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-rw-r--r--arch/i386/boot/boot.h24
-rw-r--r--arch/i386/boot/cpucheck.c3
-rw-r--r--arch/i386/boot/edd.c60
-rw-r--r--arch/i386/boot/tty.c14
-rw-r--r--arch/i386/boot/video-vga.c17
-rw-r--r--arch/i386/boot/video.c2
6 files changed, 46 insertions, 74 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 658834d9f92..bd138e442ec 100644
--- a/arch/i386/boot/edd.c
+++ b/arch/i386/boot/edd.c
@@ -19,57 +19,28 @@
#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
-struct edd_dapa {
- u8 pkt_size;
- u8 rsvd;
- u16 sector_cnt;
- u16 buf_off, buf_seg;
- u64 lba;
- u64 buf_lin_addr;
-};
-
/*
* Read the MBR (first sector) from a specific device.
*/
static int read_mbr(u8 devno, void *buf)
{
- struct edd_dapa dapa;
- u16 ax, bx, cx, dx, si;
-
- memset(&dapa, 0, sizeof dapa);
- dapa.pkt_size = sizeof(dapa);
- dapa.sector_cnt = 1;
- dapa.buf_off = (size_t)buf;
- dapa.buf_seg = ds();
- /* dapa.lba = 0; */
-
- ax = 0x4200; /* Extended Read */
- si = (size_t)&dapa;
- dx = devno;
- asm("pushfl; stc; int $0x13; setc %%al; popfl"
- : "+a" (ax), "+S" (si), "+d" (dx)
- : "m" (dapa)
- : "ebx", "ecx", "edi", "memory");
-
- if (!(u8)ax)
- return 0; /* OK */
+ u16 ax, bx, cx, dx;
ax = 0x0201; /* Legacy Read, one sector */
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 */
}
-static u32 read_mbr_sig(u8 devno, struct edd_info *ei)
+static u32 read_mbr_sig(u8 devno, struct edd_info *ei, u32 *mbrsig)
{
int sector_size;
char *mbrbuf_ptr, *mbrbuf_end;
- u32 mbrsig;
u32 buf_base, mbr_base;
extern char _end[];
@@ -85,15 +56,15 @@ static u32 read_mbr_sig(u8 devno, struct edd_info *ei)
/* Make sure we actually have space on the heap... */
if (!(boot_params.hdr.loadflags & CAN_USE_HEAP))
- return 0;
+ return -1;
if (mbrbuf_end > (char *)(size_t)boot_params.hdr.heap_end_ptr)
- return 0;
+ return -1;
if (read_mbr(devno, mbrbuf_ptr))
- return 0;
+ return -1;
- mbrsig = *(u32 *)&mbrbuf_ptr[EDD_MBR_SIG_OFFSET];
- return mbrsig;
+ *mbrsig = *(u32 *)&mbrbuf_ptr[EDD_MBR_SIG_OFFSET];
+ return 0;
}
static int get_edd_info(u8 devno, struct edd_info *ei)
@@ -160,6 +131,7 @@ void query_edd(void)
int do_edd = 1;
int devno;
struct edd_info ei, *edp;
+ u32 *mbrptr;
if (cmdline_find_option("edd", eddarg, sizeof eddarg) > 0) {
if (!strcmp(eddarg, "skipmbr") || !strcmp(eddarg, "skip"))
@@ -168,7 +140,8 @@ void query_edd(void)
do_edd = 0;
}
- edp = (struct edd_info *)boot_params.eddbuf;
+ edp = boot_params.eddbuf;
+ mbrptr = boot_params.edd_mbr_sig_buffer;
if (!do_edd)
return;
@@ -186,11 +159,8 @@ void query_edd(void)
boot_params.eddbuf_entries++;
}
- if (do_mbr) {
- u32 mbr_sig;
- mbr_sig = read_mbr_sig(devno, &ei);
- boot_params.edd_mbr_sig_buffer[devno-0x80] = mbr_sig;
- }
+ if (do_mbr && !read_mbr_sig(devno, &ei, mbrptr++))
+ boot_params.edd_mbr_sig_buf_entries = devno-0x80+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;
}
diff --git a/arch/i386/boot/video.c b/arch/i386/boot/video.c
index 958130ef004..693f20d3102 100644
--- a/arch/i386/boot/video.c
+++ b/arch/i386/boot/video.c
@@ -61,7 +61,7 @@ static void store_video_mode(void)
/* Not all BIOSes are clean with respect to the top bit */
boot_params.screen_info.orig_video_mode = ax & 0x7f;
- boot_params.screen_info.orig_video_page = page;
+ boot_params.screen_info.orig_video_page = page >> 8;
}
/*
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 14:03:30 +0000