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ARM: i.MX: edmqmx6: Copy fdt to SDRAM 

barebox only recognizes boarddata as dtb if it is inside SDRAM, so
copy the dtb there if necessary.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-01-30 10:29:09 +01:00
parent 9ef62b72ef
commit 223af73a24
1 changed files with 16 additions and 4 deletions
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20
arch/arm/boards/dmo-mx6-realq7/lowlevel.c
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@ -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();
/*
* 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;
}
fdt = (uint32_t)__dtb_imx6q_dmo_realq7_start - get_runtime_offset();
barebox_arm_entry(0x10000000, SZ_2G, fdt);
barebox_arm_entry(sdram, SZ_2G, fdt);
}