[RFC PATCH 02/12] ARM: local timers: switch realview to standalone smp_twd
Marc Zyngier
marc.zyngier at arm.com
Tue Aug 9 06:46:44 EDT 2011
Convert the SMP RealView platforms to the standalone version
of smp_twd.c. Since the timer calibration code requires another
timer to be up and running, the actual initialisation is left
to the late_timer_init hook.
Tested on EB-11MP.
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
---
arch/arm/mach-realview/Kconfig | 3 ++
arch/arm/mach-realview/realview_eb.c | 33 ++++++++++++++++++++++++++---
arch/arm/mach-realview/realview_pb11mp.c | 31 ++++++++++++++++++++++++---
arch/arm/mach-realview/realview_pbx.c | 30 ++++++++++++++++++++++++--
4 files changed, 86 insertions(+), 11 deletions(-)
diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig
index dba6d0c..135a7ea 100644
--- a/arch/arm/mach-realview/Kconfig
+++ b/arch/arm/mach-realview/Kconfig
@@ -4,6 +4,7 @@ menu "RealView platform type"
config MACH_REALVIEW_EB
bool "Support RealView(R) Emulation Baseboard"
select ARM_GIC
+ select ARM_SMP_TWD if SMP
help
Include support for the ARM(R) RealView(R) Emulation Baseboard
platform.
@@ -40,6 +41,7 @@ config MACH_REALVIEW_PB11MP
select ARM_GIC
select HAVE_PATA_PLATFORM
select ARCH_HAS_BARRIERS if SMP
+ select ARM_SMP_TWD if SMP
help
Include support for the ARM(R) RealView(R) Platform Baseboard for
the ARM11MPCore. This platform has an on-board ARM11MPCore and has
@@ -80,6 +82,7 @@ config MACH_REALVIEW_PBX
select HAVE_PATA_PLATFORM
select ARCH_SPARSEMEM_ENABLE if CPU_V7 && !REALVIEW_HIGH_PHYS_OFFSET
select ZONE_DMA if SPARSEMEM
+ select ARM_SMP_TWD if SMP
help
Include support for the ARM(R) RealView(R) Platform Baseboard
Explore.
diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
index 7a4e3b1..420cc1c 100644
--- a/arch/arm/mach-realview/realview_eb.c
+++ b/arch/arm/mach-realview/realview_eb.c
@@ -36,7 +36,7 @@
#include <asm/pgtable.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>
-#include <asm/localtimer.h>
+#include <asm/smp_twd.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@@ -391,6 +391,33 @@ static void realview_eb11mp_fixup(void)
realview_eb_isp1761_resources[1].end = IRQ_EB11MP_USB;
}
+#ifdef CONFIG_ARM_SMP_TWD
+static struct resource twd_resources[] __initdata = {
+ {
+ .start = REALVIEW_EB11MP_TWD_BASE,
+ .end = REALVIEW_EB11MP_TWD_BASE + 0xff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_LOCALTIMER,
+ .end = IRQ_LOCALTIMER,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static void __init realview_eb_twd_init(void)
+{
+ if (core_tile_eb11mp() || core_tile_a9mp()) {
+ int err = twd_timer_register(twd_resources,
+ ARRAY_SIZE(twd_resources));
+ if (err)
+ pr_err("twd_timer_register failed %d\n", err);
+ }
+}
+#else
+#define realview_eb_twd_init NULL
+#endif
+
static void __init realview_eb_timer_init(void)
{
unsigned int timer_irq;
@@ -401,9 +428,7 @@ static void __init realview_eb_timer_init(void)
timer3_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE) + 0x20;
if (core_tile_eb11mp() || core_tile_a9mp()) {
-#ifdef CONFIG_LOCAL_TIMERS
- twd_base = __io_address(REALVIEW_EB11MP_TWD_BASE);
-#endif
+ late_time_init = realview_eb_twd_init;
timer_irq = IRQ_EB11MP_TIMER0_1;
} else
timer_irq = IRQ_EB_TIMER0_1;
diff --git a/arch/arm/mach-realview/realview_pb11mp.c b/arch/arm/mach-realview/realview_pb11mp.c
index b43644b..8185022 100644
--- a/arch/arm/mach-realview/realview_pb11mp.c
+++ b/arch/arm/mach-realview/realview_pb11mp.c
@@ -36,7 +36,7 @@
#include <asm/pgtable.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>
-#include <asm/localtimer.h>
+#include <asm/smp_twd.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
@@ -298,6 +298,31 @@ static void __init gic_init_irq(void)
gic_cascade_irq(1, IRQ_TC11MP_PB_IRQ1);
}
+#ifdef CONFIG_ARM_SMP_TWD
+static struct resource realview_pb11mp_twd_resources[] __initdata = {
+ {
+ .start = REALVIEW_TC11MP_TWD_BASE,
+ .end = REALVIEW_TC11MP_TWD_BASE + 0x10,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_LOCALTIMER,
+ .end = IRQ_LOCALTIMER,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static void __init realview_pb11mp_twd_init(void)
+{
+ int err = twd_timer_register(realview_pb11mp_twd_resources,
+ ARRAY_SIZE(realview_pb11mp_twd_resources));
+ if (err)
+ pr_err("twd_timer_register failed %d\n", err);
+}
+#else
+#define realview_pb11mp_twd_init NULL
+#endif
+
static void __init realview_pb11mp_timer_init(void)
{
timer0_va_base = __io_address(REALVIEW_PB11MP_TIMER0_1_BASE);
@@ -305,10 +330,8 @@ static void __init realview_pb11mp_timer_init(void)
timer2_va_base = __io_address(REALVIEW_PB11MP_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_PB11MP_TIMER2_3_BASE) + 0x20;
-#ifdef CONFIG_LOCAL_TIMERS
- twd_base = __io_address(REALVIEW_TC11MP_TWD_BASE);
-#endif
realview_timer_init(IRQ_TC11MP_TIMER0_1);
+ late_time_init = realview_pb11mp_twd_init;
}
static struct sys_timer realview_pb11mp_timer = {
diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
index 363b0ab..bbe4534 100644
--- a/arch/arm/mach-realview/realview_pbx.c
+++ b/arch/arm/mach-realview/realview_pbx.c
@@ -301,6 +301,31 @@ static void __init gic_init_irq(void)
}
}
+#ifdef CONFIG_ARM_SMP_TWD
+static struct resource realview_pbx_twd_resources[] __initdata = {
+ {
+ .start = REALVIEW_PBX_TILE_TWD_BASE,
+ .end = REALVIEW_PBX_TILE_TWD_BASE + 0x10,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_LOCALTIMER,
+ .end = IRQ_LOCALTIMER,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static void __init realview_pbx_twd_init(void)
+{
+ int err = twd_timer_register(realview_pbx_twd_resources,
+ ARRAY_SIZE(realview_pbx_twd_resources));
+ if (err)
+ pr_err("twd_timer_register failed %d\n", err);
+}
+#else
+#define realview_pbx_twd_init NULL
+#endif
+
static void __init realview_pbx_timer_init(void)
{
timer0_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE);
@@ -308,10 +333,9 @@ static void __init realview_pbx_timer_init(void)
timer2_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE) + 0x20;
-#ifdef CONFIG_LOCAL_TIMERS
if (core_tile_pbx11mp() || core_tile_pbxa9mp())
- twd_base = __io_address(REALVIEW_PBX_TILE_TWD_BASE);
-#endif
+ late_time_init = realview_pbx_twd_init;
+
realview_timer_init(IRQ_PBX_TIMER0_1);
}
--
1.7.0.4
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