38 lines
746 B
ArmAsm
38 lines
746 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright 2011 Freescale Semiconductor, Inc.
|
|
* Copyright 2011 Linaro Ltd.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <linux/init.h>
|
|
#include <asm/assembler.h>
|
|
|
|
.arch armv7-a
|
|
|
|
diag_reg_offset:
|
|
.word g_diag_reg - .
|
|
|
|
.macro set_diag_reg
|
|
adr r0, diag_reg_offset
|
|
ldr r1, [r0]
|
|
add r1, r1, r0 @ r1 = physical &g_diag_reg
|
|
ldr r0, [r1]
|
|
mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register
|
|
.endm
|
|
|
|
ENTRY(v7_secondary_startup)
|
|
ARM_BE8(setend be) @ go BE8 if entered LE
|
|
mrc p15, 0, r0, c0, c0, 0
|
|
lsl r0, r0, #16
|
|
lsr r0, r0, #20
|
|
/* 0xc07 is cortex A7's ID */
|
|
mov r1, #0xc00
|
|
orr r1, #0x7
|
|
cmp r0, r1
|
|
beq secondary_startup
|
|
|
|
set_diag_reg
|
|
b secondary_startup
|
|
ENDPROC(v7_secondary_startup)
|