2 * include/asm-x86_64/processor.h
4 * Copyright (C) 1994 Linus Torvalds
7 #ifndef __ASM_X86_64_PROCESSOR_H
8 #define __ASM_X86_64_PROCESSOR_H
10 #include <asm/segment.h>
12 #include <asm/types.h>
13 #include <asm/sigcontext.h>
14 #include <asm/cpufeature.h>
15 #include <linux/threads.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>
22 #include <linux/cpumask.h>
23 #include <asm/processor-flags.h>
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
35 #define desc_empty(desc) \
36 (!((desc)->a | (desc)->b))
38 #define desc_equal(desc1, desc2) \
39 (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
42 * Default implementation of macro that returns current
43 * instruction pointer ("program counter").
45 #define current_text_addr() ({ void *pc; asm volatile("leaq 1f(%%rip),%0\n1:":"=r"(pc)); pc; })
48 * CPU type and hardware bug flags. Kept separately for each CPU.
52 __u8 x86; /* CPU family */
53 __u8 x86_vendor; /* CPU vendor */
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 */
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;
65 __u8 x86_max_cores; /* cpuid returned max cores value */
67 __u32 extended_cpuid_level; /* Max extended CPUID function supported */
68 unsigned long loops_per_jiffy;
70 cpumask_t llc_shared_map; /* cpus sharing the last level cache */
74 __u8 booted_cores; /* number of cores as seen by OS */
75 __u8 phys_proc_id; /* Physical Processor id. */
76 __u8 cpu_core_id; /* Core id. */
78 } ____cacheline_aligned;
80 #define X86_VENDOR_INTEL 0
81 #define X86_VENDOR_CYRIX 1
82 #define X86_VENDOR_AMD 2
83 #define X86_VENDOR_UMC 3
84 #define X86_VENDOR_NEXGEN 4
85 #define X86_VENDOR_CENTAUR 5
86 #define X86_VENDOR_RISE 6
87 #define X86_VENDOR_TRANSMETA 7
88 #define X86_VENDOR_NUM 8
89 #define X86_VENDOR_UNKNOWN 0xff
92 extern struct cpuinfo_x86 cpu_data[];
93 #define current_cpu_data cpu_data[smp_processor_id()]
95 #define cpu_data (&boot_cpu_data)
96 #define current_cpu_data boot_cpu_data
99 extern char ignore_irq13;
101 extern void identify_cpu(struct cpuinfo_x86 *);
102 extern void print_cpu_info(struct cpuinfo_x86 *);
103 extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
104 extern unsigned short num_cache_leaves;
107 * Intel CPU features in CR4
109 #define X86_CR4_VME 0x0001 /* enable vm86 extensions */
110 #define X86_CR4_PVI 0x0002 /* virtual interrupts flag enable */
111 #define X86_CR4_TSD 0x0004 /* disable time stamp at ipl 3 */
112 #define X86_CR4_DE 0x0008 /* enable debugging extensions */
113 #define X86_CR4_PSE 0x0010 /* enable page size extensions */
114 #define X86_CR4_PAE 0x0020 /* enable physical address extensions */
115 #define X86_CR4_MCE 0x0040 /* Machine check enable */
116 #define X86_CR4_PGE 0x0080 /* enable global pages */
117 #define X86_CR4_PCE 0x0100 /* enable performance counters at ipl 3 */
118 #define X86_CR4_OSFXSR 0x0200 /* enable fast FPU save and restore */
119 #define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */
122 * Save the cr4 feature set we're using (ie
123 * Pentium 4MB enable and PPro Global page
124 * enable), so that any CPU's that boot up
125 * after us can get the correct flags.
127 extern unsigned long mmu_cr4_features;
129 static inline void set_in_cr4 (unsigned long mask)
131 mmu_cr4_features |= mask;
132 __asm__("movq %%cr4,%%rax\n\t"
139 static inline void clear_in_cr4 (unsigned long mask)
141 mmu_cr4_features &= ~mask;
142 __asm__("movq %%cr4,%%rax\n\t"
151 * User space process size. 47bits minus one guard page.
