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

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
View File

@ -1172,9 +1172,10 @@ config HOTPLUG_CPU
config LOCAL_TIMERS config LOCAL_TIMERS
bool "Use local timer interrupts" bool "Use local timer interrupts"
depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \ 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 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 help
Enable support for local timers on SMP platforms, rather then the Enable support for local timers on SMP platforms, rather then the
legacy IPI broadcast method. Local timers allows the system legacy IPI broadcast method. Local timers allows the system

2
arch/arm/mach-vexpress/ct-ca9x4.c
View File

@ -16,6 +16,7 @@
#include <asm/hardware/gic.h> #include <asm/hardware/gic.h>
#include <asm/mach-types.h> #include <asm/mach-types.h>
#include <asm/pmu.h> #include <asm/pmu.h>
#include <asm/smp_twd.h>
#include <mach/clkdev.h> #include <mach/clkdev.h>
#include <mach/ct-ca9x4.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) 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)); v2m_map_io(ct_ca9x4_io_desc, ARRAY_SIZE(ct_ca9x4_io_desc));
} }

1
arch/arm/mach-vexpress/include/mach/ct-ca9x4.h
View File

@ -28,6 +28,7 @@
#define A9_MPCORE_SCU (CT_CA9X4_MPIC + 0x0000) #define A9_MPCORE_SCU (CT_CA9X4_MPIC + 0x0000)
#define A9_MPCORE_GIC_CPU (CT_CA9X4_MPIC + 0x0100) #define A9_MPCORE_GIC_CPU (CT_CA9X4_MPIC + 0x0100)
#define A9_MPCORE_GIT (CT_CA9X4_MPIC + 0x0200) #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) #define A9_MPCORE_GIC_DIST (CT_CA9X4_MPIC + 0x1000)
/* /*