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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 03/28] ARM at91rm9200: provide reset function for boards with lowlevel init
Date: Wed, 17 Oct 2012 23:03:12 +0200	[thread overview]
Message-ID: <1350507817-7819-4-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1350507817-7819-1-git-send-email-s.hauer@pengutronix.de>

Some Atmel boards use a reset() function provided by the architecture.
Add a reset function for the board instead and call the architecture
specific init function from there. While at it, test if we are running
from SDRAM and skip the init function in this case. This makes the configs
safe for both first and second stage.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/boards/at91rm9200ek/Makefile         |    2 ++
 arch/arm/mach-at91/Kconfig                    |    3 +++
 arch/arm/mach-at91/Makefile                   |    7 ++-----
 arch/arm/mach-at91/at91rm9200_lowlevel_init.c |    9 ++++++---
 arch/arm/mach-at91/include/mach/board.h       |    1 +
 5 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/arch/arm/boards/at91rm9200ek/Makefile b/arch/arm/boards/at91rm9200ek/Makefile
index eb072c0..47ab803 100644
--- a/arch/arm/boards/at91rm9200ek/Makefile
+++ b/arch/arm/boards/at91rm9200ek/Makefile
@@ -1 +1,3 @@
 obj-y += init.o
+obj-y += lowlevel.o
+pbl-y += lowlevel.o
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index f962084..8ec033b 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -110,6 +110,9 @@ config SUPPORT_CALAO_MOB_TNY_MD2
 config HAVE_AT91SAM926X_LOWLEVEL_INIT
 	bool
 
+config HAVE_AT91RM9200_LOWLEVEL_INIT
+	bool
+
 # ----------------------------------------------------------
 
 if ARCH_AT91RM9200
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index f9cb4f1..5ce433c 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -1,10 +1,7 @@
 obj-y += clock.o gpio.o
 
-lowlevel_init-$(CONFIG_ARCH_AT91RM9200) = at91rm9200_lowlevel_init.o
-obj-$(CONFIG_MACH_DO_LOWLEVEL_INIT) += $(lowlevel_init-y)
-
-pbl-$(CONFIG_MACH_DO_LOWLEVEL_INIT) += $(lowlevel_init-y)
-
+obj-$(CONFIG_HAVE_AT91RM9200_LOWLEVEL_INIT) += at91rm9200_lowlevel_init.o
+pbl-$(CONFIG_HAVE_AT91RM9200_LOWLEVEL_INIT) += at91rm9200_lowlevel_init.o
 obj-$(CONFIG_HAVE_AT91SAM926X_LOWLEVEL_INIT) += at91sam926x_lowlevel_init.o
 pbl-$(CONFIG_HAVE_AT91SAM926X_LOWLEVEL_INIT) += at91sam926x_lowlevel_init.o
 
diff --git a/arch/arm/mach-at91/at91rm9200_lowlevel_init.c b/arch/arm/mach-at91/at91rm9200_lowlevel_init.c
index 3ce3e67..a0a0d5e 100644
--- a/arch/arm/mach-at91/at91rm9200_lowlevel_init.c
+++ b/arch/arm/mach-at91/at91rm9200_lowlevel_init.c
@@ -21,12 +21,15 @@ void static inline access_sdram(void)
 	writel(0x00000000, AT91_SDRAM_BASE);
 }
 
-void __naked __bare_init reset(void)
+void __naked __bare_init at91rm9200_entry(unsigned long sdram_base,
+		unsigned long sdram_size)
 {
-	u32 r;
+	u32 r, pc;
 	int i;
 
-	common_reset();
+	pc = get_pc();
+	if (pc < AT91_SDRAM_BASE || pc > AT91_SDRAM_BASE + 0x10000000)
+		goto end;
 
 	/*
 	 * PMC Check if the PLL is already initialized
diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index eb71ed5..fc8947d 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -156,5 +156,6 @@ struct at91_spi_platform_data {
 void at91_add_device_spi(int spi_id, struct at91_spi_platform_data *pdata);
 
 void at91sam926x_entry(unsigned long sdram_base, unsigned long sdram_size);
+void at91rm9200_entry(unsigned long sdram_base, unsigned long sdram_size);
 
