diff options
Diffstat (limited to 'cpu/mpc5xx/start.S')
| -rw-r--r-- | cpu/mpc5xx/start.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/cpu/mpc5xx/start.S b/cpu/mpc5xx/start.S index 548ec99e2c..b56be2f30a 100644 --- a/cpu/mpc5xx/start.S +++ b/cpu/mpc5xx/start.S @@ -117,6 +117,29 @@ boot_warm: mtspr COUNTA, r0 mtspr COUNTB, r0 +#if defined(CONFIG_PATI) + /* the external flash access on PATI fails if programming the PLL to 40MHz. + * Copy the PLL programming code to the internal RAM and execute it + *----------------------------------------------------------------------*/ + lis r3, CFG_MONITOR_BASE@h + ori r3, r3, CFG_MONITOR_BASE@l + addi r3, r3, pll_prog_code_start - _start + EXC_OFF_SYS_RESET + + lis r4, CFG_INIT_RAM_ADDR@h + ori r4, r4, CFG_INIT_RAM_ADDR@l + mtlr r4 + addis r5,0,0x0 + ori r5,r5,((pll_prog_code_end - pll_prog_code_start) >>2) + mtctr r5 + addi r3, r3, -4 + addi r4, r4, -4 +0: + lwzu r0,4(r3) + stwu r0,4(r4) + bdnz 0b /* copy loop */ + blrl +#endif + /* * Calculate absolute address in FLASH and jump there *----------------------------------------------------------------------*/ @@ -553,3 +576,30 @@ trap_reloc: isync blr + + +#if defined(CONFIG_PATI) +/* Program the PLL */ +pll_prog_code_start: + lis r4, (CFG_IMMR + 0x002fc384)@h + ori r4, r4, (CFG_IMMR + 0x002fc384)@l + lis r3, (0x55ccaa33)@h + ori r3, r3, (0x55ccaa33)@l + stw r3, 0(r4) + lis r4, (CFG_IMMR + 0x002fc284)@h + ori r4, r4, (CFG_IMMR + 0x002fc284)@l + lis r3, CFG_PLPRCR@h + ori r3, r3, CFG_PLPRCR@l + stw r3, 0(r4) + addis r3,0,0x0 + ori r3,r3,0xA000 + mtctr r3 +..spinlp: + bdnz ..spinlp /* spin loop */ + blr +pll_prog_code_end: + nop + blr +#endif + + |