| Jeremy Fitzhardinge | 70463da | 2006-12-07 02:14:03 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Per-cpu current frame pointer - the location of the last exception frame on |
| Jeremy Fitzhardinge | 7c3576d | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 3 | * the stack, stored in the per-cpu area. |
| Jeremy Fitzhardinge | 70463da | 2006-12-07 02:14:03 +0100 | [diff] [blame] | 4 | * |
| 5 | * Jeremy Fitzhardinge <jeremy@goop.org> |
| 6 | */ |
| 7 | #ifndef _ASM_I386_IRQ_REGS_H |
| 8 | #define _ASM_I386_IRQ_REGS_H |
| 9 | |
| Jeremy Fitzhardinge | 7c3576d | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 10 | #include <asm/percpu.h> |
| 11 | |
| 12 | DECLARE_PER_CPU(struct pt_regs *, irq_regs); |
| Jeremy Fitzhardinge | 70463da | 2006-12-07 02:14:03 +0100 | [diff] [blame] | 13 | |
| 14 | static inline struct pt_regs *get_irq_regs(void) |
| 15 | { |
| Jeremy Fitzhardinge | 7c3576d | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 16 | return x86_read_percpu(irq_regs); |
| Jeremy Fitzhardinge | 70463da | 2006-12-07 02:14:03 +0100 | [diff] [blame] | 17 | } |
| 18 | |
| 19 | static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs) |
| 20 | { |
| 21 | struct pt_regs *old_regs; |
| 22 | |
| Jeremy Fitzhardinge | 7c3576d | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 23 | old_regs = get_irq_regs(); |
| 24 | x86_write_percpu(irq_regs, new_regs); |
| Jeremy Fitzhardinge | 70463da | 2006-12-07 02:14:03 +0100 | [diff] [blame] | 25 | |
| 26 | return old_regs; |
| 27 | } |
| 28 | |
| 29 | #endif /* _ASM_I386_IRQ_REGS_H */ |