| /* 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) |
