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https://github.com/riscv-software-src/opensbi.git
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5959312a5c
Currently, we fail with error SBI_ENOTSUPP when we are not able to handle illegal instruction trap. Instead, we should just redirect illegal instruction trap to S-mode when not handled. This redirection of illegal instruction trap will help lazy save/restore of floating point registers to work correctly in Linux kernel. Signed-off-by: Anup Patel <anup.patel@wdc.com>
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
/*
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* Copyright (c) 2018 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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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#ifndef __SBI_TRAP_H__
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#define __SBI_TRAP_H__
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#include <sbi/sbi_types.h>
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struct sbi_trap_regs {
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unsigned long zero;
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unsigned long ra;
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unsigned long sp;
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unsigned long gp;
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unsigned long tp;
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unsigned long t0;
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unsigned long t1;
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unsigned long t2;
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unsigned long s0;
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unsigned long s1;
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unsigned long a0;
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unsigned long a1;
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unsigned long a2;
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unsigned long a3;
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unsigned long a4;
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unsigned long a5;
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unsigned long a6;
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unsigned long a7;
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unsigned long s2;
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unsigned long s3;
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unsigned long s4;
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unsigned long s5;
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unsigned long s6;
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unsigned long s7;
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unsigned long s8;
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unsigned long s9;
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unsigned long s10;
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unsigned long s11;
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unsigned long t3;
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unsigned long t4;
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unsigned long t5;
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unsigned long t6;
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unsigned long mepc;
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unsigned long mstatus;
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} __attribute__((packed));
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struct sbi_scratch;
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int sbi_trap_redirect(struct sbi_trap_regs *regs,
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struct sbi_scratch *scratch,
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ulong epc, ulong cause, ulong tval);
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void sbi_trap_handler(struct sbi_trap_regs *regs,
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struct sbi_scratch *scratch);
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#endif
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