a6b4655258
This patch unifies the load_segment() macro, making them equal in both x86_64 and i386 architectures. The common version goes to system.h, and the old are deleted. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
96 lines
2 KiB
C
96 lines
2 KiB
C
#ifndef _ASM_X86_SYSTEM_H_
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#define _ASM_X86_SYSTEM_H_
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#include <asm/asm.h>
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#ifdef CONFIG_X86_32
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# include "system_32.h"
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#else
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# include "system_64.h"
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#endif
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#ifdef __KERNEL__
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#define _set_base(addr, base) do { unsigned long __pr; \
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__asm__ __volatile__ ("movw %%dx,%1\n\t" \
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"rorl $16,%%edx\n\t" \
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"movb %%dl,%2\n\t" \
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"movb %%dh,%3" \
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:"=&d" (__pr) \
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:"m" (*((addr)+2)), \
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"m" (*((addr)+4)), \
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"m" (*((addr)+7)), \
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"0" (base) \
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); } while (0)
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#define _set_limit(addr, limit) do { unsigned long __lr; \
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__asm__ __volatile__ ("movw %%dx,%1\n\t" \
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"rorl $16,%%edx\n\t" \
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"movb %2,%%dh\n\t" \
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"andb $0xf0,%%dh\n\t" \
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"orb %%dh,%%dl\n\t" \
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"movb %%dl,%2" \
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:"=&d" (__lr) \
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:"m" (*(addr)), \
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"m" (*((addr)+6)), \
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"0" (limit) \
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); } while (0)
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#define set_base(ldt, base) _set_base(((char *)&(ldt)) , (base))
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#define set_limit(ldt, limit) _set_limit(((char *)&(ldt)) , ((limit)-1))
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/*
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* Load a segment. Fall back on loading the zero
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* segment if something goes wrong..
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*/
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#define loadsegment(seg, value) \
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asm volatile("\n" \
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"1:\t" \
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"movl %k0,%%" #seg "\n" \
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"2:\n" \
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".section .fixup,\"ax\"\n" \
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"3:\t" \
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"movl %k1, %%" #seg "\n\t" \
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"jmp 2b\n" \
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".previous\n" \
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".section __ex_table,\"a\"\n\t" \
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_ASM_ALIGN "\n\t" \
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_ASM_PTR " 1b,3b\n" \
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".previous" \
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: :"r" (value), "r" (0))
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/*
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* Save a segment register away
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*/
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#define savesegment(seg, value) \
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asm volatile("mov %%" #seg ",%0":"=rm" (value))
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static inline unsigned long get_limit(unsigned long segment)
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{
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unsigned long __limit;
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__asm__("lsll %1,%0"
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:"=r" (__limit):"r" (segment));
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return __limit+1;
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}
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#endif /* __KERNEL__ */
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static inline void clflush(void *__p)
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{
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asm volatile("clflush %0" : "+m" (*(char __force *)__p));
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}
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#define nop() __asm__ __volatile__ ("nop")
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void disable_hlt(void);
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void enable_hlt(void);
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extern int es7000_plat;
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void cpu_idle_wait(void);
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extern unsigned long arch_align_stack(unsigned long sp);
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extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
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void default_idle(void);
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#endif
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