forked from Mirrors/opensbi
7487116b41
We remove mcause, scratch and hartid parameters from various functions for ecall handling because we can always get current HART id and current scratch pointer using just one CSR access. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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* Atish Patra <atish.patra@wdc.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_version.h>
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#include <sbi/riscv_asm.h>
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static int sbi_ecall_base_probe(unsigned long extid, unsigned long *out_val)
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{
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struct sbi_ecall_extension *ext;
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ext = sbi_ecall_find_extension(extid);
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if (!ext) {
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*out_val = 0;
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return 0;
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}
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if (ext->probe)
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return ext->probe(extid, out_val);
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*out_val = 1;
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return 0;
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}
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static int sbi_ecall_base_handler(unsigned long extid, unsigned long funcid,
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unsigned long *args, unsigned long *out_val,
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struct sbi_trap_info *out_trap)
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{
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int ret = 0;
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switch (funcid) {
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case SBI_EXT_BASE_GET_SPEC_VERSION:
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*out_val = (SBI_ECALL_VERSION_MAJOR <<
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SBI_SPEC_VERSION_MAJOR_OFFSET) &
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(SBI_SPEC_VERSION_MAJOR_MASK <<
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SBI_SPEC_VERSION_MAJOR_OFFSET);
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*out_val = *out_val | SBI_ECALL_VERSION_MINOR;
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break;
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case SBI_EXT_BASE_GET_IMP_ID:
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*out_val = SBI_OPENSBI_IMPID;
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break;
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case SBI_EXT_BASE_GET_IMP_VERSION:
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*out_val = OPENSBI_VERSION;
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break;
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case SBI_EXT_BASE_GET_MVENDORID:
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*out_val = csr_read(CSR_MVENDORID);
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break;
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case SBI_EXT_BASE_GET_MARCHID:
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*out_val = csr_read(CSR_MARCHID);
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break;
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case SBI_EXT_BASE_GET_MIMPID:
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*out_val = csr_read(CSR_MIMPID);
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break;
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case SBI_EXT_BASE_PROBE_EXT:
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ret = sbi_ecall_base_probe(args[0], out_val);
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break;
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default:
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ret = SBI_ENOTSUPP;
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}
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return ret;
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}
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struct sbi_ecall_extension ecall_base = {
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.extid_start = SBI_EXT_BASE,
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.extid_end = SBI_EXT_BASE,
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.handle = sbi_ecall_base_handler,
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};
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