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riscv: Expand the DT size before copy reserved memory node

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The FDT blob might not have sufficient space to hold a copy of
reserved memory node. Expand it before the copy.

Reported-by: Rick Chen <rick@andestech.com>
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Rick Chen <rick@andestech.com>
This commit is contained in:
Bin Meng 2020-06-25 18:16:07 -07:00 committed by Andes
parent c4f7c506d9
commit a8492e25ac
1 changed files with 12 additions and 0 deletions
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12
arch/riscv/lib/fdt_fixup.c
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@ -41,6 +41,18 @@ int riscv_fdt_copy_resv_mem_node(const void *src, void *dst)
return 0;
}
/*
* Extend the FDT by the following estimated size:
*
* Each PMP memory region entry occupies 64 bytes.
* With 16 PMP memory regions we need 64 * 16 = 1024 bytes.
*/
err = fdt_open_into(dst, dst, fdt_totalsize(dst) + 1024);
if (err < 0) {
printf("Device Tree can't be expanded to accommodate new node");
return err;
}
fdt_for_each_subnode(node, src, offset) {
name = fdt_get_name(src, node, NULL);