Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * include/asm-i386/processor.h | |
3 | * | |
4 | * Copyright (C) 1994 Linus Torvalds | |
5 | */ | |
6 | ||
7 | #ifndef __ASM_I386_PROCESSOR_H | |
8 | #define __ASM_I386_PROCESSOR_H | |
9 | ||
10 | #include <asm/vm86.h> | |
11 | #include <asm/math_emu.h> | |
12 | #include <asm/segment.h> | |
13 | #include <asm/page.h> | |
14 | #include <asm/types.h> | |
15 | #include <asm/sigcontext.h> | |
16 | #include <asm/cpufeature.h> | |
17 | #include <asm/msr.h> | |
18 | #include <asm/system.h> | |
19 | #include <linux/cache.h> | |
1da177e4 LT |
20 | #include <linux/threads.h> |
21 | #include <asm/percpu.h> | |
1e9f28fa | 22 | #include <linux/cpumask.h> |
d7cd5611 | 23 | #include <linux/init.h> |
b4531e86 | 24 | #include <asm/processor-flags.h> |
1da177e4 LT |
25 | |
26 | /* flag for disabling the tsc */ | |
27 | extern int tsc_disable; | |
28 | ||
29 | struct desc_struct { | |
30 | unsigned long a,b; | |
31 | }; | |
32 | ||
33 | #define desc_empty(desc) \ | |
12aaa085 | 34 | (!((desc)->a | (desc)->b)) |
1da177e4 LT |
35 | |
36 | #define desc_equal(desc1, desc2) \ | |
37 | (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b)) | |
38 | /* | |
39 | * Default implementation of macro that returns current | |
40 | * instruction pointer ("program counter"). | |
41 | */ | |
42 | #define current_text_addr() ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; }) | |
43 | ||
44 | /* | |
45 | * CPU type and hardware bug flags. Kept separately for each CPU. | |
46 | * Members of this structure are referenced in head.S, so think twice | |
47 | * before touching them. [mj] | |
48 | */ | |
49 | ||
50 | struct cpuinfo_x86 { | |
51 | __u8 x86; /* CPU family */ | |
52 | __u8 x86_vendor; /* CPU vendor */ | |
53 | __u8 x86_model; | |
54 | __u8 x86_mask; | |
55 | char wp_works_ok; /* It doesn't on 386's */ | |
56 | char hlt_works_ok; /* Problems on some 486Dx4's and old 386's */ | |
57 | char hard_math; | |
58 | char rfu; | |
59 | int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */ | |
60 | unsigned long x86_capability[NCAPINTS]; | |
61 | char x86_vendor_id[16]; | |
62 | char x86_model_id[64]; | |
63 | int x86_cache_size; /* in KB - valid for CPUS which support this | |
64 | call */ | |
65 | int x86_cache_alignment; /* In bytes */ | |
3f98bc49 AK |
66 | char fdiv_bug; |
67 | char f00f_bug; | |
68 | char coma_bug; | |
69 | char pad0; | |
70 | int x86_power; | |
1da177e4 | 71 | unsigned long loops_per_jiffy; |
1e9f28fa SS |
72 | #ifdef CONFIG_SMP |
73 | cpumask_t llc_shared_map; /* cpus sharing the last level cache */ | |
74 | #endif | |
94605eff | 75 | unsigned char x86_max_cores; /* cpuid returned max cores value */ |
94605eff | 76 | unsigned char apicid; |
770d132f | 77 | unsigned short x86_clflush_size; |
4b89aff9 RS |
78 | #ifdef CONFIG_SMP |
79 | unsigned char booted_cores; /* number of cores as seen by OS */ | |
80 | __u8 phys_proc_id; /* Physical processor id. */ | |
81 | __u8 cpu_core_id; /* Core id */ | |
82 | #endif | |
1da177e4 LT |
83 | } __attribute__((__aligned__(SMP_CACHE_BYTES))); |
84 | ||
85 | #define X86_VENDOR_INTEL 0 | |
86 | #define X86_VENDOR_CYRIX 1 | |
87 | #define X86_VENDOR_AMD 2 | |
88 | #define X86_VENDOR_UMC 3 | |
89 | #define X86_VENDOR_NEXGEN 4 | |
90 | #define X86_VENDOR_CENTAUR 5 | |
91 | #define X86_VENDOR_RISE 6 | |
