processor.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:13k
- /*
- * include/asm-i386/processor.h
- *
- * Copyright (C) 1994 Linus Torvalds
- */
- #ifndef __ASM_I386_PROCESSOR_H
- #define __ASM_I386_PROCESSOR_H
- #include <asm/vm86.h>
- #include <asm/math_emu.h>
- #include <asm/segment.h>
- #include <asm/page.h>
- #include <asm/types.h>
- #include <asm/sigcontext.h>
- #include <asm/cpufeature.h>
- #include <linux/cache.h>
- #include <linux/config.h>
- #include <linux/threads.h>
- /*
- * Default implementation of macro that returns current
- * instruction pointer ("program counter").
- */
- #define current_text_addr() ({ void *pc; __asm__("movl $1f,%0n1:":"=g" (pc)); pc; })
- /*
- * CPU type and hardware bug flags. Kept separately for each CPU.
- * Members of this structure are referenced in head.S, so think twice
- * before touching them. [mj]
- */
- struct cpuinfo_x86 {
- __u8 x86; /* CPU family */
- __u8 x86_vendor; /* CPU vendor */
- __u8 x86_model;
- __u8 x86_mask;
- char wp_works_ok; /* It doesn't on 386's */
- char hlt_works_ok; /* Problems on some 486Dx4's and old 386's */
- char hard_math;
- char rfu;
- 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 - valid for CPUS which support this
- call */
- int fdiv_bug;
- int f00f_bug;
- int coma_bug;
- unsigned long loops_per_jiffy;
- unsigned long *pgd_quick;
- unsigned long *pmd_quick;
- unsigned long *pte_quick;
- unsigned long pgtable_cache_sz;
- } __attribute__((__aligned__(SMP_CACHE_BYTES)));
- #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_NSC 8
- #define X86_VENDOR_UNKNOWN 0xff
- /*
- * capabilities of CPUs
- */
- extern struct cpuinfo_x86 boot_cpu_data;
- extern struct tss_struct init_tss[NR_CPUS];
- #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
- #define cpu_has_pge (test_bit(X86_FEATURE_PGE, boot_cpu_data.x86_capability))
- #define cpu_has_pse (test_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability))
- #define cpu_has_pae (test_bit(X86_FEATURE_PAE, boot_cpu_data.x86_capability))
- #define cpu_has_tsc (test_bit(X86_FEATURE_TSC, boot_cpu_data.x86_capability))
- #define cpu_has_de (test_bit(X86_FEATURE_DE, boot_cpu_data.x86_capability))
- #define cpu_has_vme (test_bit(X86_FEATURE_VME, boot_cpu_data.x86_capability))
- #define cpu_has_fxsr (test_bit(X86_FEATURE_FXSR, boot_cpu_data.x86_capability))
- #define cpu_has_xmm (test_bit(X86_FEATURE_XMM, boot_cpu_data.x86_capability))
- #define cpu_has_fpu (test_bit(X86_FEATURE_FPU, boot_cpu_data.x86_capability))
- #define cpu_has_apic (test_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability))
- extern char ignore_irq13;
- extern void identify_cpu(struct cpuinfo_x86 *);
- extern void print_cpu_info(struct cpuinfo_x86 *);
- extern void dodgy_tsc(void);
- /*
- * 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 */
- /*
- * Generic CPUID function
- */
- static inline void cpuid(int op, int *eax, int *ebx, int *ecx, int *edx)
- {
- __asm__("cpuid"
- : "=a" (*eax),
- "=b" (*ebx),
- "=c" (*ecx),
- "=d" (*edx)
- : "0" (op));
- }
- /*
- * CPUID functions returning a single datum
- */
- static inline unsigned int cpuid_eax(unsigned int op)
- {
- unsigned int eax;
- __asm__("cpuid"
- : "=a" (eax)
- : "0" (op)
- : "bx", "cx", "dx");
- return eax;
- }
- static inline unsigned int cpuid_ebx(unsigned int op)
- {
- unsigned int eax, ebx;
- __asm__("cpuid"
- : "=a" (eax), "=b" (ebx)
- : "0" (op)
- : "cx", "dx" );
- return ebx;
- }
- static inline unsigned int cpuid_ecx(unsigned int op)
- {
- unsigned int eax, ecx;
- __asm__("cpuid"
- : "=a" (eax), "=c" (ecx)
- : "0" (op)
- : "bx", "dx" );
- return ecx;
- }
- static inline unsigned int cpuid_edx(unsigned int op)
- {
- unsigned int eax, edx;
- __asm__("cpuid"
- : "=a" (eax), "=d" (edx)
- : "0" (op)
- : "bx", "cx");
- return edx;
- }
- /*
- * 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 */
- #define load_cr3(pgdir)
- asm volatile("movl %0,%%cr3": :"r" (__pa(pgdir)));
- /*
- * 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__("movl %%cr4,%%eaxnt"
- "orl %0,%%eaxnt"
- "movl %%eax,%%cr4n"
- : : "irg" (mask)
- :"ax");
- }
- static inline void clear_in_cr4 (unsigned long mask)
- {
- mmu_cr4_features &= ~mask;
- __asm__("movl %%cr4,%%eaxnt"
- "andl %0,%%eaxnt"
- "movl %%eax,%%cr4n"
- : : "irg" (~mask)
- :"ax");
- }
- /*
- * 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
- /*
- * 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)
- /*
- * Bus types (default is ISA, but people can check others with these..)
