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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-24 16:10:56 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-24 16:10:56 -0700
commit37a3cc99d5048df62bb201c0b45a51ba94497e45 (patch)
treec129d5d04fc4eab5c8bc39fbf2203121be4d6d52 /arch/i386
parent6e106b0d97e79f1abb60cc49a53af760950c3384 (diff)
parent71351b98b9be6a867aa00276d67716c0728cfff7 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup: [x86 setup] Make sure AH=00h when setting a video mode [x86 setup] Volatilize asm() statements
Diffstat (limited to 'arch/i386')
-rw-r--r--arch/i386/boot/boot.h24
-rw-r--r--arch/i386/boot/cpucheck.c3
-rw-r--r--arch/i386/boot/edd.c6
-rw-r--r--arch/i386/boot/tty.c14
-rw-r--r--arch/i386/boot/video-vga.c17
5 files changed, 33 insertions, 31 deletions
diff --git a/arch/i386/boot/boot.h b/arch/i386/boot/boot.h
index dec70c9b605..20bab9431ac 100644
--- a/arch/i386/boot/boot.h
+++ b/arch/i386/boot/boot.h
@@ -87,7 +87,7 @@ static inline void set_fs(u16 seg)
static inline u16 fs(void)
{
u16 seg;
- asm("movw %%fs,%0" : "=rm" (seg));
+ asm volatile("movw %%fs,%0" : "=rm" (seg));
return seg;
}
@@ -98,7 +98,7 @@ static inline void set_gs(u16 seg)
static inline u16 gs(void)
{
u16 seg;
- asm("movw %%gs,%0" : "=rm" (seg));
+ asm volatile("movw %%gs,%0" : "=rm" (seg));
return seg;
}
@@ -107,19 +107,19 @@ typedef unsigned int addr_t;
static inline u8 rdfs8(addr_t addr)
{
u8 v;
- asm("movb %%fs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
+ asm volatile("movb %%fs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
return v;
}
static inline u16 rdfs16(addr_t addr)
{
u16 v;
- asm("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
+ asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
return v;
}
static inline u32 rdfs32(addr_t addr)
{
u32 v;
- asm("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
+ asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
return v;
}
@@ -139,19 +139,19 @@ static inline void wrfs32(u32 v, addr_t addr)
static inline u8 rdgs8(addr_t addr)
{
u8 v;
- asm("movb %%gs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
+ asm volatile("movb %%gs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
return v;
}
static inline u16 rdgs16(addr_t addr)
{
u16 v;
- asm("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
+ asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
return v;
}
static inline u32 rdgs32(addr_t addr)
{
u32 v;
- asm("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
+ asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
return v;
}
@@ -180,15 +180,15 @@ static inline int memcmp(const void *s1, const void *s2, size_t len)
static inline int memcmp_fs(const void *s1, addr_t s2, size_t len)
{
u8 diff;
- asm("fs; repe; cmpsb; setnz %0"
- : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
+ asm volatile("fs; repe; cmpsb; setnz %0"
+ : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
return diff;
}
static inline int memcmp_gs(const void *s1, addr_t s2, size_t len)
{
u8 diff;
- asm("gs; repe; cmpsb; setnz %0"
- : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
+ asm volatile("gs; repe; cmpsb; setnz %0"
+ : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
return diff;
}
diff --git a/arch/i386/boot/cpucheck.c b/arch/i386/boot/cpucheck.c
index 991e8ceae1d..e655a89c551 100644
--- a/arch/i386/boot/cpucheck.c
+++ b/arch/i386/boot/cpucheck.c
@@ -96,7 +96,8 @@ static int has_fpu(void)
asm volatile("movl %0,%%cr0" : : "r" (cr0));
}
- asm("fninit ; fnstsw %0 ; fnstcw %1" : "+m" (fsw), "+m" (fcw));
+ asm volatile("fninit ; fnstsw %0 ; fnstcw %1"
+ : "+m" (fsw), "+m" (fcw));
return fsw == 0 && (fcw & 0x103f) == 0x003f;
}
diff --git a/arch/i386/boot/edd.c b/arch/i386/boot/edd.c
index 82b5c846a19..bd138e442ec 100644
--- a/arch/i386/boot/edd.c
+++ b/arch/i386/boot/edd.c
@@ -30,9 +30,9 @@ static int read_mbr(u8 devno, void *buf)
cx = 0x0001; /* Sector 0-0-1 */
dx = devno;
bx = (size_t)buf;
- asm("pushfl; stc; int $0x13; setc %%al; popfl"
- : "+a" (ax), "+c" (cx), "+d" (dx), "+b" (bx)
- : : "esi", "edi", "memory");
+ asm volatile("pushfl; stc; int $0x13; setc %%al; popfl"
+ : "+a" (ax), "+c" (cx), "+d" (dx), "+b" (bx)
+ : : "esi", "edi", "memory");
return -(u8)ax; /* 0 or -1 */
}
diff --git a/arch/i386/boot/tty.c b/arch/i386/boot/tty.c
index 9c668aad351..f3f14bd2637 100644
--- a/arch/i386/boot/tty.c
+++ b/arch/i386/boot/tty.c
@@ -54,9 +54,9 @@ static u8 gettime(void)
u16 ax = 0x0200;
u16 cx, dx;
- asm("int $0x1a"
- : "+a" (ax), "=c" (cx), "=d" (dx)
- : : "ebx", "esi", "edi");
+ asm volatile("int $0x1a"
+ : "+a" (ax), "=c" (cx), "=d" (dx)
+ : : "ebx", "esi", "edi");
return dx >> 8;
}
@@ -67,7 +67,7 @@ static u8 gettime(void)
int getchar(void)
{
u16 ax = 0;
- asm("int $0x16" : "+a" (ax));
+ asm volatile("int $0x16" : "+a" (ax));
return ax & 0xff;
}
@@ -75,9 +75,9 @@ int getchar(void)
static int kbd_pending(void)
{
u8 pending;
- asm("int $0x16; setnz %0"
- : "=rm" (pending)
- : "a" (0x0100));
+ asm volatile("int $0x16; setnz %0"
+ : "=rm" (pending)
+ : "a" (0x0100));
return pending;
}
diff --git a/arch/i386/boot/video-vga.c b/arch/i386/boot/video-vga.c
index 700d09a9c9b..aef02f9ec0c 100644
--- a/arch/i386/boot/video-vga.c
+++ b/arch/i386/boot/video-vga.c
@@ -47,16 +47,16 @@ static u8 vga_set_basic_mode(void)
#ifdef CONFIG_VIDEO_400_HACK
if (adapter >= ADAPTER_VGA) {
- asm(INT10
- : : "a" (0x1202), "b" (0x0030)
- : "ecx", "edx", "esi", "edi");
+ asm volatile(INT10
+ : : "a" (0x1202), "b" (0x0030)
+ : "ecx", "edx", "esi", "edi");
}
#endif
ax = 0x0f00;
- asm(INT10
- : "+a" (ax)
- : : "ebx", "ecx", "edx", "esi", "edi");
+ asm volatile(INT10
+ : "+a" (ax)
+ : : "ebx", "ecx", "edx", "esi", "edi");
mode = (u8)ax;
@@ -73,9 +73,10 @@ static u8 vga_set_basic_mode(void)
mode = 3;
/* Set the mode */
+ ax = mode;
asm volatile(INT10
- : : "a" (mode)
- : "ebx", "ecx", "edx", "esi", "edi");
+ : "+a" (ax)
+ : : "ebx", "ecx", "edx", "esi", "edi");
do_restore = 1;
return mode;
}