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ARM: 6218/1: Versatile Express: add support for local timers on CA9X4 daughterboard

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This patch adds support for the Cortex-A9 local timers available when
using the CA9X4 daughterboard with the Versatile Express.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Will Deacon 2010-07-09 13:52:09 +01:00 committed by Russell King
parent e467e104bb
commit bde28b846e
3 changed files with 6 additions and 2 deletions
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5
arch/arm/Kconfig
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@ -1172,9 +1172,10 @@ config HOTPLUG_CPU
config LOCAL_TIMERS
bool "Use local timer interrupts"
depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
default y
select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_VEXPRESS || ARCH_OMAP4 || ARCH_U8500)
help
Enable support for local timers on SMP platforms, rather then the
legacy IPI broadcast method. Local timers allows the system

2
arch/arm/mach-vexpress/ct-ca9x4.c
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@ -16,6 +16,7 @@
#include <asm/hardware/gic.h>
#include <asm/mach-types.h>
#include <asm/pmu.h>
#include <asm/smp_twd.h>
#include <mach/clkdev.h>
#include <mach/ct-ca9x4.h>
@ -53,6 +54,7 @@ static struct map_desc ct_ca9x4_io_desc[] __initdata = {
static void __init ct_ca9x4_map_io(void)
{
twd_base = MMIO_P2V(A9_MPCORE_TWD);
v2m_map_io(ct_ca9x4_io_desc, ARRAY_SIZE(ct_ca9x4_io_desc));
}

1
arch/arm/mach-vexpress/include/mach/ct-ca9x4.h
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@ -28,6 +28,7 @@
#define A9_MPCORE_SCU (CT_CA9X4_MPIC + 0x0000)
#define A9_MPCORE_GIC_CPU (CT_CA9X4_MPIC + 0x0100)
#define A9_MPCORE_GIT (CT_CA9X4_MPIC + 0x0200)
#define A9_MPCORE_TWD (CT_CA9X4_MPIC + 0x0600)
#define A9_MPCORE_GIC_DIST (CT_CA9X4_MPIC + 0x1000)
/*