153 #define TASK_SIZE64 (0x800000000000UL - 4096)
155 /* This decides where the kernel will search for a free chunk of vm
156 * space during mmap's.
158 #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000)
160 #define TASK_SIZE (test_thread_flag(TIF_IA32) ? IA32_PAGE_OFFSET : TASK_SIZE64)
161 #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64)
163 #define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE/3)
168 #define IO_BITMAP_BITS 65536
169 #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
170 #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
171 #define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap)
172 #define INVALID_IO_BITMAP_OFFSET 0x8000
174 struct i387_fxsave_struct {
183 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
184 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 128 bytes */
186 } __attribute__ ((aligned (16)));
189 struct i387_fxsave_struct fxsave;
204 * The extra 1 is there because the CPU will access an
205 * additional byte beyond the end of the IO permission
206 * bitmap. The extra byte must be all 1 bits, and must
207 * be within the limit. Thus we have:
209 * 128 bytes, the bitmap itself, for ports 0..0x3ff
210 * 8 bytes, for an extra "long" of ~0UL
212 unsigned long io_bitmap[IO_BITMAP_LONGS + 1];
213 } __attribute__((packed)) ____cacheline_aligned;
216 extern struct cpuinfo_x86 boot_cpu_data;
217 DECLARE_PER_CPU(struct tss_struct,init_tss);
218 /* Save the original ist values for checking stack pointers during debugging */
220 unsigned long ist[7];
222 DECLARE_PER_CPU(struct orig_ist, orig_ist);
224 #ifdef CONFIG_X86_VSMP
225 #define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT)
226 #define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT)
228 #define ARCH_MIN_TASKALIGN 16
229 #define ARCH_MIN_MMSTRUCT_ALIGN 0
232 struct thread_struct {
235 unsigned long userrsp; /* Copy from PDA */
238 unsigned short es, ds, fsindex, gsindex;
239 /* Hardware debugging registers */
240 unsigned long debugreg0;
241 unsigned long debugreg1;
242 unsigned long debugreg2;
243 unsigned long debugreg3;
244 unsigned long debugreg6;
245 unsigned long debugreg7;
247 unsigned long cr2, trap_no, error_code;
248 /* floating point info */
249 union i387_union i387 __attribute__((aligned(16)));
250 /* IO permissions. the bitmap could be moved into the GDT, that would make
251 switch faster for a limited number of ioperm using tasks. -AK */
253 unsigned long *io_bitmap_ptr;
254 unsigned io_bitmap_max;
255 /* cached TLS descriptors. */
256 u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
257 } __attribute__((aligned(16)));
259 #define INIT_THREAD { \
260 .rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
264 .rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
268 { &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
270 #define start_thread(regs,new_rip,new_rsp) do { \
271 asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \
273 (regs)->rip = (new_rip); \
274 (regs)->rsp = (new_rsp); \
275 write_pda(oldrsp, (new_rsp)); \
276 (regs)->cs = __USER_CS; \
277 (regs)->ss = __USER_DS; \
278 (regs)->eflags = 0x200; \
282 #define get_debugreg(var, register) \
283 __asm__("movq %%db" #register ", %0" \
285 #define set_debugreg(value, register) \
286 __asm__("movq %0,%%db" #register \
293 /* Free all resources held by a thread. */
294 extern void release_thread(struct task_struct *);
296 /* Prepare to copy thread state - unlazy all lazy status */
297 extern void prepare_to_copy(struct task_struct *tsk);
300 * create a kernel thread without removing it from tasklists
302 extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
305 * Return saved PC of a blocked thread.
306 * What is this good for? it will be always the scheduler or ret_from_fork.