92 | #define X86_VENDOR_TRANSMETA 7 | |
93 | #define X86_VENDOR_NSC 8 | |
94 | #define X86_VENDOR_NUM 9 | |
95 | #define X86_VENDOR_UNKNOWN 0xff | |
96 | ||
97 | /* | |
98 | * capabilities of CPUs | |
99 | */ | |
100 | ||
101 | extern struct cpuinfo_x86 boot_cpu_data; | |
102 | extern struct cpuinfo_x86 new_cpu_data; | |
103 | extern struct tss_struct doublefault_tss; | |
104 | DECLARE_PER_CPU(struct tss_struct, init_tss); | |
105 | ||
106 | #ifdef CONFIG_SMP | |
107 | extern struct cpuinfo_x86 cpu_data[]; | |
108 | #define current_cpu_data cpu_data[smp_processor_id()] | |
109 | #else | |
110 | #define cpu_data (&boot_cpu_data) | |
111 | #define current_cpu_data boot_cpu_data | |
112 | #endif | |
113 | ||
1e9f28fa | 114 | extern int cpu_llc_id[NR_CPUS]; |
1da177e4 LT |
115 | extern char ignore_fpu_irq; |
116 | ||
d7cd5611 RR |
117 | void __init cpu_detect(struct cpuinfo_x86 *c); |
118 | ||
a6c4e076 JF |
119 | extern void identify_boot_cpu(void); |
120 | extern void identify_secondary_cpu(struct cpuinfo_x86 *); | |
1da177e4 LT |
121 | extern void print_cpu_info(struct cpuinfo_x86 *); |
122 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); | |
240cd6a8 | 123 | extern unsigned short num_cache_leaves; |
1da177e4 LT |
124 | |
125 | #ifdef CONFIG_X86_HT | |
126 | extern void detect_ht(struct cpuinfo_x86 *c); | |
127 | #else | |
128 | static inline void detect_ht(struct cpuinfo_x86 *c) {} | |
129 | #endif | |
130 | ||
90a0a06a | 131 | static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, |
d3561b7f | 132 | unsigned int *ecx, unsigned int *edx) |
9f093394 RR |
133 | { |
134 | /* ecx is often an input as well as an output. */ | |
135 | __asm__("cpuid" | |
136 | : "=a" (*eax), | |
137 | "=b" (*ebx), | |
138 | "=c" (*ecx), | |
139 | "=d" (*edx) | |
140 | : "0" (*eax), "2" (*ecx)); | |
141 | } | |
142 | ||
4bb0d3ec | 143 | #define load_cr3(pgdir) write_cr3(__pa(pgdir)) |
1da177e4 | 144 | |
1da177e4 LT |
145 | /* |
146 | * Save the cr4 feature set we're using (ie | |
147 | * Pentium 4MB enable and PPro Global page | |
148 | * enable), so that any CPU's that boot up | |
149 | * after us can get the correct flags. | |
150 | */ | |
151 | extern unsigned long mmu_cr4_features; | |
152 | ||
153 | static inline void set_in_cr4 (unsigned long mask) | |
154 | { | |
4bb0d3ec | 155 | unsigned cr4; |
1da177e4 | 156 | mmu_cr4_features |= mask; |
4bb0d3ec ZA |
157 | cr4 = read_cr4(); |
158 | cr4 |= mask; | |
159 | write_cr4(cr4); | |
1da177e4 LT |
160 | } |
161 | ||
162 | static inline void clear_in_cr4 (unsigned long mask) | |
163 | { | |
4bb0d3ec | 164 | unsigned cr4; |
1da177e4 | 165 | mmu_cr4_features &= ~mask; |
4bb0d3ec ZA |
166 | cr4 = read_cr4(); |
167 | cr4 &= ~mask; | |
168 | write_cr4(cr4); | |
1da177e4 LT |
169 | } |
170 | ||
1da177e4 LT |
171 | /* |
172 | * NSC/Cyrix CPU indexed register access macros | |
173 | */ | |
174 | ||
175 | #define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); }) | |
176 | ||
177 | #define setCx86(reg, data) do { \ | |
178 | outb((reg), 0x22); \ | |
179 | outb((data), 0x23); \ | |
180 | } while (0) | |
181 | ||
487472bc AK |
182 | /* Stop speculative execution */ |
183 | static inline void sync_core(void) | |
245067d1 | 184 | { |
487472bc AK |
185 | int tmp; |
186 | asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory"); | |
245067d1 ZA |
187 | } |
188 | ||
1da177e4 LT |
