Conor Dooley f39b1b77d8 riscv: support extension probing using riscv, isa-extensions ... A new property has been added, with an extensive rationale at [1], that can be used in place of "riscv,isa" to indicate what extensions are supported by a given platform that is a list of strings rather than a single string. There are some differences between the new property, "riscv,isa-extensions" and the incumbent "riscv,isa" - chief among them for the sake of parsing being the list of strings, as opposed to a string. Another advantage is strictly defined meanings for each string in a dt-binding, rather than deriving meaning from RVI standards. This will likely to some divergence over time, but U-Boot's current use of extension detection is very limited - there are just four callsites of supports_extension() in mainline U-Boot. These checks are limited to two checks for FPU support and two checks for "s" and "u". "s" and "u" are not supported by the new property, but they were also not permitted in "riscv,isa". These checks are only meaningful (or run) in M-Mode, in which case supports_extension() does not parse the devicetree anyway. Add support for the new property in U-Boot, prioritising it, before falling back to the, now deprecated, "riscv,isa" property if it is not present. Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>		2024-04-09 11:30:17 +08:00
..
andesv5	andes: cpu: Enable cache and TLB ECC support	2023-12-27 17:29:07 +08:00
cv1800b	riscv: cache: Implement dcache for cv1800b	2024-04-09 11:30:02 +08:00
fu540	riscv: Remove common.h usage	2023-10-24 16:34:45 -04:00
fu740	riscv: Remove common.h usage	2023-10-24 16:34:45 -04:00
generic	riscv: Remove common.h usage	2023-10-24 16:34:45 -04:00
jh7110	riscv: Remove common.h usage	2023-10-24 16:34:45 -04:00
cpu.c	riscv: support extension probing using riscv, isa-extensions	2024-04-09 11:30:17 +08:00
Makefile	riscv: Move trap handler codes to mtrap.S	2018-12-18 09:56:27 +08:00
mtrap.S	riscv: Align the trap handler to 64 bytes	2023-11-02 15:15:46 +08:00
start.S	riscv: add backtrace support	2024-04-09 11:29:38 +08:00
u-boot-spl.lds	riscv: Update alignment for some sections in linker scripts	2023-04-20 20:45:08 +08:00
u-boot.lds	riscv: Fix alignment of RELA sections in the linker scripts	2023-06-27 10:09:51 +08:00