File size: 1,917 Bytes
cd886b3 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | .section .asm, "ax"
.global _start
.global _exit_
#define STORE_REGS(reg) sw x##reg, ((reg*4)+0x10)(x0)
#define LOAD_REGS(reg) lw x##reg, ((reg*4)+0x10)(x0)
.align 4
j _init
interrupt:
.word _start
reason_code:
.word 0x00
reg_store:
.fill 32, 4
_exit_:
.word 0x00
back:
.word 1
_start:
STORE_REGS(1)
STORE_REGS(2)
STORE_REGS(3)
STORE_REGS(4)
STORE_REGS(5)
STORE_REGS(6)
STORE_REGS(7)
STORE_REGS(8)
STORE_REGS(9)
STORE_REGS(10)
STORE_REGS(11)
STORE_REGS(12)
STORE_REGS(13)
STORE_REGS(14)
STORE_REGS(15)
STORE_REGS(16)
STORE_REGS(17)
STORE_REGS(18)
STORE_REGS(19)
STORE_REGS(20)
STORE_REGS(21)
STORE_REGS(22)
STORE_REGS(23)
STORE_REGS(24)
STORE_REGS(25)
STORE_REGS(26)
STORE_REGS(27)
STORE_REGS(28)
STORE_REGS(29)
STORE_REGS(30)
STORE_REGS(31)
la sp, _sstack
addi sp,sp,-16
jal ra, entry
LOAD_REGS(1)
LOAD_REGS(2)
LOAD_REGS(3)
LOAD_REGS(4)
LOAD_REGS(5)
LOAD_REGS(6)
LOAD_REGS(7)
LOAD_REGS(8)
LOAD_REGS(9)
LOAD_REGS(10)
LOAD_REGS(11)
LOAD_REGS(12)
LOAD_REGS(13)
LOAD_REGS(14)
LOAD_REGS(15)
LOAD_REGS(16)
LOAD_REGS(17)
LOAD_REGS(18)
LOAD_REGS(19)
LOAD_REGS(20)
LOAD_REGS(21)
LOAD_REGS(22)
LOAD_REGS(23)
LOAD_REGS(24)
LOAD_REGS(25)
LOAD_REGS(26)
LOAD_REGS(27)
LOAD_REGS(28)
LOAD_REGS(29)
LOAD_REGS(30)
LOAD_REGS(31)
j back
_init:
la x5, _start
sw x5, 4(x0)
li x1, 0x1800
csrrw x0, mstatus, x1
la x11, 0x10000000
li x1, 0x80
sb x1, 3(x11)
li x1, 2
sb x1, 0(x11)
li x1, 3
sb x1, 3(x11)
la sp, _sstack
addi sp,sp,-16
jal ra, _boot_
mv x1,x0
mv x2,x0
mv x3,x0
mv x4,x0
mv x5,x0
mv x6,x0
mv x7,x0
mv x8,x0
mv x9,x0
mv x10,x0
mv x11,x0
mv x12,x0
mv x13,x0
mv x14,x0
mv x15,x0
mv x16,x0
mv x17,x0
mv x18,x0
mv x19,x0
mv x20,x0
mv x21,x0
mv x22,x0
mv x23,x0
mv x24,x0
mv x25,x0
mv x26,x0
mv x27,x0
mv x28,x0
mv x29,x0
mv x30,x0
mv x31,x0
la x11,0x81000000
la x1, 0x80000000
sw x1, 0x4(x0)
mv x1, x0
j back
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