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commit c396d065d3f5e5a0f966857d710a434a2f2db066
parent 4003e9bed8a306048c7dfe7143949778f96f7273
Author: rsc <rsc>
Date:   Sun,  8 Mar 2009 21:27:57 +0000

xv6/x86.h: add stosb, fix bugs in insl/outsl (rep not repne)

Diffstat:
Mx86.h | 13+++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/x86.h b/x86.h @@ -12,7 +12,7 @@ inb(ushort port) static inline void insl(int port, void *addr, int cnt) { - asm volatile("cld; repne insl" : + asm volatile("cld; rep insl" : "=D" (addr), "=c" (cnt) : "d" (port), "0" (addr), "1" (cnt) : "memory", "cc"); @@ -33,12 +33,21 @@ outw(ushort port, ushort data) static inline void outsl(int port, const void *addr, int cnt) { - asm volatile("cld; repne outsl" : + asm volatile("cld; rep outsl" : "=S" (addr), "=c" (cnt) : "d" (port), "0" (addr), "1" (cnt) : "cc"); } +static inline void +stosb(void *addr, int data, int cnt) +{ + asm volatile("cld; rep stosb" : + "=D" (addr), "=c" (cnt) : + "0" (addr), "1" (cnt), "a" (data) : + "memory", "cc"); +} + static inline uint read_ebp(void) {