forked from Mirrors/opensbi
37923c4a66
This patch extends our SBI ecall implementation to allow dynamic registration of various SBI extensions. Using this dynamic registration we can break-up SBI ecall implementation into multiple files and even register experimental/custom SBI extensions from platform code. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 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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*/
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#ifndef __SBI_ECALL_H__
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#define __SBI_ECALL_H__
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#include <sbi/sbi_types.h>
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#include <sbi/sbi_list.h>
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struct sbi_trap_regs;
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struct sbi_trap_info;
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struct sbi_scratch;
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struct sbi_ecall_extension {
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struct sbi_dlist head;
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unsigned long extid_start;
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unsigned long extid_end;
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int (* probe)(struct sbi_scratch *scratch,
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unsigned long extid, unsigned long *out_val);
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int (* handle)(struct sbi_scratch *scratch,
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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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u16 sbi_ecall_version_major(void);
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u16 sbi_ecall_version_minor(void);
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struct sbi_ecall_extension *sbi_ecall_find_extension(unsigned long extid);
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int sbi_ecall_register_extension(struct sbi_ecall_extension *ext);
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void sbi_ecall_unregister_extension(struct sbi_ecall_extension *ext);
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int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs,
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struct sbi_scratch *scratch);
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int sbi_ecall_init(void);
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#endif
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