arm: fdt: Relocate fdt along with other data
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>
diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index 0b47ab3..99cb54b 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -274,6 +274,8 @@
#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 @@
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 @@
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);