189 | static inline void __monitor(const void *eax, unsigned long ecx, |
190 | unsigned long edx) | |
191 | { | |
192 | /* "monitor %eax,%ecx,%edx;" */ | |
193 | asm volatile( | |
194 | ".byte 0x0f,0x01,0xc8;" | |
195 | : :"a" (eax), "c" (ecx), "d"(edx)); | |
196 | } | |
197 | ||
198 | static inline void __mwait(unsigned long eax, unsigned long ecx) | |
199 | { | |
200 | /* "mwait %eax,%ecx;" */ | |
201 | asm volatile( | |
202 | ".byte 0x0f,0x01,0xc9;" | |
203 | : :"a" (eax), "c" (ecx)); | |
204 | } | |
205 | ||
991528d7 VP |
206 | extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx); |
207 | ||
1da177e4 LT |
208 | /* from system description table in BIOS. Mostly for MCA use, but |
209 | others may find it useful. */ | |
210 | extern unsigned int machine_id; | |
211 | extern unsigned int machine_submodel_id; | |
212 | extern unsigned int BIOS_revision; | |
213 | extern unsigned int mca_pentium_flag; | |
214 | ||
215 | /* Boot loader type from the setup header */ | |
216 | extern int bootloader_type; | |
217 | ||
218 | /* | |
219 | * User space process size: 3GB (default). | |
220 | */ | |
221 | #define TASK_SIZE (PAGE_OFFSET) | |
222 | ||
223 | /* This decides where the kernel will search for a free chunk of vm | |
224 | * space during mmap's. | |
225 | */ | |
226 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) | |
227 | ||
228 | #define HAVE_ARCH_PICK_MMAP_LAYOUT | |
229 | ||
230 | /* | |
231 | * Size of io_bitmap. | |
232 | */ | |
233 | #define IO_BITMAP_BITS 65536 | |
234 | #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) | |
235 | #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) | |
236 | #define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap) | |
237 | #define INVALID_IO_BITMAP_OFFSET 0x8000 | |
238 | #define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000 | |
239 | ||
240 | struct i387_fsave_struct { | |
241 | long cwd; | |
242 | long swd; | |
243 | long twd; | |
244 | long fip; | |
245 | long fcs; | |
246 | long foo; | |
247 | long fos; | |
248 | long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */ | |
249 | long status; /* software status information */ | |
250 | }; | |
251 | ||
252 | struct i387_fxsave_struct { | |
253 | unsigned short cwd; | |
254 | unsigned short swd; | |
255 | unsigned short twd; | |
256 | unsigned short fop; | |
257 | long fip; | |
258 | long fcs; | |
259 | long foo; | |
260 | long fos; | |
261 | long mxcsr; | |
262 | long mxcsr_mask; | |
263 | long st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
264 | long xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
265 | long padding[56]; | |
266 | } __attribute__ ((aligned (16))); | |
267 | ||
268 | struct i387_soft_struct { | |
269 | long cwd; | |
270 | long swd; | |
271 | long twd; | |
272 | long fip; | |
273 | long fcs; | |
274 | long foo; | |
275 | long fos; | |
276 | long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */ | |
277 | unsigned char ftop, changed, lookahead, no_update, rm, alimit; | |
278 | struct info *info; | |
279 | unsigned long entry_eip; | |
280 | }; | |
281 | ||
282 | union i387_union { | |
283 | struct i387_fsave_struct fsave; | |
284 | struct i387_fxsave_struct fxsave; | |
285 | struct i387_soft_struct soft; | |
286 | }; | |
287 | ||
288 | typedef struct { | |
289 | unsigned long seg; | |
290 | } mm_segment_t; | |
291 | ||
292 | struct thread_struct; | |
