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Diffstat (limited to 'include/asm-x86_64/processor.h')
| -rw-r--r-- | include/asm-x86_64/processor.h | 462 |
1 files changed, 462 insertions, 0 deletions
diff --git a/include/asm-x86_64/processor.h b/include/asm-x86_64/processor.h new file mode 100644 index 00000000000..45ab74e8f14 --- /dev/null +++ b/include/asm-x86_64/processor.h @@ -0,0 +1,462 @@ +/* + * include/asm-x86_64/processor.h + * + * Copyright (C) 1994 Linus Torvalds + */ + +#ifndef __ASM_X86_64_PROCESSOR_H +#define __ASM_X86_64_PROCESSOR_H + +#include <asm/segment.h> +#include <asm/page.h> +#include <asm/types.h> +#include <asm/sigcontext.h> +#include <asm/cpufeature.h> +#include <linux/config.h> +#include <linux/threads.h> +#include <asm/msr.h> +#include <asm/current.h> +#include <asm/system.h> +#include <asm/mmsegment.h> +#include <asm/percpu.h> +#include <linux/personality.h> + +#define TF_MASK 0x00000100 +#define IF_MASK 0x00000200 +#define IOPL_MASK 0x00003000 +#define NT_MASK 0x00004000 +#define VM_MASK 0x00020000 +#define AC_MASK 0x00040000 +#define VIF_MASK 0x00080000 /* virtual interrupt flag */ +#define VIP_MASK 0x00100000 /* virtual interrupt pending */ +#define ID_MASK 0x00200000 + +#define desc_empty(desc) \ + (!((desc)->a + (desc)->b)) + +#define desc_equal(desc1, desc2) \ + (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b)) + +/* + * Default implementation of macro that returns current + * instruction pointer ("program counter"). + */ +#define current_text_addr() ({ void *pc; asm volatile("leaq 1f(%%rip),%0\n1:":"=r"(pc)); pc; }) + +/* + * CPU type and hardware bug flags. Kept separately for each CPU. + */ + +struct cpuinfo_x86 { + __u8 x86; /* CPU family */ + __u8 x86_vendor; /* CPU vendor */ + __u8 x86_model; + __u8 x86_mask; + int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */ + __u32 x86_capability[NCAPINTS]; + char x86_vendor_id[16]; + char x86_model_id[64]; + int x86_cache_size; /* in KB */ + int x86_clflush_size; + int x86_cache_alignment; + int x86_tlbsize; /* number of 4K pages in DTLB/ITLB combined(in pages)*/ + __u8 x86_virt_bits, x86_phys_bits; + __u8 x86_num_cores; + __u8 x86_apicid; + __u32 x86_power; + __u32 x86_cpuid_level; /* Max CPUID function supported */ + unsigned long loops_per_jiffy; +} ____cacheline_aligned; + +#define X86_VENDOR_INTEL 0 +#define X86_VENDOR_CYRIX 1 +#define X86_VENDOR_AMD 2 +#define X86_VENDOR_UMC 3 +#define X86_VENDOR_NEXGEN 4 +#define X86_VENDOR_CENTAUR 5 +#define X86_VENDOR_RISE 6 +#define X86_VENDOR_TRANSMETA 7 +#define X86_VENDOR_NUM 8 +#define X86_VENDOR_UNKNOWN 0xff + +#ifdef CONFIG_SMP +extern struct cpuinfo_x86 cpu_data[]; +#define current_cpu_data cpu_data[smp_processor_id()] +#else +#define cpu_data (&boot_cpu_data) +#define current_cpu_data boot_cpu_data +#endif + +extern char ignore_irq13; + +extern void identify_cpu(struct cpuinfo_x86 *); +extern void print_cpu_info(struct cpuinfo_x86 *); +extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); + +/* + * EFLAGS bits + */ +#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */ +#define X86_EFLAGS_PF 0x00000004 /* Parity Flag */ +#define X86_EFLAGS_AF 0x00000010 /* Auxillary carry Flag */ +#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */ +#define X86_EFLAGS_SF 0x00000080 /* Sign Flag */ +#define X86_EFLAGS_TF 0x00000100 /* Trap Flag */ +#define X86_EFLAGS_IF 0x00000200 /* Interrupt Flag */ +#define X86_EFLAGS_DF 0x00000400 /* Direction Flag */ +#define X86_EFLAGS_OF 0x00000800 /* Overflow Flag */ +#define X86_EFLAGS_IOPL 0x00003000 /* IOPL mask */ +#define X86_EFLAGS_NT 0x00004000 /* Nested Task */ +#define X86_EFLAGS_RF 0x00010000 /* Resume Flag */ +#define X86_EFLAGS_VM 0x00020000 /* Virtual Mode */ +#define X86_EFLAGS_AC 0x00040000 /* Alignment Check */ +#define X86_EFLAGS_VIF 0x00080000 /* Virtual Interrupt Flag */ +#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */ +#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */ + +/* + * Intel CPU features in CR4 + */ +#define X86_CR4_VME 0x0001 /* enable vm86 extensions */ +#define X86_CR4_PVI 0x0002 /* virtual interrupts flag enable */ +#define X86_CR4_TSD 0x0004 /* disable time stamp at ipl 3 */ +#define X86_CR4_DE 0x0008 /* enable debugging extensions */ +#define X86_CR4_PSE 0x0010 /* enable page size extensions */ +#define X86_CR4_PAE 0x0020 /* enable physical address extensions */ +#define X86_CR4_MCE 0x0040 /* Machine check enable */ +#define X86_CR4_PGE 0x0080 /* enable global pages */ +#define X86_CR4_PCE 0x0100 /* enable performance counters at ipl 3 */ +#define X86_CR4_OSFXSR 0x0200 /* enable fast FPU save and restore */ +#define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */ + +/* + * Save the cr4 feature set we're using (ie + * Pentium 4MB enable and PPro Global page + * enable), so that any CPU's that boot up + * after us can get the correct flags. + */ +extern unsigned long mmu_cr4_features; + +static inline void set_in_cr4 (unsigned long mask) +{ + mmu_cr4_features |= mask; + __asm__("movq %%cr4,%%rax\n\t" + "orq %0,%%rax\n\t" + "movq %%rax,%%cr4\n" + : : "irg" (mask) + :"ax"); +} + +static inline void clear_in_cr4 (unsigned long mask) +{ + mmu_cr4_features &= ~mask; + __asm__("movq %%cr4,%%rax\n\t" + "andq %0,%%rax\n\t" + "movq %%rax,%%cr4\n" + : : "irg" (~mask) + :"ax"); +} + + +/* + * User space process size. 47bits. + */ +#define TASK_SIZE (0x800000000000UL) + +/* This decides where the kernel will search for a free chunk of vm + * space during mmap's. + */ +#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000) +#define TASK_UNMAPPED_32 PAGE_ALIGN(IA32_PAGE_OFFSET/3) +#define TASK_UNMAPPED_64 PAGE_ALIGN(TASK_SIZE/3) +#define TASK_UNMAPPED_BASE \ + (test_thread_flag(TIF_IA32) ? TASK_UNMAPPED_32 : TASK_UNMAPPED_64) + +/* + * Size of io_bitmap. + */ +#define IO_BITMAP_BITS 65536 +#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) +#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) +#define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap) +#define INVALID_IO_BITMAP_OFFSET 0x8000 + +struct i387_fxsave_struct { + u16 cwd; + u16 swd; + u16 twd; + u16 fop; + u64 rip; + u64 rdp; + u32 mxcsr; + u32 mxcsr_mask; + u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ + u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 128 bytes */ + u32 padding[24]; +} __attribute__ ((aligned (16))); + +union i387_union { + struct i387_fxsave_struct fxsave; +}; + +struct tss_struct { + u32 reserved1; + u64 rsp0; + u64 rsp1; + u64 rsp2; + u64 