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arm: fdt: Relocate fdt along with other data

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Rather than leave the fdt down next to the code/data, we really should
relocate it along with everything else. For CONFIG_OF_EMBED this happens
automatically, but for CONFIG_OF_SEPARATE it does not.

Add code to copy the fdt and point to the new copy after relocation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Simon Glass 2012-09-27 15:41:55 +00:00 committed by Albert ARIBAUD
parent 1fb187b3b8
commit 39826f0997
1 changed files with 22 additions and 0 deletions
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22
arch/arm/lib/board.c
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@ -274,6 +274,8 @@ void board_init_f(ulong bootflag)
#ifdef CONFIG_PRAM
ulong reg;
#endif
void *new_fdt = NULL;
size_t fdt_size = 0;
bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
@ -409,6 +411,22 @@ void board_init_f(ulong bootflag)
debug("Reserving %zu Bytes for Global Data at: %08lx\n",
sizeof (gd_t), addr_sp);
#if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL)
/*
* If the device tree is sitting immediate above our image then we
* must relocate it. If it is embedded in the data section, then it
* will be relocated with other data.
*/
if (gd->fdt_blob) {
fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
addr_sp -= fdt_size;
new_fdt = (void *)addr_sp;
debug("Reserving %zu Bytes for FDT at: %08lx\n",
fdt_size, addr_sp);
}
#endif
/* setup stackpointer for exeptions */
gd->irq_sp = addr_sp;
#ifdef CONFIG_USE_IRQ
@ -442,6 +460,10 @@ void board_init_f(ulong bootflag)
gd->start_addr_sp = addr_sp;
gd->reloc_off = addr - _TEXT_BASE;
debug("relocation Offset is: %08lx\n", gd->reloc_off);
if (new_fdt) {
memcpy(new_fdt, gd->fdt_blob, fdt_size);
gd->fdt_blob = new_fdt;
}
memcpy(id, (void *)gd, sizeof(gd_t));
relocate_code(addr_sp, id, addr);