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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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2
payloads/libpayload/libc/Makefile.mk
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@@ -29,7 +29,7 @@
libc-$(CONFIG_LP_LIBC) += malloc.c printf.c console.c string.c
libc-$(CONFIG_LP_LIBC) += memory.c ctype.c lib.c libgcc.c
libc-$(CONFIG_LP_LIBC) += rand.c time.c exec.c
libc-$(CONFIG_LP_LIBC) += rand.c time.c
libc-$(CONFIG_LP_LIBC) += readline.c getopt_long.c sysinfo.c
libc-$(CONFIG_LP_LIBC) += args.c
libc-$(CONFIG_LP_LIBC) += strlcpy.c