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mpc83xx: Add support for the display of reset status 

83xx processor family has many reset sources, such as
power on reset, software hard reset, software soft reset,
JTAG, bus monitor, software watchdog, check stop reset,
external hard reset, external software reset.
sometimes, to figure out the fault of system, we need to
know the cause of reset early before the prompt of
u-boot present.

Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
This commit is contained in:
Dave Liu 2007-06-25 10:41:56 +08:00 committed by Kim Phillips
parent ff9658d704
commit 9be39a67c9
3 changed files with 42 additions and 2 deletions
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36
cpu/mpc83xx/cpu_init.c
View File

@ -257,3 +257,39 @@ int cpu_init_r (void)
#endif
return 0;
}
/*
* Figure out the cause of the reset
*/
int prt_83xx_rsr(void)
{
static struct {
ulong mask;
char *desc;
} bits[] = {
{
RSR_SWSR, "Software Soft"}, {
RSR_SWHR, "Software Hard"}, {
RSR_JSRS, "JTAG Soft"}, {
RSR_CSHR, "Check Stop"}, {
RSR_SWRS, "Software Watchdog"}, {
RSR_BMRS, "Bus Monitor"}, {
RSR_SRS, "External/Internal Soft"}, {
RSR_HRS, "External/Internal Hard"}
};
static int n = sizeof bits / sizeof bits[0];
ulong rsr = gd->reset_status;
int i;
char *sep;
puts("Reset Status:");
sep = " ";
for (i = 0; i < n; i++)
if (rsr & bits[i].mask) {
printf("%s%s", sep, bits[i].desc);
sep = ", ";
}
puts("\n\n");
return 0;
}

2
include/common.h
View File

@ -526,6 +526,8 @@ void cpu_init_f (void);
int cpu_init_r (void);
#if defined(CONFIG_8260)
int prt_8260_rsr (void);
#elif defined(CONFIG_MPC83XX)
int prt_83xx_rsr (void);
#endif
/* $(CPU)/interrupts.c */

6
lib_ppc/board.c
View File

@ -309,7 +309,9 @@ init_fnc_t *init_sequence[] = {
prt_8260_rsr,
prt_8260_clks,
#endif /* CONFIG_8260 */
#if defined(CONFIG_MPC83XX)
prt_83xx_rsr,
#endif
checkcpu,
#if defined(CONFIG_MPC5xxx)
prt_mpc5xxx_clks,
@ -376,7 +378,7 @@ void board_init_f (ulong bootflag)
/* compiler optimization barrier needed for GCC >= 3.4 */
__asm__ __volatile__("": : :"memory");
#if !defined(CONFIG_CPM2)
#if !defined(CONFIG_CPM2) && !defined(CONFIG_MPC83XX)
/* Clear initial global data */
memset ((void *) gd, 0, sizeof (gd_t));
#endif