Hello
I made a patch in order to support the Atmel AT91SAM9G20 processor,
which has to be applied after the "adeos-ipipe-2.6.27-arm-*" patch.
Due to the similarities between the AT91SAM9260 and the AT91SAM9G20
processor, only a few changes were necessary. I booted the system on a
"AT91SAM9G20-EK" development
board and executed "latencytest" and "clocktest". Are there plans to
officially support this processor in the future?
Martin
Thu Jun 4 12:19:58 UTC 2009
running: ./run -- -p 200 -t0 # latency
*
*
* Type ^C to stop this application.
*
*
== Sampling period: 200 us
== Test mode: periodic user-mode task
== All results in microseconds
warming up...
RTT| 00:00:01 (periodic user-mode task, 200 us period, priority 99)
RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst
RTD| 37.790| 47.480| 71.705| 0| 37.790| 71.705
RTD| 10.658| 47.480| 74.612| 0| 10.658| 74.612
RTD| 21.317| 47.480| 71.705| 0| 10.658| 74.612
RTD| 21.317| 47.480| 71.705| 0| 10.658| 74.612
RTD| 20.348| 47.480| 71.705| 0| 10.658| 74.612
RTD| 20.348| 47.480| 71.705| 0| 10.658| 74.612
.
.
r...@at91sam9g20ek-xenomai:/usr/xenomai/bin# ./clocktest
== Tested clock: 0 (CLOCK_REALTIME)
CPU ToD offset [us] ToD drift [us/s] warps max delta [us]
--- -------------------- ---------------- ---------- --------------
0 -1244111499212379.2 -0.040 0 0.0
--------------------
diff -urp a/arch/arm/mach-at91/at91_ipipe_time.c
b/arch/arm/mach-at91/at91_ipipe_time.c
--- a/arch/arm/mach-at91/at91_ipipe_time.c 2009-06-03
15:23:30.000000000 +0200
+++ b/arch/arm/mach-at91/at91_ipipe_time.c 2009-06-03
15:24:59.000000000 +0200
@@ -34,7 +34,7 @@
#define AT91_ID_TC0 AT91RM9200_ID_TC0
#define AT91_ID_TC1 AT91RM9200_ID_TC1
#define AT91_ID_TC2 AT91RM9200_ID_TC2
-#elif defined(CONFIG_ARCH_AT91SAM9260)
+#elif defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
#define AT91_ID_TC0 AT91SAM9260_ID_TC0
#define AT91_ID_TC1 AT91SAM9260_ID_TC1
#define AT91_ID_TC2 AT91SAM9260_ID_TC2
@@ -339,7 +339,7 @@ void __init at91_timer_init(void)
at91_sys_write(AT91_ST_IDR, AT91_ST_PITS | AT91_ST_WDOVF |
AT91_ST_RTTINC | AT91_ST_ALMS);
(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_AT91SAM9263) ||
defined(CONFIG_ARCH_AT91SAM9RL) || defined(CONFIG_ARCH_AT91SAM9G20)
at91_sys_write(AT91_PIT_MR, 0);
/* Clear any pending interrupts */
@@ -399,7 +399,7 @@ void __init at91_timer_init(void)
#ifdef CONFIG_ARCH_AT91RM9200
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_AT91SAM9263) ||
defined(CONFIG_ARCH_AT91SAM9RL)|| defined(CONFIG_ARCH_AT91SAM9RL) ||
defined(CONFIG_ARCH_AT91SAM9G20)
struct sys_timer at91sam926x_timer = {
#elif defined(CONFIG_ARCH_AT91X40)
struct sys_timer at91x40_timer = {
diff -urp a/arch/arm/mach-at91/include/mach/cpu.h
b/arch/arm/mach-at91/include/mach/cpu.h
--- a/arch/arm/mach-at91/include/mach/cpu.h 2009-06-03
15:23:30.000000000 +0200
+++ b/arch/arm/mach-at91/include/mach/cpu.h 2009-06-03
15:24:59.000000000 +0200
@@ -69,7 +69,7 @@ static inline unsigned long at91cap9_rev
#ifdef CONFIG_ARCH_AT91SAM9260
#define cpu_is_at91sam9xe() (at91_arch_identify() == ARCH_FAMILY_AT91SAM9XE)
-#define cpu_is_at91sam9260() ((at91_cpu_identify() ==
ARCH_ID_AT91SAM9260) || cpu_is_at91sam9xe())
+#define cpu_is_at91sam9260() ((at91_cpu_identify() ==
ARCH_ID_AT91SAM9260) || cpu_is_at91sam9xe() ||
(at91_cpu_identify()==ARCH_ID_AT91SAM9G20)))
#else
#define cpu_is_at91sam9xe() (0)
#define cpu_is_at91sam9260() (0)
diff -urp a/arch/arm/mach-at91/include/mach/hardware.h
b/arch/arm/mach-at91/include/mach/hardware.h
--- a/arch/arm/mach-at91/include/mach/hardware.h 2009-06-03
15:23:30.000000000 +0200
+++ b/arch/arm/mach-at91/include/mach/hardware.h 2009-06-03
15:24:59.000000000 +0200
@@ -64,7 +64,7 @@
#ifdef CONFIG_IPIPE
#if defined(CONFIG_ARCH_AT91RM9200)
#define AT91_BASE_TCB0 AT91RM9200_BASE_TCB0
-#elif defined(CONFIG_ARCH_AT91SAM9260)
+#elif defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
#define AT91_BASE_TCB0 AT91SAM9260_BASE_TCB0
#elif defined(CONFIG_ARCH_AT91SAM9261)
#define AT91_BASE_TCB0 AT91SAM9261_BASE_TCB0
diff -urp a/arch/arm/mach-at91/include/mach/irqs.h
b/arch/arm/mach-at91/include/mach/irqs.h
--- a/arch/arm/mach-at91/include/mach/irqs.h 2009-06-03
15:23:30.000000000 +0200
+++ b/arch/arm/mach-at91/include/mach/irqs.h 2009-06-03
15:24:59.000000000 +0200
@@ -52,7 +52,7 @@ extern unsigned __ipipe_at91_gpio_banks;
#define __ipipe_mach_irq_mux_p(irq) \
((unsigned) (irq - AT91RM9200_ID_PIOA) < __ipipe_at91_gpio_banks)
-#elif defined(CONFIG_ARCH_AT91SAM9260)
+#elif defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
#define __ipipe_mach_irq_mux_p(irq) \
((unsigned) (irq - AT91SAM9260_ID_PIOA) < __ipipe_at91_gpio_banks)
diff -urp a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
--- a/arch/arm/mach-at91/Makefile 2009-06-03 15:23:30.000000000 +0200
+++ b/arch/arm/mach-at91/Makefile 2009-06-03 15:24:59.000000000 +0200
@@ -82,6 +82,7 @@ ifeq ($(CONFIG_IPIPE),y)
obj-y := $(filter-out at91rm9200_time.o at91sam926x_time.o
at91x40_time.o, $(obj-y))
obj-$(CONFIG_ARCH_AT91RM9200) += at91_ipipe_time.o
obj-$(CONFIG_ARCH_AT91SAM9260) += at91_ipipe_time.o
+obj-$(CONFIG_ARCH_AT91SAM9G20) += at91_ipipe_time.o
obj-$(CONFIG_ARCH_AT91SAM9261) += at91_ipipe_time.o
obj-$(CONFIG_ARCH_AT91SAM9263) += at91_ipipe_time.o
obj-$(CONFIG_ARCH_AT91SAM9RL) += at91_ipipe_time.o
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