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-rw-r--r--i386/i386at/acpi.c3
-rw-r--r--i386/i386at/model_dep.c4
2 files changed, 7 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. */