reserved2; + u64 ist[7]; + u32 reserved3; + u32 reserved4; + u16 reserved5; + u16 io_bitmap_base; + /* + * The extra 1 is there because the CPU will access an + * additional byte beyond the end of the IO permission + * bitmap. The extra byte must be all 1 bits, and must + * be within the limit. Thus we have: + * + * 128 bytes, the bitmap itself, for ports 0..0x3ff + * 8 bytes, for an extra "long" of ~0UL + */ + unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; +} __attribute__((packed)) ____cacheline_aligned; + +extern struct cpuinfo_x86 boot_cpu_data; +DECLARE_PER_CPU(struct tss_struct,init_tss); + +#define ARCH_MIN_TASKALIGN 16 + +struct thread_struct { + unsigned long rsp0; + unsigned long rsp; + unsigned long userrsp; /* Copy from PDA */ + unsigned long fs; + unsigned long gs; + unsigned short es, ds, fsindex, gsindex; +/* Hardware debugging registers */ + unsigned long debugreg0; + unsigned long debugreg1; + unsigned long debugreg2; + unsigned long debugreg3; + unsigned long debugreg6; + unsigned long debugreg7; +/* fault info */ + unsigned long cr2, trap_no, error_code; +/* floating point info */ + union i387_union i387 __attribute__((aligned(16))); +/* IO permissions. the bitmap could be moved into the GDT, that would make + switch faster for a limited number of ioperm using tasks. -AK */ + int ioperm; + unsigned long *io_bitmap_ptr; + unsigned io_bitmap_max; +/* cached TLS descriptors. */ + u64 tls_array[GDT_ENTRY_TLS_ENTRIES]; +} __attribute__((aligned(16))); + +#define INIT_THREAD {} + +#define INIT_MMAP \ +{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL } + +#define STACKFAULT_STACK 1 +#define DOUBLEFAULT_STACK 2 +#define NMI_STACK 3 +#define DEBUG_STACK 4 +#define MCE_STACK 5 +#define N_EXCEPTION_STACKS 5 /* hw limit: 7 */ +#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) +#define EXCEPTION_STACK_ORDER 0 + +#define start_thread(regs,new_rip,new_rsp) do { \ + asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \ + load_gs_index(0); \ + (regs)->rip = (new_rip); \ + (regs)->rsp = (new_rsp); \ + write_pda(oldrsp, (new_rsp)); \ + (regs)->cs = __USER_CS; \ + (regs)->ss = __USER_DS; \ + (regs)->eflags = 0x200; \ + set_fs(USER_DS); \ +} while(0) + +struct task_struct; +struct mm_struct; + +/* Free all resources held by a thread. */ +extern void release_thread(struct task_struct *); + +/* Prepare to copy thread state - unlazy all lazy status */ +extern void prepare_to_copy(struct task_struct *tsk); + +/* + * create a kernel thread without removing it from tasklists + */ +extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); + +/* + * Return saved PC of a blocked thread. + * What is this good for? it will be always the scheduler or ret_from_fork. + */ +#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.rsp - 8)) + +extern unsigned long get_wchan(struct task_struct *p); +#define KSTK_EIP(tsk) \ + (((struct pt_regs *)(tsk->thread.rsp0 - sizeof(struct pt_regs)))->rip) +#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */ + + +struct microcode_header { + unsigned int hdrver; + unsigned int rev; + unsigned int date; + unsigned int sig; + unsigned int cksum; + unsigned int ldrver; + unsigned int pf; + unsigned int datasize; + unsigned int totalsize; + unsigned int