308 #define thread_saved_pc(t) (*(unsigned long *)((t)->thread.rsp - 8))
310 extern unsigned long get_wchan(struct task_struct *p);
311 #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.rsp0 - 1)
312 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->rip)
313 #define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
316 struct microcode_header {
324 unsigned int datasize;
325 unsigned int totalsize;
326 unsigned int reserved[3];
330 struct microcode_header hdr;
331 unsigned int bits[0];
334 typedef struct microcode microcode_t;
335 typedef struct microcode_header microcode_header_t;
337 /* microcode format is extended from prescott processors */
338 struct extended_signature {
344 struct extended_sigtable {
347 unsigned int reserved[3];
348 struct extended_signature sigs[0];
352 #define ASM_NOP1 K8_NOP1
353 #define ASM_NOP2 K8_NOP2
354 #define ASM_NOP3 K8_NOP3
355 #define ASM_NOP4 K8_NOP4
356 #define ASM_NOP5 K8_NOP5
357 #define ASM_NOP6 K8_NOP6
358 #define ASM_NOP7 K8_NOP7
359 #define ASM_NOP8 K8_NOP8
362 #define K8_NOP1 ".byte 0x90\n"
363 #define K8_NOP2 ".byte 0x66,0x90\n"
364 #define K8_NOP3 ".byte 0x66,0x66,0x90\n"
365 #define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n"
366 #define K8_NOP5 K8_NOP3 K8_NOP2
367 #define K8_NOP6 K8_NOP3 K8_NOP3
368 #define K8_NOP7 K8_NOP4 K8_NOP3
369 #define K8_NOP8 K8_NOP4 K8_NOP4
371 #define ASM_NOP_MAX 8
373 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
374 static inline void rep_nop(void)
376 __asm__ __volatile__("rep;nop": : :"memory");
379 /* Stop speculative execution */
380 static inline void sync_core(void)
383 asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory");
386 #define cpu_has_fpu 1
388 #define ARCH_HAS_PREFETCH
389 static inline void prefetch(void *x)
391 asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
394 #define ARCH_HAS_PREFETCHW 1
395 static inline void prefetchw(void *x)
397 alternative_input("prefetcht0 (%1)",
403 #define ARCH_HAS_SPINLOCK_PREFETCH 1
405 #define spin_lock_prefetch(x) prefetchw(x)
407 #define cpu_relax() rep_nop()
410 * NSC/Cyrix CPU configuration register indexes
412 #define CX86_CCR0 0xc0
413 #define CX86_CCR1 0xc1
414 #define CX86_CCR2 0xc2
415 #define CX86_CCR3 0xc3
416 #define CX86_CCR4 0xe8
417 #define CX86_CCR5 0xe9
418 #define CX86_CCR6 0xea
419 #define CX86_CCR7 0xeb
420 #define CX86_DIR0 0xfe
421 #define CX86_DIR1 0xff
422 #define CX86_ARR_BASE 0xc4
423 #define CX86_RCR_BASE 0xdc
426 * NSC/Cyrix CPU indexed register access macros
429 #define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); })
431 #define setCx86(reg, data) do { \
433 outb((data), 0x23); \
436 static inline void serialize_cpu(void)
438 __asm__ __volatile__ ("cpuid" : : : "ax", "bx", "cx", "dx");
441 static inline void __monitor(const void *eax, unsigned long ecx,
444 /* "monitor %eax,%ecx,%edx;" */
446 ".byte 0x0f,0x01,0xc8;"
447 : :"a" (eax), "c" (ecx), "d"(edx));
450 static inline void __mwait(unsigned long eax, unsigned long ecx)
452 /* "mwait %eax,%ecx;" */
454 ".byte 0x0f,0x01,0xc9;"
455 : :"a" (eax), "c" (ecx));
458 static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
460 /* "mwait %eax,%ecx;" */
462 "sti; .byte 0x0f,0x01,0xc9;"
463 : :"a" (eax), "c" (ecx));
466 extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
468 #define stack_current() \
470 struct thread_info *ti; \
471 asm("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
475 #define cache_line_size() (boot_cpu_data.x86_cache_alignment)
477 extern unsigned long boot_option_idle_override;
478 /* Boot loader type from the setup header */
479 extern int bootloader_type;
481 #define HAVE_ARCH_PICK_MMAP_LAYOUT 1
483 #endif /* __ASM_X86_64_PROCESSOR_H */