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SPL: Add support for loading image from ram in SPL.

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Signed-off-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Pavel Machek 2012-08-30 22:42:11 +02:00 committed by Tom Rini
parent 4212098181
commit c57b953da9
3 changed files with 26 additions and 0 deletions
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3
README
View File

@ -2669,6 +2669,9 @@ FIT uImage format:
CONFIG_SPL_SPI_SUPPORT
Support for drivers/spi/libspi.o in SPL binary
CONFIG_SPL_RAM_DEVICE
Support for running image already present in ram, in SPL binary
CONFIG_SPL_LIBGENERIC_SUPPORT
Support for lib/libgeneric.o in SPL binary

22
common/spl/spl.c
View File

@ -128,6 +128,23 @@ static void __noreturn jump_to_image_no_args(void)
image_entry((u32 *)boot_params_ptr_addr);
}
#ifdef CONFIG_SPL_RAM_DEVICE
static void spl_ram_load_image(void)
{
const struct image_header *header;
/*
* Get the header. It will point to an address defined by handoff
* which will tell where the image located inside the flash. For
* now, it will temporary fixed to address pointed by U-Boot.
*/
header = (struct image_header *)
(CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
spl_parse_image_header(header);
}
#endif
void board_init_r(gd_t *dummy1, ulong dummy2)
{
u32 boot_device;
@ -145,6 +162,11 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
boot_device = spl_boot_device();
debug("boot device - %d\n", boot_device);
switch (boot_device) {
#ifdef CONFIG_SPL_RAM_DEVICE
case BOOT_DEVICE_RAM:
spl_ram_load_image();
break;
#endif
#ifdef CONFIG_SPL_MMC_SUPPORT
case BOOT_DEVICE_MMC1:
case BOOT_DEVICE_MMC2:

1
doc/README.SPL
View File

@ -66,6 +66,7 @@ CONFIG_SPL_DMA_SUPPORT (drivers/dma/libdma.o)
CONFIG_SPL_POST_MEM_SUPPORT (post/drivers/memory.o)
CONFIG_SPL_NAND_LOAD (drivers/mtd/nand/nand_spl_load.o)
CONFIG_SPL_SPI_LOAD (drivers/mtd/spi/spi_spl_load.o)
CONFIG_SPL_RAM_DEVICE (common/spl/spl.c)
Normally CPU is assumed to be the same between the SPL and normal