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authorwdenk <wdenk>2003-06-27 21:31:46 +0000
committerwdenk <wdenk>2003-06-27 21:31:46 +0000
commit8bde7f776c77b343aca29b8c7b58464d915ac245 (patch)
tree20f1fd99975215e7c658454a15cdb4ed4694e2d4 /cpu/i386/start.S
parent993cad9364c6b87ae429d1ed1130d8153f6f027e (diff)
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* Code cleanup:
- remove trailing white space, trailing empty lines, C++ comments, etc. - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c) * Patches by Kenneth Johansson, 25 Jun 2003: - major rework of command structure (work done mostly by Michal Cendrowski and Joakim Kristiansen)
Diffstat (limited to 'cpu/i386/start.S')
-rw-r--r--cpu/i386/start.S122
1 files changed, 60 insertions, 62 deletions
diff --git a/cpu/i386/start.S b/cpu/i386/start.S
index 025555c..afcbb24 100644
--- a/cpu/i386/start.S
+++ b/cpu/i386/start.S
@@ -1,5 +1,5 @@
/*
- * U-boot - i386 Startup Code
+ * U-boot - i386 Startup Code
*
* Copyright (c) 2002 Omicron Ceti AB, Daniel Engstr�m <denaiel@omicron.se>
*
@@ -26,71 +26,71 @@
#include <config.h>
#include <version.h>
-
+
.section .text
.code32
.globl _start
-.type _start, @function
+.type _start, @function
.globl _i386boot_start
_i386boot_start:
-_start:
- movl $0x18,%eax /* Load our segement registes, the
- * gdt have already been loaded by start16.S */
- movw %ax,%fs
+_start:
+ movl $0x18,%eax /* Load our segement registes, the
+ * gdt have already been loaded by start16.S */
+ movw %ax,%fs
movw %ax,%ds
- movw %ax,%gs
- movw %ax,%es
- movw %ax,%ss
-
+ movw %ax,%gs
+ movw %ax,%es
+ movw %ax,%ss
+
/* We call a few functions in the board support package
* since we have no stack yet we'll have to use %ebp
* to store the return address */
-
+
/* Early platform init (setup gpio, etc ) */
mov $early_board_init_ret, %ebp
jmp early_board_init
early_board_init_ret:
-
+
/* The __port80 entry-point should be usabe by now */
/* so we try to indicate progress */
- movw $0x01, %ax
+ movw $0x01, %ax
movl $.progress0, %ebp
jmp __show_boot_progress
-.progress0:
+.progress0:
/* size memory */
mov $mem_init_ret, %ebp
- jmp mem_init
+ jmp mem_init
mem_init_ret:
-
- /* check ammount of configured memory
- * (we need atleast bss start+bss size+stack size) */
+
+ /* check ammount of configured memory
+ * (we need atleast bss start+bss size+stack size) */
movl $_i386boot_bss_start, %ecx /* BSS start */
- addl $_i386boot_bss_size, %ecx /* BSS size */
+ addl $_i386boot_bss_size, %ecx /* BSS size */
addl $CFG_STACK_SIZE, %ecx
- cmpl %ecx, %eax
+ cmpl %ecx, %eax
jae mem_ok
-
+
/* indicate (lack of) progress */
- movw $0x81, %ax
+ movw $0x81, %ax
movl $.progress0a, %ebp
jmp __show_boot_progress
-.progress0a:
+.progress0a:
jmp die
-mem_ok:
+mem_ok:
/* indicate progress */
- movw $0x02, %ax
+ movw $0x02, %ax
movl $.progress1, %ebp
jmp __show_boot_progress
-.progress1:
+.progress1:
/* create a stack after the bss */
- movl $_i386boot_bss_start, %eax
+ movl $_i386boot_bss_start, %eax
addl $_i386boot_bss_size, %eax
addl $CFG_STACK_SIZE, %eax
- movl %eax, %esp
-
+ movl %eax, %esp
+
pushl $0
popl %eax
cmpl $0, %eax
@@ -102,83 +102,83 @@ mem_ok:
no_stack:
/* indicate (lack of) progress */
- movw $0x82, %ax
+ movw $0x82, %ax
movl $.progress1a, %ebp
jmp __show_boot_progress
-.progress1a:
+.progress1a:
jmp die
-
-
-stack_ok:
+
+
+stack_ok:
/* indicate progress */
- movw $0x03, %ax
+ movw $0x03, %ax
movl $.progress2, %ebp
jmp __show_boot_progress
-.progress2:
+.progress2:
/* copy data section to ram, size must be 4-byte aligned */
movl $_i386boot_romdata_dest, %edi /* destination address */
- movl $_i386boot_romdata_start, %esi /* source address */
+ movl $_i386boot_romdata_start, %esi /* source address */
movl $_i386boot_romdata_size, %ecx /* number of bytes to copy */
movl %ecx, %eax
andl $3, %eax
jnz data_fail
-
+
shrl $2, %ecx /* copy 4 byte each time */
- cld
+ cld
cmpl $0, %ecx
- je data_ok
-data_segment:
- movsl
+ je data_ok
+data_segment:
+ movsl
loop data_segment
jmp data_ok
data_fail:
/* indicate (lack of) progress */
- movw $0x83, %ax
+ movw $0x83, %ax
movl $.progress2a, %ebp
jmp __show_boot_progress
-.progress2a:
+.progress2a:
jmp die
-data_ok:
+data_ok:
/* indicate progress */
- movw $0x04, %ax
+ movw $0x04, %ax
movl $.progress3, %ebp
jmp __show_boot_progress
-.progress3:
+.progress3:
/* clear bss section in ram, size must be 4-byte aligned */
movl $_i386boot_bss_start, %eax /* BSS start */
- movl $_i386boot_bss_size, %ecx /* BSS size */
+ movl $_i386boot_bss_size, %ecx /* BSS size */
movl %ecx, %eax
andl $3, %eax
jnz bss_fail
shrl $2, %ecx /* clear 4 byte each time */
- cld
+ cld
cmpl $0, %ecx
- je bss_ok
-bss:
+ je bss_ok
+bss:
movl $0, (%edi)
- add $4, %edi
+ add $4, %edi
loop bss
jmp bss_ok
bss_fail:
/* indicate (lack of) progress */
- movw $0x84, %ax
+ movw $0x84, %ax
movl $.progress3a, %ebp
jmp __show_boot_progress
-.progress3a:
+.progress3a:
jmp die
-bss_ok:
+bss_ok:
- wbinvd
+ wbinvd
/* indicate progress */
- movw $0x05, %ax
+ movw $0x05, %ax
movl $.progress4, %ebp
jmp __show_boot_progress
.progress4:
@@ -186,13 +186,11 @@ bss_ok:
call start_i386boot /* Enter, U-boot! */
/* indicate (lack of) progress */
- movw $0x85, %ax
+ movw $0x85, %ax
movl $.progress4a, %ebp
jmp __show_boot_progress
.progress4a:
die: hlt
jmp die
- hlt
-
-
+ hlt