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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2020 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Anup Patel <anup.patel@wdc.com>
- * Atish Patra <atish.patra@wdc.com>
- */
- #include <sbi/sbi_ecall.h>
- #include <sbi/sbi_ecall_interface.h>
- #include <sbi/sbi_error.h>
- #include <sbi/sbi_trap.h>
- #include <sbi/sbi_version.h>
- #include <sbi/riscv_asm.h>
- static int sbi_ecall_base_probe(unsigned long extid, unsigned long *out_val)
- {
- struct sbi_ecall_extension *ext;
- ext = sbi_ecall_find_extension(extid);
- if (!ext) {
- *out_val = 0;
- return 0;
- }
- if (ext->probe)
- return ext->probe(extid, out_val);
- *out_val = 1;
- return 0;
- }
- static int sbi_ecall_base_handler(unsigned long extid, unsigned long funcid,
- const struct sbi_trap_regs *regs,
- unsigned long *out_val,
- struct sbi_trap_info *out_trap)
- {
- int ret = 0;
- switch (funcid) {
- case SBI_EXT_BASE_GET_SPEC_VERSION:
- *out_val = (SBI_ECALL_VERSION_MAJOR <<
- SBI_SPEC_VERSION_MAJOR_OFFSET) &
- (SBI_SPEC_VERSION_MAJOR_MASK <<
- SBI_SPEC_VERSION_MAJOR_OFFSET);
- *out_val = *out_val | SBI_ECALL_VERSION_MINOR;
- break;
- case SBI_EXT_BASE_GET_IMP_ID:
- *out_val = sbi_ecall_get_impid();
- break;
- case SBI_EXT_BASE_GET_IMP_VERSION:
- *out_val = OPENSBI_VERSION;
- break;
- case SBI_EXT_BASE_GET_MVENDORID:
- *out_val = csr_read(CSR_MVENDORID);
- break;
- case SBI_EXT_BASE_GET_MARCHID:
- *out_val = csr_read(CSR_MARCHID);
- break;
- case SBI_EXT_BASE_GET_MIMPID:
- *out_val = csr_read(CSR_MIMPID);
- break;
- case SBI_EXT_BASE_PROBE_EXT:
- ret = sbi_ecall_base_probe(regs->a0, out_val);
- break;
- default:
- ret = SBI_ENOTSUPP;
- }
- return ret;
- }
- struct sbi_ecall_extension ecall_base = {
- .extid_start = SBI_EXT_BASE,
- .extid_end = SBI_EXT_BASE,
- .handle = sbi_ecall_base_handler,
- };
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