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modules/coreboot: Clarify PPC64 toolchain comments

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CROSS= is needed for skiboot on PPC64 due to different endianness
relative to coreboot.

The talos_2 fork doesn't share the toolchain because it is the only
_fork_, not board, to be precise.  We could add more boards using that
fork without having to create a shared toolchain, it only matters if we
add another fork or start building boards from the upstream release
too.

Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
This commit is contained in:
Jonathon Hall 2023-08-11 13:03:58 -04:00
parent c2df9f3942
commit 38e9d47bfd
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GPG Key ID: 1E9C3CA91AE25114
1 changed files with 3 additions and 3 deletions
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@ -10,8 +10,8 @@ ifeq "$(CONFIG_TARGET_ARCH)" "x86"
else ifeq "$(CONFIG_TARGET_ARCH)" "ppc64"
COREBOOT_TARGET := ppc64
LINUX_IMAGE_FILE := zImage
# skiboot payload needs this to find the cross compiler, it can't find
# it from XGCCPATH. This uses the Heads toolchain for skiboot
# skiboot payload needs the Heads toolchain as it is little-endian (like
# Linux), but coreboot is big-endian on PPC64.
COREBOOT_TARGET_CROSS := CROSS=$(CROSS)
else
$(error "$(CONFIG_TARGET_ARCH) target isn't supported by this module")
@ -72,7 +72,7 @@ $(eval $(call coreboot_module,4.20.1,))
# coreboot git forks
# talos_2 could use the 4.20.1 toolchain, but it's the only ppc64 board, so
# talos_2 could use the 4.20.1 toolchain, but it's the only ppc64 fork, so
# there is no point preparing another coreboot module that won't be shared with
# anything.
coreboot-talos_2_repo := https://github.com/Dasharo/coreboot