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Diffstat (limited to 'arch/powerpc/platforms/83xx/misc.c')
-rw-r--r--arch/powerpc/platforms/83xx/misc.c29
1 files changed, 21 insertions, 8 deletions
diff --git a/arch/powerpc/platforms/83xx/misc.c b/arch/powerpc/platforms/83xx/misc.c
index f0c6df61faa9..f01806c940e1 100644
--- a/arch/powerpc/platforms/83xx/misc.c
+++ b/arch/powerpc/platforms/83xx/misc.c
@@ -18,23 +18,36 @@
#include "mpc83xx.h"
+static __be32 __iomem *restart_reg_base;
+
+static int __init mpc83xx_restart_init(void)
+{
+ /* map reset restart_reg_baseister space */
+ restart_reg_base = ioremap(get_immrbase() + 0x900, 0xff);
+
+ return 0;
+}
+
+arch_initcall(mpc83xx_restart_init);
+
void mpc83xx_restart(char *cmd)
{
#define RST_OFFSET 0x00000900
#define RST_PROT_REG 0x00000018
#define RST_CTRL_REG 0x0000001c
- __be32 __iomem *reg;
-
- /* map reset register space */
- reg = ioremap(get_immrbase() + 0x900, 0xff);
local_irq_disable();
- /* enable software reset "RSTE" */
- out_be32(reg + (RST_PROT_REG >> 2), 0x52535445);
+ if (restart_reg_base) {
+ /* enable software reset "RSTE" */
+ out_be32(restart_reg_base + (RST_PROT_REG >> 2), 0x52535445);
+
+ /* set software hard reset */
+ out_be32(restart_reg_base + (RST_CTRL_REG >> 2), 0x2);
+ } else {
+ printk (KERN_EMERG "Error: Restart registers not mapped, spinning!\n");
+ }
- /* set software hard reset */
- out_be32(reg + (RST_CTRL_REG >> 2), 0x2);
for (;;) ;
}