diff options
Diffstat (limited to 'arch/m68k/cpu/mcf530x/start.S')
| -rw-r--r-- | arch/m68k/cpu/mcf530x/start.S | 73 |
1 files changed, 38 insertions, 35 deletions
diff --git a/arch/m68k/cpu/mcf530x/start.S b/arch/m68k/cpu/mcf530x/start.S index ca8bb32..da41c9a 100644 --- a/arch/m68k/cpu/mcf530x/start.S +++ b/arch/m68k/cpu/mcf530x/start.S @@ -36,12 +36,12 @@ #if !defined(CONFIG_MONITOR_IS_IN_RAM) .text + /* - * Vector table. This is used for initial platform startup. - * These vectors are to catch any un-intended traps. + * Vector table. This is used for initial platform startup. + * These vectors are to catch any un-intended traps. */ _vectors: - /* Flash offset is 0 until we setup CS0 */ .long 0x00000000 #if defined(CONFIG_M5307) && \ @@ -89,12 +89,13 @@ _vectors: #endif - .text - .globl _start +.text + +.globl _start _start: nop nop - move.w #0x2700,%sr + move.w #0x2700,%sr /* set MBAR address + valid flag */ move.l #(CONFIG_SYS_MBAR + 1), %d0 @@ -104,11 +105,11 @@ _start: move.c %d0, %RAMBAR /* DS 4.8.2 (Cache Organization) invalidate and disable cache */ - move.l #CF_CACR_CINVA, %d0 - movec %d0, %CACR - move.l #0, %d0 - movec %d0, %ACR0 - movec %d0, %ACR1 + move.l #CF_CACR_CINVA, %d0 + movec %d0, %CACR + move.l #0, %d0 + movec %d0, %ACR0 + movec %d0, %ACR1 /* * if we come from a pre-loader we have no exception table and @@ -127,10 +128,10 @@ _start: move.l %d0, (%a2) /* put relocation table address to a5 */ - move.l #__got_start, %a5 + move.l #__got_start, %a5 /* setup stack initially on top of internal static ram */ - move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp + move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp /* * if configured, malloc_f arena will be reserved first, @@ -140,23 +141,23 @@ _start: bsr board_init_f_alloc_reserve /* update stack and frame-pointers */ - move.l %d0, %sp - move.l %sp, %fp + move.l %d0, %sp + move.l %sp, %fp /* initialize reserved area */ - move.l %d0, -(%sp) - bsr board_init_f_init_reserve + move.l %d0, -(%sp) + bsr board_init_f_init_reserve /* run low-level CPU init code (from flash) */ - bsr cpu_init_f + bsr cpu_init_f /* run low-level board init code (from flash) */ - clr.l %sp@- - bsr board_init_f + clr.l %sp@- + bsr board_init_f /* board_init_f() does not return */ -/*--------------------------------------------------------------------------*/ +/******************************************************************************/ /* * void relocate_code (addr_sp, gd, addr_moni) @@ -165,7 +166,7 @@ _start: * after relocating the monitor code. * */ - .globl relocate_code +.globl relocate_code relocate_code: link.w %a6,#0 move.l 8(%a6), %sp /* set new stack pointer */ @@ -209,7 +210,8 @@ clear_bss: */ move.l %a0, %a1 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE), %a1 - /* * fix got pointer register a5 */ + + /* fix got pointer register a5 */ move.l %a1,%a5 move.l %a0, %a2 @@ -236,33 +238,34 @@ clear_bss: #endif jsr (%a1) -/*--------------------------------------------------------------------------*/ +/******************************************************************************/ + /* exception code */ - .globl _fault +.globl _fault _fault: bra _fault - .globl _exc_handler +.globl _exc_handler _exc_handler: SAVE_ALL movel %sp,%sp@- - bsr exc_handler + bsr exc_handler addql #4,%sp RESTORE_ALL - .globl _int_handler +.globl _int_handler _int_handler: SAVE_ALL movel %sp,%sp@- - bsr int_handler + bsr int_handler addql #4,%sp RESTORE_ALL -/*--------------------------------------------------------------------------*/ +/******************************************************************************/ - .globl version_string +.globl version_string version_string: - .ascii U_BOOT_VERSION - .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" - .ascii CONFIG_IDENT_STRING, "\0" - .align 4 +.ascii U_BOOT_VERSION +.ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" +.ascii CONFIG_IDENT_STRING, "\0" +.align 4 |