From e31c243f984628d02f045dc4b622f1e2827860dc Mon Sep 17 00:00:00 2001 From: David Howells Date: Thu, 10 Apr 2008 16:10:55 +0100 Subject: FRV: Add support for emulation of userspace atomic ops [try #2] Use traps 120-126 to emulate atomic cmpxchg32, xchg32, and XOR-, OR-, AND-, SUB- and ADD-to-memory operations for userspace. Signed-off-by: David Howells Signed-off-by: Linus Torvalds --- include/asm-frv/spr-regs.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/asm-frv') diff --git a/include/asm-frv/spr-regs.h b/include/asm-frv/spr-regs.h index c2a541ef828..01e6af5e99b 100644 --- a/include/asm-frv/spr-regs.h +++ b/include/asm-frv/spr-regs.h @@ -99,9 +99,23 @@ #define TBR_TT_TRAP1 (0x81 << 4) #define TBR_TT_TRAP2 (0x82 << 4) #define TBR_TT_TRAP3 (0x83 << 4) +#define TBR_TT_TRAP120 (0xf8 << 4) +#define TBR_TT_TRAP121 (0xf9 << 4) +#define TBR_TT_TRAP122 (0xfa << 4) +#define TBR_TT_TRAP123 (0xfb << 4) +#define TBR_TT_TRAP124 (0xfc << 4) +#define TBR_TT_TRAP125 (0xfd << 4) #define TBR_TT_TRAP126 (0xfe << 4) #define TBR_TT_BREAK (0xff << 4) +#define TBR_TT_ATOMIC_CMPXCHG32 TBR_TT_TRAP120 +#define TBR_TT_ATOMIC_XCHG32 TBR_TT_TRAP121 +#define TBR_TT_ATOMIC_XOR TBR_TT_TRAP122 +#define TBR_TT_ATOMIC_OR TBR_TT_TRAP123 +#define TBR_TT_ATOMIC_AND TBR_TT_TRAP124 +#define TBR_TT_ATOMIC_SUB TBR_TT_TRAP125 +#define TBR_TT_ATOMIC_ADD TBR_TT_TRAP126 + #define __get_TBR() ({ unsigned long x; asm volatile("movsg tbr,%0" : "=r"(x)); x; }) /* -- cgit v1.2.3-70-g09d2