summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/trampoline.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/trampoline.c')
-rw-r--r--arch/x86/kernel/trampoline.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/kernel/trampoline.c b/arch/x86/kernel/trampoline.c
index 7c2102c2aadf..9a3d44c0df9a 100644
--- a/arch/x86/kernel/trampoline.c
+++ b/arch/x86/kernel/trampoline.c
@@ -2,6 +2,7 @@
#include <linux/memblock.h>
#include <asm/trampoline.h>
+#include <asm/pgtable.h>
#if defined(CONFIG_X86_64) && defined(CONFIG_ACPI_SLEEP)
#define __trampinit
@@ -37,3 +38,20 @@ unsigned long __trampinit setup_trampoline(void)
memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE);
return virt_to_phys(trampoline_base);
}
+
+void __init setup_trampoline_page_table(void)
+{
+#ifdef CONFIG_X86_32
+ /* Copy kernel address range */
+ clone_pgd_range(trampoline_pg_dir + KERNEL_PGD_BOUNDARY,
+ swapper_pg_dir + KERNEL_PGD_BOUNDARY,
+ min_t(unsigned long, KERNEL_PGD_PTRS,
+ KERNEL_PGD_BOUNDARY));
+
+ /* Initialize low mappings */
+ clone_pgd_range(trampoline_pg_dir,
+ swapper_pg_dir + KERNEL_PGD_BOUNDARY,
+ min_t(unsigned long, KERNEL_PGD_PTRS,
+ KERNEL_PGD_BOUNDARY));
+#endif
+}