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linux-sg2042/arch/arm/mach-shmobile/headsmp.S

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ARM: mach-shmobile: SMP base support Add SMP base support for R-Mobile / SH-Mobile processors. This patch contains all base code to support CONFIG_SMP regardless of ARCH_SHMOBILE processor type. Both local timer and CPU hotplug are supported, but no processor specific code is included. At this point only the default behavior is in place, so a single core will always be used even though CONFIG_SMP is enabled on multicore systems. The SMP Kconfig entry for arch/arm/Kconfig is excluded from this patch to simplify merging. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-14 15:56:55 +08:00
/*
* SMP support for R-Mobile / SH-Mobile
*
* Copyright (C) 2010 Magnus Damm
* Copyright (C) 2010 Takashi Yoshii
*
* Based on vexpress, 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>
ARM: mach-shmobile: Clean up headsmp.S Use PAGE_OFFSET and PHYS_OFFSET for secondary_startup entry point as recommended by Russell King. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-20 19:04:50 +08:00
#include <asm/memory.h>
ARM: mach-shmobile: SMP base support Add SMP base support for R-Mobile / SH-Mobile processors. This patch contains all base code to support CONFIG_SMP regardless of ARCH_SHMOBILE processor type. Both local timer and CPU hotplug are supported, but no processor specific code is included. At this point only the default behavior is in place, so a single core will always be used even though CONFIG_SMP is enabled on multicore systems. The SMP Kconfig entry for arch/arm/Kconfig is excluded from this patch to simplify merging. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-14 15:56:55 +08:00
ARM: mach-shmobile: Fix headsmp.S code to use CPUINIT Convert the low level SMP assembly code for SH-Mobile ARM from using the INIT to the CPUINIT section. This unbreaks onlining of CPUs using the CPU hotplug interface: echo 1 > /sys/devices/system/cpu/cpu1/online Without this fix the reset vector code used by CPU hotplug will be freed as init section data and CPU cores cannot be brought online. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-12-28 15:44:06 +08:00
__CPUINIT
ARM: mach-shmobile: SMP base support Add SMP base support for R-Mobile / SH-Mobile processors. This patch contains all base code to support CONFIG_SMP regardless of ARCH_SHMOBILE processor type. Both local timer and CPU hotplug are supported, but no processor specific code is included. At this point only the default behavior is in place, so a single core will always be used even though CONFIG_SMP is enabled on multicore systems. The SMP Kconfig entry for arch/arm/Kconfig is excluded from this patch to simplify merging. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-14 15:56:55 +08:00
ARM / mach-shmobile: Invalidate caches when booting secondary cores Make sure L1 caches are invalidated when booting secondary cores. Needed to boot all mach-shmobile SMP systems that are using Cortex-A9 including sh73a0, r8a7779 and EMEV2. Thanks to imx and tegra guys for actual code. Signed-off-by: Magnus Damm <damm@opensource.se> Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-05-09 15:24:59 +08:00
ENTRY(shmobile_invalidate_start)
bl v7_invalidate_l1
b secondary_startup
ENDPROC(shmobile_invalidate_start)
ARM: mach-shmobile: SMP base support Add SMP base support for R-Mobile / SH-Mobile processors. This patch contains all base code to support CONFIG_SMP regardless of ARCH_SHMOBILE processor type. Both local timer and CPU hotplug are supported, but no processor specific code is included. At this point only the default behavior is in place, so a single core will always be used even though CONFIG_SMP is enabled on multicore systems. The SMP Kconfig entry for arch/arm/Kconfig is excluded from this patch to simplify merging. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-14 15:56:55 +08:00
/*
* Reset vector for secondary CPUs.
* This will be mapped at address 0 by SBAR register.
* We need _long_ jump to the physical address.
*/
ARM: shmobile: Force ARM mode to compile reset vector for secondary CPUs Instructions start from boot vector must be ARM mode. This patch specify ARM mode explicitly and use 'bx' instruction to be able to change to Thumb mode. Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-07-10 09:56:36 +08:00
.arm
ARM: mach-shmobile: SMP base support Add SMP base support for R-Mobile / SH-Mobile processors. This patch contains all base code to support CONFIG_SMP regardless of ARCH_SHMOBILE processor type. Both local timer and CPU hotplug are supported, but no processor specific code is included. At this point only the default behavior is in place, so a single core will always be used even though CONFIG_SMP is enabled on multicore systems. The SMP Kconfig entry for arch/arm/Kconfig is excluded from this patch to simplify merging. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-14 15:56:55 +08:00
.align 12
ARM: shmobile: Add SMP boot function and argument Add code for mach-shmobile to allow specifying boot function and argument. Will initially be used for SMP together with SCU but may in the future also be used for deep sleep resume. This patch removes one inline virtual to physical address conversion. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-06-10 17:19:36 +08:00
ENTRY(shmobile_boot_vector)
ldr r0, 2f
ARM: shmobile: Force ARM mode to compile reset vector for secondary CPUs Instructions start from boot vector must be ARM mode. This patch specify ARM mode explicitly and use 'bx' instruction to be able to change to Thumb mode. Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-07-10 09:56:36 +08:00
ldr r1, 1f
bx r1
ARM: shmobile: Add SMP boot function and argument Add code for mach-shmobile to allow specifying boot function and argument. Will initially be used for SMP together with SCU but may in the future also be used for deep sleep resume. This patch removes one inline virtual to physical address conversion. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-06-10 17:19:36 +08:00
ENDPROC(shmobile_boot_vector)
.globl shmobile_boot_fn
shmobile_boot_fn:
1: .space 4
.globl shmobile_boot_arg
shmobile_boot_arg:
2: .space 4