]> git.dujemihanovic.xyz Git - u-boot.git/commit
riscv: Add boot hartid to device tree
authorAtish Patra <atish.patra@wdc.com>
Tue, 21 Apr 2020 18:14:59 +0000 (11:14 -0700)
committerAndes <uboot@andestech.com>
Thu, 23 Apr 2020 02:14:16 +0000 (10:14 +0800)
commit5370478d1c7afb8b2a8a0a00b31ff97c3a2c0451
treece82a93610acdd6250c6c3d7cb687cde5042b852
parentfa16ec23bcc8c855106f055d6e552e4cc203a87d
riscv: Add boot hartid to device tree

Linux booting protocol mandates that register "a0" contains the hartid.
However, U-Boot can not pass the hartid via a0 during standard UEFI
protocol. DT nodes are commonly used to pass such information to the OS.

Add a DT node under chosen node to indicate the boot hartid. EFI stub
in Linux kernel will parse this node and pass it to the real kernel
in "a0" before jumping to it.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
arch/riscv/lib/bootm.c