- */
- #ifdef CONFIG_EISA
- extern int EISA_bus;
- #else
- #define EISA_bus (0)
- #endif
- extern int MCA_bus;
- /* from system description table in BIOS. Mostly for MCA use, but
- others may find it useful. */
- extern unsigned int machine_id;
- extern unsigned int machine_submodel_id;
- extern unsigned int BIOS_revision;
- extern unsigned int mca_pentium_flag;
- /*
- * User space process size: 3GB (default).
- */
- #define TASK_SIZE (PAGE_OFFSET)
- /* This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
- #define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
- /*
- * Size of io_bitmap in longwords: 32 is ports 0-0x3ff.
- */
- #define IO_BITMAP_SIZE 32
- #define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap)
- #define INVALID_IO_BITMAP_OFFSET 0x8000
- struct i387_fsave_struct {
- long cwd;
- long swd;
- long twd;
- long fip;
- long fcs;
- long foo;
- long fos;
- long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
- long status; /* software status information */
- };
- struct i387_fxsave_struct {
- unsigned short cwd;
- unsigned short swd;
- unsigned short twd;
- unsigned short fop;
- long fip;
- long fcs;
- long foo;
- long fos;
- long mxcsr;
- long reserved;
- long st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
- long xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
- long padding[56];
- } __attribute__ ((aligned (16)));
- struct i387_soft_struct {
- long cwd;
- long swd;
- long twd;
- long fip;
- long fcs;
- long foo;
- long fos;
- long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
- unsigned char ftop, changed, lookahead, no_update, rm, alimit;
- struct info *info;
- unsigned long entry_eip;
- };
- union i387_union {
- struct i387_fsave_struct fsave;
- struct i387_fxsave_struct fxsave;
- struct i387_soft_struct soft;
- };
- typedef struct {
- unsigned long seg;
- } mm_segment_t;
- struct tss_struct {
- unsigned short back_link,__blh;
- unsigned long esp0;
- unsigned short ss0,__ss0h;
- unsigned long esp1;
- unsigned short ss1,__ss1h;
- unsigned long esp2;
- unsigned short ss2,__ss2h;
- unsigned long __cr3;
- unsigned long eip;
- unsigned long eflags;
- unsigned long eax,ecx,edx,ebx;
- unsigned long esp;
- unsigned long ebp;
- unsigned long esi;
- unsigned long edi;
- unsigned short es, __esh;
- unsigned short cs, __csh;
- unsigned short ss, __ssh;
- unsigned short ds, __dsh;
- unsigned short fs, __fsh;
- unsigned short gs, __gsh;
- unsigned short ldt, __ldth;
- unsigned short trace, bitmap;
- unsigned long io_bitmap[IO_BITMAP_SIZE+1];
- /*
- * pads the TSS to be cacheline-aligned (size is 0x100)
- */
- unsigned long __cacheline_filler[5];
- };
- struct thread_struct {
- unsigned long esp0;
- unsigned long eip;
- unsigned long esp;
- unsigned long fs;
- unsigned long gs;
- /* Hardware debugging registers */
- unsigned long debugreg[8]; /* %%db0-7 debug registers */
- /* fault info */
- unsigned long cr2, trap_no, error_code;
- /* floating point info */
- union i387_union i387;
- /* virtual 86 mode info */
- struct vm86_struct * vm86_info;
- unsigned long screen_bitmap;
- unsigned long v86flags, v86mask, saved_esp0;
- /* IO permissions */
- int ioperm;
- unsigned long io_bitmap[IO_BITMAP_SIZE+1];
- };
- #define INIT_THREAD {
