mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-10-21 13:35:09 +00:00
6b6024eadb
There are two enable methods supported by ARM64 Linux; psci and spin-table. The latter is simpler and helpful for quick SoC bring up. My main motivation for this patch is to improve the spin-table support, which allows us to boot an ARMv8 system without the ARM Trusted Firmware. Currently, we have multi-entry code in arch/arm/cpu/armv8/start.S and the spin-table is supported in a really ad-hoc way, and I see some problems: - We must hard-code CPU_RELEASE_ADDR so that it matches the "cpu-release-addr" property in the DT that comes from the kernel tree. - The Documentation/arm64/booting.txt in Linux requires that the release address must be zero-initialized, but it is not cared by the common code in U-Boot. We must do it in a board function. - There is no systematic way to protect the spin-table code from the kernel. We are supposed to do it in a board specific manner, but it is difficult to predict where the spin-table code will be located after the relocation. So, it also makes difficult to hard-code /memreserve/ in the DT of the kernel. So, here is a patch to solve those problems; the DT is run-time modified to reserve the spin-table code (+ cpu-release-addr). Also, the "cpu-release-addr" property is set to an appropriate address after the relocation, which means we no longer need the hard-coded CPU_RELEASE_ADDR. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
25 lines
553 B
Makefile
25 lines
553 B
Makefile
#
|
|
# (C) Copyright 2000-2003
|
|
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
#
|
|
# SPDX-License-Identifier: GPL-2.0+
|
|
#
|
|
|
|
extra-y := start.o
|
|
|
|
obj-y += cpu.o
|
|
obj-y += generic_timer.o
|
|
obj-y += cache_v8.o
|
|
obj-y += exceptions.o
|
|
obj-y += cache.o
|
|
obj-y += tlb.o
|
|
obj-y += transition.o
|
|
obj-y += fwcall.o
|
|
ifndef CONFIG_SPL_BUILD
|
|
obj-$(CONFIG_ARMV8_SPIN_TABLE) += spin_table.o spin_table_v8.o
|
|
endif
|
|
|
|
obj-$(CONFIG_FSL_LAYERSCAPE) += fsl-layerscape/
|
|
obj-$(CONFIG_S32V234) += s32v234/
|
|
obj-$(CONFIG_ARCH_ZYNQMP) += zynqmp/
|
|
obj-$(CONFIG_TARGET_HIKEY) += hisilicon/
|