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ARM ep93xx boards: switch to barebox_arm_entry 

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@pengutronix.de>
This commit is contained in:
Sascha Hauer 2012-10-14 22:24:12 +02:00
parent bf61adb050
commit b7e7def623
5 changed files with 18 additions and 11 deletions
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2
arch/arm/Kconfig
View File

@ -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"

4
arch/arm/boards/edb93xx/sdram_cfg.c
View File

@ -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);

8
arch/arm/mach-ep93xx/Kconfig
View File

@ -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

4
arch/arm/mach-ep93xx/Makefile
View File

@ -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

11
arch/arm/mach-ep93xx/lowlevel_init.S
View File

@ -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