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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> | |
15 | #include <linux/config.h> | |
16 | #include <linux/threads.h> | |
17 | #include <asm/msr.h> | |
18 | #include <asm/current.h> | |
19 | #include <asm/system.h> | |
20 | #include <asm/mmsegment.h> | |
21 | #include <asm/percpu.h> | |
22 | #include <linux/personality.h> | |
23 | ||
24 | #define TF_MASK 0x00000100 | |
25 | #define IF_MASK 0x00000200 | |
26 | #define IOPL_MASK 0x00003000 | |
27 | #define NT_MASK 0x00004000 | |
28 | #define VM_MASK 0x00020000 | |
29 | #define AC_MASK 0x00040000 | |
30 | #define VIF_MASK 0x00080000 /* virtual interrupt flag */ | |
31 | #define VIP_MASK 0x00100000 /* virtual interrupt pending */ | |
32 | #define ID_MASK 0x00200000 | |
33 | ||
34 | #define desc_empty(desc) \ | |
35 | (!((desc)->a + (desc)->b)) | |
36 | ||
37 | #define desc_equal(desc1, desc2) \ | |
38 | (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b)) | |
39 | ||
40 | /* | |
41 | * Default implementation of macro that returns current | |
42 | * instruction pointer ("program counter"). | |
43 | */ | |
44 | #define current_text_addr() ({ void *pc; asm volatile("leaq 1f(%%rip),%0\n1:":"=r"(pc)); pc; }) | |
45 | ||
46 | /* | |
47 | * CPU type and hardware bug flags. Kept separately for each CPU. | |
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 | int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */ | |
56 | __u32 x86_capability[NCAPINTS]; | |
57 | char x86_vendor_id[16]; | |
58 | char x86_model_id[64]; | |
59 | int x86_cache_size; /* in KB */ | |
60 | int x86_clflush_size; | |
61 | int x86_cache_alignment; | |
62 | int x86_tlbsize; /* number of 4K pages in DTLB/ITLB combined(in pages)*/ | |
63 | __u8 x86_virt_bits, x86_phys_bits; | |
64 | __u8 x86_num_cores; | |
65 | __u8 x86_apicid; | |
66 | __u32 x86_power; | |
67 | __u32 x86_cpuid_level; /* Max CPUID function supported */ | |
68 | unsigned long loops_per_jiffy; | |
69 | } ____cacheline_aligned; | |
70 | ||
71 | #define X86_VENDOR_INTEL 0 | |
72 | #define X86_VENDOR_CYRIX 1 | |
73 | #define X86_VENDOR_AMD 2 | |
74 | #define X86_VENDOR_UMC 3 | |
75 | #define X86_VENDOR_NEXGEN 4 | |
76 | #define X86_VENDOR_CENTAUR 5 | |
77 | #define X86_VENDOR_RISE 6 | |
78 | #define X86_VENDOR_TRANSMETA 7 | |
79 | #define X86_VENDOR_NUM 8 | |
80 | #define X86_VENDOR_UNKNOWN 0xff | |
81 | ||
82 | #ifdef CONFIG_SMP | |
83 | extern struct cpuinfo_x86 cpu_data[]; | |
84 | #define current_cpu_data cpu_data[smp_processor_id()] | |
85 | #else | |
86 | #define cpu_data (&boot_cpu_data) | |
87 | #define current_cpu_data boot_cpu_data | |
88 | #endif | |
89 | ||
90 | extern char ignore_irq13; | |
91 | ||
92 | extern void identify_cpu(struct cpuinfo_x86 *); | |
93 | extern void print_cpu_info(struct cpuinfo_x86 *); | |
94 | extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); | |
95 | ||
96 | /* | |
97 | * EFLAGS bits | |
98 | */ | |
99 | #define X86_EFLAGS_CF 0x00000001 /* Carry Flag */ | |
100 | #define X86_EFLAGS_PF 0x00000004 /* Parity Flag */ | |
101 | #define X86_EFLAGS_AF 0x00000010 /* Auxillary carry Flag */ | |
102 | #define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */ | |
