[PATCH v4 0/6] DT related fixes for RISC-V UEFI

Atish Patra atish.patra at wdc.com
Tue Mar 24 05:16:44 CET 2020

This series adds few DT related fixes required for Linux EFI stub to work
on RISC-V.

Patch 1 adds the boot hartid property under /chosen node. The related
discussion can be found here.


Patch 2 fixes a generic issue in fdtdec related to reserved memory node.

Patch 3,4,5 provide one of the option to update reserved-memory node for next
It depends on Bin's following series in OpenSBI

The other options are SBI extension and trap/emulate on PMP csr access.
The detaild discussion can be found here.

Patch 1 & 2 can be applied independently from 3 and 4. I want to keep all
the patches together to provide a holistic view of changes required for

Changes v3->v4:
1. Dropped generic efi fix patch as it is already merged.
2. Moved all the fdt fixups to a common file.
3. Addressed few nit comments.

Changes from v2->v3:
1. Update the DT meant for OS if it is different from the one used by U-Boot
2. Use different FDT api to obtain "reg" address & size to honor the cell count.

Changes from v1->v2:
1. Fix the issue if chosen node is not present.

Changes from previous version:
1. Renamed the DT node property to "boot-hartid" from "efi-boot-hartid".
2. Changed the property type to u32 instead of u64 for RV32 compatibility.

Atish Patra (6):
riscv: Add boot hartid to Device tree
fdtdec: Fix boundary check
riscv: Provide a mechanism to fix DT for reserved memory
riscv: Setup reserved-memory node for FU540
riscv: Copy the reserved-memory nodes to final DT
riscv: Move all fdt fixups together

arch/riscv/cpu/start.S                |   1 +
arch/riscv/include/asm/global_data.h  |   1 +
arch/riscv/include/asm/u-boot-riscv.h |   2 +
arch/riscv/lib/Makefile               |   1 +
arch/riscv/lib/asm-offsets.c          |   1 +
arch/riscv/lib/bootm.c                |   5 -
arch/riscv/lib/fdt_fixup.c            | 128 ++++++++++++++++++++++++++
configs/sifive_fu540_defconfig        |   1 +
lib/fdtdec.c                          |   3 +-
9 files changed, 137 insertions(+), 6 deletions(-)
create mode 100644 arch/riscv/lib/fdt_fixup.c


More information about the U-Boot mailing list