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
|
#include <linux/linkage.h>
#include <init.h>
#include <asm/system.h>
.section ".text_bare_init_","ax"
ENTRY(arm_cpu_lowlevel_init)
adr x0, vectors
mrs x1, CurrentEL
cmp x1, #0xC /* Check EL3 state */
b.eq 1f
cmp x1, #0x8 /* Check EL2 state */
b.eq 2f
cmp x1, #0x4 /* Check EL1 state */
b.eq 3f
1:
msr vbar_el3, x0
mov x0, #1 /* Non-Secure EL0/1 */
orr x0, x0, #(1 << 10) /* 64-bit EL2 */
msr scr_el3, x0
msr cptr_el3, xzr
b done
2:
msr vbar_el2, x0
mov x0, #0x33ff /* Enable FP/SIMD */
msr cptr_el2, x0
b done
3:
msr vbar_el1, x0
mov x0, #(3 << 20) /* Enable FP/SIMD */
msr cpacr_el1, x0
b done
done:
ret
ENDPROC(arm_cpu_lowlevel_init)
|
