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u-boot: Fix e500 v2 core reset bug 

The following patch fixes the e500 v2 core reset bug.
For e500 v2 core, a new reset control register is added to reset the
processor.

Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
This commit is contained in:
Zang Roy-r61911 2006-12-05 16:42:30 +08:00 committed by Andrew Fleming-AFLEMING
parent 63247a5acd
commit 96629cbabd
1 changed files with 15 additions and 6 deletions
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21
cpu/mpc85xx/cpu.c
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@ -140,16 +140,25 @@ int checkcpu (void)
int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
{
uint pvr;
uint ver;
pvr = get_pvr();
ver = PVR_VER(pvr);
if (ver & 1){
/* e500 v2 core has reset control register */
volatile unsigned int * rstcr;
rstcr = (volatile unsigned int *)(CFG_IMMR + 0xE00B0);
*rstcr = 0x2; /* HRESET_REQ */
}else{
/*
* Initiate hard reset in debug control register DBCR0
* Make sure MSR[DE] = 1
*/
unsigned long val;
val = mfspr(DBCR0);
val |= 0x70000000;
mtspr(DBCR0,val);
unsigned long val;
val = mfspr(DBCR0);
val |= 0x70000000;
mtspr(DBCR0,val);
}
return 1;
}