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Set carry flag before calling INT 15,e801 and INT 15,e820.

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Ignore carry flag for INT 15,88; the Ralf Brown interrupt list says
that CF is unreliable for this call.
This commit is contained in:
Michael Brown
2006-05-24 12:19:16 +00:00
parent 7a53d07027
commit 53935e9dc6
1 changed files with 4 additions and 4 deletions
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8
src/arch/i386/firmware/pcbios/memmap.c
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@@ -76,6 +76,7 @@ static unsigned int extmemsize_e801 ( void ) {
unsigned int extmem; unsigned int extmem;
REAL_EXEC ( rm_mem_e801, REAL_EXEC ( rm_mem_e801,
"stc\n\t"
"int $0x15\n\t" "int $0x15\n\t"
"pushfw\n\t" "pushfw\n\t"
"popw %w0\n\t", "popw %w0\n\t",
@@ -111,10 +112,8 @@ static unsigned int extmemsize_88 ( void ) {
uint16_t extmem; uint16_t extmem;
REAL_EXEC ( rm_mem_88, REAL_EXEC ( rm_mem_88,
"int $0x15\n\t" /* Ignore CF; it is not reliable for this call */
"jnc 1f\n\t" "int $0x15\n\t",
"xorw %%ax, %%ax\n\t"
"\n1:\n\t",
1, 1,
OUT_CONSTRAINTS ( "=a" ( extmem ) ), OUT_CONSTRAINTS ( "=a" ( extmem ) ),
IN_CONSTRAINTS ( "a" ( 0x8800 ) ), IN_CONSTRAINTS ( "a" ( 0x8800 ) ),
@@ -155,6 +154,7 @@ static int meme820 ( struct memory_region *memmap, unsigned int entries ) {
do { do {
REAL_EXEC ( rm_mem_e820, REAL_EXEC ( rm_mem_e820,
"stc\n\t"
"int $0x15\n\t" "int $0x15\n\t"
"pushfw\n\t" "pushfw\n\t"
"popw %w0\n\t", "popw %w0\n\t",