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gerrit-public.fairphone.software / kernel / msm-4.9 / 63d1142f8f69e39468bc6079ab2239e902828134 / . / arch / x86 / include / asm / irq_regs_32.h
blob: 86afd7473457e4cff97b120cfcde5516125a1366 [file] [log] [blame]
Jeremy Fitzhardinge70463da2006-12-07 02:14:03 +0100[diff] [blame]1/*
2 * Per-cpu current frame pointer - the location of the last exception frame on
Jeremy Fitzhardinge7c3576d2007-05-02 19:27:16 +0200[diff] [blame]3 * the stack, stored in the per-cpu area.
Jeremy Fitzhardinge70463da2006-12-07 02:14:03 +0100[diff] [blame]4 *
5 * Jeremy Fitzhardinge <jeremy@goop.org>
6 */
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700[diff] [blame]7#ifndef _ASM_X86_IRQ_REGS_32_H
8#define _ASM_X86_IRQ_REGS_32_H
Jeremy Fitzhardinge70463da2006-12-07 02:14:03 +0100[diff] [blame]9
Jeremy Fitzhardinge7c3576d2007-05-02 19:27:16 +0200[diff] [blame]10#include <asm/percpu.h>
11
Harvey Harrison19f47c62008-11-09 21:28:15 -0800[diff] [blame]12#define ARCH_HAS_OWN_IRQ_REGS
13
Jeremy Fitzhardinge7c3576d2007-05-02 19:27:16 +0200[diff] [blame]14DECLARE_PER_CPU(struct pt_regs *, irq_regs);
Jeremy Fitzhardinge70463da2006-12-07 02:14:03 +0100[diff] [blame]15
16static inline struct pt_regs *get_irq_regs(void)
17{
Jeremy Fitzhardinge7c3576d2007-05-02 19:27:16 +0200[diff] [blame]18 return x86_read_percpu(irq_regs);
Jeremy Fitzhardinge70463da2006-12-07 02:14:03 +0100[diff] [blame]19}
20
21static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
22{
23 struct pt_regs *old_regs;
24
Jeremy Fitzhardinge7c3576d2007-05-02 19:27:16 +0200[diff] [blame]25 old_regs = get_irq_regs();
26 x86_write_percpu(irq_regs, new_regs);
Jeremy Fitzhardinge70463da2006-12-07 02:14:03 +0100[diff] [blame]27
28 return old_regs;
29}
30
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700[diff] [blame]31#endif /* _ASM_X86_IRQ_REGS_32_H */