projects / mirror_ubuntu-eoan-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 59ac59f6 | 2 | /* |
| 0462b447 | 3 | * linux/arch/arm/plat-versatile/headsmp.S |
| 59ac59f6 RK |
4 | * |
| 5 | * Copyright (c) 2003 ARM Limited | |
| 6 | * All Rights Reserved | |
| 59ac59f6 RK |
7 | */ |
| 8 | #include <linux/linkage.h> | |
| 9 | #include <linux/init.h> | |
| 98dec91f | 10 | #include <asm/assembler.h> |
| 59ac59f6 | 11 | |
| 59ac59f6 | 12 | /* |
| 0462b447 RK |
13 | * Realview/Versatile Express specific entry point for secondary CPUs. |
| 14 | * This provides a "holding pen" into which all secondary cores are held | |
| 59ac59f6 RK |
15 | * until we're ready for them to initialise. |
| 16 | */ | |
| 0462b447 | 17 | ENTRY(versatile_secondary_startup) |
| 98dec91f | 18 | ARM_BE8(setend be) |
| 59ac59f6 | 19 | mrc p15, 0, r0, c0, c0, 5 |
| 1585defb | 20 | bic r0, #0xff000000 |
| 59ac59f6 RK |
21 | adr r4, 1f |
| 22 | ldmia r4, {r5, r6} | |
| 23 | sub r4, r4, r5 | |
| 24 | add r6, r6, r4 | |
| 25 | pen: ldr r7, [r6] | |
| 26 | cmp r7, r0 | |
| 27 | bne pen | |
| 28 | ||
| 29 | /* | |
| 30 | * we've been released from the holding pen: secondary_stack | |
| 31 | * should now contain the SVC stack for this core | |
| 32 | */ | |
| 33 | b secondary_startup | |
| 34 | ||
| 618d9c8f | 35 | .align |
| 59ac59f6 | 36 | 1: .long . |
| d9b778e7 | 37 | .long versatile_cpu_release |
| 764a579f | 38 | ENDPROC(versatile_secondary_startup) |