[PATCH 11/34] ARM ep93xx boards: switch to barebox_arm_entry
Sascha Hauer
s.hauer at pengutronix.de
Fri Feb 1 02:59:24 EST 2013
This architecture is a bit strange. It has up to four SDRAM banks, but
all have a quite limited size. The SDRAM size for the different boards
currently is unknown as it's configurable with Kconfig. We use a SDRAM
size based on the value of the only board we have in the defconfigs:
edb9301. This likely breaks other ep93xx boards.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
arch/arm/Kconfig | 2 ++
arch/arm/boards/edb93xx/sdram_cfg.c | 4 ++++
arch/arm/mach-ep93xx/Kconfig | 8 --------
arch/arm/mach-ep93xx/Makefile | 4 ++--
arch/arm/mach-ep93xx/lowlevel_init.S | 11 ++++++++++-
5 files changed, 18 insertions(+), 11 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index dd8f01e..7b0e59a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -49,6 +49,8 @@ config ARCH_EP93XX
bool "Cirrus Logic EP93xx"
select CPU_ARM920T
select GENERIC_GPIO
+ select MACH_HAS_LOWLEVEL_INIT
+ select MACH_DO_LOWLEVEL_INIT
config ARCH_IMX
bool "Freescale iMX-based"
diff --git a/arch/arm/boards/edb93xx/sdram_cfg.c b/arch/arm/boards/edb93xx/sdram_cfg.c
index 9442129..5c2a537 100644
--- a/arch/arm/boards/edb93xx/sdram_cfg.c
+++ b/arch/arm/boards/edb93xx/sdram_cfg.c
@@ -36,6 +36,10 @@ static void program_mode_registers(void);
void sdram_cfg(void)
{
struct sdram_regs *sdram = (struct sdram_regs *)SDRAM_BASE;
+ unsigned long pc = get_pc();
+
+ if (pc < CONFIG_EP93XX_SDRAM_BANK3_BASE + CONFIG_EP93XX_SDRAM_BANK3_SIZE)
+ return;
writel(SDRAM_DEVCFG_VAL, &sdram->SDRAM_DEVCFG_REG);
diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig
index ed6e986..90859d5 100644
--- a/arch/arm/mach-ep93xx/Kconfig
+++ b/arch/arm/mach-ep93xx/Kconfig
@@ -38,7 +38,6 @@ choice
config MACH_EDB9301
bool "Cirrus Logic EDB9301"
select EP93XX_SDCE3_SYNC_PHYS_OFFSET
- select MACH_HAS_LOWLEVEL_INIT
help
Say y here if you are using Cirrus Logic's EDB9301 Evaluation board
@@ -103,14 +102,12 @@ choice
config MACH_EDB9302
bool "Cirrus Logic EDB9302"
select EP93XX_SDCE3_SYNC_PHYS_OFFSET
- select MACH_HAS_LOWLEVEL_INIT
help
Say y here if you are using Cirrus Logic's EDB9302 Evaluation board
config MACH_EDB9302A
bool "Cirrus Logic EDB9302A"
select EP93XX_SDCE0_PHYS_OFFSET
- select MACH_HAS_LOWLEVEL_INIT
help
Say y here if you are using Cirrus Logic's EDB9302A Evaluation board
@@ -222,14 +219,12 @@ choice
config MACH_EDB9307
bool "Cirrus Logic EDB9307"
select EP93XX_SDCE3_SYNC_PHYS_OFFSET
- select MACH_HAS_LOWLEVEL_INIT
help
Say y here if you are using Cirrus Logic's EDB9307 Evaluation board
config MACH_EDB9307A
bool "Cirrus Logic EDB9307A"
select EP93XX_SDCE0_PHYS_OFFSET
- select MACH_HAS_LOWLEVEL_INIT
help
Say y here if you are using Cirrus Logic's EDB9307A Evaluation board
@@ -309,7 +304,6 @@ choice
config MACH_EDB9312
bool "Cirrus Logic EDB9312"
select EP93XX_SDCE3_SYNC_PHYS_OFFSET
- select MACH_HAS_LOWLEVEL_INIT
help
Say y here if you are using Cirrus Logic's EDB9312 Evaluation board
@@ -358,14 +352,12 @@ choice
config MACH_EDB9315
bool "Cirrus Logic EDB9315"
select EP93XX_SDCE3_SYNC_PHYS_OFFSET
- select MACH_HAS_LOWLEVEL_INIT
help
Say y here if you are using Cirrus Logic's EDB9315 Evaluation board
config MACH_EDB9315A
bool "Cirrus Logic EDB9315A"
select EP93XX_SDCE0_PHYS_OFFSET
- select MACH_HAS_LOWLEVEL_INIT
help
Say y here if you are using Cirrus Logic's EDB9315A Evaluation board
diff --git a/arch/arm/mach-ep93xx/Makefile b/arch/arm/mach-ep93xx/Makefile
index 5615394..0ff0b66 100644
--- a/arch/arm/mach-ep93xx/Makefile
+++ b/arch/arm/mach-ep93xx/Makefile
@@ -1,4 +1,4 @@
obj-y += clocksource.o gpio.o led.o header.o
-obj-$(CONFIG_MACH_DO_LOWLEVEL_INIT) += lowlevel_init.o
-pbl-$(CONFIG_MACH_DO_LOWLEVEL_INIT) += lowlevel_init.o led.o
+obj-y += lowlevel_init.o
+pbl-y += lowlevel_init.o led.o
diff --git a/arch/arm/mach-ep93xx/lowlevel_init.S b/arch/arm/mach-ep93xx/lowlevel_init.S
index 6de53dd..154d38d 100644
--- a/arch/arm/mach-ep93xx/lowlevel_init.S
+++ b/arch/arm/mach-ep93xx/lowlevel_init.S
@@ -20,6 +20,7 @@
*
*/
+#include <sizes.h>
#include <mach/ep93xx-regs.h>
#include <asm/barebox-arm-head.h>
@@ -52,4 +53,12 @@ reset:
orr r0, r0, #0xc0000000
mcr p15, 0, r0, c1, c0, 0
- b board_init_lowlevel_return
+ /*
+ * FIXME: This is suitable for the edb9301, the
+ * only ep93xx board we have in our defconfigs.
+ * Other boards need different values here.
+ */
+ mov r0, #0x05000000
+ mov r1, #SZ_8M
+ mov r2, #0
+ b barebox_arm_entry
--
1.7.10.4
More information about the barebox
mailing list