- 0,
- 0, 0, 0, 0,
- { [0 ... 7] = 0 }, /* debugging registers */
- 0, 0, 0,
- { { 0, }, }, /* 387 state */
- 0,0,0,0,0,
- 0,{~0,} /* io permissions */
- }
- #define INIT_TSS {
- 0,0, /* back_link, __blh */
- sizeof(init_stack) + (long) &init_stack, /* esp0 */
- __KERNEL_DS, 0, /* ss0 */
- 0,0,0,0,0,0, /* stack1, stack2 */
- 0, /* cr3 */
- 0,0, /* eip,eflags */
- 0,0,0,0, /* eax,ecx,edx,ebx */
- 0,0,0,0, /* esp,ebp,esi,edi */
- 0,0,0,0,0,0, /* es,cs,ss */
- 0,0,0,0,0,0, /* ds,fs,gs */
- __LDT(0),0, /* ldt */
- 0, INVALID_IO_BITMAP_OFFSET, /* tace, bitmap */
- {~0, } /* ioperm */
- }
- #define start_thread(regs, new_eip, new_esp) do {
- __asm__("movl %0,%%fs ; movl %0,%%gs": :"r" (0));
- set_fs(USER_DS);
- regs->xds = __USER_DS;
- regs->xes = __USER_DS;
- regs->xss = __USER_DS;
- regs->xcs = __USER_CS;
- regs->eip = new_eip;
- regs->esp = new_esp;
- } while (0)
- /* Forward declaration, a strange C thing */
- struct task_struct;
- struct mm_struct;
- /* Free all resources held by a thread. */
- extern void release_thread(struct task_struct *);
- /*
- * create a kernel thread without removing it from tasklists
- */
- extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
- /* Copy and release all segment info associated with a VM */
- extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
- extern void release_segments(struct mm_struct * mm);
- /*
- * Return saved PC of a blocked thread.
- */
- static inline unsigned long thread_saved_pc(struct thread_struct *t)
- {
- return ((unsigned long *)t->esp)[3];
- }
- unsigned long get_wchan(struct task_struct *p);
- #define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1019])
- #define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1022])
- #define THREAD_SIZE (2*PAGE_SIZE)
- #define alloc_task_struct() ((struct task_struct *) __get_free_pages(GFP_KERNEL,1))
- #define free_task_struct(p) free_pages((unsigned long) (p), 1)
- #define get_task_struct(tsk) atomic_inc(&virt_to_page(tsk)->count)
- #define init_task (init_task_union.task)
- #define init_stack (init_task_union.stack)
- struct microcode {
- unsigned int hdrver;
- unsigned int rev;
- unsigned int date;
- unsigned int sig;
- unsigned int cksum;
- unsigned int ldrver;
- unsigned int pf;
- unsigned int reserved[5];
- unsigned int bits[500];
- };
- /* '6' because it used to be for P6 only (but now covers Pentium 4 as well) */
- #define MICROCODE_IOCFREE _IO('6',0)
- /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
- static inline void rep_nop(void)
- {
- __asm__ __volatile__("rep;nop");
- }
- #define cpu_relax() rep_nop()
- /* Prefetch instructions for Pentium III and AMD Athlon */
- #ifdef CONFIG_MPENTIUMIII
- #define ARCH_HAS_PREFETCH
- extern inline void prefetch(const void *x)
- {
- __asm__ __volatile__ ("prefetchnta (%0)" : : "r"(x));
- }
- #elif CONFIG_X86_USE_3DNOW
- #define ARCH_HAS_PREFETCH
- #define ARCH_HAS_PREFETCHW
- #define ARCH_HAS_SPINLOCK_PREFETCH
- extern inline void prefetch(const void *x)
- {
- __asm__ __volatile__ ("prefetch (%0)" : : "r"(x));
- }
- extern inline void prefetchw(const void *x)
- {
- __asm__ __volatile__ ("prefetchw (%0)" : : "r"(x));
- }
- #define spin_lock_prefetch(x) prefetchw(x)
- #endif
- #endif /* __ASM_I386_PROCESSOR_H */