293 | ||
a75c54f9 RR |
294 | /* This is the TSS defined by the hardware. */ |
295 | struct i386_hw_tss { | |
1da177e4 LT |
296 | unsigned short back_link,__blh; |
297 | unsigned long esp0; | |
298 | unsigned short ss0,__ss0h; | |
299 | unsigned long esp1; | |
300 | unsigned short ss1,__ss1h; /* ss1 is used to cache MSR_IA32_SYSENTER_CS */ | |
301 | unsigned long esp2; | |
302 | unsigned short ss2,__ss2h; | |
303 | unsigned long __cr3; | |
304 | unsigned long eip; | |
305 | unsigned long eflags; | |
306 | unsigned long eax,ecx,edx,ebx; | |
307 | unsigned long esp; | |
308 | unsigned long ebp; | |
309 | unsigned long esi; | |
310 | unsigned long edi; | |
311 | unsigned short es, __esh; | |
312 | unsigned short cs, __csh; | |
313 | unsigned short ss, __ssh; | |
314 | unsigned short ds, __dsh; | |
315 | unsigned short fs, __fsh; | |
316 | unsigned short gs, __gsh; | |
317 | unsigned short ldt, __ldth; | |
318 | unsigned short trace, io_bitmap_base; | |
a75c54f9 RR |
319 | } __attribute__((packed)); |
320 | ||
321 | struct tss_struct { | |
322 | struct i386_hw_tss x86_tss; | |
323 | ||
1da177e4 LT |
324 | /* |
325 | * The extra 1 is there because the CPU will access an | |
326 | * additional byte beyond the end of the IO permission | |
327 | * bitmap. The extra byte must be all 1 bits, and must | |
328 | * be within the limit. | |
329 | */ | |
330 | unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; | |
331 | /* | |
332 | * Cache the current maximum and the last task that used the bitmap: | |
333 | */ | |
334 | unsigned long io_bitmap_max; | |
335 | struct thread_struct *io_bitmap_owner; | |
336 | /* | |
337 | * pads the TSS to be cacheline-aligned (size is 0x100) | |
338 | */ | |
339 | unsigned long __cacheline_filler[35]; | |
340 | /* | |
341 | * .. and then another 0x100 bytes for emergency kernel stack | |
342 | */ | |
343 | unsigned long stack[64]; | |
344 | } __attribute__((packed)); | |
345 | ||
346 | #define ARCH_MIN_TASKALIGN 16 | |
347 | ||
348 | struct thread_struct { | |
349 | /* cached TLS descriptors. */ | |
350 | struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; | |
351 | unsigned long esp0; | |
352 | unsigned long sysenter_cs; | |
353 | unsigned long eip; | |
354 | unsigned long esp; | |
355 | unsigned long fs; | |
356 | unsigned long gs; | |
357 | /* Hardware debugging registers */ | |
358 | unsigned long debugreg[8]; /* %%db0-7 debug registers */ | |
359 | /* fault info */ | |
360 | unsigned long cr2, trap_no, error_code; | |
361 | /* floating point info */ | |
362 | union i387_union i387; | |
363 | /* virtual 86 mode info */ | |
364 | struct vm86_struct __user * vm86_info; | |
365 | unsigned long screen_bitmap; | |
366 | unsigned long v86flags, v86mask, saved_esp0; | |
367 | unsigned int saved_fs, saved_gs; | |
368 | /* IO permissions */ | |
369 | unsigned long *io_bitmap_ptr; | |
a5201129 | 370 | unsigned long iopl; |
1da177e4 LT |
371 | /* max allowed port in the bitmap, in bytes: */ |
372 | unsigned long io_bitmap_max; | |
373 | }; | |
374 | ||
375 | #define INIT_THREAD { \ | |
692174b9 | 376 | .esp0 = sizeof(init_stack) + (long)&init_stack, \ |
1da177e4 LT |
377 | .vm86_info = NULL, \ |
378 | .sysenter_cs = __KERNEL_CS, \ | |
379 | .io_bitmap_ptr = NULL, \ | |
7c3576d2 | 380 | .fs = __KERNEL_PERCPU, \ |
1da177e4 LT |
381 | } |
382 | ||
383 | /* | |