reserved[3]; +}; + +struct microcode { + struct microcode_header hdr; + unsigned int bits[0]; +}; + +typedef struct microcode microcode_t; +typedef struct microcode_header microcode_header_t; + +/* microcode format is extended from prescott processors */ +struct extended_signature { + unsigned int sig; + unsigned int pf; + unsigned int cksum; +}; + +struct extended_sigtable { + unsigned int count; + unsigned int cksum; + unsigned int reserved[3]; + struct extended_signature sigs[0]; +}; + +/* '6' because it used to be for P6 only (but now covers Pentium 4 as well) */ +#define MICROCODE_IOCFREE _IO('6',0) + + +#define ASM_NOP1 K8_NOP1 +#define ASM_NOP2 K8_NOP2 +#define ASM_NOP3 K8_NOP3 +#define ASM_NOP4 K8_NOP4 +#define ASM_NOP5 K8_NOP5 +#define ASM_NOP6 K8_NOP6 +#define ASM_NOP7 K8_NOP7 +#define ASM_NOP8 K8_NOP8 + +/* Opteron nops */ +#define K8_NOP1 ".byte 0x90\n" +#define K8_NOP2 ".byte 0x66,0x90\n" +#define K8_NOP3 ".byte 0x66,0x66,0x90\n" +#define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n" +#define K8_NOP5 K8_NOP3 K8_NOP2 +#define K8_NOP6 K8_NOP3 K8_NOP3 +#define K8_NOP7 K8_NOP4 K8_NOP3 +#define K8_NOP8 K8_NOP4 K8_NOP4 + +#define ASM_NOP_MAX 8 + +/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ +extern inline void rep_nop(void) +{ + __asm__ __volatile__("rep;nop": : :"memory"); +} + +/* Stop speculative execution */ +extern inline void sync_core(void) +{ + int tmp; + asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory"); +} + +#define cpu_has_fpu 1 + +#define ARCH_HAS_PREFETCH +static inline void prefetch(void *x) +{ + asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x)); +} + +#define ARCH_HAS_PREFETCHW 1 +static inline void prefetchw(void *x) +{ + alternative_input(ASM_NOP5, + "prefetchw (%1)", + X86_FEATURE_3DNOW, + "r" (x)); +} + +#define ARCH_HAS_SPINLOCK_PREFETCH 1 + +#define spin_lock_prefetch(x) prefetchw(x) + +#define cpu_relax() rep_nop() + +/* + * NSC/Cyrix CPU configuration register indexes + */ +#define CX86_CCR0 0xc0 +#define CX86_CCR1 0xc1 +#define CX86_CCR2 0xc2 +#define CX86_CCR3 0xc3 +#define CX86_CCR4 0xe8 +#define CX86_CCR5 0xe9 +#define CX86_CCR6 0xea +#define CX86_CCR7 0xeb +#define CX86_DIR0 0xfe +#define CX86_DIR1 0xff +#define CX86_ARR_BASE 0xc4 +#define CX86_RCR_BASE 0xdc + +/* + * NSC/Cyrix CPU indexed register access macros + */ + +#define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); }) + +#define setCx86(reg, data) do { \ + outb((reg), 0x22); \ + outb((data), 0x23); \ +} while (0) + +static inline void __monitor(const void *eax, unsigned long ecx, + unsigned long edx) +{ + /* "monitor %eax,%ecx,%edx;" */ + asm volatile( + ".byte 0x0f,0x01,0xc8;" + : :"a" (eax), "c" (ecx), "d"(edx)); +} + +static inline void __mwait(unsigned long eax, unsigned long ecx) +{ + /* "mwait %eax,%ecx;" */ + asm volatile( + ".byte 0x0f,0x01,0xc9;" + : :"a" (eax), "c" (ecx)); +} + +#define stack_current() \ +({ \ + struct thread_info *ti; \ + asm("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ + ti->task; \ +}) + +#define cache_line_size() (boot_cpu_data.x86_cache_alignment) + +extern unsigned long boot_option_idle_override; +/* Boot loader type from the setup header */ +extern int bootloader_type; + +#endif /* __ASM_X86_64_PROCESSOR_H */ |