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Diffstat (limited to 'arch/m68k/cpu/mcf532x/start.S')
-rw-r--r--arch/m68k/cpu/mcf532x/start.S118
1 files changed, 53 insertions, 65 deletions
diff --git a/arch/m68k/cpu/mcf532x/start.S b/arch/m68k/cpu/mcf532x/start.S
index f25bc541be..302fca5245 100644
--- a/arch/m68k/cpu/mcf532x/start.S
+++ b/arch/m68k/cpu/mcf532x/start.S
@@ -31,42 +31,27 @@
rte;
#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:
+INITSP: .long 0x00000000 /* Initial SP */
+INITPC: .long _START /* Initial PC */
-INITSP: .long 0x00000000 /* Initial SP */
-INITPC: .long _START /* Initial PC */
-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
/* TRAP #0 - #15 */
vector20_2F:
@@ -109,13 +94,13 @@ vector192_255:
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
#endif /* !defined(CONFIG_MONITOR_IS_IN_RAM) */
- .text
+.text
- .globl _start
+.globl _start
_start:
nop
nop
- move.w #0x2700,%sr /* Mask off Interrupt */
+ move.w #0x2700,%sr /* Mask off Interrupt */
#if !defined(CONFIG_MONITOR_IS_IN_RAM)
/* Set vector base register at the beginning of the Flash */
@@ -142,14 +127,14 @@ _start:
#endif
/* 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
@@ -167,13 +152,14 @@ _start:
move.l %sp, %fp
/* initialize reserved area */
- move.l %d0, -(%sp)
+ move.l %d0, -(%sp)
move.l #board_init_f_init_reserve, %a1
jsr (%a1)
/* run low-level CPU init code (from flash) */
- move.l #cpu_init_f, %a1
- jsr (%a1)
+ move.l #cpu_init_f, %a1
+ jsr (%a1)
+
/* run low-level board init code (from flash) */
clr.l %sp@-
move.l #board_init_f, %a1
@@ -181,7 +167,7 @@ _start:
/* board_init_f() does not return */
-/*------------------------------------------------------------------------------*/
+/******************************************************************************/
/*
* void relocate_code (addr_sp, gd, addr_moni)
@@ -194,23 +180,23 @@ _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
@@ -240,7 +226,7 @@ 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
@@ -254,38 +240,40 @@ 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
+.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