103 | #define X86_EFLAGS_SF 0x00000080 /* Sign Flag */ | |
104 | #define X86_EFLAGS_TF 0x00000100 /* Trap Flag */ | |
105 | #define X86_EFLAGS_IF 0x00000200 /* Interrupt Flag */ | |
106 | #define X86_EFLAGS_DF 0x00000400 /* Direction Flag */ | |
107 | #define X86_EFLAGS_OF 0x00000800 /* Overflow Flag */ | |
108 | #define X86_EFLAGS_IOPL 0x00003000 /* IOPL mask */ | |
109 | #define X86_EFLAGS_NT 0x00004000 /* Nested Task */ | |
110 | #define X86_EFLAGS_RF 0x00010000 /* Resume Flag */ | |
111 | #define X86_EFLAGS_VM 0x00020000 /* Virtual Mode */ | |
112 | #define X86_EFLAGS_AC 0x00040000 /* Alignment Check */ | |
113 | #define X86_EFLAGS_VIF 0x00080000 /* Virtual Interrupt Flag */ | |
114 | #define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */ | |
115 | #define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */ | |
116 | ||
117 | /* | |
118 | * Intel CPU features in CR4 | |
119 | */ | |
120 | #define X86_CR4_VME 0x0001 /* enable vm86 extensions */ | |
121 | #define X86_CR4_PVI 0x0002 /* virtual interrupts flag enable */ | |
122 | #define X86_CR4_TSD 0x0004 /* disable time stamp at ipl 3 */ | |
123 | #define X86_CR4_DE 0x0008 /* enable debugging extensions */ | |
124 | #define X86_CR4_PSE 0x0010 /* enable page size extensions */ | |
125 | #define X86_CR4_PAE 0x0020 /* enable physical address extensions */ | |
126 | #define X86_CR4_MCE 0x0040 /* Machine check enable */ | |
127 | #define X86_CR4_PGE 0x0080 /* enable global pages */ | |
128 | #define X86_CR4_PCE 0x0100 /* enable performance counters at ipl 3 */ | |
129 | #define X86_CR4_OSFXSR 0x0200 /* enable fast FPU save and restore */ | |
130 | #define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */ | |
131 | ||
132 | /* | |
133 | * Save the cr4 feature set we're using (ie | |
134 | * Pentium 4MB enable and PPro Global page | |
135 | * enable), so that any CPU's that boot up | |
136 | * after us can get the correct flags. | |
137 | */ | |
138 | extern unsigned long mmu_cr4_features; | |
139 | ||
140 | static inline void set_in_cr4 (unsigned long mask) | |
141 | { | |
142 | mmu_cr4_features |= mask; | |
143 | __asm__("movq %%cr4,%%rax\n\t" | |
144 | "orq %0,%%rax\n\t" | |
145 | "movq %%rax,%%cr4\n" | |
146 | : : "irg" (mask) | |
147 | :"ax"); | |
148 | } | |
149 | ||
150 | static inline void clear_in_cr4 (unsigned long mask) | |
151 | { | |
152 | mmu_cr4_features &= ~mask; | |
153 | __asm__("movq %%cr4,%%rax\n\t" | |
154 | "andq %0,%%rax\n\t" | |
155 | "movq %%rax,%%cr4\n" | |
156 | : : "irg" (~mask) | |
157 | :"ax"); | |
158 | } | |
159 | ||
160 | ||
161 | /* | |
162 | * User space process size. 47bits. | |
163 | */ | |
164 | #define TASK_SIZE (0x800000000000UL) | |
165 | ||
166 | /* This decides where the kernel will search for a free chunk of vm | |
167 | * space during mmap's. | |
168 | */ | |
169 | #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000) | |
170 | #define TASK_UNMAPPED_32 PAGE_ALIGN(IA32_PAGE_OFFSET/3) | |
171 | #define TASK_UNMAPPED_64 PAGE_ALIGN(TASK_SIZE/3) | |
172 | #define TASK_UNMAPPED_BASE \ | |
173 | (test_thread_flag(TIF_IA32) ? TASK_UNMAPPED_32 : TASK_UNMAPPED_64) | |
174 | ||
175 | /* | |
176 | * Size of io_bitmap. | |
177 | */ | |
