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Diffstat (limited to 'i386/i386at/gpl/linux/include/asm/system.h')
-rw-r--r--i386/i386at/gpl/linux/include/asm/system.h301
1 files changed, 0 insertions, 301 deletions
diff --git a/i386/i386at/gpl/linux/include/asm/system.h b/i386/i386at/gpl/linux/include/asm/system.h
deleted file mode 100644
index 9c6f862a..00000000
--- a/i386/i386at/gpl/linux/include/asm/system.h
+++ /dev/null
@@ -1,301 +0,0 @@
-#ifndef __ASM_SYSTEM_H
-#define __ASM_SYSTEM_H
-
-#include <asm/segment.h>
-
-/*
- * Entry into gdt where to find first TSS. GDT layout:
- * 0 - nul
- * 1 - kernel code segment
- * 2 - kernel data segment
- * 3 - user code segment
- * 4 - user data segment
- * ...
- * 8 - TSS #0
- * 9 - LDT #0
- * 10 - TSS #1
- * 11 - LDT #1
- */
-#define FIRST_TSS_ENTRY 8
-#define FIRST_LDT_ENTRY (FIRST_TSS_ENTRY+1)
-#define _TSS(n) ((((unsigned long) n)<<4)+(FIRST_TSS_ENTRY<<3))
-#define _LDT(n) ((((unsigned long) n)<<4)+(FIRST_LDT_ENTRY<<3))
-#define load_TR(n) __asm__("ltr %%ax": /* no output */ :"a" (_TSS(n)))
-#define load_ldt(n) __asm__("lldt %%ax": /* no output */ :"a" (_LDT(n)))
-#define store_TR(n) \
-__asm__("str %%ax\n\t" \
- "subl %2,%%eax\n\t" \
- "shrl $4,%%eax" \
- :"=a" (n) \
- :"0" (0),"i" (FIRST_TSS_ENTRY<<3))
-
-/* This special macro can be used to load a debugging register */
-
-#define loaddebug(register) \
- __asm__("movl %0,%%edx\n\t" \
- "movl %%edx,%%db" #register "\n\t" \
- : /* no output */ \
- :"m" (current->debugreg[register]) \
- :"dx");
-
-
-/*
- * switch_to(n) should switch tasks to task nr n, first
- * checking that n isn't the current task, in which case it does nothing.
- * This also clears the TS-flag if the task we switched to has used
- * the math co-processor latest.
- *
- * It also reloads the debug regs if necessary..
- */
-
-
-#ifdef __SMP__
- /*
- * Keep the lock depth straight. If we switch on an interrupt from
- * kernel->user task we need to lose a depth, and if we switch the
- * other way we need to gain a depth. Same layer switches come out
- * the same.
- *
- * We spot a switch in user mode because the kernel counter is the
- * same as the interrupt counter depth. (We never switch during the
- * message/invalidate IPI).
- *
- * We fsave/fwait so that an exception goes off at the right time
- * (as a call from the fsave or fwait in effect) rather than to
- * the wrong process.
- */
-
-#define switch_to(tsk) do { \
- cli();\
- if(current->flags&PF_USEDFPU) \
- { \
- __asm__ __volatile__("fnsave %0":"=m" (current->tss.i387.hard)); \
- __asm__ __volatile__("fwait"); \
- current->flags&=~PF_USEDFPU; \
- } \
- current->lock_depth=syscall_count; \
- kernel_counter+=next->lock_depth-current->lock_depth; \
- syscall_count=next->lock_depth; \
-__asm__("pushl %%edx\n\t" \
- "movl "SYMBOL_NAME_STR(apic_reg)",%%edx\n\t" \
- "movl 0x20(%%edx), %%edx\n\t" \
- "shrl $22,%%edx\n\t" \
- "and $0x3C,%%edx\n\t" \
- "xchgl %%ecx,"SYMBOL_NAME_STR(current_set)"(,%%edx)\n\t" \
- "popl %%edx\n\t" \
- "ljmp %0\n\t" \
- "sti\n\t" \
- : /* no output */ \
- :"m" (*(((char *)&tsk->tss.tr)-4)), \
- "c" (tsk) \
- :"cx"); \
- /* Now maybe reload the debug registers */ \
- if(current->debugreg[7]){ \
- loaddebug(0); \
- loaddebug(1); \
- loaddebug(2); \
- loaddebug(3); \
- loaddebug(6); \
- } \
-} while (0)
-
-#else
-#define switch_to(tsk) do { \
-__asm__("cli\n\t" \
- "xchgl %%ecx,"SYMBOL_NAME_STR(current_set)"\n\t" \
- "ljmp %0\n\t" \
- "sti\n\t" \
- "cmpl %%ecx,"SYMBOL_NAME_STR(last_task_used_math)"\n\t" \
- "jne 1f\n\t" \
- "clts\n" \
- "1:" \
- : /* no output */ \
- :"m" (*(((char *)&tsk->tss.tr)-4)), \
- "c" (tsk) \
- :"cx"); \
- /* Now maybe reload the debug registers */ \
- if(current->debugreg[7]){ \
- loaddebug(0); \
- loaddebug(1); \
- loaddebug(2); \
- loaddebug(3); \
- loaddebug(6); \
- } \
-} while (0)
-#endif
-
-#define _set_base(addr,base) \
-__asm__("movw %%dx,%0\n\t" \
- "rorl $16,%%edx\n\t" \
- "movb %%dl,%1\n\t" \
- "movb %%dh,%2" \
- : /* no output */ \
- :"m" (*((addr)+2)), \
- "m" (*((addr)+4)), \
- "m" (*((addr)+7)), \
- "d" (base) \
- :"dx")