384 | * Note that the .io_bitmap member must be extra-big. This is because | |
385 | * the CPU will access an additional byte beyond the end of the IO | |
386 | * permission bitmap. The extra byte must be all 1 bits, and must | |
387 | * be within the limit. | |
388 | */ | |
389 | #define INIT_TSS { \ | |
a75c54f9 RR |
390 | .x86_tss = { \ |
391 | .esp0 = sizeof(init_stack) + (long)&init_stack, \ | |
392 | .ss0 = __KERNEL_DS, \ | |
393 | .ss1 = __KERNEL_CS, \ | |
394 | .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ | |
395 | }, \ | |
1da177e4 LT |
396 | .io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \ |
397 | } | |
398 | ||
1da177e4 | 399 | #define start_thread(regs, new_eip, new_esp) do { \ |
464d1a78 JF |
400 | __asm__("movl %0,%%gs": :"r" (0)); \ |
401 | regs->xfs = 0; \ | |
1da177e4 LT |
402 | set_fs(USER_DS); \ |
403 | regs->xds = __USER_DS; \ | |
404 | regs->xes = __USER_DS; \ | |
405 | regs->xss = __USER_DS; \ | |
406 | regs->xcs = __USER_CS; \ | |
407 | regs->eip = new_eip; \ | |
408 | regs->esp = new_esp; \ | |
409 | } while (0) | |
410 | ||
411 | /* Forward declaration, a strange C thing */ | |
412 | struct task_struct; | |
413 | struct mm_struct; | |
414 | ||
415 | /* Free all resources held by a thread. */ | |
416 | extern void release_thread(struct task_struct *); | |
417 | ||
418 | /* Prepare to copy thread state - unlazy all lazy status */ | |
419 | extern void prepare_to_copy(struct task_struct *tsk); | |
420 | ||
421 | /* | |
422 | * create a kernel thread without removing it from tasklists | |
423 | */ | |
424 | extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); | |
425 | ||
426 | extern unsigned long thread_saved_pc(struct task_struct *tsk); | |
176a2718 | 427 | void show_trace(struct task_struct *task, struct pt_regs *regs, unsigned long *stack); |
1da177e4 LT |
428 | |
429 | unsigned long get_wchan(struct task_struct *p); | |
430 | ||
431 | #define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long)) | |
432 | #define KSTK_TOP(info) \ | |
433 | ({ \ | |
434 | unsigned long *__ptr = (unsigned long *)(info); \ | |
435 | (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \ | |
436 | }) | |
437 | ||
07b047fc AM |
438 | /* |
439 | * The below -8 is to reserve 8 bytes on top of the ring0 stack. | |
440 | * This is necessary to guarantee that the entire "struct pt_regs" | |
441 | * is accessable even if the CPU haven't stored the SS/ESP registers | |
442 | * on the stack (interrupt gate does not save these registers | |
443 | * when switching to the same priv ring). | |
444 | * Therefore beware: accessing the xss/esp fields of the | |
445 | * "struct pt_regs" is possible, but they may contain the | |
446 | * completely wrong values. | |
447 | */ | |
1da177e4 LT |
448 | #define task_pt_regs(task) \ |
449 | ({ \ | |
450 | struct pt_regs *__regs__; \ | |
65e0fdff | 451 | __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \ |
1da177e4 LT |
452 | __regs__ - 1; \ |
453 | }) | |
454 | ||
455 | #define KSTK_EIP(task) (task_pt_regs(task)->eip) | |
456 | #define KSTK_ESP(task) (task_pt_regs(task)->esp) | |
457 | ||
458 | ||
459 | struct microcode_header { | |
460 | unsigned int hdrver; | |
461 | unsigned int rev; | |
462 | unsigned int date; | |
463 | unsigned int sig; | |
464 | unsigned int cksum; | |
465 | unsigned int ldrver; | |
466 | unsigned int pf; | |
467 | unsigned int datasize; | |
