83 lines
1.1 KiB
ArmAsm
83 lines
1.1 KiB
ArmAsm
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/*
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* Copyright (c) Hunan Goke,Chengdu Goke,Shandong Goke. 2021. All rights reserved.
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*/
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.section .text
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.type _start, %function
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.globl _start
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_start:
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push {r0 - r10}
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b flying
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. = 0x10
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_CMD_TEXT_BASE:
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.word CMD_TEXT_BASE
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_arm_start:
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.word _start
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_flying:
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.word flying
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_STACK_POINT:
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.word STACK_POINT
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.globl _bss_start
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_bss_start: .word __bss_start
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.globl _bss_end
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_bss_end: .word _end
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_real_start:
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.word real_start
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flying:
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mov r2, pc
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sub r2, r2, #8
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ldr r1, _arm_start
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ldr r0, _flying
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sub r1, r0, r1
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sub r0, r2, r1
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ldr r1, _CMD_TEXT_BASE
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cmp r0, r1
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beq real_start
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/* need relocation */
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ldr r2, _arm_start
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ldr r3, _bss_start
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sub r2, r3, r2
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add r2, r0, r2
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self_move:
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ldmia r0!, {r3 - r10}
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stmia r1!, {r3 - r10}
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cmp r0, r2
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ble self_move
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ldr pc, _real_start
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real_start:
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ldr r0, _bss_start
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ldr r1, _bss_end
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mov r2, #0x00000000
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clear_bss_loop:
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str r2, [r0]
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cmp r0, r1
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add r0, r0, #4
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bne clear_bss_loop
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ldr r4, =_lr
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str lr, [r4]
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pop {r0 - r10}
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ldr lr, =_sp
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str sp, [lr]
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ldr sp, _STACK_POINT
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bl ddr_training_cmd_entry
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ldr lr, =_sp
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ldr sp, [lr]
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ldr lr, =_lr
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ldr pc, [lr]
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.section .data
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_lr: .word 0
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_sp: .word 0
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