sh: Setup boot CPU VBR early to enable early page faults.

vmemmap and the vmsplit code amongst others need to be able to take page
faults much earlier than trap_init() time, so move this in to the early
CPU initialization. VBR setup for secondary CPUs is already handled
through start_secondary(), so we only need to do this for the boot CPU.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 17 insertions, 4 deletions

diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c
index 6311b0b1789..c736422344e 100644
--- a/arch/sh/kernel/cpu/init.c
+++ b/arch/sh/kernel/cpu/init.c
@@ -24,6 +24,7 @@
 #include <asm/elf.h>
 #include <asm/io.h>
 #include <asm/smp.h>
+#include <asm/sh_bios.h>
 
 #ifdef CONFIG_SH_FPU
 #define cpu_has_fpu     1
@@ -342,9 +343,21 @@ asmlinkage void __init sh_cpu_init(void)
         speculative_execution_init();
         expmask_init();
 
-        /*
-         * Boot processor to setup the FP and extended state context info.
-         */
-        if (raw_smp_processor_id() == 0)
+        /* Do the rest of the boot processor setup */
+        if (raw_smp_processor_id() == 0) {
+                /* Save off the BIOS VBR, if there is one */
+                sh_bios_vbr_init();
+
+                /*
+                 * Setup VBR for boot CPU. Secondary CPUs do this through
+                 * start_secondary().
+                 */
+                per_cpu_trap_init();
+
+                /*
+                 * Boot processor to setup the FP and extended state
+                 * context info.
+                 */
                 init_thread_xstate();
+        }
 }