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https://github.com/riscv-software-src/opensbi
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ecef14d573
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>
50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2024 Rivos Inc.
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*
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* Authors:
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* Clément Léger <cleger@rivosinc.com>
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*/
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#include <sbi/sbi_ecall.h>
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#include <sbi/sbi_ecall_interface.h>
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_fwft.h>
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#include <sbi/sbi_trap.h>
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static int sbi_ecall_fwft_handler(unsigned long extid, unsigned long funcid,
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struct sbi_trap_regs *regs,
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struct sbi_ecall_return *out)
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{
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int ret = 0;
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switch (funcid) {
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case SBI_EXT_FWFT_SET:
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ret = sbi_fwft_set(regs->a0, regs->a1, regs->a2);
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break;
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case SBI_EXT_FWFT_GET:
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ret = sbi_fwft_get(regs->a0, &out->value);
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break;
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default:
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ret = SBI_ENOTSUPP;
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break;
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}
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return ret;
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}
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struct sbi_ecall_extension ecall_fwft;
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static int sbi_ecall_fwft_register_extensions(void)
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{
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return sbi_ecall_register_extension(&ecall_fwft);
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}
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struct sbi_ecall_extension ecall_fwft = {
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.extid_start = SBI_EXT_FWFT,
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.extid_end = SBI_EXT_FWFT,
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.register_extensions = sbi_ecall_fwft_register_extensions,
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.handle = sbi_ecall_fwft_handler,
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};
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