468 | unsigned int totalsize; | |
469 | unsigned int reserved[3]; | |
470 | }; | |
471 | ||
472 | struct microcode { | |
473 | struct microcode_header hdr; | |
474 | unsigned int bits[0]; | |
475 | }; | |
476 | ||
477 | typedef struct microcode microcode_t; | |
478 | typedef struct microcode_header microcode_header_t; | |
479 | ||
480 | /* microcode format is extended from prescott processors */ | |
481 | struct extended_signature { | |
482 | unsigned int sig; | |
483 | unsigned int pf; | |
484 | unsigned int cksum; | |
485 | }; | |
486 | ||
487 | struct extended_sigtable { | |
488 | unsigned int count; | |
489 | unsigned int cksum; | |
490 | unsigned int reserved[3]; | |
491 | struct extended_signature sigs[0]; | |
492 | }; | |
1da177e4 LT |
493 | |
494 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ | |
495 | static inline void rep_nop(void) | |
496 | { | |
497 | __asm__ __volatile__("rep;nop": : :"memory"); | |
498 | } | |
499 | ||
500 | #define cpu_relax() rep_nop() | |
501 | ||
90a0a06a | 502 | static inline void native_load_esp0(struct tss_struct *tss, struct thread_struct *thread) |
139ec7c4 | 503 | { |
a75c54f9 | 504 | tss->x86_tss.esp0 = thread->esp0; |
139ec7c4 | 505 | /* This can only happen when SEP is enabled, no need to test "SEP"arately */ |
a75c54f9 RR |
506 | if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { |
507 | tss->x86_tss.ss1 = thread->sysenter_cs; | |
139ec7c4 RR |
508 | wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); |
509 | } | |
510 | } | |
511 | ||
139ec7c4 | 512 | |
90a0a06a RR |
513 | static inline unsigned long native_get_debugreg(int regno) |
514 | { | |
515 | unsigned long val = 0; /* Damn you, gcc! */ | |
516 | ||
517 | switch (regno) { | |
518 | case 0: | |
519 | asm("movl %%db0, %0" :"=r" (val)); break; | |
520 | case 1: | |
521 | asm("movl %%db1, %0" :"=r" (val)); break; | |
522 | case 2: | |
523 | asm("movl %%db2, %0" :"=r" (val)); break; | |
524 | case 3: | |
525 | asm("movl %%db3, %0" :"=r" (val)); break; | |
526 | case 6: | |
527 | asm("movl %%db6, %0" :"=r" (val)); break; | |
528 | case 7: | |
529 | asm("movl %%db7, %0" :"=r" (val)); break; | |
530 | default: | |
531 | BUG(); | |
532 | } | |
533 | return val; | |
534 | } | |
535 | ||
536 | static inline void native_set_debugreg(int regno, unsigned long value) | |
537 | { | |
538 | switch (regno) { | |
539 | case 0: | |
540 | asm("movl %0,%%db0" : /* no output */ :"r" (value)); | |
541 | break; | |
542 | case 1: | |
543 | asm("movl %0,%%db1" : /* no output */ :"r" (value)); | |
544 | break; | |
545 | case 2: | |
546 | asm("movl %0,%%db2" : /* no output */ :"r" (value)); | |
547 | break; | |
548 | case 3: | |
549 | asm("movl %0,%%db3" : /* no output */ :"r" (value)); | |
550 | break; | |
551 | case 6: | |
552 | asm("movl %0,%%db6" : /* no output */ :"r" (value)); | |
553 | break; | |
554 | case 7: | |
555 | asm("movl %0,%%db7" : /* no output */ :"r" (value)); | |
556 | break; | |
557 | default: | |
558 | BUG(); | |
559 | } | |
560 | } | |
139ec7c4 RR |
561 | |
562 | /* | |
563 | * Set IOPL bits in EFLAGS from given mask | |
564 | */ | |
90a0a06a | 565 | static inline void native_set_iopl_mask(unsigned mask) |
139ec7c4 RR |
566 | { |
567 | unsigned int reg; | |
568 | __asm__ __volatile__ ("pushfl;" | |
569 | "popl %0;" | |
570 | "andl %1, %0;" | |
571 | "orl %2, %0;" | |
