diff options
Diffstat (limited to 'cpu/mpc83xx/start.S')
| -rw-r--r-- | cpu/mpc83xx/start.S | 79 |
1 files changed, 38 insertions, 41 deletions
diff --git a/cpu/mpc83xx/start.S b/cpu/mpc83xx/start.S index e9f07901b..fb001a654 100644 --- a/cpu/mpc83xx/start.S +++ b/cpu/mpc83xx/start.S @@ -28,7 +28,7 @@ */ #include <config.h> -#include <mpc83xx.h> +#include <mpc83xx.h> #include <version.h> #define CONFIG_83XX 1 /* needed for Linux kernel header files*/ @@ -89,7 +89,7 @@ version_string: .ascii U_BOOT_VERSION .ascii " (", __DATE__, " - ", __TIME__, ")" .ascii " ", CONFIG_IDENT_STRING, "\0" - + .text #define _HRCW_TABLE_ENTRY(w) \ .fill 8,1,(((w)>>24)&0xff); \ @@ -101,7 +101,6 @@ version_string: _HRCW_TABLE_ENTRY(CFG_HRCW_HIGH) - #ifndef CONFIG_DEFAULT_IMMR #error CONFIG_DEFAULT_IMMR must be defined #endif /* CFG_DEFAULT_IMMR */ @@ -143,7 +142,7 @@ _start: /* time t 0 */ . = EXC_OFF_SYS_RESET + 0x10 .globl _start_warm -_start_warm: +_start_warm: li r21, BOOTFLAG_WARM /* Software reboot */ b boot_warm @@ -156,12 +155,12 @@ boot_warm: /* time t 5 */ lis r3, CFG_IMMRBAR@h ori r3, r3, CFG_IMMRBAR@l stw r3, IMMRBAR(r4) - + /* Initialise the E300 processor core */ /*------------------------------------------*/ - + bl init_e300_core - + #ifndef CFG_RAMBOOT /* Inflate flash location so it appears everywhere, calculate */ @@ -218,7 +217,7 @@ _start_of_vectors: /* External Interrupt exception. */ #ifndef FIXME STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt) -#endif +#endif /* Alignment exception. */ . = 0x600 @@ -417,9 +416,9 @@ init_e300_core: /* time t 10 */ lis r4, CFG_WATCHDOG_VALUE ori r4, r4, (SWCRR_SWEN | SWCRR_SWRI | SWCRR_SWPR) stw r4, SWCRR(r3) - + /* and reset it */ - + li r4, 0x556C sth r4, SWSRR@l(r3) li r4, 0xAA39 @@ -502,7 +501,7 @@ init_e300_core: /* time t 10 */ /* Done! */ /*------------------------------*/ - blr + blr /* Cache functions. * @@ -645,8 +644,8 @@ relocate_code: mtctr r0 la r8,-4(r4) la r7,-4(r3) - - /* and compare */ + + /* and compare */ 20: lwzu r20,4(r8) lwzu r21,4(r7) xor. r22, r20, r21 @@ -664,21 +663,19 @@ relocate_code: 3: lwzu r0,-4(r8) stwu r0,-4(r7) bdnz 3b - - /* * Now flush the cache: note that we must start from a cache aligned * address. Otherwise we might miss one cache line. */ -4: +4: bl un_setup_stack_in_data_cache mr r7, r3 mr r8, r4 bl dcache_disable mr r3, r7 mr r4, r8 - + cmpwi r6,0 add r5,r3,r5 beq 7f /* Always flush prefetch queue in any case */ @@ -889,9 +886,9 @@ map_flash_by_law1: /* Address Mask in OR0 so ROM appears everywhere */ /*----------------------------------------------------*/ lis r3, (CFG_IMMRBAR)@h /* r3 <= CFG_IMMRBAR */ - lwz r4, OR0@l(r3) + lwz r4, OR0@l(r3) li r5, 0x7fff /* r5 <= 0x00007FFFF */ - and r4, r4, r5 + and r4, r4, r5 stw r4, OR0@l(r3) /* OR0 <= OR0 & 0x00007FFFF */ /* As MPC8349E User's Manual presented, when RCW[BMS] is set to 0, @@ -926,9 +923,9 @@ remap_flash_by_law0: /* Initialize the BR0 with the boot ROM starting address. */ lwz r4, BR0(r3) li r5, 0x7FFF - and r4, r4, r5 + and r4, r4, r5 lis r5, (CFG_FLASH_BASE & 0xFFFF8000)@h - ori r5, r5, (CFG_FLASH_BASE & 0xFFFF8000)@l + ori r5, r5, (CFG_FLASH_BASE & 0xFFFF8000)@l or r5, r5, r4 stw r5, BR0(r3) /* r5 <= (CFG_FLASH_BASE & 0xFFFF8000) | (BR0 & 0x00007FFF) */ @@ -950,9 +947,9 @@ remap_flash_by_law0: stw r4, LBLAWAR1(r3) /* Off LBIU LAW1 */ blr -setup_stack_in_data_cache_on_r1: +setup_stack_in_data_cache_on_r1: lis r3, (CFG_IMMRBAR)@h - + /* setup D-BAT for the D-Cache (with out real memory backup) */ lis r4, (CFG_INIT_RAM_ADDR & 0xFFFE0000)@h @@ -961,13 +958,13 @@ setup_stack_in_data_cache_on_r1: mtspr DBAT0L, r4 isync -#if 0 +#if 0 /* Enable MMU */ mfmsr r4 ori r4, r4, (MSR_DR | MSR_IR)@l mtmsr r4 -#endif - +#endif + /* Enable and invalidate data cache. */ mfspr r4, HID0 mr r5, r4 @@ -977,19 +974,19 @@ setup_stack_in_data_cache_on_r1: mtspr HID0, r4 mtspr HID0, r5 sync - + /* Allocate Initial RAM in data cache.*/ li r0, 0 lis r4, (CFG_INIT_RAM_ADDR)@h ori r4, r4, (CFG_INIT_RAM_ADDR)@l - li r5, 128*8 /* 128*8*32=32Kb */ + li r5, 128*8 /* 128*8*32=32Kb */ mtctr r5 1: dcbz r0, r4 addi r4, r4, 32 bdnz 1b isync - + /* Lock all the D-cache, basically leaving the reset of the program without dcache */ mfspr r4, HID0 ori r4, r4, (HID0_DLOCK)@l @@ -1010,14 +1007,14 @@ un_setup_stack_in_data_cache: blr mr r14, r4 mr r15, r5 - + lis r4, (CFG_INIT_RAM_ADDR & 0xFFFE0000)@h mtspr DBAT0U, r4 ori r4, r4, 0x0002 mtspr DBAT0L, r4 isync - + /* un lock all the D-cache */ mfspr r4, HID0 lis r5, (~(HID0_DLOCK))@h @@ -1030,20 +1027,20 @@ un_setup_stack_in_data_cache: li r0, 0 lis r4, (CFG_INIT_RAM_ADDR)@h ori r4, r4, (CFG_INIT_RAM_ADDR)@l - li r5, 128*8 /* 128*8*32=32Kb */ + li r5, 128*8 /* 128*8*32=32Kb */ mtctr r5 1: dcbz r0, r4 addi r4, r4, 32 bdnz 1b isync - + mflr r16 bl dcache_disable mtlr r16 - + blr - + #if 0 #define GREEN_LIGHT 0x2B0D4046 #define RED_LIGHT 0x250D4046 @@ -1054,7 +1051,7 @@ un_setup_stack_in_data_cache: */ .globl liblight -liblight: +liblight: lis r3, CFG_IMMRBAR@h ori r3, r3, CFG_IMMRBAR@l li r4, 0x3002 @@ -1063,7 +1060,7 @@ liblight: mtspr HID0, r4 mtspr HID2, r4 lis r4, 0xF8000000@h - ori r4, r4, 0xF8000000@l + ori r4, r4, 0xF8000000@l stw r4, LBLAWBAR1(r3) lis r4, 0x8000000E@h ori r4, r4, 0x8000000E@l @@ -1083,14 +1080,14 @@ liblight: ori r6, r6, RED_LIGHT@l lis r7, LIB_CNT@h ori r7, r7, LIB_CNT@l - + 1: stw r5, 0(r4) - mtctr r7 + mtctr r7 2: bdnz 2b stw r6, 0(r4) - mtctr r7 + mtctr r7 3: bdnz 3b b 1b - + #endif |