sh: Tidy up the sh bios VBR handling.
This moves the VBR handling out of the main trap handling code and in to
the sh-bios helper code. A couple of accessors are added in order to
permit other kernel code to get at the VBR value for state save/restore
paths.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 86639be..efcbdfe 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -31,6 +31,7 @@
#include <asm/uaccess.h>
#include <asm/fpu.h>
#include <asm/kprobes.h>
+#include <asm/sh_bios.h>
#ifdef CONFIG_CPU_SH2
# define TRAP_RESERVED_INST 4
@@ -876,35 +877,10 @@
die_if_kernel("exception", regs, ex);
}
-#if defined(CONFIG_SH_STANDARD_BIOS)
-void *gdb_vbr_vector;
-
-static inline void __init gdb_vbr_init(void)
-{
- register unsigned long vbr;
-
- /*
- * Read the old value of the VBR register to initialise
- * the vector through which debug and BIOS traps are
- * delegated by the Linux trap handler.
- */
- asm volatile("stc vbr, %0" : "=r" (vbr));
-
- gdb_vbr_vector = (void *)(vbr + 0x100);
- printk("Setting GDB trap vector to 0x%08lx\n",
- (unsigned long)gdb_vbr_vector);
-}
-#endif
-
void __cpuinit per_cpu_trap_init(void)
{
extern void *vbr_base;
-#ifdef CONFIG_SH_STANDARD_BIOS
- if (raw_smp_processor_id() == 0)
- gdb_vbr_init();
-#endif
-
/* NOTE: The VBR value should be at P1
(or P2, virtural "fixed" address space).
It's definitely should not in physical address. */
@@ -959,6 +935,9 @@
set_exception_table_vec(TRAP_UBC, break_point_trap);
#endif
+ /* Save off the BIOS VBR, if there is one */
+ sh_bios_vbr_init();
+
/* Setup VBR for boot cpu */
per_cpu_trap_init();
}