Hello,
I've done the port for AT91SAM9G45 on a AT91SAM9M10G45-EK board. The
following patch have to be applied on top of the
adeos-ipipe-2.6.38.8-arm-1.18-04.patch patch.
I also ran latency test under heavy stress using:
- hackbench to stress the scheduler
- netcat to stress the Ethernet interface and generate a lot of interrupts
- ls and dd( reading a /dev/mtdblock and writing on a tmpfs) for global stress
I join the results I had after running each latency test during 10 hours.
If the results I get seem the correct could you apply this patch in
Xenomai?
Should I also submit this patch to adeos project?
Regards
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
+33 602 196 044
From 39a2100b7bc34755d22409ea1f0d23a94bd99ed8 Mon Sep 17 00:00:00 2001
From: Gregory CLEMENT gregory.clem...@free-electrons.com
Date: Sat, 29 Oct 2011 19:16:57 +0200
Subject: [PATCH 1/1] Adeos / Xenomai port for AT91SAM9M10G45-EK
Signed-off-by: Gregory CLEMENT gregory.clem...@free-electrons.com
---
arch/arm/mach-at91/Makefile|1 +
arch/arm/mach-at91/at91_ipipe_time.c | 23 +
arch/arm/mach-at91/at91sam9g45.c | 50 +++-
arch/arm/mach-at91/include/mach/hardware.h |2 +
4 files changed, 68 insertions(+), 8 deletions(-)
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 5e11f9f..99c487d 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -105,4 +105,5 @@ obj-$(CONFIG_ARCH_AT91SAM9263) += at91_ipipe_time.o
obj-$(CONFIG_ARCH_AT91SAM9RL) += at91_ipipe_time.o
obj-$(CONFIG_ARCH_AT91SAM9G20) += at91_ipipe_time.o
obj-$(CONFIG_ARCH_AT91X40) += at91_ipipe_time.o
+obj-$(CONFIG_ARCH_AT91SAM9G45) += at91_ipipe_time.o
endif
diff --git a/arch/arm/mach-at91/at91_ipipe_time.c b/arch/arm/mach-at91/at91_ipipe_time.c
index b0aa6a4..2e97a28 100644
--- a/arch/arm/mach-at91/at91_ipipe_time.c
+++ b/arch/arm/mach-at91/at91_ipipe_time.c
@@ -6,6 +6,9 @@
* Adaptation to AT91SAM926x:
* Copyright (C) 2007 Gregory CLEMENT, Adeneo
*
+ * Adaptation to AT91SAM9G45:
+ * Copyright (C) 2011 Gregory CLEMENT, Free Electrons
+ *
* 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.
@@ -55,6 +58,10 @@
#define AT91_ID_TC0 AT91X40_ID_TC0
#define AT91_ID_TC1 AT91X40_ID_TC1
#define AT91_ID_TC2 AT91X40_ID_TC2
+#elif defined(CONFIG_ARCH_AT91SAM9G45)
+#define AT91_ID_TC0 AT91SAM9G45_ID_TCB
+#define AT91_ID_TC1 AT91SAM9G45_ID_TCB
+#define AT91_ID_TC2 AT91SAM9G45_ID_TCB
#else
#error AT91 processor unsupported by Adeos
#endif
@@ -146,12 +153,14 @@ at91_tc_set_mode(enum clock_event_mode mode, struct clock_event_device *dev)
if (mode == CLOCK_EVT_MODE_PERIODIC) {
unsigned long v;
-#ifndef CONFIG_ARCH_AT91SAM9263
- clk_enable(clk_get(NULL, tc
- __stringify(CONFIG_IPIPE_AT91_TC) _clk));
-#else /* AT91SAM9263 */
+#ifdef CONFIG_ARCH_AT91SAM9263
clk_enable(clk_get(NULL, tcb_clk));
-#endif /* AT91SAM9263 */
+#elif CONFIG_ARCH_AT91SAM9G45
+ clk_enable(clk_get(NULL, tcb0_clk));
+#else /* AT91SAM9263 and AT91SAM9G45*/
+ clk_enable(clk_get(NULL, tc
+ __stringify(CONFIG_IPIPE_AT91_TC) _clk));
+#endif
/* No Sync. */
at91_tc_write(AT91_TC_BCR, 0);
@@ -246,7 +255,7 @@ void __init at91_timer_init(void)
(void) at91_sys_read(AT91_ST_SR); /* Clear any pending interrupts */
#elif defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9261) \
|| defined(CONFIG_ARCH_AT91SAM9263) || defined(CONFIG_ARCH_AT91SAM9RL) \
- || defined(CONFIG_ARCH_AT91SAM9G20)
+ || defined(CONFIG_ARCH_AT91SAM9G20) || defined(CONFIG_ARCH_AT91SAM9G45)
at91_sys_write(AT91_PIT_MR, 0);
/* Clear any pending interrupts */
@@ -303,7 +312,7 @@ void __init at91_timer_init(void)
struct sys_timer at91rm9200_timer = {
#elif defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9261) \
|| defined(CONFIG_ARCH_AT91SAM9263) || defined(CONFIG_ARCH_AT91SAM9RL) \
- || defined(CONFIG_ARCH_AT91SAM9G20)
+ || defined(CONFIG_ARCH_AT91SAM9G20) || defined(CONFIG_ARCH_AT91SAM9G45)
struct sys_timer at91sam926x_timer = {
#elif defined(CONFIG_ARCH_AT91X40)
struct sys_timer at91x40_timer = {
diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index c67b47f..d0ef1af 100644
--- a/arch/arm/mach-at91/at91sam9g45.c
+++ b/arch/arm/mach-at91/at91sam9g45.c
@@ -31,7 +31,16 @@ static struct map_desc at91sam9g45_io_desc[] __initdata = {
.pfn = __phys_to_pfn(AT91_BASE_SYS),
.length = SZ_16K,
.type = MT_DEVICE,
- }, {
+ },
+#ifdef CONFIG_IPIPE
+ {
+ .virtual = AT91_VA_BASE_TCB0,
+ .pfn = __phys_to_pfn(AT91_BASE_TCB0),
+ .length = SZ_16K,
+ .type = MT_DEVICE,
+ },
+#endif /* CONFIG_IPIPE */
+ {
.virtual = AT91_IO_VIRT_BASE - AT91SAM9G45_SRAM_SIZE,
.pfn =
