src/arch/riscv/Makefile.sbi

# -*- makefile -*- : Force emacs to use Makefile mode

# Build a position-independent executable, with relocations required
# only for data values.  Runtime relocations are applied by the
# prefix code.
#
CFLAGS		+= -mcmodel=medany -fpie
LDFLAGS		+= -pie --no-dynamic-linker -z combreloc

# Linker script
#
LDSCRIPT	= arch/riscv/scripts/sbi.lds

# Media types
#
MEDIA		+= sbi
MEDIA		+= lkrn

# Padded flash device images (e.g. for QEMU's -pflash option)
#
NON_AUTO_MEDIA	+= pf32
%.pf32 : %.sbi $(MAKEDEPS)
	$(Q)$(CP) $< $@
	$(Q)$(TRUNCATE) -s 32M $@
[sbi] Add support for running as a RISC-V SBI payload Add basic support for running directly on top of SBI, with no UEFI firmware present. Build as e.g.: make CROSS=riscv64-linux-gnu- bin-riscv64/ipxe.sbi The resulting binary can be tested in QEMU using e.g.: qemu-system-riscv64 -M virt -cpu max -serial stdio \ -kernel bin-riscv64/ipxe.sbi No drivers or executable binary formats are supported yet, but the unit test suite may be run successfully. Signed-off-by: Michael Brown <mcb30@ipxe.org> 2024-10-28 14:40:35 +00:00			`# -- makefile -- : Force emacs to use Makefile mode`

			`# Build a position-independent executable, with relocations required`
			`# only for data values. Runtime relocations are applied by the`
			`# prefix code.`
			`#`
			`CFLAGS += -mcmodel=medany -fpie`
[riscv] Use compressed relocation records Use compressed relocation records instead of raw Elf_Rela records. This saves around 15% of the total binary size for the all-drivers image bin-riscv64/ipxe.sbi. Signed-off-by: Michael Brown <mcb30@ipxe.org> 2025-05-06 14:53:29 +01:00			`LDFLAGS += -pie --no-dynamic-linker -z combreloc`
[sbi] Add support for running as a RISC-V SBI payload Add basic support for running directly on top of SBI, with no UEFI firmware present. Build as e.g.: make CROSS=riscv64-linux-gnu- bin-riscv64/ipxe.sbi The resulting binary can be tested in QEMU using e.g.: qemu-system-riscv64 -M virt -cpu max -serial stdio \ -kernel bin-riscv64/ipxe.sbi No drivers or executable binary formats are supported yet, but the unit test suite may be run successfully. Signed-off-by: Michael Brown <mcb30@ipxe.org> 2024-10-28 14:40:35 +00:00
			`# Linker script`
			`#`
			`LDSCRIPT = arch/riscv/scripts/sbi.lds`

			`# Media types`
			`#`
			`MEDIA += sbi`
[riscv] Add a .lkrn build target resembling a Linux kernel binary On x86 BIOS, it has been useful to be able to build iPXE to resemble a Linux kernel, so that it can be loaded by programs such as syslinux which already know how to handle Linux kernel binaries. Add an equivalent .lkrn build target for RISC-V SBI, allowing for build targets such as: make bin-riscv64/ipxe.lkrn make bin-riscv64/cgem.lkrn The Linux kernel header format allows us to specify a required length (including uninitialised-data portions) and defines that the image will be loaded at a fixed offset from the start of RAM. We can therefore use known-safe areas of memory (within our own .bss) for the initial temporary page table and stack. Signed-off-by: Michael Brown <mcb30@ipxe.org> 2025-05-13 12:51:53 +01:00			`MEDIA += lkrn`
[riscv] Add a .pf32 build target for padded parallel flash images QEMU's -pflash option requires an image that has been padded to the exact expected size (32MB for all of the supported RISC-V virtual machines). Add a .pf32 build target which is simply the equivalent .sbi target padded to 32MB in size, to simplify testing. Signed-off-by: Michael Brown <mcb30@ipxe.org> 2025-05-13 18:25:24 +01:00
			`# Padded flash device images (e.g. for QEMU's -pflash option)`
			`#`
			`NON_AUTO_MEDIA += pf32`
			`%.pf32 : %.sbi $(MAKEDEPS)`
			`$(Q)$(CP) $< $@`
			`$(Q)$(TRUNCATE) -s 32M $@`