> From: Bin Meng [mailto:bmeng...@gmail.com] > Sent: Friday, June 26, 2020 9:16 AM > To: Rick Jian-Zhi Chen(陳建志); U-Boot Mailing List > Cc: Atish Patra; Bin Meng > Subject: [PATCH v4 2/3] riscv: Expand the DT size before copy reserved memory > node > > From: Bin Meng <bin.m...@windriver.com> > > 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 <r...@andestech.com> > Signed-off-by: Bin Meng <bin.m...@windriver.com> > Reviewed-by: Atish Patra <atish.pa...@wdc.com> > --- > > (no changes since v3) > > Changes in v3: > - Extend the FDT size by 1024 bytes > > arch/riscv/lib/fdt_fixup.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) >
Reviewed-by: Rick Chen <r...@andestech.com> > diff --git a/arch/riscv/lib/fdt_fixup.c b/arch/riscv/lib/fdt_fixup.c index > 5f523f0..160ccca 100644 > --- a/arch/riscv/lib/fdt_fixup.c > +++ b/arch/riscv/lib/fdt_fixup.c > @@ -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); > > -- > 2.7.4