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[riscv] Add support for the RISC-V CPU architecture

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Add support for building iPXE as a 64-bit or 32-bit RISC-V binary, for
either UEFI or Linux userspace platforms.  For example:

  # RISC-V 64-bit UEFI
  make CROSS=riscv64-linux-gnu- bin-riscv64-efi/ipxe.efi

  # RISC-V 32-bit UEFI
  make CROSS=riscv64-linux-gnu- bin-riscv32-efi/ipxe.efi

  # RISC-V 64-bit Linux
  make CROSS=riscv64-linux-gnu- bin-riscv64-linux/tests.linux
  qemu-riscv64 -L /usr/riscv64-linux-gnu/sys-root \
               ./bin-riscv64-linux/tests.linux

  # RISC-V 32-bit Linux
  make CROSS=riscv64-linux-gnu- SYSROOT=/usr/riscv32-linux-gnu/sys-root \
       bin-riscv32-linux/tests.linux
  qemu-riscv32 -L /usr/riscv32-linux-gnu/sys-root \
               ./bin-riscv32-linux/tests.linux

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2024-09-15 10:54:04 +01:00
parent 68db9a3cb3
commit c215048dda
42 changed files with 2405 additions and 0 deletions
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14
src/arch/riscv64/Makefile.efi Normal file
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@@ -0,0 +1,14 @@
# -*- makefile -*- : Force emacs to use Makefile mode
# Specify EFI image builder
#
ELF2EFI = $(ELF2EFI64)
# Specify EFI boot file
#
EFI_BOOT_FILE = bootriscv64.efi
# Include generic EFI Makefile
#
MAKEDEPS += arch/riscv/Makefile.efi
include arch/riscv/Makefile.efi