Attention is currently required from: Kapil Porwal, Subrata Banik.

Subrata Banik uploaded patch set #21 to this change.

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The following approvals got outdated and were removed: Verified+1 by build bot (Jenkins)

libpayload: Add x86_64 (64-bit) support

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=Entered libpayload in long mode, successfully parsed coreboot
table.

Change-Id: I69fda47bedf1a14807b1515c4aed6e3a1d5b8585
Signed-off-by: Subrata Banik <subratabanik@google.com>
---
M payloads/libpayload/Kconfig
M payloads/libpayload/Makefile
M payloads/libpayload/Makefile.mk
M payloads/libpayload/arch/x86/Kconfig
M payloads/libpayload/arch/x86/Makefile.mk
M payloads/libpayload/arch/x86/exception.c
A payloads/libpayload/arch/x86/exception_asm_64.S
A payloads/libpayload/arch/x86/exec_64.S
M payloads/libpayload/arch/x86/gdb.c
M payloads/libpayload/arch/x86/head.S
A payloads/libpayload/arch/x86/head_32.S
A payloads/libpayload/arch/x86/head_64.S
A payloads/libpayload/arch/x86/libpayload_64.ldscript
M payloads/libpayload/arch/x86/main.c
M payloads/libpayload/arch/x86/multiboot.c
M payloads/libpayload/arch/x86/string.c
M payloads/libpayload/bin/lpgcc
M payloads/libpayload/drivers/storage/ahci_common.c
M payloads/libpayload/drivers/timer/Kconfig
M payloads/libpayload/drivers/usb/Kconfig
M payloads/libpayload/drivers/usb/uhci.c
M payloads/libpayload/drivers/usb/xhci.c
M payloads/libpayload/include/sysinfo.h
M payloads/libpayload/include/x86/arch/exception.h
M payloads/libpayload/libc/exec.c
M payloads/libpayload/libc/time.c
M payloads/libpayload/sample/Makefile
M payloads/libpayload/vboot/Kconfig
M payloads/libpayload/vboot/Makefile.mk
29 files changed, 895 insertions(+), 138 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/68/81968/21

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