diff options
| -rw-r--r-- | src/arch/i386/firmware/pcbios/e820mangler.S | 28 |
1 files changed, 9 insertions, 19 deletions
diff --git a/src/arch/i386/firmware/pcbios/e820mangler.S b/src/arch/i386/firmware/pcbios/e820mangler.S index 3c4cf21b..ad773f74 100644 --- a/src/arch/i386/firmware/pcbios/e820mangler.S +++ b/src/arch/i386/firmware/pcbios/e820mangler.S @@ -245,10 +245,19 @@ get_underlying_e820: pushl %ebx pushl %ecx pushl %edx + pushw %es + pushw %di + pushw %ds + popw %es + movw $underlying_e820_cache, %di + movl $20, %ecx movl underlying_e820_ebx, %ebx stc pushfw lcall *%cs:int15_vector + popw %di + popw %es + /* Check for error return from underlying e820 call */ jc 1f /* CF set: error */ cmpl $SMAP, %eax je 2f /* 'SMAP' missing: error */ @@ -262,25 +271,6 @@ get_underlying_e820: popl %ecx popl %ebx popl %eax - /* Copy result to cache */ - pushw %es - pushw %fs - pushw %si - pushw %di - pushw %cx - pushw %es - popw %fs - movw %di, %si - pushw %ds - popw %es - movw $underlying_e820_cache, %di - movw $20, %cx - fs rep movsb - popw %cx - popw %di - popw %si - popw %fs - popw %es /* Mark cache as containing this result */ incw underlying_e820_index |