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| author | Jeff Garzik <jgarzik@pretzel.yyz.us> | 2005-06-23 05:50:57 +0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-06-23 05:50:57 +0400 |
| commit | a5324343955997d1439f26518ddac567cd5d134b (patch) | |
| tree | f43558389c41e3a0f076c4ee55d77c4aa1561779 /arch/ppc/syslib/ppc83xx_setup.c | |
| parent | 8199d3a79c224bbe5943fa08684e1f93a17881b0 (diff) | |
| parent | a4936044001694f033fe4ea94d6034d51a6b465c (diff) | |
| download | linux-a5324343955997d1439f26518ddac567cd5d134b.tar.xz | |
Merge /spare/repo/linux-2.6/
Diffstat (limited to 'arch/ppc/syslib/ppc83xx_setup.c')
| -rw-r--r-- | arch/ppc/syslib/ppc83xx_setup.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/arch/ppc/syslib/ppc83xx_setup.c b/arch/ppc/syslib/ppc83xx_setup.c index c28f9d679484..602a86891f7f 100644 --- a/arch/ppc/syslib/ppc83xx_setup.c +++ b/arch/ppc/syslib/ppc83xx_setup.c @@ -23,12 +23,12 @@ #include <linux/serial_core.h> #include <linux/serial_8250.h> -#include <asm/prom.h> #include <asm/time.h> #include <asm/mpc83xx.h> #include <asm/mmu.h> #include <asm/ppc_sys.h> #include <asm/kgdb.h> +#include <asm/delay.h> #include <syslib/ppc83xx_setup.h> @@ -117,7 +117,34 @@ mpc83xx_early_serial_map(void) void mpc83xx_restart(char *cmd) { + volatile unsigned char __iomem *reg; + unsigned char tmp; + + reg = ioremap(BCSR_PHYS_ADDR, BCSR_SIZE); + local_irq_disable(); + + /* + * Unlock the BCSR bits so a PRST will update the contents. + * Otherwise the reset asserts but doesn't clear. + */ + tmp = in_8(reg + BCSR_MISC_REG3_OFF); + tmp |= BCSR_MISC_REG3_CNFLOCK; /* low true, high false */ + out_8(reg + BCSR_MISC_REG3_OFF, tmp); + + /* + * Trigger a reset via a low->high transition of the + * PORESET bit. + */ + tmp = in_8(reg + BCSR_MISC_REG2_OFF); + tmp &= ~BCSR_MISC_REG2_PORESET; + out_8(reg + BCSR_MISC_REG2_OFF, tmp); + + udelay(1); + + tmp |= BCSR_MISC_REG2_PORESET; + out_8(reg + BCSR_MISC_REG2_OFF, tmp); + for(;;); } |