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-rw-r--r--i386/i386at/model_dep.c14
-rw-r--r--i386/intel/pmap.c6
2 files changed, 20 insertions, 0 deletions
diff --git a/i386/i386at/model_dep.c b/i386/i386at/model_dep.c
index bbdf9dc..3761093 100644
--- a/i386/i386at/model_dep.c
+++ b/i386/i386at/model_dep.c
@@ -394,6 +394,13 @@ i386at_init(void)
kernel_page_dir[lin2pdenum(INIT_VM_MIN_KERNEL_ADDRESS) + i] =
kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS) + i];
#endif
+ /* We need BIOS memory mapped at 0xc0000 & co for Linux drivers */
+#ifdef LINUX_DEV
+#if VM_MIN_KERNEL_ADDRESS != 0
+ kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS)] =
+ kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS)];
+#endif
+#endif
#ifdef MACH_XEN
for (i = 0; i < PDPNUM; i++)
@@ -458,6 +465,13 @@ i386at_init(void)
#endif /* MACH_XEN */
}
#endif
+ /* Keep BIOS memory mapped */
+#ifdef LINUX_DEV
+#if VM_MIN_KERNEL_ADDRESS != 0
+ kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS)] =
+ kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS)];
+#endif
+#endif
/* Not used after boot, better give it back. */
#ifdef MACH_XEN
diff --git a/i386/intel/pmap.c b/i386/intel/pmap.c
index d8865b2..f0623de 100644
--- a/i386/intel/pmap.c
+++ b/i386/intel/pmap.c
@@ -1128,6 +1128,12 @@ pmap_t pmap_create(size)
panic("pmap_create");
memcpy(p->dirbase, kernel_page_dir, PDPNUM * INTEL_PGBYTES);
+#ifdef LINUX_DEV
+#if VM_MIN_KERNEL_ADDRESS != 0
+ /* Do not map BIOS in user tasks */
+ p->dirbase[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS)] = 0;
+#endif
+#endif
#ifdef MACH_XEN
{
int i;