Currently, the CCSR gets relocated while translation is enabled, meaning we need 2 BAT translations to get to both the old location and the new location. Also, the DEFAULT CCSR location has a dependency on the BAT that maps the FLASH region. Moving the relocation removes this unnecessary dependency. This makes it easier and more intutive to modify the board's memory map.
Signed-off-by: Becky Bruce becky.bruce@freescale.com --- cpu/mpc86xx/start.S | 29 ++++++++++++++++++++++++----- 1 files changed, 24 insertions(+), 5 deletions(-)
diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S index 75e4317..b1a23b4 100644 --- a/cpu/mpc86xx/start.S +++ b/cpu/mpc86xx/start.S @@ -219,6 +219,11 @@ boot_warm: sync #endif
+#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR) + /* setup ccsrbar now while we're in real mode */ + bl setup_ccsrbar +#endif + /* * Calculate absolute address in FLASH and jump there *------------------------------------------------------*/ @@ -281,10 +286,6 @@ in_flash: bl setup_bats sync
-#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR) - /* setup ccsrbar */ - bl setup_ccsrbar -#endif
/* run low-level CPU init code (from Flash) */ bl cpu_init_f @@ -365,10 +366,28 @@ invalidate_bats: * early_bats: * * Set up bats needed early on - this is usually the BAT for the - * stack-in-cache and the Flash + * stack-in-cache, the Flash, and CCSR space */ .globl early_bats early_bats: + /* IBAT 3 */ + lis r4, CONFIG_SYS_IBAT3L@h + ori r4, r4, CONFIG_SYS_IBAT3L@l + lis r3, CONFIG_SYS_IBAT3U@h + ori r3, r3, CONFIG_SYS_IBAT3U@l + mtspr IBAT3L, r4 + mtspr IBAT3U, r3 + isync + + /* DBAT 3 */ + lis r4, CONFIG_SYS_DBAT3L@h + ori r4, r4, CONFIG_SYS_DBAT3L@l + lis r3, CONFIG_SYS_DBAT3U@h + ori r3, r3, CONFIG_SYS_DBAT3U@l + mtspr DBAT3L, r4 + mtspr DBAT3U, r3 + isync + /* IBAT 5 */ lis r4, CONFIG_SYS_IBAT5L@h ori r4, r4, CONFIG_SYS_IBAT5L@l