diff options
author | Kukjin Kim <kgene.kim@samsung.com> | 2011-02-14 16:33:10 +0900 |
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committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-02-22 13:51:14 +0900 |
commit | 7d30e8b3815f804139271dfc31962ab74ce89650 (patch) | |
tree | 711d4830705e0147cb8184ca1a8e6e3c97bc02fe /arch/arm/mach-exynos4/headsmp.S | |
parent | f5412be599602124d2bdd49947b231dd77c0bf99 (diff) | |
download | op-kernel-dev-7d30e8b3815f804139271dfc31962ab74ce89650.zip op-kernel-dev-7d30e8b3815f804139271dfc31962ab74ce89650.tar.gz |
ARM: EXYNOS4: Add EXYNOS4 CPU initialization support
This patch adds EXYNOS4 CPU support files in mach-exynos4,
and basically they are moved from mach-s5pv310 so that it
can support Samsung's new CPU name, EXYNOS4.
The EXYNOS4 ingegrates a ARM Cortex A9 multi-core.
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/mach-exynos4/headsmp.S')
-rw-r--r-- | arch/arm/mach-exynos4/headsmp.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos4/headsmp.S b/arch/arm/mach-exynos4/headsmp.S new file mode 100644 index 0000000..6c6cfc5 --- /dev/null +++ b/arch/arm/mach-exynos4/headsmp.S @@ -0,0 +1,41 @@ +/* + * linux/arch/arm/mach-exynos4/headsmp.S + * + * Cloned from linux/arch/arm/mach-realview/headsmp.S + * + * Copyright (c) 2003 ARM Limited + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/linkage.h> +#include <linux/init.h> + + __INIT + +/* + * exynos4 specific entry point for secondary CPUs. This provides + * a "holding pen" into which all secondary cores are held until we're + * ready for them to initialise. + */ +ENTRY(exynos4_secondary_startup) + mrc p15, 0, r0, c0, c0, 5 + and r0, r0, #15 + adr r4, 1f + ldmia r4, {r5, r6} + sub r4, r4, r5 + add r6, r6, r4 +pen: ldr r7, [r6] + cmp r7, r0 + bne pen + + /* + * we've been released from the holding pen: secondary_stack + * should now contain the SVC stack for this core + */ + b secondary_startup + +1: .long . + .long pen_release |