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at91: add bootstrap version 

This will allow to boot from NAND/MMC and others.
This version of bootstrap is a non shell version of barebox compressed by the
pbl.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD 2013-01-22 15:40:44 +01:00 committed by Sascha Hauer
parent df132b9d78
commit ea023b9b7b
4 changed files with 129 additions and 0 deletions
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5
arch/arm/mach-at91/Kconfig
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@ -494,4 +494,9 @@ config CMD_AT91_BOOT_TEST
endif
config AT91_BOOTSTRAP
bool "at91 bootstrap"
depends on MACH_HAS_LOWLEVEL_INIT
select BOOTSTRAP
endif

1
arch/arm/mach-at91/Makefile
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@ -1,6 +1,7 @@
obj-y += setup.o clock.o gpio.o
obj-$(CONFIG_CMD_AT91_BOOT_TEST) += boot_test_cmd.o
obj-$(CONFIG_AT91_BOOTSTRAP) += bootstrap.o
lowlevel_init-y = at91sam926x_lowlevel_init.o
lowlevel_init-$(CONFIG_ARCH_AT91RM9200) = at91rm9200_lowlevel_init.o
obj-$(CONFIG_MACH_DO_LOWLEVEL_INIT) += $(lowlevel_init-y)

95
arch/arm/mach-at91/bootstrap.c Normal file
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@ -0,0 +1,95 @@
/*
* Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio@jcrosoft.com>
*
* Under GPLv2
*/
#include <common.h>
#include <bootstrap.h>
#include <mach/bootstrap.h>
#include <sizes.h>
#include <malloc.h>
#include <init.h>
#if defined(CONFIG_MCI_ATMEL)
#define is_mmc() 1
#else
#define is_mmc() 0
#endif
#ifdef CONFIG_NAND_ATMEL
#define is_nand() 1
#else
#define is_nand() 0
#endif
#ifdef CONFIG_MTD_M25P80
#define is_m25p80() 1
#else
#define is_m25p80() 0
#endif
#ifdef CONFIG_MTD_DATAFLASH
#define is_dataflash() 1
#else
#define is_dataflash() 0
#endif
static void boot_seq(bool is_barebox)
{
char *name = is_barebox ? "barebox" : "unknown";
int (*func)(void) = NULL;
if (is_m25p80()) {
func = bootstrap_board_read_m25p80();
printf("Boot %s from m25p80\n", name);
bootstrap_boot(func, is_barebox);
bootstrap_err("... failed\n");
free(func);
}
if (is_dataflash()) {
printf("Boot %s from dataflash\n", name);
func = bootstrap_board_read_dataflash();
bootstrap_boot(func, is_barebox);
bootstrap_err("... failed\n");
free(func);
}
if (is_nand()) {
printf("Boot %s from nand\n", name);
func = bootstrap_read_devfs("nand0", true, SZ_128K, SZ_256K, SZ_1M);
bootstrap_boot(func, is_barebox);
bootstrap_err("... failed\n");
free(func);
}
}
static int at91_bootstrap(void)
{
int (*func)(void) = NULL;
if (is_mmc()) {
printf("Boot from mmc\n");
func = bootstrap_read_disk("disk0.0", NULL);
bootstrap_boot(func, false);
bootstrap_err("... failed\n");
free(func);
}
/* First only bootstrap_boot a barebox */
boot_seq(true);
/* Second bootstrap_boot any */
boot_seq(false);
bootstrap_err("bootstrap_booting failed\n");
while (1);
return 0;
}
static int at91_set_bootstrap(void)
{
barebox_main = at91_bootstrap;
return 0;
}
late_initcall(at91_set_bootstrap);

28
arch/arm/mach-at91/include/mach/bootstrap.h Normal file
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@ -0,0 +1,28 @@
/*
* Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnio@jcrosoft.com>
*
* Under GPLv2
*/
#ifndef __MACH_BOOTSTRAP_H__
#define __MACH_BOOTSTRAP_H__
#ifdef CONFIG_MTD_M25P80
void * bootstrap_board_read_m25p80(void);
#else
static inline void * bootstrap_board_read_m25p80(void)
{
return NULL;
}
#endif
#ifdef CONFIG_MTD_DATAFLASH
void * bootstrap_board_read_dataflash(void);
#else
static inline void * bootstrap_board_read_dataflash(void)
{
return NULL;
}
#endif
#endif /* __MACH_BOOTSTRAP_H__ */