572 | "pushl %0;" | |
573 | "popfl" | |
574 | : "=&r" (reg) | |
575 | : "i" (~X86_EFLAGS_IOPL), "r" (mask)); | |
576 | } | |
577 | ||
90a0a06a RR |
578 | #ifdef CONFIG_PARAVIRT |
579 | #include <asm/paravirt.h> | |
580 | #else | |
581 | #define paravirt_enabled() 0 | |
582 | #define __cpuid native_cpuid | |
583 | ||
584 | static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread) | |
585 | { | |
586 | native_load_esp0(tss, thread); | |
587 | } | |
588 | ||
589 | /* | |
590 | * These special macros can be used to get or set a debugging register | |
591 | */ | |
592 | #define get_debugreg(var, register) \ | |
593 | (var) = native_get_debugreg(register) | |
594 | #define set_debugreg(value, register) \ | |
595 | native_set_debugreg(register, value) | |
596 | ||
597 | #define set_iopl_mask native_set_iopl_mask | |
598 | #endif /* CONFIG_PARAVIRT */ | |
599 | ||
139ec7c4 RR |
600 | /* |
601 | * Generic CPUID function | |
602 | * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx | |
603 | * resulting in stale register contents being returned. | |
604 | */ | |
605 | static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx) | |
606 | { | |
607 | *eax = op; | |
608 | *ecx = 0; | |
609 | __cpuid(eax, ebx, ecx, edx); | |
610 | } | |
611 | ||
612 | /* Some CPUID calls want 'count' to be placed in ecx */ | |
613 | static inline void cpuid_count(int op, int count, int *eax, int *ebx, int *ecx, | |
614 | int *edx) | |
615 | { | |
616 | *eax = op; | |
617 | *ecx = count; | |
618 | __cpuid(eax, ebx, ecx, edx); | |
619 | } | |
620 | ||
621 | /* | |
622 | * CPUID functions returning a single datum | |
623 | */ | |
624 | static inline unsigned int cpuid_eax(unsigned int op) | |
625 | { | |
626 | unsigned int eax, ebx, ecx, edx; | |
627 | ||
628 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
629 | return eax; | |
630 | } | |
631 | static inline unsigned int cpuid_ebx(unsigned int op) | |
632 | { | |
633 | unsigned int eax, ebx, ecx, edx; | |
634 | ||
635 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
636 | return ebx; | |
637 | } | |
638 | static inline unsigned int cpuid_ecx(unsigned int op) | |
639 | { | |
640 | unsigned int eax, ebx, ecx, edx; | |
641 | ||
642 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
643 | return ecx; | |
644 | } | |
645 | static inline unsigned int cpuid_edx(unsigned int op) | |
646 | { | |
647 | unsigned int eax, ebx, ecx, edx; | |
648 | ||
649 | cpuid(op, &eax, &ebx, &ecx, &edx); | |
650 | return edx; | |
651 | } | |
652 | ||
1da177e4 LT |
653 | /* generic versions from gas */ |
654 | #define GENERIC_NOP1 ".byte 0x90\n" | |
655 | #define GENERIC_NOP2 ".byte 0x89,0xf6\n" | |
656 | #define GENERIC_NOP3 ".byte 0x8d,0x76,0x00\n" | |
657 | #define GENERIC_NOP4 ".byte 0x8d,0x74,0x26,0x00\n" | |
658 | #define GENERIC_NOP5 GENERIC_NOP1 GENERIC_NOP4 | |
659 | #define GENERIC_NOP6 ".byte 0x8d,0xb6,0x00,0x00,0x00,0x00\n" | |
660 | #define GENERIC_NOP7 ".byte 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00\n" | |
661 | #define GENERIC_NOP8 GENERIC_NOP1 GENERIC_NOP7 | |
662 | ||
663 | /* Opteron nops */ | |
664 | #define K8_NOP1 GENERIC_NOP1 | |
665 | #define K8_NOP2 ".byte 0x66,0x90\n" | |
666 | #define K8_NOP3 ".byte 0x66,0x66,0x90\n" | |
667 | #define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n" | |
668 | #define K8_NOP5 K8_NOP3 K8_NOP2 | |
