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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2012-03-24 02:59:16 +0100
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2012-03-24 02:59:16 +0100
commit0ef8bca36fdf3c57c90c948a4894c4baf5e0c3fd (patch)
tree08f74a99ef3034474814252eecc1191d3bc9a952 /i386/intel/pmap.c
parent2ec0334d36910ff59727f1c6b3efc6648209020a (diff)
Make sure BIOS area is mapped in kernel threads
* i386/i386at/model_dep.c (i386at_init): Map BIOS memory at 0. * i386/intel/pmap.c (pmap_create): Do not map BIOS memory in user tasks.
Diffstat (limited to 'i386/intel/pmap.c')
-rw-r--r--i386/intel/pmap.c6
1 files changed, 6 insertions, 0 deletions
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;