109 lines
2.1 KiB
ArmAsm
109 lines
2.1 KiB
ArmAsm
/*
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* Copyright (c) 2020-2020, BLUETRUM Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "ab32vg1.h"
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.set _memcpy, 0x84044
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.global _start
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.section .reset, "ax"
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_start:
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la tp, _tp
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la gp, _gp
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//load comm
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la a0, __comm_vma
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la a1, __comm_lma
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la a2, __comm_size
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call _memcpy
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//load ram1
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la a0, __ram1_vma
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la a1, __ram1_lma
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la a2, __ram1_size
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call _memcpy
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la a0, __irq_stack_start //Stack清成0x23
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li a1, 0x23
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la a2, __irq_stack_size
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call rt_memset
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la ra, __irq_stack
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lui a5, 0x1
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sw zero, -1920(a5)
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sw zero, -1916(a5)
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//clear bss
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la a0, __bss_start
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li a1, 0
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la a2, __bss_size
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call rt_memset
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call cache_init
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la a0, __comm_vma
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sw a0, PICADR(zero)
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call entry
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la ra, __exception
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jr ra
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.section .vector, "ax"
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.org 0x10
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__exception:
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li sp, 0x10600 //出错后，不破坏错误点的堆栈数据
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jal exception_isr
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1: j 1b
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mret
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.org 0x40
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jal x0, low_prio_irq
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.org 0x80
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#define METHOD 1
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#if METHOD == 1
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addi sp, sp, -6*4
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# lw a0, PICEN(zero)
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lw a1, EPC(zero)
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lw a2, EPICCON(zero)
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# sw a0, 3*4(sp)
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sw a1, 4*4(sp)
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sw a2, 5*4(sp)
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# andi a0, a0, 1
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# sw a0, PICEN(zero)
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li a2, 0
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sw a2, EPICCON(zero)
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la a0, 0f
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sw a0, EPC(zero)
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j isr_cache
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0:
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sw a0, 0(sp)
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sw a1, 4(sp)
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sw a2, 8(sp)
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# lw a0, 3*4(sp)
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lw a1, 4*4(sp)
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lw a2, 5*4(sp)
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# sw a0, PICEN(zero)
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sw a1, EPC(zero)
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sw a2, EPICCON(zero)
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lw a0, 0(sp)
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lw a1, 4(sp)
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lw a2, 8(sp)
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addi sp, sp, 6*4
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mret
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#endif
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.global cpu_irq_comm
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cpu_irq_comm:
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la a5, __irq_stack
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mv sp, a5
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j cpu_irq_comm_do
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ret
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.global _tp
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.set _tp, 0x84800
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