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| author | Clément Léger <cleger@rivosinc.com> | 2024-06-19 11:42:42 +0200 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2024-06-19 18:15:28 +0530 |
| commit | ecef14d5732f837cbfa4a8cefa8fed7953e7abfb (patch) | |
| tree | 1bb751958253d0ecd8f11532b8c3abbca96e146e | |
| parent | e9ee9678ba509f42a93c8de518710c225c0499f5 (diff) | |
| download | opensbi-ecef14d5732f837cbfa4a8cefa8fed7953e7abfb.zip opensbi-ecef14d5732f837cbfa4a8cefa8fed7953e7abfb.tar.gz opensbi-ecef14d5732f837cbfa4a8cefa8fed7953e7abfb.tar.bz2 | |
The SBI FWFT extension defines a set of function that can be called
to control the configuration of some platform features (misaligned
trap delegation, etc). This patch implements sbi_fwft_set() and
sbi_fwft_get() as defined in the specification [1].
Link: https://lists.riscv.org/g/tech-prs/message/924 [1]
Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
| -rw-r--r-- | lib/sbi/Kconfig | 4 | ||||
| -rw-r--r-- | lib/sbi/objects.mk | 3 | ||||
| -rw-r--r-- | lib/sbi/sbi_ecall_fwft.c | 49 |
3 files changed, 56 insertions, 0 deletions
diff --git a/lib/sbi/Kconfig b/lib/sbi/Kconfig index cc8e031..6cf54ce 100644 --- a/lib/sbi/Kconfig +++ b/lib/sbi/Kconfig @@ -38,6 +38,10 @@ config SBI_ECALL_CPPC bool "CPPC extension" default y +config SBI_ECALL_FWFT + bool "Firmware Feature extension" + default y + config SBI_ECALL_LEGACY bool "SBI v0.1 legacy extensions" default y diff --git a/lib/sbi/objects.mk b/lib/sbi/objects.mk index 221e72c..211abad 100644 --- a/lib/sbi/objects.mk +++ b/lib/sbi/objects.mk @@ -46,6 +46,9 @@ libsbi-objs-$(CONFIG_SBI_ECALL_DBCN) += sbi_ecall_dbcn.o carray-sbi_ecall_exts-$(CONFIG_SBI_ECALL_CPPC) += ecall_cppc libsbi-objs-$(CONFIG_SBI_ECALL_CPPC) += sbi_ecall_cppc.o +carray-sbi_ecall_exts-$(CONFIG_SBI_ECALL_FWFT) += ecall_fwft +libsbi-objs-$(CONFIG_SBI_ECALL_FWFT) += sbi_ecall_fwft.o + carray-sbi_ecall_exts-$(CONFIG_SBI_ECALL_LEGACY) += ecall_legacy libsbi-objs-$(CONFIG_SBI_ECALL_LEGACY) += sbi_ecall_legacy.o diff --git a/lib/sbi/sbi_ecall_fwft.c b/lib/sbi/sbi_ecall_fwft.c new file mode 100644 index 0000000..267cbab --- /dev/null +++ b/lib/sbi/sbi_ecall_fwft.c @@ -0,0 +1,49 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2024 Rivos Inc. + * + * Authors: + * Clément Léger <cleger@rivosinc.com> + */ + +#include <sbi/sbi_ecall.h> +#include <sbi/sbi_ecall_interface.h> +#include <sbi/sbi_error.h> +#include <sbi/sbi_fwft.h> +#include <sbi/sbi_trap.h> + +static int sbi_ecall_fwft_handler(unsigned long extid, unsigned long funcid, + struct sbi_trap_regs *regs, + struct sbi_ecall_return *out) +{ + int ret = 0; + + switch (funcid) { + case SBI_EXT_FWFT_SET: + ret = sbi_fwft_set(regs->a0, regs->a1, regs->a2); + break; + case SBI_EXT_FWFT_GET: + ret = sbi_fwft_get(regs->a0, &out->value); + break; + default: + ret = SBI_ENOTSUPP; + break; + } + + return ret; +} + +struct sbi_ecall_extension ecall_fwft; + +static int sbi_ecall_fwft_register_extensions(void) +{ + return sbi_ecall_register_extension(&ecall_fwft); +} + +struct sbi_ecall_extension ecall_fwft = { + .extid_start = SBI_EXT_FWFT, + .extid_end = SBI_EXT_FWFT, + .register_extensions = sbi_ecall_fwft_register_extensions, + .handle = sbi_ecall_fwft_handler, +}; |