178 | #define IO_BITMAP_BITS 65536 | |
179 | #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) | |
180 | #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) | |
181 | #define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap) | |
182 | #define INVALID_IO_BITMAP_OFFSET 0x8000 | |
183 | ||
184 | struct i387_fxsave_struct { | |
185 | u16 cwd; | |
186 | u16 swd; | |
187 | u16 twd; | |
188 | u16 fop; | |
189 | u64 rip; | |
190 | u64 rdp; | |
191 | u32 mxcsr; | |
192 | u32 mxcsr_mask; | |
193 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
194 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 128 bytes */ | |
195 | u32 padding[24]; | |
196 | } __attribute__ ((aligned (16))); | |
197 | ||
198 | union i387_union { | |
199 | struct i387_fxsave_struct fxsave; | |
200 | }; | |
201 | ||
202 | struct tss_struct { | |
203 | u32 reserved1; | |
204 | u64 rsp0; | |
205 | u64 rsp1; | |
206 | u64 rsp2; | |
207 | u64 reserved2; | |
208 | u64 ist[7]; | |
209 | u32 reserved3; | |
210 | u32 reserved4; | |
211 | u16 reserved5; | |
212 | u16 io_bitmap_base; | |
213 | /* | |
214 | * The extra 1 is there because the CPU will access an | |
215 | * additional byte beyond the end of the IO permission | |
216 | * bitmap. The extra byte must be all 1 bits, and must | |
217 | * be within the limit. Thus we have: | |
218 | * | |
219 | * 128 bytes, the bitmap itself, for ports 0..0x3ff | |
220 | * 8 bytes, for an extra "long" of ~0UL | |
221 | */ | |
222 | unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; | |
223 | } __attribute__((packed)) ____cacheline_aligned; | |
224 | ||
225 | extern struct cpuinfo_x86 boot_cpu_data; | |
226 | DECLARE_PER_CPU(struct tss_struct,init_tss); | |
227 | ||
228 | #define ARCH_MIN_TASKALIGN 16 | |
229 | ||
230 | struct thread_struct { | |
231 | unsigned long rsp0; | |
232 | unsigned long rsp; | |
233 | unsigned long userrsp; /* Copy from PDA */ | |
234 | unsigned long fs; | |
235 | unsigned long gs; | |
236 | unsigned short es, ds, fsindex, gsindex; | |
237 | /* Hardware debugging registers */ | |
238 | unsigned long debugreg0; | |
239 | unsigned long debugreg1; | |
240 | unsigned long debugreg2; | |
241 | unsigned long debugreg3; | |
242 | unsigned long debugreg6; | |
243 | unsigned long debugreg7; | |
244 | /* fault info */ | |
245 | unsigned long cr2, trap_no, error_code; | |
246 | /* floating point info */ | |
247 | union i387_union i387 __attribute__((aligned(16))); | |
248 | /* IO permissions. the bitmap could be moved into the GDT, that would make | |
249 | switch faster for a limited number of ioperm using tasks. -AK */ | |
250 | int ioperm; | |
251 | unsigned long *io_bitmap_ptr; | |
252 | unsigned io_bitmap_max; | |
253 | /* cached TLS descriptors. */ | |
254 | u64 tls_array[GDT_ENTRY_TLS_ENTRIES]; | |
255 | } __attribute__((aligned(16))); | |
256 | ||
257 | #define INIT_THREAD {} | |
258 | ||
259 | #define INIT_MMAP \ | |
260 | { &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL } | |
261 | ||
262 | #define STACKFAULT_STACK 1 | |
263 | #define DOUBLEFAULT_STACK 2 | |
264 | #define NMI_STACK 3 | |
265 | #define DEBUG_STACK 4 | |
266 | #define MCE_STACK 5 | |
