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removed unused parts of boot.S and changed ordering in boot process

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Anton Lydike 2021-08-17 09:13:40 +02:00
parent 06f8cfd279
commit 1b0ee53e4e
1 changed files with 4 additions and 4 deletions
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8
kinclude/boot.S
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@ -16,10 +16,6 @@ stack_top:
.global _start
_start:
// setup a0 to hold |trap tbl addr|mode|
// len:| 30 | 2 |
la a0, trap_vector
csrrw zero, CSR_MTVEC, a0 // write a0 into mtvec csr entry
// enable interrupts in mstatus
// this is the setting loaded:
// [07] MPIE = 1 - we want to enable interrupts with mret
@ -28,6 +24,10 @@ _start:
// all other bits should be zero
li a0, 0x80
csrrw zero, CSR_MSTATUS, a0 // write to mstatus
// setup a0 to hold |trap tbl addr|mode|
// len:| 30 | 2 |
la a0, trap_vector
csrrw zero, CSR_MTVEC, a0 // write a0 into mtvec csr entry
// write
.option push
.option norelax