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platform: sifive: fu540: Add 32-bit specific fdt/payload addresses

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For testing 32-bit SiFive specific drivers with QEMU riscv32, add
32-bit specific FW_JUMP_FDT_ADDR and FW_PAYLOAD_OFFSET.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Bin Meng 2020-02-18 02:15:59 -08:00 • committed by Anup Patel
parent 24c3082ea4
commit 66fb729a1e
2 changed files with 18 additions and 2 deletions
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4
docs/platform/sifive_fu540.md
View file

@ -193,5 +193,9 @@ generated by QEMU, and u-boot.bin should be used as the payload image, like:
make PLATFORM=sifive/fu540 FW_PAYLOAD_PATH=<u-boot_build_dir>/u-boot.bin
```
While the real hardware operates at the 64-bit mode, it's possible for QEMU to
test the 32-bit OpenSBI firmware. This can be helpful for testing 32-bit SiFive
specific drivers.
[U-Boot]: https://gitlab.denx.de/u-boot/u-boot/blob/master/doc/board/sifive/fu540.rst
[FSBL]: https://github.com/sifive/freedom-u540-c000-bootloader

16
platform/sifive/fu540/config.mk
View file

@ -21,8 +21,20 @@ platform-runcmd = qemu-system-riscv$(PLATFORM_RISCV_XLEN) -M sifive_u -m 256M \
FW_TEXT_START=0x80000000
FW_DYNAMIC=y
FW_JUMP=y
FW_JUMP_ADDR=0x80200000
ifeq ($(PLATFORM_RISCV_XLEN), 32)
# This needs to be 4MB aligned for 32-bit system
FW_JUMP_ADDR=0x80400000
else
# This needs to be 2MB aligned for 64-bit system
FW_JUMP_ADDR=0x80200000
endif
FW_JUMP_FDT_ADDR=0x88000000
FW_PAYLOAD=y
FW_PAYLOAD_OFFSET=0x200000
ifeq ($(PLATFORM_RISCV_XLEN), 32)
# This needs to be 4MB aligned for 32-bit system
FW_PAYLOAD_OFFSET=0x400000
else
# This needs to be 2MB aligned for 64-bit system
FW_PAYLOAD_OFFSET=0x200000
endif
FW_PAYLOAD_FDT_ADDR=0x88000000