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