SS |
146 | |
147 | #define TASK_SIZE (test_thread_flag(TIF_IA32) ? IA32_PAGE_OFFSET : TASK_SIZE64) | |
148 | #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64) | |
149 | ||
150 | #define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE/3) | |
1da177e4 LT |
151 | |
152 | /* | |
153 | * Size of io_bitmap. | |
154 | */ | |
155 | #define IO_BITMAP_BITS 65536 | |
156 | #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) | |
157 | #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) | |
158 | #define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap) | |
159 | #define INVALID_IO_BITMAP_OFFSET 0x8000 | |
160 | ||
161 | struct i387_fxsave_struct { | |
162 | u16 cwd; | |
163 | u16 swd; | |
164 | u16 twd; | |
165 | u16 fop; | |
166 | u64 rip; | |
167 | u64 rdp; | |
168 | u32 mxcsr; | |
169 | u32 mxcsr_mask; | |
170 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
bbf30a16 | 171 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ |
1da177e4 LT |
172 | u32 padding[24]; |
173 | } __attribute__ ((aligned (16))); | |
174 | ||
175 | union i387_union { | |
176 | struct i387_fxsave_struct fxsave; | |
177 | }; | |
178 | ||
179 | struct tss_struct { | |
180 | u32 reserved1; | |
181 | u64 rsp0; | |
182 | u64 rsp1; | |
183 | u64 rsp2; | |
184 | u64 reserved2; | |
185 | u64 ist[7]; | |
186 | u32 reserved3; | |
187 | u32 reserved4; | |
188 | u16 reserved5; | |
189 | u16 io_bitmap_base; | |
190 | /* | |
191 | * The extra 1 is there because the CPU will access an | |
192 | * additional byte beyond the end of the IO permission | |
193 | * bitmap. The extra byte must be all 1 bits, and must | |
194 | * be within the limit. Thus we have: | |
195 | * | |
196 | * 128 bytes, the bitmap itself, for ports 0..0x3ff | |
197 | * 8 bytes, for an extra "long" of ~0UL | |
198 | */ | |
199 | unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; | |
200 | } __attribute__((packed)) ____cacheline_aligned; | |
201 | ||
01ebb77b | 202 | |
1da177e4 LT |
203 | extern struct cpuinfo_x86 boot_cpu_data; |
204 | DECLARE_PER_CPU(struct tss_struct,init_tss); | |
01ebb77b KO |
205 | /* Save the original ist values for checking stack pointers during debugging */ |
206 | struct orig_ist { | |
207 | unsigned long ist[7]; | |
208 | }; | |
209 | DECLARE_PER_CPU(struct orig_ist, orig_ist); | |
1da177e4 | 210 | |
5fd63b30 RT |
211 | #ifdef CONFIG_X86_VSMP |
212 | #define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT) | |
213 | #define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT) | |
214 | #else | |
1da177e4 | 215 | #define ARCH_MIN_TASKALIGN 16 |
5fd63b30 RT |
216 | #define ARCH_MIN_MMSTRUCT_ALIGN 0 |
217 | #endif | |
1da177e4 LT |
218 | |
219 | struct thread_struct { | |
220 | unsigned long rsp0; | |
221 | unsigned long rsp; | |
222 | unsigned long userrsp; /* Copy from PDA */ | |
223 | unsigned long fs; | |
224 | unsigned long gs; | |
225 | unsigned short es, ds, fsindex, gsindex; | |
226 | /* Hardware debugging registers */ | |
227 | unsigned long debugreg0; | |
228 | unsigned long debugreg1; | |
229 | unsigned long debugreg2; | |
230 | unsigned long debugreg3; | |
231 | unsigned long debugreg6; | |
232 | unsigned long debugreg7; | |
233 | /* fault info */ | |
234 | unsigned long cr2, trap_no, error_code; | |
235 | /* floating point info */ | |
236 | union i387_union i387 __attribute__((aligned(16))); | |
237 | /* IO permissions. the bitmap could be moved into the GDT, that would make | |
238 | switch faster for a limited number of ioperm using tasks. -AK */ | |
239 | int ioperm; | |
240 | unsigned long *io_bitmap_ptr; | |
241 | unsigned io_bitmap_max; | |
242 | /* cached TLS descriptors. */ | |
243 | u64 tls_array[GDT_ENTRY_TLS_ENTRIES]; | |
