diff options
Diffstat (limited to 'cpu/ppc4xx/start.S')
| -rw-r--r-- | cpu/ppc4xx/start.S | 77 |
1 files changed, 72 insertions, 5 deletions
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S index 54be37c..d918b3e 100644 --- a/cpu/ppc4xx/start.S +++ b/cpu/ppc4xx/start.S @@ -699,7 +699,9 @@ _start: #endif /* CONFIG_IOP480 */ /*****************************************************************************/ -#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_405) || defined(CONFIG_405EP) +#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \ + defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \ + defined(CONFIG_405) /*----------------------------------------------------------------------- */ /* Clear and set up some registers. */ /*----------------------------------------------------------------------- */ @@ -727,13 +729,13 @@ _start: /*----------------------------------------------------------------------- */ /* Enable two 128MB cachable regions. */ /*----------------------------------------------------------------------- */ - addis r4,r0,0x8000 - addi r4,r4,0x0001 + lis r4,0x8000 + ori r4,r4,0x0001 mticcr r4 /* instruction cache */ isync - addis r4,r0,0x0000 - addi r4,r4,0x0000 + lis r4,0x0000 + ori r4,r4,0x0000 mtdccr r4 /* data cache */ #if !(defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR)) @@ -755,6 +757,70 @@ _start: #endif /* CONFIG_405EP */ #if defined(CFG_OCM_DATA_ADDR) && defined(CFG_OCM_DATA_SIZE) +/* test-only... (clean up later when NAND booting is supported) */ +#if defined(CONFIG_405EZ) + /******************************************************************** + * Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2 + *******************************************************************/ + /* + * We can map the OCM on the PLB3, so map it at + * CFG_OCM_DATA_ADDR + 0x8000 + */ + lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */ + ori r3,r3,CFG_OCM_DATA_ADDR@l + ori r3,r3,0x8270 /* 32K Offset, 16K for Bank 1, R/W/Enable */ + mtdcr ocmplb3cr1,r3 /* Set PLB Access */ + ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */ + mtdcr ocmplb3cr2,r3 /* Set PLB Access */ + isync + + lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */ + ori r3,r3,CFG_OCM_DATA_ADDR@l + ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */ + mtdcr ocmdscr1, r3 /* Set Data Side */ + mtdcr ocmiscr1, r3 /* Set Instruction Side */ + ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */ + mtdcr ocmdscr2, r3 /* Set Data Side */ + mtdcr ocmiscr2, r3 /* Set Instruction Side */ + addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */ + mtdcr ocmdsisdpc,r4 + + isync + +#if defined(CONFIG_NAND_SPL) + /* + * 405EZ can boot from NAND Flash. + * If we are booting the SPL (Pre-loader), copy code from + * the mapped 4K NAND Flash to the OCM + */ + li r4,(CFG_NAND_BOOT_SPL_SIZE >> 2) - 1 + mtctr r4 + lis r2,CFG_NAND_BOOT_SPL_SRC@h + ori r2,r2,CFG_NAND_BOOT_SPL_SRC@l + lis r3,CFG_NAND_BOOT_SPL_DST@h + ori r3,r3,CFG_NAND_BOOT_SPL_DST@l +spl_loop: + lwzu r4,4(r2) + stwu r4,4(r3) + bdnz spl_loop + + /* + * Jump to code in OCM Ram + */ + bl 00f +00: mflr r10 + lis r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@h + ori r3,r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@l + sub r10,r10,r3 + addi r10,r10,28 + mtlr r10 + blr +start_ram: + sync + isync +#endif +#else +/* ...test-only */ /******************************************************************** * Setup OCM - On Chip Memory *******************************************************************/ @@ -774,6 +840,7 @@ _start: addis r4, 0, 0xC000 /* OCM data area enabled */ mtdcr ocmdscntl, r4 isync +#endif /* CONFIG_405EZ */ #endif /*----------------------------------------------------------------------- */ |