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riscv-pk
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RISC-V Proxy Kernel
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riscv-pk/bbl/bbl.ac

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Properly license all nontrivial files
8 years ago
# See LICENSE for license details.
Don't block for acks on console writes
9 years ago
AC_ARG_ENABLE([logo], AS_HELP_STRING([--enable-logo], [Enable boot logo]))
bbl/bbl.ac: use = instead of == for comparing equality (#158) == is not defined in POSIX and will fail when configure is called with shells that adhere strictly to POSIX like dash
7 years ago
AS_IF([test "x$enable_logo" = "xyes"], [
Don't look for riscv_logo.txt if logo is not enabled
8 years ago
AC_SUBST([BBL_ENABLE_LOGO], 1)
Refactor pk, bbl, machine into separate libraries Yuck.
10 years ago
AC_DEFINE([PK_ENABLE_LOGO],,[Define if the RISC-V logo is to be displayed])
])
AC_ARG_WITH([payload], AS_HELP_STRING([--with-payload], [Set ELF payload for bbl]),
RISC-V: Support separate firmware and kernel payload Support for separate firmware and kernel payload is added by updating BBL to read optional preloaded kernel address attributes from device-tree using a similar mechanism to that used to pass init ramdisk addresses to linux kernel. chosen { riscv,kernel-start = <0x00000000 0x80200000>; riscv,kernel-end = <0x00000000 0x80590634>; }; These attributes are added by QEMU and read by BBL when combining -bios <firmware-image> and -kernel <kernel-image> options. e.g. $ qemu-system-riscv64 -machine virt -bios bbl -kernel vmlinux With this change, bbl can be compiled without --with-payload and the dummy payload alignment is altered to make the memory footprint of the firmware-only bbl smaller. The dummy payload message is updated to indicate the alternative load method. This load method could also be supported by a first stage boot loader that reads seperate firmware and kernel from SPI flash. The main advantage of this new mechanism is that it eases kernel development by avoiding the riscv-pk packaging step after kernel builds, makes building per repository artefacts for CI simpler, and mimics bootloaders on other platforms that can load a kernel image file directly. Ultimately BBL should use an SPI driver to load the kernel image however this mechanism supports use cases such such as QEMU's -bios, -kernel and -initrd options following examples from other platforms that pass kernel entry to firmware via device-tree. Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Alistair Francis <Alistair.Francis@wdc.com> Signed-off-by: Michael Clark <mjc@sifive.com>
8 years ago
[
AC_SUBST([BBL_PAYLOAD], $with_payload, [Kernel payload for bbl])
AC_DEFINE(RELAXED_ALIGNMENT,[0],[Use relaxed payload alignment])
], [
AC_SUBST([BBL_PAYLOAD], [dummy_payload], [Kernel payload for bbl])
AC_DEFINE(RELAXED_ALIGNMENT,[1],[Use relaxed payload alignment])
])
Allow users to pick a logo
9 years ago
AC_ARG_WITH([logo], AS_HELP_STRING([--with-logo], [Specify a better logo]),
[AC_SUBST([BBL_LOGO_FILE], $with_logo, [Logo for bbl])],
[AC_SUBST([BBL_LOGO_FILE], [riscv_logo.txt], [Logo for bbl])])
configure: Add --enable-boot-machine in BBL If --enable-boot-machine is passed, BBL disables VM and runs the payload in machine mode. This is useful for payloads (e.g. RTOSes or other OSes) that want to run only in machine mode while still relying on bbl/pk for system calls and emulation
8 years ago
AC_ARG_ENABLE([boot-machine], AS_HELP_STRING([--enable-boot-machine], [Run payload in machine mode]))
bbl/bbl.ac: use = instead of == for comparing equality (#158) == is not defined in POSIX and will fail when configure is called with shells that adhere strictly to POSIX like dash
7 years ago
AS_IF([test "x$enable_boot_machine" = "xyes"], [
configure: Add --enable-boot-machine in BBL If --enable-boot-machine is passed, BBL disables VM and runs the payload in machine mode. This is useful for payloads (e.g. RTOSes or other OSes) that want to run only in machine mode while still relying on bbl/pk for system calls and emulation
8 years ago
AC_DEFINE([BBL_BOOT_MACHINE],,[Define to run payload in machine mode])
])