244 | } __attribute__((aligned(16))); | |
245 | ||
a0d58c97 AK |
246 | #define INIT_THREAD { \ |
247 | .rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \ | |
248 | } | |
249 | ||
250 | #define INIT_TSS { \ | |
251 | .rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \ | |
252 | } | |
1da177e4 LT |
253 | |
254 | #define INIT_MMAP \ | |
255 | { &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL } | |
256 | ||
1da177e4 LT |
257 | #define start_thread(regs,new_rip,new_rsp) do { \ |
258 | asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \ | |
259 | load_gs_index(0); \ | |
260 | (regs)->rip = (new_rip); \ | |
261 | (regs)->rsp = (new_rsp); \ | |
262 | write_pda(oldrsp, (new_rsp)); \ | |
263 | (regs)->cs = __USER_CS; \ | |
264 | (regs)->ss = __USER_DS; \ | |
265 | (regs)->eflags = 0x200; \ | |
266 | set_fs(USER_DS); \ | |
267 | } while(0) | |
268 | ||
e9129e56 VH |
269 | #define get_debugreg(var, register) \ |
270 | __asm__("movq %%db" #register ", %0" \ | |
271 | :"=r" (var)) | |
272 | #define set_debugreg(value, register) \ | |
273 | __asm__("movq %0,%%db" #register \ | |
274 | : /* no output */ \ | |
275 | :"r" (value)) | |
276 | ||
1da177e4 LT |
277 | struct task_struct; |
278 | struct mm_struct; | |
279 | ||
280 | /* Free all resources held by a thread. */ | |
281 | extern void release_thread(struct task_struct *); | |
282 | ||
283 | /* Prepare to copy thread state - unlazy all lazy status */ | |
284 | extern void prepare_to_copy(struct task_struct *tsk); | |
285 | ||
286 | /* | |
287 | * create a kernel thread without removing it from tasklists | |
288 | */ | |
289 | extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); | |
290 | ||
291 | /* | |
292 | * Return saved PC of a blocked thread. | |
293 | * What is this good for? it will be always the scheduler or ret_from_fork. | |
294 | */ | |
295 | #define thread_saved_pc(t) (*(unsigned long *)((t)->thread.rsp - 8)) | |
296 | ||
297 | extern unsigned long get_wchan(struct task_struct *p); | |
bb049232 AV |
298 | #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.rsp0 - 1) |
299 | #define KSTK_EIP(tsk) (task_pt_regs(tsk)->rip) | |
1da177e4 LT |
300 | #define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */ |
301 | ||
302 | ||
303 | struct microcode_header { | |
304 | unsigned int hdrver; | |
305 | unsigned int rev; | |
306 | unsigned int date; | |
307 | unsigned int sig; | |
308 | unsigned int cksum; | |
309 | unsigned int ldrver; | |
310 | unsigned int pf; | |
311 | unsigned int datasize; | |
312 | unsigned int totalsize; | |
313 | unsigned int reserved[3]; | |
314 | }; | |
315 | ||
316 | struct microcode { | |
317 | struct microcode_header hdr; | |
318 | unsigned int bits[0]; | |
319 | }; | |
320 | ||
321 | typedef struct microcode microcode_t; | |
322 | typedef struct microcode_header microcode_header_t; | |
323 | ||
324 | /* microcode format is extended from prescott processors */ | |
325 | struct extended_signature { | |
326 | unsigned int sig; | |
327 | unsigned int pf; | |
328 | unsigned int cksum; | |
329 | }; | |
330 | ||
331 | struct extended_sigtable { | |
332 | unsigned int count; | |
333 | unsigned int cksum; | |
334 | unsigned int reserved[3]; | |
335 | struct extended_signature sigs[0]; | |
336 | }; | |
337 | ||
1da177e4 | 338 | |
32c464f5 JB |
339 | #if defined(CONFIG_MPSC) || defined(CONFIG_MCORE2) |
340 | #define ASM_NOP1 P6_NOP1 | |
341 | #define ASM_NOP2 P6_NOP2 | |
342 | #define ASM_NOP3 P6_NOP3 | |
343 | #define ASM_NOP4 P6_NOP4 | |
344 | #define ASM_NOP5 P6_NOP5 | |
345 | #define ASM_NOP6 P6_NOP6 | |
346 | #define ASM_NOP7 P6_NOP7 | |
347 | #define ASM_NOP8 P6_NOP8 | |
348 | #else | |
1da177e4 LT |
