1 /* SPDX-License-Identifier: GPL-2.0-or-later *
2 /*
3 * Copyright 2011 Freescale Semiconductor, Inc
4 * Copyright 2011 Linaro Ltd.
5 */
6
7 #include <linux/linkage.h>
8 #include <linux/init.h>
9 #include <asm/assembler.h>
10
11 .arch armv7-a
12
13 diag_reg_offset:
14 .word g_diag_reg - .
15
16 .macro set_diag_reg
17 adr r0, diag_reg_offset
18 ldr r1, [r0]
19 add r1, r1, r0 @ r1 =
20 ldr r0, [r1]
21 mcr p15, 0, r0, c15, c0, 1 @ writ
22 .endm
23
24 ENTRY(v7_secondary_startup)
25 ARM_BE8(setend be) @ go B
26 mrc p15, 0, r0, c0, c0, 0
27 lsl r0, r0, #16
28 lsr r0, r0, #20
29 /* 0xc07 is cortex A7's ID */
30 mov r1, #0xc00
31 orr r1, #0x7
32 cmp r0, r1
33 beq secondary_startup
34
35 set_diag_reg
36 b secondary_startup
37 ENDPROC(v7_secondary_startup)
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