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
|
.section .text.start
.extern main
.extern CONSOLE_STRICT_FLUSH
.global _start
.type _start, STT_FUNC
_start:
# Have harts other than 0 spin until hart0 wakes them up.
csrr a0, mhartid
c.bnez a0, wait_for_hart0
# Set up console_strict_flush.
la t0, console_strict_flush
la t1, CONSOLE_STRICT_FLUSH
sd t0, (t1)
# Set up hart0's stack.
la sp, hart0_initial_stack_top
# Call hart0_boot with the address of the DeviceTree.
c.mv a0, a1
call hart0_boot
# Fall through to a spin loop.
.size _start, . - _start
.type halt, STT_FUNC
halt:
j halt
.size halt, . - halt
.section .text
.type console_strict_flush, STT_FUNC
console_strict_flush:
li t0, 0x10000000
1:
c.beqz a1, 2f
lb t1, (a0)
sb t1, (t0)
addi a0, a0, 1
addi a1, a1, -1
j 1b
2:
ret
.size console_strict_flush, . - console_strict_flush
.section .text
.type wait_for_hart0, STT_FUNC
wait_for_hart0:
# TODO
j halt
.size wait_for_hart0, . - wait_for_hart0
|
