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/*
* Copyright (c) 2020-2020, BLUETRUM Development Team
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "ab32vg1.h"
.global _start
.section .reset, "ax"
_start:
la tp, _tp
la gp, _gp
//load comm
la a0, __comm_vma
la a1, __comm_lma
la a2, __comm_size
call _memcpy
//load ram1
la a0, __ram1_vma
la a1, __ram1_lma
la a2, __ram1_size
call _memcpy
la a0, __irq_stack_start //Stack清成0x23
li a1, 0x23
la a2, __irq_stack_size
call rt_memset
la ra, __irq_stack
lui a5, 0x1
sw zero, -1920(a5)
sw zero, -1916(a5)
//clear bss
la a0, __bss_start
li a1, 0
la a2, __bss_size
call rt_memset
call cache_init
la a0, __comm_vma
sw a0, PICADR(zero)
call entry
la ra, __exception
jr ra
.section .vector, "ax"
.org 0x10
__exception:
li sp, 0x10600 //出错后，不破坏错误点的堆栈数据
jal exception_isr
1: j 1b
mret
.org 0x40
jal x0, low_prio_irq
.org 0x80
#define METHOD 1
#if METHOD == 1
addi sp, sp, -6*4
# lw a0, PICEN(zero)
lw a1, EPC(zero)
lw a2, EPICCON(zero)
# sw a0, 3*4(sp)
sw a1, 4*4(sp)
sw a2, 5*4(sp)
# andi a0, a0, 1
# sw a0, PICEN(zero)
li a2, 0
sw a2, EPICCON(zero)
la a0, 0f
sw a0, EPC(zero)
j isr_cache
0:
sw a0, 0(sp)
sw a1, 4(sp)
sw a2, 8(sp)
# lw a0, 3*4(sp)
lw a1, 4*4(sp)
lw a2, 5*4(sp)
# sw a0, PICEN(zero)
sw a1, EPC(zero)
sw a2, EPICCON(zero)
lw a0, 0(sp)
lw a1, 4(sp)
lw a2, 8(sp)
addi sp, sp, 6*4
mret
#endif
.org 0x1e0
1: j 1b
nop
mret
.global cpu_irq_comm
cpu_irq_comm:
la a5, __irq_stack
mv sp, a5
j cpu_irq_comm_do
ret
.global _tp
.set _tp, 0x84800
.set _memcpy, 0x84044
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