barebox only recognizes boarddata as dtb if it is inside SDRAM, so
copy the dtb there if necessary.
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
arch/arm/boards/dmo-mx6-realq7/lowlevel.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/arch/arm/boards/dmo-mx6-realq7/lowlevel.c
b/arch/arm/boards/dmo-mx6-realq7/lowlevel.c
index f47575e..7f6168c 100644
--- a/arch/arm/boards/dmo-mx6-realq7/lowlevel.c
+++ b/arch/arm/boards/dmo-mx6-realq7/lowlevel.c
@@ -15,6 +15,7 @@
#include <common.h>
#include <sizes.h>
#include <io.h>
+#include <debug_ll.h>
#include <asm/sections.h>
#include <asm/mmu.h>
#include <asm/barebox-arm-head.h>
@@ -136,26 +137,37 @@ static void sdram_init(void)
writel(0x0000047f, 0x021e80a4);
writel(0x0000c34f, 0x021e80a8);
writel(0x00000001, 0x021e8080);
+ putc_ll('>');
}
extern char __dtb_imx6q_dmo_realq7_start[];
+extern char __dtb_imx6q_dmo_realq7_end[];
ENTRY_FUNCTION(start_imx6_realq7, r0, r1, r2)
{
- uint32_t fdt;
+ unsigned long fdt, sdram = 0x10000000;
arm_cpu_lowlevel_init();
arm_setup_stack(0x00940000 - 8);
+ fdt = (unsigned long)__dtb_imx6q_dmo_realq7_start -
get_runtime_offset();
+
if (get_pc() < 0x10000000) {
sdram_init();
mmdc_do_write_level_calibration();
mmdc_do_dqs_calibration();
- }
- fdt = (uint32_t)__dtb_imx6q_dmo_realq7_start - get_runtime_offset();
+ /*
+ * Copy the devicetree blob to sdram so that the barebox code
finds it
+ * inside valid SDRAM instead of SRAM.
+ */
+ memcpy((void *)sdram, (void *)fdt,
+ __dtb_imx6q_dmo_realq7_end -
+ __dtb_imx6q_dmo_realq7_start);
+ fdt = sdram;
+ }
- barebox_arm_entry(0x10000000, SZ_2G, fdt);
+ barebox_arm_entry(sdram, SZ_2G, fdt);
}
--
1.8.5.3
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