267 | #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */ | |
268 | #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) | |
269 | #define EXCEPTION_STACK_ORDER 0 | |
270 | ||
271 | #define start_thread(regs,new_rip,new_rsp) do { \ | |
272 | asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \ | |
273 | load_gs_index(0); \ | |
274 | (regs)->rip = (new_rip); \ | |
275 | (regs)->rsp = (new_rsp); \ | |
276 | write_pda(oldrsp, (new_rsp)); \ | |
277 | (regs)->cs = __USER_CS; \ | |
278 | (regs)->ss = __USER_DS; \ | |
279 | (regs)->eflags = 0x200; \ | |
280 | set_fs(USER_DS); \ | |
281 | } while(0) | |
282 | ||
283 | struct task_struct; | |
284 | struct mm_struct; | |
285 | ||
286 | /* Free all resources held by a thread. */ | |
287 | extern void release_thread(struct task_struct *); | |
288 | ||
289 | /* Prepare to copy thread state - unlazy all lazy status */ | |
290 | extern void prepare_to_copy(struct task_struct *tsk); | |
291 | ||
292 | /* | |
293 | * create a kernel thread without removing it from tasklists | |
294 | */ | |
295 | extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); | |
296 | ||
297 | /* | |
298 | * Return saved PC of a blocked thread. | |
299 | * What is this good for? it will be always the scheduler or ret_from_fork. | |
300 | */ | |
301 | #define thread_saved_pc(t) (*(unsigned long *)((t)->thread.rsp - 8)) | |
302 | ||
303 | extern unsigned long get_wchan(struct task_struct *p); | |
304 | #define KSTK_EIP(tsk) \ | |
305 | (((struct pt_regs *)(tsk->thread.rsp0 - sizeof(struct pt_regs)))->rip) | |
306 | #define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */ | |
307 | ||
308 | ||
309 | struct microcode_header { | |
310 | unsigned int hdrver; | |
311 | unsigned int rev; | |
312 | unsigned int date; | |
313 | unsigned int sig; | |
314 | unsigned int cksum; | |
315 | unsigned int ldrver; | |
316 | unsigned int pf; | |
317 | unsigned int datasize; | |
318 | unsigned int totalsize; | |
319 | unsigned int reserved[3]; | |
320 | }; | |
321 | ||
322 | struct microcode { | |
323 | struct microcode_header hdr; | |
324 | unsigned int bits[0]; | |
325 | }; | |
326 | ||
327 | typedef struct microcode microcode_t; | |
328 | typedef struct microcode_header microcode_header_t; | |
329 | ||
330 | /* microcode format is extended from prescott processors */ | |
331 | struct extended_signature { | |
332 | unsigned int sig; | |
333 | unsigned int pf; | |
334 | unsigned int cksum; | |
335 | }; | |
336 | ||
337 | struct extended_sigtable { | |
338 | unsigned int count; | |
339 | unsigned int cksum; | |
340 | unsigned int reserved[3]; | |
341 | struct extended_signature sigs[0]; | |
342 | }; | |
343 | ||
344 | /* '6' because it used to be for P6 only (but now covers Pentium 4 as well) */ | |
345 | #define MICROCODE_IOCFREE _IO('6',0) | |
346 | ||
347 | ||
348 | #define ASM_NOP1 K8_NOP1 | |
349 | #define ASM_NOP2 K8_NOP2 | |
350 | #define ASM_NOP3 K8_NOP3 | |
351 | #define ASM_NOP4 K8_NOP4 | |
352 | #define ASM_NOP5 K8_NOP5 | |
353 | #define ASM_NOP6 K8_NOP6 | |
354 | #define ASM_NOP7 K8_NOP7 | |
355 | #define ASM_NOP8 K8_NOP8 | |
356 | ||
357 | /* Opteron nops */ | |
358 | #define K8_NOP1 ".byte 0x90\n" | |
359 | #define K8_NOP2 ".byte 0x66,0x90\n" | |
