diff options
Diffstat (limited to 'arch/arm/mach-imx/headsmp.S')
| -rw-r--r-- | arch/arm/mach-imx/headsmp.S | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/headsmp.S b/arch/arm/mach-imx/headsmp.S new file mode 100644 index 000000000..fcba58be8 --- /dev/null +++ b/arch/arm/mach-imx/headsmp.S @@ -0,0 +1,35 @@ +/* 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> + +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) |