 #endif
-- 
1.7.10.4


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  parent reply	other threads:[~2012-10-17 21:03 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-17 21:03 [PATCH] ARM: Make memory known to lowlevel code Sascha Hauer
2012-10-17 21:03 ` [PATCH 01/28] ARM: Make malloc available in all initcalls Sascha Hauer
2012-10-17 21:03 ` [PATCH 02/28] ARM at91sam926x: provide reset function for boards with lowlevel init Sascha Hauer
2012-10-18  7:26   ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-19 15:30     ` Sascha Hauer
2012-10-17 21:03 ` Sascha Hauer [this message]
2012-10-18  7:27   ` [PATCH 03/28] ARM at91rm9200: " Jean-Christophe PLAGNIOL-VILLARD
2012-10-17 21:03 ` [PATCH 04/28] ARM: Add new entry point for barebox Sascha Hauer
2012-10-17 21:03 ` [PATCH 05/28] ARM i.MX Add functions to get sdram base and size Sascha Hauer
2012-10-17 21:03 ` [PATCH 06/28] ARM i.MX boards: switch to barebox_arm_entry Sascha Hauer
2012-10-17 21:12   ` Alexander Shiyan
2012-11-01 19:21     ` Sascha Hauer
2012-10-17 21:03 ` [PATCH 07/28] ARM AT91 " Sascha Hauer
2012-10-17 21:03 ` [PATCH 08/28] ARM i.MXs " Sascha Hauer
2012-10-17 21:03 ` [PATCH 09/28] ARM OMAP " Sascha Hauer
2012-10-17 21:03 ` [PATCH 10/28] ARM Samsung " Sascha Hauer
2012-10-17 21:03 ` [PATCH 11/28] ARM PXA " Sascha Hauer
2012-10-17 21:03 ` [PATCH 12/28] ARM ep93xx " Sascha Hauer
2012-10-17 21:03 ` [PATCH 13/28] ARM tegra " Sascha Hauer
2012-10-17 21:03 ` [PATCH 14/28] ARM nomadik " Sascha Hauer
2012-10-17 21:03 ` [PATCH 15/28] ARM versatile " Sascha Hauer
2012-10-17 21:03 ` [PATCH 16/28] ARM netx " Sascha Hauer
2012-10-17 21:03 ` [PATCH 17/28] ARM: remove now unused *_LOWLEVEL_INIT Kconfig options Sascha Hauer
2012-10-17 21:03 ` [PATCH 18/28] ARM start: remove unused board_init_lowlevel* functions Sascha Hauer
2012-10-17 21:03 ` [PATCH 19/28] ARM pbl: setup stack at end of SDRAM Sascha Hauer
2012-10-17 21:03 ` [PATCH 20/28] ARM pbl: Call uncompressed binary with arguments Sascha Hauer
2012-10-18  7:29   ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-19 15:32     ` Sascha Hauer
2012-10-19 16:15       ` Sascha Hauer
2012-10-17 21:03 ` [PATCH 21/28] ARM pbl: make MMU functional again Sascha Hauer
2012-10-17 21:03 ` [PATCH 22/28] ARM start: pick up memory/boarddata arguments from pbl Sascha Hauer
2012-10-17 21:03 ` [PATCH 23/28] ARM start: Add barebox_arm_boarddata function Sascha Hauer
2012-10-17 21:03 ` [PATCH 24/28] ARM: Determine base and size of malloc space from SDRAM Sascha Hauer
2012-10-17 21:03 ` [PATCH 25/28] ARM pbl: always copy piggydata Sascha Hauer
2012-10-18  7:23   ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-19 15:34     ` Sascha Hauer
2012-10-19 17:27       ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-17 21:03 ` [PATCH 26/28] ARM i.MX: Use SRAM stack in lowlevel code Sascha Hauer
2012-10-17 21:03 ` [PATCH 27/28] generic memory layout: fix deps for [MALLOC|STACK]_BASE Sascha Hauer
2012-10-17 21:03 ` [PATCH 28/28] ARM: disable HAVE_CONFIGURABLE_MEMORY_LAYOUT Sascha Hauer

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