360 | #define K8_NOP3 ".byte 0x66,0x66,0x90\n" | |
361 | #define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n" | |
362 | #define K8_NOP5 K8_NOP3 K8_NOP2 | |
363 | #define K8_NOP6 K8_NOP3 K8_NOP3 | |
364 | #define K8_NOP7 K8_NOP4 K8_NOP3 | |
365 | #define K8_NOP8 K8_NOP4 K8_NOP4 | |
366 | ||
367 | #define ASM_NOP_MAX 8 | |
368 | ||
369 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ | |
370 | extern inline void rep_nop(void) | |
371 | { | |
372 | __asm__ __volatile__("rep;nop": : :"memory"); | |
373 | } | |
374 | ||
375 | /* Stop speculative execution */ | |
376 | extern inline void sync_core(void) | |
377 | { | |
378 | int tmp; | |
379 | asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory"); | |
380 | } | |
381 | ||
382 | #define cpu_has_fpu 1 | |
383 | ||
384 | #define ARCH_HAS_PREFETCH | |
385 | static inline void prefetch(void *x) | |
386 | { | |
387 | asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x)); | |
388 | } | |
389 | ||
390 | #define ARCH_HAS_PREFETCHW 1 | |
391 | static inline void prefetchw(void *x) | |
392 | { | |
393 | alternative_input(ASM_NOP5, | |
394 | "prefetchw (%1)", | |
395 | X86_FEATURE_3DNOW, | |
396 | "r" (x)); | |
397 | } | |
398 | ||
399 | #define ARCH_HAS_SPINLOCK_PREFETCH 1 | |
400 | ||
401 | #define spin_lock_prefetch(x) prefetchw(x) | |
402 | ||
403 | #define cpu_relax() rep_nop() | |
404 | ||
405 | /* | |
406 | * NSC/Cyrix CPU configuration register indexes | |
407 | */ | |
408 | #define CX86_CCR0 0xc0 | |
409 | #define CX86_CCR1 0xc1 | |
410 | #define CX86_CCR2 0xc2 | |
411 | #define CX86_CCR3 0xc3 | |
412 | #define CX86_CCR4 0xe8 | |
413 | #define CX86_CCR5 0xe9 | |
414 | #define CX86_CCR6 0xea | |
415 | #define CX86_CCR7 0xeb | |
416 | #define CX86_DIR0 0xfe | |
417 | #define CX86_DIR1 0xff | |
418 | #define CX86_ARR_BASE 0xc4 | |
419 | #define CX86_RCR_BASE 0xdc | |
420 | ||
421 | /* | |
422 | * NSC/Cyrix CPU indexed register access macros | |
423 | */ | |
424 | ||
425 | #define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); }) | |
426 | ||
427 | #define setCx86(reg, data) do { \ | |
428 | outb((reg), 0x22); \ | |
429 | outb((data), 0x23); \ | |
430 | } while (0) | |
431 | ||
432 | static inline void __monitor(const void *eax, unsigned long ecx, | |
433 | unsigned long edx) | |
434 | { | |
435 | /* "monitor %eax,%ecx,%edx;" */ | |
436 | asm volatile( | |
437 | ".byte 0x0f,0x01,0xc8;" | |
438 | : :"a" (eax), "c" (ecx), "d"(edx)); | |
439 | } | |
440 | ||
441 | static inline void __mwait(unsigned long eax, unsigned long ecx) | |
442 | { | |
443 | /* "mwait %eax,%ecx;" */ | |
444 | asm volatile( | |
445 | ".byte 0x0f,0x01,0xc9;" | |
446 | : :"a" (eax), "c" (ecx)); | |
447 | } | |
448 | ||
449 | #define stack_current() \ | |
450 | ({ \ | |
451 | struct thread_info *ti; \ | |
452 | asm("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ | |
453 | ti->task; \ | |
454 | }) | |
455 | ||
456 | #define cache_line_size() (boot_cpu_data.x86_cache_alignment) | |
457 | ||
458 | extern unsigned long boot_option_idle_override; | |
459 | /* Boot loader type from the setup header */ | |
460 | extern int bootloader_type; | |
461 | ||
462 | #endif /* __ASM_X86_64_PROCESSOR_H */ |