diff options
Diffstat (limited to 'cpu/mpc86xx/start.S')
| -rw-r--r-- | cpu/mpc86xx/start.S | 119 |
1 files changed, 66 insertions, 53 deletions
diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S index 09f4ceedb..c71c92659 100644 --- a/cpu/mpc86xx/start.S +++ b/cpu/mpc86xx/start.S @@ -235,17 +235,8 @@ in_flash: bl enable_ext_addr /* setup the bats */ - bl setup_bats - sync - -#if (CFG_CCSRBAR_DEFAULT != CFG_CCSRBAR) - /* setup ccsrbar */ - bl setup_ccsrbar -#endif + bl early_bats - /* setup the law entries */ - bl law_entry - sync /* * Cache must be enabled here for stack-in-cache trick. * This means we need to enable the BATS. @@ -282,6 +273,16 @@ in_flash: GET_GOT /* initialize GOT access */ + /* setup the rest of the bats */ + bl setup_bats + bl clear_tlbs + sync + +#if (CFG_CCSRBAR_DEFAULT != CFG_CCSRBAR) + /* setup ccsrbar */ + bl setup_ccsrbar +#endif + /* run low-level CPU init code (from Flash) */ bl cpu_init_f sync @@ -359,6 +360,7 @@ invalidate_bats: /* setup_bats - set them up to some initial state */ + /* Skip any BATS setup in early_bats */ .globl setup_bats setup_bats: @@ -454,42 +456,6 @@ setup_bats: mtspr DBAT4U, r3 isync - /* IBAT 5 */ - addis r4, r0, CFG_IBAT5L@h - ori r4, r4, CFG_IBAT5L@l - addis r3, r0, CFG_IBAT5U@h - ori r3, r3, CFG_IBAT5U@l - mtspr IBAT5L, r4 - mtspr IBAT5U, r3 - isync - - /* DBAT 5 */ - addis r4, r0, CFG_DBAT5L@h - ori r4, r4, CFG_DBAT5L@l - addis r3, r0, CFG_DBAT5U@h - ori r3, r3, CFG_DBAT5U@l - mtspr DBAT5L, r4 - mtspr DBAT5U, r3 - isync - - /* IBAT 6 */ - addis r4, r0, CFG_IBAT6L@h - ori r4, r4, CFG_IBAT6L@l - addis r3, r0, CFG_IBAT6U@h - ori r3, r3, CFG_IBAT6U@l - mtspr IBAT6L, r4 - mtspr IBAT6U, r3 - isync - - /* DBAT 6 */ - addis r4, r0, CFG_DBAT6L@h - ori r4, r4, CFG_DBAT6L@l - addis r3, r0, CFG_DBAT6U@h - ori r3, r3, CFG_DBAT6U@l - mtspr DBAT6L, r4 - mtspr DBAT6U, r3 - isync - /* IBAT 7 */ addis r4, r0, CFG_IBAT7L@h ori r4, r4, CFG_IBAT7L@l @@ -508,18 +474,65 @@ setup_bats: mtspr DBAT7U, r3 isync -1: - addis r3, 0, 0x0000 - addis r5, 0, 0x4 /* upper bound of 0x00040000 for 7400/750 */ + sync + blr + +/* + * early_bats: + * + * Set up bats needed early on - this is usually the BAT for the + * stack-in-cache and the Flash + */ + .globl early_bats +early_bats: + /* IBAT 5 */ + lis r4, CFG_IBAT5L@h + ori r4, r4, CFG_IBAT5L@l + lis r3, CFG_IBAT5U@h + ori r3, r3, CFG_IBAT5U@l + mtspr IBAT5L, r4 + mtspr IBAT5U, r3 + isync + + /* DBAT 5 */ + lis r4, CFG_DBAT5L@h + ori r4, r4, CFG_DBAT5L@l + lis r3, CFG_DBAT5U@h + ori r3, r3, CFG_DBAT5U@l + mtspr DBAT5L, r4 + mtspr DBAT5U, r3 + isync + + /* IBAT 6 */ + lis r4, CFG_IBAT6L@h + ori r4, r4, CFG_IBAT6L@l + lis r3, CFG_IBAT6U@h + ori r3, r3, CFG_IBAT6U@l + mtspr IBAT6L, r4 + mtspr IBAT6U, r3 isync + /* DBAT 6 */ + lis r4, CFG_DBAT6L@h + ori r4, r4, CFG_DBAT6L@l + lis r3, CFG_DBAT6U@h + ori r3, r3, CFG_DBAT6U@l + mtspr DBAT6L, r4 + mtspr DBAT6U, r3 + isync + blr + + .globl clear_tlbs +clear_tlbs: + addis r3, 0, 0x0000 + addis r5, 0, 0x4 + isync tlblp: - tlbie r3 + tlbie r3 sync - addi r3, r3, 0x1000 - cmp 0, 0, r3, r5 + addi r3, r3, 0x1000 + cmp 0, 0, r3, r5 blt tlblp - blr .globl enable_addr_trans |