669 | #define K8_NOP6 K8_NOP3 K8_NOP3 | |
670 | #define K8_NOP7 K8_NOP4 K8_NOP3 | |
671 | #define K8_NOP8 K8_NOP4 K8_NOP4 | |
672 | ||
673 | /* K7 nops */ | |
674 | /* uses eax dependencies (arbitary choice) */ | |
675 | #define K7_NOP1 GENERIC_NOP1 | |
676 | #define K7_NOP2 ".byte 0x8b,0xc0\n" | |
677 | #define K7_NOP3 ".byte 0x8d,0x04,0x20\n" | |
678 | #define K7_NOP4 ".byte 0x8d,0x44,0x20,0x00\n" | |
679 | #define K7_NOP5 K7_NOP4 ASM_NOP1 | |
680 | #define K7_NOP6 ".byte 0x8d,0x80,0,0,0,0\n" | |
681 | #define K7_NOP7 ".byte 0x8D,0x04,0x05,0,0,0,0\n" | |
682 | #define K7_NOP8 K7_NOP7 ASM_NOP1 | |
683 | ||
684 | #ifdef CONFIG_MK8 | |
685 | #define ASM_NOP1 K8_NOP1 | |
686 | #define ASM_NOP2 K8_NOP2 | |
687 | #define ASM_NOP3 K8_NOP3 | |
688 | #define ASM_NOP4 K8_NOP4 | |
689 | #define ASM_NOP5 K8_NOP5 | |
690 | #define ASM_NOP6 K8_NOP6 | |
691 | #define ASM_NOP7 K8_NOP7 | |
692 | #define ASM_NOP8 K8_NOP8 | |
693 | #elif defined(CONFIG_MK7) | |
694 | #define ASM_NOP1 K7_NOP1 | |
695 | #define ASM_NOP2 K7_NOP2 | |
696 | #define ASM_NOP3 K7_NOP3 | |
697 | #define ASM_NOP4 K7_NOP4 | |
698 | #define ASM_NOP5 K7_NOP5 | |
699 | #define ASM_NOP6 K7_NOP6 | |
700 | #define ASM_NOP7 K7_NOP7 | |
701 | #define ASM_NOP8 K7_NOP8 | |
702 | #else | |
703 | #define ASM_NOP1 GENERIC_NOP1 | |
704 | #define ASM_NOP2 GENERIC_NOP2 | |
705 | #define ASM_NOP3 GENERIC_NOP3 | |
706 | #define ASM_NOP4 GENERIC_NOP4 | |
707 | #define ASM_NOP5 GENERIC_NOP5 | |
708 | #define ASM_NOP6 GENERIC_NOP6 | |
709 | #define ASM_NOP7 GENERIC_NOP7 | |
710 | #define ASM_NOP8 GENERIC_NOP8 | |
711 | #endif | |
712 | ||
713 | #define ASM_NOP_MAX 8 | |
714 | ||
715 | /* Prefetch instructions for Pentium III and AMD Athlon */ | |
716 | /* It's not worth to care about 3dnow! prefetches for the K6 | |
717 | because they are microcoded there and very slow. | |
718 | However we don't do prefetches for pre XP Athlons currently | |
719 | That should be fixed. */ | |
720 | #define ARCH_HAS_PREFETCH | |
e2afe674 | 721 | static inline void prefetch(const void *x) |
1da177e4 LT |
722 | { |
723 | alternative_input(ASM_NOP4, | |
724 | "prefetchnta (%1)", | |
725 | X86_FEATURE_XMM, | |
726 | "r" (x)); | |
727 | } | |
728 | ||
729 | #define ARCH_HAS_PREFETCH | |
730 | #define ARCH_HAS_PREFETCHW | |
731 | #define ARCH_HAS_SPINLOCK_PREFETCH | |
732 | ||
733 | /* 3dnow! prefetch to get an exclusive cache line. Useful for | |
734 | spinlocks to avoid one state transition in the cache coherency protocol. */ | |
e2afe674 | 735 | static inline void prefetchw(const void *x) |
1da177e4 LT |
736 | { |
737 | alternative_input(ASM_NOP4, | |
738 | "prefetchw (%1)", | |
739 | X86_FEATURE_3DNOW, | |
740 | "r" (x)); | |
741 | } | |
742 | #define spin_lock_prefetch(x) prefetchw(x) | |
743 | ||
744 | extern void select_idle_routine(const struct cpuinfo_x86 *c); | |
745 | ||
746 | #define cache_line_size() (boot_cpu_data.x86_cache_alignment) | |
747 | ||
748 | extern unsigned long boot_option_idle_override; | |
6fe940d6 LS |
749 | extern void enable_sep_cpu(void); |
750 | extern int sysenter_setup(void); | |
1da177e4 | 751 | |
9ee79a3d | 752 | extern void cpu_set_gdt(int); |
c5413fbe | 753 | extern void switch_to_new_gdt(void); |
d2cbcc49 | 754 | extern void cpu_init(void); |
62111195 | 755 | |
f039b754 AK |
756 | extern int force_mwait; |
757 | ||
1da177e4 | 758 | #endif /* __ASM_I386_PROCESSOR_H */ |