diff options
| -rw-r--r-- | linux/vbelib.c | 8 | ||||
| -rw-r--r-- | linux/vbelib.h | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/linux/vbelib.c b/linux/vbelib.c index b6379b111d..12ea0b989d 100644 --- a/linux/vbelib.c +++ b/linux/vbelib.c @@ -56,14 +56,22 @@ static inline int VBE_LRMI_int(int int_no, struct LRMI_regs *r) int vbeInit( void ) { + unsigned short iopl_port,int_10_seg; + size_t i; if(!LRMI_init()) return VBE_VM86_FAIL; /* Allow read/write to ALL io ports */ + int_10_seg = *(unsigned short *)PhysToVirtSO(0x0000,0x0042); + /* Video BIOS should be at C000:0000 and above */ + if((int_10_seg >> 12) < 0xC) return VBE_BROKEN_BIOS; ioperm(0, 1024, 1); iopl(3); memset(&vbe_pm_info,0,sizeof(struct VesaProtModeInterface)); vbeGetProtModeInfo(&vbe_pm_info); + i = 0; + while((iopl_port=vbe_pm_info.iopl_ports[i++]) != 0xFFFF) ioperm(iopl_port,1,1); + iopl(3); return VBE_OK; } diff --git a/linux/vbelib.h b/linux/vbelib.h index c3504aa3c9..3ff95c971d 100644 --- a/linux/vbelib.h +++ b/linux/vbelib.h @@ -189,6 +189,7 @@ struct VesaProtModeInterface #define VBE_VM86_FAIL -1 #define VBE_OUT_OF_DOS_MEM -2 #define VBE_OUT_OF_MEM -3 +#define VBE_BROKEN_BIOS -4 #define VBE_VESA_ERROR_MASK 0x004f #define VBE_VESA_ERRCODE_MASK 0xff00 |