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 = physical &g_diag_reg 20 ldr r0, [r1] 21 mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register 22 .endm 23 24 ENTRY(v7_secondary_startup) 25 ARM_BE8(setend be) @ go BE8 if entered LE 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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