diff options
| author | Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> | 2023-08-18 14:57:19 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-09-01 09:08:56 -0700 |
| commit | e021ae7f5145d46ab64cb058cbffda31059f37e5 (patch) | |
| tree | b10ab64313351d1f20264f317f64c585574470cc /arch/riscv/include | |
| parent | d6ca3a56f4f3e1d408397f1e309f7c57a6d01c38 (diff) | |
| download | linux-e021ae7f5145d46ab64cb058cbffda31059f37e5.tar.gz linux-e021ae7f5145d46ab64cb058cbffda31059f37e5.tar.bz2 linux-e021ae7f5145d46ab64cb058cbffda31059f37e5.zip | |
riscv: errata: Add Andes alternative ports
Add required ports of the Alternative scheme for Andes CPU cores.
I/O Coherence Port (IOCP) provides an AXI interface for connecting external
non-caching masters, such as DMA controllers. IOCP is a specification
option and is disabled on the Renesas RZ/Five SoC due to this reason cache
management needs a software workaround.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com> # tyre-kicking on a d1
Link: https://lore.kernel.org/r/20230818135723.80612-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/alternative.h | 3 | ||||
| -rw-r--r-- | arch/riscv/include/asm/errata_list.h | 5 |
2 files changed, 8 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/alternative.h b/arch/riscv/include/asm/alternative.h index 6a41537826a7..f6cfca939c92 100644 --- a/arch/riscv/include/asm/alternative.h +++ b/arch/riscv/include/asm/alternative.h @@ -46,6 +46,9 @@ struct alt_entry { u32 patch_id; /* The patch ID (erratum ID or cpufeature ID) */ }; +void andes_errata_patch_func(struct alt_entry *begin, struct alt_entry *end, + unsigned long archid, unsigned long impid, + unsigned int stage); void sifive_errata_patch_func(struct alt_entry *begin, struct alt_entry *end, unsigned long archid, unsigned long impid, unsigned int stage); diff --git a/arch/riscv/include/asm/errata_list.h b/arch/riscv/include/asm/errata_list.h index fb1a810f3d8c..e2ecd01bfac7 100644 --- a/arch/riscv/include/asm/errata_list.h +++ b/arch/riscv/include/asm/errata_list.h @@ -11,6 +11,11 @@ #include <asm/hwcap.h> #include <asm/vendorid_list.h> +#ifdef CONFIG_ERRATA_ANDES +#define ERRATA_ANDESTECH_NO_IOCP 0 +#define ERRATA_ANDESTECH_NUMBER 1 +#endif + #ifdef CONFIG_ERRATA_SIFIVE #define ERRATA_SIFIVE_CIP_453 0 #define ERRATA_SIFIVE_CIP_1200 1 |