diff options
| -rw-r--r-- | i386/i386at/acpi.c | 3 | ||||
| -rw-r--r-- | i386/i386at/model_dep.c | 4 | ||||
| -rw-r--r-- | i386/intel/pmap.c | 1 |
3 files changed, 8 insertions, 0 deletions
diff --git a/i386/i386at/acpi.c b/i386/i386at/acpi.c index ec8aeb1..986b3a2 100644 --- a/i386/i386at/acpi.c +++ b/i386/i386at/acpi.c @@ -55,8 +55,11 @@ grub_machine_acpi_get_rsdpv2 (void) grub_uint8_t *ebda, *ptr; grub_dprintf ("acpi", "Looking for RSDP. Scanning EBDA\n"); + printf("ptr is %p\n", (* ((grub_uint16_t *) phystokv (0x40e))) << 4); + printf("len is %u\n", *( (grub_uint16_t *) phystokv ((* ((grub_uint16_t *) phystokv (0x40e))) << 4))); ebda = (grub_uint8_t *) phystokv ((* ((grub_uint16_t *) phystokv (0x40e))) << 4); ebda_len = * (grub_uint16_t *) ebda; + printf("EBDA len %d\n", ebda_len); if (! ebda_len) return 0; for (ptr = ebda; ptr < ebda + 0x400; ptr += 16) diff --git a/i386/i386at/model_dep.c b/i386/i386at/model_dep.c index 6093a66..209cfb1 100644 --- a/i386/i386at/model_dep.c +++ b/i386/i386at/model_dep.c @@ -180,10 +180,14 @@ void machine_init(void) *(unsigned short *)phystokv(0x472) = 0x1234; #endif /* MACH_HYP */ +#if VM_MIN_KERNEL_ADDRESS == 0 /* * Unmap page 0 to trap NULL references. + * + * Note that this breaks accessing some BIOS areas stored there. */ pmap_unmap_page_zero(); +#endif } /* Conserve power on processor CPU. */ diff --git a/i386/intel/pmap.c b/i386/intel/pmap.c index 8a23a44..62b33cf 100644 --- a/i386/intel/pmap.c +++ b/i386/intel/pmap.c @@ -2835,6 +2835,7 @@ pmap_unmap_page_zero (void) { int *pte; + printf("Unmapping the zero page. Some BIOS functions may not be working any more.\n"); pte = (int *) pmap_pte (kernel_pmap, 0); if (!pte) return; |