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libpayload: Add x86_64 (64-bit) support

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This patch introduces x86_64 (64-bit) support to the payload, building
upon the existing x86 (32-bit) architecture. Files necessary for 64-bit
compilation are now guarded by the `CONFIG_LP_ARCH_X86_64` Kconfig
option.

BUG=b:242829490
TEST=Able to verify all valid combinations between coreboot and
payload with this patch.

Payload Entry Point Behavior with below code.

+----------------+--------------------+----------------------------+
| LP_ARCH_X86_64 | Payload Entry Mode | Description                |
+----------------+--------------------+----------------------------+
| No             | 32-bit             | Direct protected mode init |
+----------------+--------------------+----------------------------+
| Yes            | 32-bit             | Protected to long mode     |
+----------------+--------------------+----------------------------+
| Yes            | 64-bit             | Long mode initialization   |
+----------------+--------------------+----------------------------+

Change-Id: I69fda47bedf1a14807b1515c4aed6e3a1d5b8585
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81968
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Subrata Banik
2024-05-18 12:26:40 +00:00
parent 4244527d8c
commit afa39105d8
18 changed files with 686 additions and 58 deletions
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16
payloads/libpayload/arch/x86/Makefile.mk
View File

@@ -27,16 +27,26 @@
##
ifneq ($(CONFIG_LP_COMPILER_LLVM_CLANG),y)
ifeq ($(CONFIG_LP_ARCH_X86_64),y)
CFLAGS += -mpreferred-stack-boundary=4
else
CFLAGS += -mpreferred-stack-boundary=2
endif
endif
libc-y += head.S
libc-$(CONFIG_LP_ARCH_X86_32) += head.S
libc-$(CONFIG_LP_ARCH_X86_64) += head_64.S
libc-$(CONFIG_LP_ARCH_X86_64) += pt.S
libc-y += main.c sysinfo.c
libc-y += timer.c coreboot.c util.S
libc-y += exec.S virtual.c
libc-y += virtual.c
libc-y += selfboot.c cache.c
libc-y += exception_asm.S exception.c
libc-y += exception.c
libc-y += delay.c
libc-$(CONFIG_LP_ARCH_X86_32) += exec.c
libc-$(CONFIG_LP_ARCH_X86_32) += exec.S
libc-$(CONFIG_LP_ARCH_X86_32) += exception_asm.S
libc-$(CONFIG_LP_ARCH_X86_64) += exception_asm_64.S
# Will fall back to default_memXXX() in libc/memory.c if GPL not allowed.
libc-$(CONFIG_LP_GPL) += string.c