349 | #define ASM_NOP1 K8_NOP1 |
350 | #define ASM_NOP2 K8_NOP2 | |
351 | #define ASM_NOP3 K8_NOP3 | |
352 | #define ASM_NOP4 K8_NOP4 | |
353 | #define ASM_NOP5 K8_NOP5 | |
354 | #define ASM_NOP6 K8_NOP6 | |
355 | #define ASM_NOP7 K8_NOP7 | |
356 | #define ASM_NOP8 K8_NOP8 | |
32c464f5 | 357 | #endif |
1da177e4 LT |
358 | |
359 | /* Opteron nops */ | |
360 | #define K8_NOP1 ".byte 0x90\n" | |
361 | #define K8_NOP2 ".byte 0x66,0x90\n" | |
362 | #define K8_NOP3 ".byte 0x66,0x66,0x90\n" | |
363 | #define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n" | |
364 | #define K8_NOP5 K8_NOP3 K8_NOP2 | |
365 | #define K8_NOP6 K8_NOP3 K8_NOP3 | |
366 | #define K8_NOP7 K8_NOP4 K8_NOP3 | |
367 | #define K8_NOP8 K8_NOP4 K8_NOP4 | |
368 | ||
32c464f5 JB |
369 | /* P6 nops */ |
370 | /* uses eax dependencies (Intel-recommended choice) */ | |
371 | #define P6_NOP1 ".byte 0x90\n" | |
372 | #define P6_NOP2 ".byte 0x66,0x90\n" | |
373 | #define P6_NOP3 ".byte 0x0f,0x1f,0x00\n" | |
374 | #define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n" | |
375 | #define P6_NOP5 ".byte 0x0f,0x1f,0x44,0x00,0\n" | |
376 | #define P6_NOP6 ".byte 0x66,0x0f,0x1f,0x44,0x00,0\n" | |
377 | #define P6_NOP7 ".byte 0x0f,0x1f,0x80,0,0,0,0\n" | |
378 | #define P6_NOP8 ".byte 0x0f,0x1f,0x84,0x00,0,0,0,0\n" | |
379 | ||
1da177e4 LT |
380 | #define ASM_NOP_MAX 8 |
381 | ||
382 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ | |
9c0aa0f9 | 383 | static inline void rep_nop(void) |
1da177e4 LT |
384 | { |
385 | __asm__ __volatile__("rep;nop": : :"memory"); | |
386 | } | |
387 | ||
388 | /* Stop speculative execution */ | |
9c0aa0f9 | 389 | static inline void sync_core(void) |
1da177e4 LT |
390 | { |
391 | int tmp; | |
392 | asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory"); | |
393 | } | |
394 | ||
1da177e4 LT |
395 | #define ARCH_HAS_PREFETCHW 1 |
396 | static inline void prefetchw(void *x) | |
397 | { | |
19aaabb5 | 398 | alternative_input("prefetcht0 (%1)", |
1da177e4 LT |
399 | "prefetchw (%1)", |
400 | X86_FEATURE_3DNOW, | |
401 | "r" (x)); | |
402 | } | |
403 | ||
404 | #define ARCH_HAS_SPINLOCK_PREFETCH 1 | |
405 | ||
406 | #define spin_lock_prefetch(x) prefetchw(x) | |
407 | ||
408 | #define cpu_relax() rep_nop() | |
409 | ||
1da177e4 LT |
410 | static inline void __monitor(const void *eax, unsigned long ecx, |
411 | unsigned long edx) | |
412 | { | |
413 | /* "monitor %eax,%ecx,%edx;" */ | |
414 | asm volatile( | |
415 | ".byte 0x0f,0x01,0xc8;" | |
416 | : :"a" (eax), "c" (ecx), "d"(edx)); | |
417 | } | |
418 | ||
419 | static inline void __mwait(unsigned long eax, unsigned long ecx) | |
420 | { | |
421 | /* "mwait %eax,%ecx;" */ | |
422 | asm volatile( | |
423 | ".byte 0x0f,0x01,0xc9;" | |
424 | : :"a" (eax), "c" (ecx)); | |
425 | } | |
426 | ||
d331e739 VP |
427 | static inline void __sti_mwait(unsigned long eax, unsigned long ecx) |
428 | { | |
429 | /* "mwait %eax,%ecx;" */ | |
430 | asm volatile( | |
431 | "sti; .byte 0x0f,0x01,0xc9;" | |
432 | : :"a" (eax), "c" (ecx)); | |
433 | } | |
434 | ||
991528d7 VP |
435 | extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx); |
436 | ||
1da177e4 LT |
437 | #define stack_current() \ |
438 | ({ \ | |
439 | struct thread_info *ti; \ | |
440 | asm("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ | |
441 | ti->task; \ | |
442 | }) | |
443 | ||
444 | #define cache_line_size() (boot_cpu_data.x86_cache_alignment) | |
445 | ||
446 | extern unsigned long boot_option_idle_override; | |
447 | /* Boot loader type from the setup header */ | |
448 | extern int bootloader_type; | |
449 | ||
8817210d AK |
450 | #define HAVE_ARCH_PICK_MMAP_LAYOUT 1 |
451 | ||
1da177e4 | 452 | #endif /* __ASM_X86_64_PROCESSOR_H */ |