mirror of
git://projects.qi-hardware.com/xburst-tools.git
synced 2024-11-22 06:42:50 +02:00
delete something we don't need
This commit is contained in:
xiangfu
parent
c382c5066c
commit
eab58ff419
@ -53,3 +53,8 @@ int blink_led()
|
||||
return 0;
|
||||
}
|
||||
|
||||
int start_armboot()
|
||||
{
|
||||
blink_led();
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -19,53 +19,9 @@
|
||||
* MA 02111-1307 USA
|
||||
*/
|
||||
#include <neo_gta02.h>
|
||||
|
||||
.globl _start
|
||||
_start: b start_code
|
||||
ldr pc, _undefined_instruction
|
||||
ldr pc, _software_interrupt
|
||||
ldr pc, _prefetch_abort
|
||||
ldr pc, _data_abort
|
||||
ldr pc, _not_used
|
||||
ldr pc, _irq
|
||||
ldr pc, _fiq
|
||||
|
||||
_undefined_instruction: .word undefined_instruction
|
||||
_software_interrupt: .word software_interrupt
|
||||
_prefetch_abort: .word prefetch_abort
|
||||
_data_abort: .word data_abort
|
||||
_not_used: .word not_used
|
||||
_irq: .word irq
|
||||
_fiq: .word fiq
|
||||
|
||||
.balignl 16,0xdeadbeef
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* Startup Code (called from the ARM reset exception vector)
|
||||
*
|
||||
* do important init only if we don't start from memory!
|
||||
* relocate armboot to ram
|
||||
* setup stack
|
||||
*
|
||||
*************************************************************************
|
||||
*/
|
||||
|
||||
.globl preboot_override
|
||||
preboot_override:
|
||||
.word 0
|
||||
|
||||
/* Must follow preboot_override , so we get a well-known address ! */
|
||||
.globl env_override
|
||||
env_override:
|
||||
.word 0
|
||||
|
||||
/* we want to be able to start kboot directly from within NAND flash */
|
||||
.globl booted_from_nand
|
||||
booted_from_nand:
|
||||
.word 0
|
||||
_booted_from_nand:
|
||||
.word booted_from_nand
|
||||
|
||||
|
||||
_TEXT_BASE:
|
||||
.word TEXT_BASE
|
||||
@ -85,17 +41,6 @@ _bss_start:
|
||||
_bss_end:
|
||||
.word _end
|
||||
|
||||
/* IRQ stack memory (calculated at run-time) */
|
||||
.globl IRQ_STACK_START
|
||||
IRQ_STACK_START:
|
||||
.word 0x0badc0de
|
||||
|
||||
/* IRQ stack memory (calculated at run-time) */
|
||||
.globl FIQ_STACK_START
|
||||
FIQ_STACK_START:
|
||||
.word 0x0badc0de
|
||||
|
||||
|
||||
start_code:
|
||||
/*
|
||||
* set the cpu to SVC32 mode
|
||||
@ -192,11 +137,6 @@ start_code:
|
||||
str r1, [r0, #0x28]
|
||||
|
||||
bl cpu_init_crit
|
||||
/*
|
||||
* Size of malloc() pool
|
||||
*/
|
||||
#define CFG_ENV_SIZE 0x40000 /* 128k Total Size of Environment Sector */
|
||||
#define CFG_MALLOC_LEN (CFG_ENV_SIZE + 400*1024)
|
||||
/* >> CFG_VIDEO_LOGO_MAX_SIZE */
|
||||
#define CFG_GBL_DATA_SIZE 128 /* size in bytes reserved for initial data */
|
||||
#define CONFIG_STACKSIZE (128*1024) /* regular stack */
|
||||
@ -204,7 +144,6 @@ start_code:
|
||||
#define CONFIG_STACKSIZE_FIQ (4*1024) /* FIQ stack */
|
||||
stack_setup:
|
||||
ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
|
||||
sub r0, r0, #CFG_MALLOC_LEN /* malloc area */
|
||||
sub r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo */
|
||||
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
|
||||
sub sp, r0, #12 /* leave 3 words for abort-stack */
|
||||
@ -224,7 +163,7 @@ clbss_l:
|
||||
ldr pc, _start_armboot
|
||||
|
||||
_start_armboot:
|
||||
.word blink_led
|
||||
.word start_armboot
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
@ -267,151 +206,3 @@ cpu_init_crit:
|
||||
mov lr, ip
|
||||
mov pc, lr
|
||||
|
||||
/*
|
||||
*************************************************************************
|
||||
*
|
||||
* Interrupt handling
|
||||
*
|
||||
*************************************************************************
|
||||
*/
|
||||
|
||||
@
|
||||
@ IRQ stack frame.
