From c57b953da923c6402afc1c890c21fdc7d5a2cc4a Mon Sep 17 00:00:00 2001
From: Pavel Machek <pavel@denx.de>
Date: Thu, 30 Aug 2012 22:42:11 +0200
Subject: [PATCH] SPL: Add support for loading image from ram in SPL.
Signed-off-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Tom Rini <trini@ti.com>
---
README | 3 +++
common/spl/spl.c | 22 ++++++++++++++++++++++
doc/README.SPL | 1 +
3 files changed, 26 insertions(+)
diff --git a/README b/README
index c5e6a1a4c8..a745d0b379 100644
--- a/README
+++ b/README
@@ -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
diff --git a/common/spl/spl.c b/common/spl/spl.c
index f2f6de7f2a..c640f87404 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -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:
diff --git a/doc/README.SPL b/doc/README.SPL
index 5368586647..4e1cb28800 100644
--- a/doc/README.SPL
+++ b/doc/README.SPL
@@ -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
--
2.39.5