diff options
Diffstat (limited to 'cpu/mcf52x2/start.S')
| -rw-r--r-- | cpu/mcf52x2/start.S | 65 |
1 files changed, 32 insertions, 33 deletions
diff --git a/cpu/mcf52x2/start.S b/cpu/mcf52x2/start.S index 260a09a..2bc0df3 100644 --- a/cpu/mcf52x2/start.S +++ b/cpu/mcf52x2/start.S @@ -56,9 +56,7 @@ _vectors: .long 0x00000000 /* Flash offset is 0 until we setup CS0 */ -#if defined(CONFIG_R5200) -.long 0x400 -#elif defined(CONFIG_M5282) && (TEXT_BASE == CFG_INT_FLASH_BASE) +#if defined(CONFIG_M5282) && (TEXT_BASE == CFG_INT_FLASH_BASE) .long _start - TEXT_BASE #else .long _START @@ -160,7 +158,7 @@ _copy_flash: _flashbar_setup: /* Initialize FLASHBAR: locate internal Flash and validate it */ move.l #(CFG_INT_FLASH_BASE + CFG_INT_FLASH_ENABLE), %d0 - movec %d0, %RAMBAR0 + movec %d0, %FLASHBAR jmp _after_flashbar_copy.L /* Force jump to absolute address */ _flashbar_setup_end: nop @@ -168,7 +166,7 @@ _after_flashbar_copy: #else /* Setup code to initialize FLASHBAR, if start from external Memory */ move.l #(CFG_INT_FLASH_BASE + CFG_INT_FLASH_ENABLE), %d0 - movec %d0, %RAMBAR0 + movec %d0, %RAMBAR1 #endif /* (TEXT_BASE == CFG_INT_FLASH_BASE) */ #endif @@ -185,16 +183,15 @@ _after_flashbar_copy: movec %d0, %VBR #endif -#ifdef CONFIG_R5200 - move.l #(_flash_setup-CFG_FLASH_BASE), %a0 - move.l #(_flash_setup_end-CFG_FLASH_BASE), %a1 - move.l #(CFG_INIT_RAM_ADDR), %a2 -_copy_flash: - move.l (%a0)+, (%a2)+ - cmp.l %a0, %a1 - bgt.s _copy_flash - jmp CFG_INIT_RAM_ADDR -_after_flash_copy: +#ifdef CONFIG_M5275 + /* Initialize IPSBAR */ + move.l #(CFG_MBAR + 1), %d0 /* set IPSBAR address + valid flag */ + move.l %d0, 0x40000000 +/* movec %d0, %MBAR */ + + /* Initialize RAMBAR: locate SRAM and validate it */ + move.l #(CFG_INIT_RAM_ADDR + 0x21), %d0 + movec %d0, %RAMBAR1 #endif #if 0 @@ -219,24 +216,6 @@ _after_flash_copy: /*------------------------------------------------------------------------------*/ -#ifdef CONFIG_R5200 -_flash_setup: - /* CSAR0 */ - move.l #((CFG_FLASH_BASE & 0xffff0000) >> 16), %d0 - move.w %d0, 0x40000080 - - /* CSCR0 */ - move.l #0x2180, %d0 /* 8 wait states, 16bit port, auto ack, */ - move.w %d0, 0x4000008A - - /* CSMR0 */ - move.l #0x001f0001, %d0 /* 2 MB, valid */ - move.l %d0, 0x40000084 - - jmp _after_flash_copy.L -_flash_setup_end: -#endif - /* * void relocate_code (addr_sp, gd, addr_moni) * @@ -394,6 +373,25 @@ icache_enable: rts #endif +#if defined(CONFIG_M5275) +/* + * Instruction cache only + */ + .globl icache_enable +icache_enable: + move.l #0x01400000, %d0 /* Invalidate cache cmd */ + movec %d0, %CACR /* Invalidate cache */ + move.l #0x0000c000, %d0 /* Setup SDRAM caching */ + movec %d0, %ACR0 /* Enable cache */ + move.l #0x00000000, %d0 /* No other caching */ + movec %d0, %ACR1 /* Enable cache */ + move.l #0x80400100, %d0 /* Setup cache mask */ + movec %d0, %CACR /* Enable cache */ + moveq #1, %d0 + move.l %d0, icache_state + rts +#endif + #ifdef CONFIG_M5282 .globl icache_enable icache_enable: @@ -478,3 +476,4 @@ version_string: .ascii U_BOOT_VERSION .ascii " (", __DATE__, " - ", __TIME__, ")" .ascii CONFIG_IDENT_STRING, "\0" + .align 4 |