diff options
Diffstat (limited to 'arch/m68k/cpu/mcf5227x/start.S')
| -rw-r--r-- | arch/m68k/cpu/mcf5227x/start.S | 153 |
1 files changed, 71 insertions, 82 deletions
diff --git a/arch/m68k/cpu/mcf5227x/start.S b/arch/m68k/cpu/mcf5227x/start.S index 13c036f746..b5d51bdee7 100644 --- a/arch/m68k/cpu/mcf5227x/start.S +++ b/arch/m68k/cpu/mcf5227x/start.S @@ -28,52 +28,37 @@ rte; #if defined(CONFIG_CF_SBF) -#define ASM_DRAMINIT (asm_dram_init - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR) -#define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR) +#define ASM_DRAMINIT (asm_dram_init - CONFIG_SYS_TEXT_BASE + \ + CONFIG_SYS_INIT_RAM_ADDR) +#define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + \ + CONFIG_SYS_INIT_RAM_ADDR) #endif .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: - #if defined(CONFIG_CF_SBF) -INITSP: .long 0 /* Initial SP */ -INITPC: .long ASM_DRAMINIT /* Initial PC */ +INITSP: .long 0 /* Initial SP */ +INITPC: .long ASM_DRAMINIT /* Initial PC */ #else -INITSP: .long 0 /* Initial SP */ -INITPC: .long _START /* Initial PC */ +INITSP: .long 0 /* Initial SP */ +INITPC: .long _START /* Initial PC */ #endif -vector02: .long _FAULT /* Access Error */ -vector03: .long _FAULT /* Address Error */ -vector04: .long _FAULT /* Illegal Instruction */ -vector05: .long _FAULT /* Reserved */ -vector06: .long _FAULT /* Reserved */ -vector07: .long _FAULT /* Reserved */ -vector08: .long _FAULT /* Privilege Violation */ -vector09: .long _FAULT /* Trace */ -vector0A: .long _FAULT /* Unimplemented A-Line */ -vector0B: .long _FAULT /* Unimplemented F-Line */ -vector0C: .long _FAULT /* Debug Interrupt */ -vector0D: .long _FAULT /* Reserved */ -vector0E: .long _FAULT /* Format Error */ -vector0F: .long _FAULT /* Unitialized Int. */ +vector02_0F: +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT /* Reserved */ vector10_17: .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -vector18: .long _FAULT /* Spurious Interrupt */ -vector19: .long _FAULT /* Autovector Level 1 */ -vector1A: .long _FAULT /* Autovector Level 2 */ -vector1B: .long _FAULT /* Autovector Level 3 */ -vector1C: .long _FAULT /* Autovector Level 4 */ -vector1D: .long _FAULT /* Autovector Level 5 */ -vector1E: .long _FAULT /* Autovector Level 6 */ -vector1F: .long _FAULT /* Autovector Level 7 */ +vector18_1F: +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT #if !defined(CONFIG_CF_SBF) /* TRAP #0 - #15 */ @@ -120,15 +105,16 @@ vector192_255: #if defined(CONFIG_CF_SBF) /* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */ asm_sbf_img_hdr: - .long 0x00000000 /* checksum, not yet implemented */ - .long 0x00020000 /* image length */ + .long 0x00000000 /* checksum, not yet implemented */ + .long 0x00020000 /* image length */ .long CONFIG_SYS_TEXT_BASE /* image to be relocated at */ asm_dram_init: move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 - movec %d0, %RAMBAR1 /* init Rambar */ + movec %d0, %RAMBAR1 /* init Rambar */ + move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp - clr.l %sp@- + clr.l %sp@- /* Must disable global address */ move.l #0xFC008000, %a1 @@ -142,7 +128,6 @@ asm_dram_init: * Dram Initialization * a1, a2, and d0 */ - /* mscr sdram */ move.l #0xFC0A4074, %a1 move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1) nop @@ -336,15 +321,15 @@ asm_dspi_rd_status: move.b (%a3), %d1 rts -#endif /* CONFIG_CF_SBF */ +#endif /* CONFIG_CF_SBF */ - .text +.text . = 0x400 - .globl _start +.globl _start _start: nop nop - move.w #0x2700,%sr /* Mask off Interrupt */ + move.w #0x2700,%sr /* Mask off Interrupt */ /* Set vector base register at the beginning of the Flash */ #if defined(CONFIG_CF_SBF) @@ -366,17 +351,17 @@ _start: movec %d0, %ACR1 /* initialize general use internal ram */ - move.l #0, %d0 - move.l #(ICACHE_STATUS), %a1 /* icache */ - move.l #(DCACHE_STATUS), %a2 /* icache */ - move.l %d0, (%a1) - move.l %d0, (%a2) + move.l #0, %d0 + move.l #(ICACHE_STATUS), %a1 /* icache */ + move.l #(DCACHE_STATUS), %a2 /* icache */ + move.l %d0, (%a1) + 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, @@ -386,20 +371,23 @@ _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 + clr.l %sp@- - bsr cpu_init_f /* run low-level CPU init code (from flash) */ - clr.l %sp@- - bsr board_init_f /* run low-level board init code (from flash) */ + /* run low-level board init code (from flash) */ + bsr board_init_f /* board_init_f() does not return */ -/*------------------------------------------------------------------------------*/ +/******************************************************************************/ /* * void relocate_code (addr_sp, gd, addr_moni) @@ -412,23 +400,23 @@ _start: * r5 = length in bytes * r6 = cachelinesize */ - .globl relocate_code +.globl relocate_code relocate_code: - link.w %a6,#0 - move.l 8(%a6), %sp /* set new stack pointer */ + link.w %a6,#0 + move.l 8(%a6), %sp /* set new stack pointer */ - move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ - move.l 16(%a6), %a0 /* Save copy of Destination Address */ + move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ + move.l 16(%a6), %a0 /* Save copy of Destination Address */ - move.l #CONFIG_SYS_MONITOR_BASE, %a1 - move.l #__init_end, %a2 - move.l %a0, %a3 + move.l #CONFIG_SYS_MONITOR_BASE, %a1 + move.l #__init_end, %a2 + move.l %a0, %a3 /* copy the code to RAM */ 1: - move.l (%a1)+, (%a3)+ - cmp.l %a1,%a2 - bgt.s 1b + move.l (%a1)+, (%a3)+ + cmp.l %a1,%a2 + bgt.s 1b /* * We are done. Do not return, instead branch to second part of board @@ -458,7 +446,7 @@ clear_bss: */ move.l %a0, %a1 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 - move.l %a1,%a5 /* * fix got pointer register a5 */ + move.l %a1,%a5 /* fix got pointer register a5 */ move.l %a0, %a2 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 @@ -472,39 +460,40 @@ clear_bss: bne 7b /* calculate relative jump to board_init_r in ram */ - move.l %a0, %a1 - add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 + move.l %a0, %a1 + add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 /* set parameters for board_init_r */ - move.l %a0,-(%sp) /* dest_addr */ - move.l %d0,-(%sp) /* gd */ + move.l %a0,-(%sp) /* dest_addr */ + move.l %d0,-(%sp) /* gd */ jsr (%a1) -/*------------------------------------------------------------------------------*/ +/******************************************************************************/ + /* exception code */ - .globl _fault +.globl _fault _fault: - bra _fault - .globl _exc_handler + bra _fault +.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_STRING, "\0" - .align 4 +.ascii U_BOOT_VERSION_STRING, "\0" +.align 4 |