183 lines
5.0 KiB
C
183 lines
5.0 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_TRAP_H__
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#define __SBI_TRAP_H__
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/* clang-format off */
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/** Index of zero member in sbi_trap_regs */
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#define SBI_TRAP_REGS_zero 0
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/** Index of ra member in sbi_trap_regs */
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#define SBI_TRAP_REGS_ra 1
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/** Index of sp member in sbi_trap_regs */
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#define SBI_TRAP_REGS_sp 2
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/** Index of gp member in sbi_trap_regs */
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#define SBI_TRAP_REGS_gp 3
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/** Index of tp member in sbi_trap_regs */
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#define SBI_TRAP_REGS_tp 4
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/** Index of t0 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_t0 5
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/** Index of t1 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_t1 6
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/** Index of t2 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_t2 7
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/** Index of s0 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s0 8
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/** Index of s1 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s1 9
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/** Index of a0 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_a0 10
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/** Index of a1 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_a1 11
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/** Index of a2 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_a2 12
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/** Index of a3 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_a3 13
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/** Index of a4 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_a4 14
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/** Index of a5 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_a5 15
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/** Index of a6 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_a6 16
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/** Index of a7 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_a7 17
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/** Index of s2 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s2 18
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/** Index of s3 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s3 19
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/** Index of s4 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s4 20
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/** Index of s5 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s5 21
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/** Index of s6 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s6 22
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/** Index of s7 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s7 23
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/** Index of s8 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s8 24
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/** Index of s9 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s9 25
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/** Index of s10 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s10 26
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/** Index of s11 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_s11 27
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/** Index of t3 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_t3 28
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/** Index of t4 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_t4 29
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/** Index of t5 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_t5 30
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/** Index of t6 member in sbi_trap_regs */
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#define SBI_TRAP_REGS_t6 31
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/** Index of mepc member in sbi_trap_regs */
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#define SBI_TRAP_REGS_mepc 32
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/** Index of mstatus member in sbi_trap_regs */
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#define SBI_TRAP_REGS_mstatus 33
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/** Index of mstatusH member in sbi_trap_regs */
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#define SBI_TRAP_REGS_mstatusH 34
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/** Last member index in sbi_trap_regs */
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#define SBI_TRAP_REGS_last 35
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/* clang-format on */
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/** Get offset of member with name 'x' in sbi_trap_regs */
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#define SBI_TRAP_REGS_OFFSET(x) ((SBI_TRAP_REGS_##x) * __SIZEOF_POINTER__)
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/** Size (in bytes) of sbi_trap_regs */
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#define SBI_TRAP_REGS_SIZE SBI_TRAP_REGS_OFFSET(last)
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#ifndef __ASSEMBLY__
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#include <sbi/sbi_types.h>
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/** Representation of register state at time of trap/interrupt */
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struct sbi_trap_regs {
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/** zero register state */
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unsigned long zero;
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/** ra register state */
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unsigned long ra;
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/** sp register state */
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unsigned long sp;
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/** gp register state */
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unsigned long gp;
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/** tp register state */
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unsigned long tp;
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/** t0 register state */
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unsigned long t0;
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/** t1 register state */
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unsigned long t1;
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/** t2 register state */
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unsigned long t2;
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/** s0 register state */
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unsigned long s0;
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/** s1 register state */
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unsigned long s1;
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/** a0 register state */
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unsigned long a0;
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/** a1 register state */
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unsigned long a1;
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/** a2 register state */
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unsigned long a2;
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/** a3 register state */
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unsigned long a3;
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/** a4 register state */
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unsigned long a4;
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/** a5 register state */
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unsigned long a5;
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/** a6 register state */
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unsigned long a6;
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/** a7 register state */
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unsigned long a7;
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/** s2 register state */
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unsigned long s2;
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/** s3 register state */
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unsigned long s3;
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/** s4 register state */
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unsigned long s4;
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/** s5 register state */
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unsigned long s5;
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/** s6 register state */
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unsigned long s6;
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/** s7 register state */
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unsigned long s7;
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/** s8 register state */
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unsigned long s8;
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/** s9 register state */
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unsigned long s9;
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/** s10 register state */
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unsigned long s10;
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/** s11 register state */
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unsigned long s11;
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/** t3 register state */
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unsigned long t3;
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/** t4 register state */
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unsigned long t4;
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/** t5 register state */
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unsigned long t5;
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/** t6 register state */
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unsigned long t6;
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/** mepc register state */
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unsigned long mepc;
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/** mstatus register state */
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unsigned long mstatus;
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/** mstatusH register state (only for 32-bit) */
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unsigned long mstatusH;
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} __packed;
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struct sbi_scratch;
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int sbi_trap_redirect(struct sbi_trap_regs *regs, 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, struct sbi_scratch *scratch);
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#endif
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#endif
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