|
||||
@
|
||||
#define S_FRAME_SIZE 72
|
||||
|
||||
#define S_OLD_R0 68
|
||||
#define S_PSR 64
|
||||
#define S_PC 60
|
||||
#define S_LR 56
|
||||
#define S_SP 52
|
||||
|
||||
#define S_IP 48
|
||||
#define S_FP 44
|
||||
#define S_R10 40
|
||||
#define S_R9 36
|
||||
#define S_R8 32
|
||||
#define S_R7 28
|
||||
#define S_R6 24
|
||||
#define S_R5 20
|
||||
#define S_R4 16
|
||||
#define S_R3 12
|
||||
#define S_R2 8
|
||||
#define S_R1 4
|
||||
#define S_R0 0
|
||||
|
||||
#define MODE_SVC 0x13
|
||||
#define I_BIT 0x80
|
||||
|
||||
/*
|
||||
* use bad_save_user_regs for abort/prefetch/undef/swi ...
|
||||
* use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
|
||||
*/
|
||||
|
||||
.macro bad_save_user_regs
|
||||
sub sp, sp, #S_FRAME_SIZE
|
||||
stmia sp, {r0 - r12} @ Calling r0-r12
|
||||
ldr r2, _armboot_start
|
||||
sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
|
||||
sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
|
||||
ldmia r2, {r2 - r3} @ get pc, cpsr
|
||||
add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
|
||||
|
||||
add r5, sp, #S_SP
|
||||
mov r1, lr
|
||||
stmia r5, {r0 - r3} @ save sp_SVC, lr_SVC, pc, cpsr
|
||||
mov r0, sp
|
||||
.endm
|
||||
|
||||
.macro irq_save_user_regs
|
||||
sub sp, sp, #S_FRAME_SIZE
|
||||
stmia sp, {r0 - r12} @ Calling r0-r12
|
||||
add r7, sp, #S_PC
|
||||
stmdb r7, {sp, lr}^ @ Calling SP, LR
|
||||
str lr, [r7, #0] @ Save calling PC
|
||||
mrs r6, spsr
|
||||
str r6, [r7, #4] @ Save CPSR
|
||||
str r0, [r7, #8] @ Save OLD_R0
|
||||
mov r0, sp
|
||||
.endm
|
||||
|
||||
.macro irq_restore_user_regs
|
||||
ldmia sp, {r0 - lr}^ @ Calling r0 - lr
|
||||
mov r0, r0
|
||||
ldr lr, [sp, #S_PC] @ Get PC
|
||||
add sp, sp, #S_FRAME_SIZE
|
||||
subs pc, lr, #4 @ return & move spsr_svc into cpsr
|
||||
.endm
|
||||
|
||||
.macro get_bad_stack
|
||||
ldr r13, _armboot_start @ setup our mode stack
|
||||
sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
|
||||
sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
|
||||
|
||||
str lr, [r13] @ save caller lr / spsr
|
||||
mrs lr, spsr
|
||||
str lr, [r13, #4]
|
||||
|
||||
mov r13, #MODE_SVC @ prepare SVC-Mode
|
||||
@ msr spsr_c, r13
|
||||
msr spsr, r13
|
||||
mov lr, pc
|
||||
movs pc, lr
|
||||
.endm
|
||||
|
||||
.macro get_irq_stack @ setup IRQ stack
|
||||
ldr sp, IRQ_STACK_START
|
||||
.endm
|
||||
|
||||
.macro get_fiq_stack @ setup FIQ stack
|
||||
ldr sp, FIQ_STACK_START
|
||||
.endm
|
||||
|
||||
/*
|
||||
* exception handlers
|
||||
*/
|
||||
.align 5
|
||||
undefined_instruction:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
//bl do_undefined_instruction
|
||||
|
||||
.align 5
|
||||
software_interrupt:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
//bl do_software_interrupt
|
||||
|
||||
.align 5
|
||||
prefetch_abort:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
//bl do_prefetch_abort
|
||||
|
||||
.align 5
|
||||
data_abort:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
//bl do_data_abort
|
||||
|
||||
.align 5
|
||||
not_used:
|
||||
get_bad_stack
|
||||
bad_save_user_regs
|
||||
//bl do_not_used
|
||||
|
||||
/* CONFIG_USE_IRQ*/
|
||||
.align 5
|
||||
irq:
|
||||
get_irq_stack
|
||||
irq_save_user_regs
|
||||
//bl do_irq
|
||||
irq_restore_user_regs
|
||||
|
||||
.align 5
|
||||
fiq:
|
||||
get_fiq_stack
|
||||
/* someone ought to write a more effiction fiq_save_user_regs */
|
||||
irq_save_user_regs
|
||||
//bl do_fiq
|
||||
irq_restore_user_regs
|
||||
|
||||
Loading…
Reference in New Issue
Block a user