-
-#define _set_limit(addr,limit) \
-__asm__("movw %%dx,%0\n\t" \
- "rorl $16,%%edx\n\t" \
- "movb %1,%%dh\n\t" \
- "andb $0xf0,%%dh\n\t" \
- "orb %%dh,%%dl\n\t" \
- "movb %%dl,%1" \
- : /* no output */ \
- :"m" (*(addr)), \
- "m" (*((addr)+6)), \
- "d" (limit) \
- :"dx")
-
-#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , base )
-#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , (limit-1)>>12 )
-
-static inline unsigned long _get_base(char * addr)
-{
- unsigned long __base;
- __asm__("movb %3,%%dh\n\t"
- "movb %2,%%dl\n\t"
- "shll $16,%%edx\n\t"
- "movw %1,%%dx"
- :"=&d" (__base)
- :"m" (*((addr)+2)),
- "m" (*((addr)+4)),
- "m" (*((addr)+7)));
- return __base;
-}
-
-#define get_base(ldt) _get_base( ((char *)&(ldt)) )
-
-static inline unsigned long get_limit(unsigned long segment)
-{
- unsigned long __limit;
- __asm__("lsll %1,%0"
- :"=r" (__limit):"r" (segment));
- return __limit+1;
-}
-
-#define nop() __asm__ __volatile__ ("nop")
-
-/*
- * Clear and set 'TS' bit respectively
- */
-#define clts() __asm__ __volatile__ ("clts")
-#define stts() \
-__asm__ __volatile__ ( \
- "movl %%cr0,%%eax\n\t" \
- "orl $8,%%eax\n\t" \
- "movl %%eax,%%cr0" \
- : /* no outputs */ \
- : /* no inputs */ \
- :"ax")
-
-
-#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
-#define tas(ptr) (xchg((ptr),1))
-
-struct __xchg_dummy { unsigned long a[100]; };
-#define __xg(x) ((volatile struct __xchg_dummy *)(x))
-
-static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
-{
- switch (size) {
- case 1:
- __asm__("xchgb %b0,%1"
- :"=q" (x), "=m" (*__xg(ptr))
- :"0" (x), "m" (*__xg(ptr)));
- break;
- case 2:
- __asm__("xchgw %w0,%1"
- :"=r" (x), "=m" (*__xg(ptr))
- :"0" (x), "m" (*__xg(ptr)));
- break;
- case 4:
- __asm__("xchgl %0,%1"
- :"=r" (x), "=m" (*__xg(ptr))
- :"0" (x), "m" (*__xg(ptr)));
- break;
- }
- return x;
-}
-
-#define mb() __asm__ __volatile__ ("" : : :"memory")
-#define sti() __asm__ __volatile__ ("sti": : :"memory")
-#define cli() __asm__ __volatile__ ("cli": : :"memory")
-
-#define save_flags(x) \
-__asm__ __volatile__("pushfl ; popl %0":"=r" (x): /* no input */ :"memory")
-
-#define restore_flags(x) \
-__asm__ __volatile__("pushl %0 ; popfl": /* no output */ :"r" (x):"memory")
-
-#define iret() __asm__ __volatile__ ("iret": : :"memory")
-
-#define _set_gate(gate_addr,type,dpl,addr) \
-__asm__ __volatile__ ("movw %%dx,%%ax\n\t" \
- "movw %2,%%dx\n\t" \
- "movl %%eax,%0\n\t" \
- "movl %%edx,%1" \
- :"=m" (*((long *) (gate_addr))), \
- "=m" (*(1+(long *) (gate_addr))) \
- :"i" ((short) (0x8000+(dpl<<13)+(type<<8))), \
- "d" ((char *) (addr)),"a" (KERNEL_CS << 16) \
- :"ax","dx")
-
-#define set_intr_gate(n,addr) \
- _set_gate(&idt[n],14,0,addr)
-
-#define set_trap_gate(n,addr) \
- _set_gate(&idt[n],15,0,addr)
-
-#define set_system_gate(n,addr) \
- _set_gate(&idt[n],15,3,addr)
-
-#define set_call_gate(a,addr) \
- _set_gate(a,12,3,addr)
-
-#define _set_seg_desc(gate_addr,type,dpl,base,limit) {\
- *((gate_addr)+1) = ((base) & 0xff000000) | \
- (((base) & 0x00ff0000)>>16) | \
- ((limit) & 0xf0000) | \
- ((dpl)<<13) | \
- (0x00408000) | \
- ((type)<<8); \
- *(gate_addr) = (((base) & 0x0000ffff)<<16) | \
- ((limit) & 0x0ffff); }
-
-#define _set_tssldt_desc(n,addr,limit,type) \
-__asm__ __volatile__ ("movw $" #limit ",%1\n\t" \
- "movw %%ax,%2\n\t" \
- "rorl $16,%%eax\n\t" \
- "movb %%al,%3\n\t" \
- "movb $" type ",%4\n\t" \
- "movb $0x00,%5\n\t" \
- "movb %%ah,%6\n\t" \
- "rorl $16,%%eax" \
- : /* no output */ \
- :"a" (addr+0xc0000000), "m" (*(n)), "m" (*(n+2)), "m" (*(n+4)), \
- "m" (*(n+5)), "m" (*(n+6)), "m" (*(n+7)) \
- )
-
-#define set_tss_desc(n,addr) _set_tssldt_desc(((char *) (n)),((int)(addr)),235,"0x89")
-#define set_ldt_desc(n,addr,size) \
- _set_tssldt_desc(((char *) (n)),((int)(addr)),((size << 3) - 1),"0x82")
-
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt;
-
-/*
- * disable hlt during certain critical i/o operations
- */
-#ifndef MACH
-#define HAVE_DISABLE_HLT
-#endif
-void disable_hlt(void);
-void enable_hlt(void);
-
-#endif
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