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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#ifndef __SBI_TRAP_H__
#define __SBI_TRAP_H__
/* clang-format off */
/** Index of zero member in sbi_trap_regs */
#define SBI_TRAP_REGS_zero 0
/** Index of ra member in sbi_trap_regs */
#define SBI_TRAP_REGS_ra 1
/** Index of sp member in sbi_trap_regs */
#define SBI_TRAP_REGS_sp 2
/** Index of gp member in sbi_trap_regs */
#define SBI_TRAP_REGS_gp 3
/** Index of tp member in sbi_trap_regs */
#define SBI_TRAP_REGS_tp 4
/** Index of t0 member in sbi_trap_regs */
#define SBI_TRAP_REGS_t0 5
/** Index of t1 member in sbi_trap_regs */
#define SBI_TRAP_REGS_t1 6
/** Index of t2 member in sbi_trap_regs */
#define SBI_TRAP_REGS_t2 7
/** Index of s0 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s0 8
/** Index of s1 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s1 9
/** Index of a0 member in sbi_trap_regs */
#define SBI_TRAP_REGS_a0 10
/** Index of a1 member in sbi_trap_regs */
#define SBI_TRAP_REGS_a1 11
/** Index of a2 member in sbi_trap_regs */
#define SBI_TRAP_REGS_a2 12
/** Index of a3 member in sbi_trap_regs */
#define SBI_TRAP_REGS_a3 13
/** Index of a4 member in sbi_trap_regs */
#define SBI_TRAP_REGS_a4 14
/** Index of a5 member in sbi_trap_regs */
#define SBI_TRAP_REGS_a5 15
/** Index of a6 member in sbi_trap_regs */
#define SBI_TRAP_REGS_a6 16
/** Index of a7 member in sbi_trap_regs */
#define SBI_TRAP_REGS_a7 17
/** Index of s2 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s2 18
/** Index of s3 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s3 19
/** Index of s4 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s4 20
/** Index of s5 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s5 21
/** Index of s6 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s6 22
/** Index of s7 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s7 23
/** Index of s8 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s8 24
/** Index of s9 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s9 25
/** Index of s10 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s10 26
/** Index of s11 member in sbi_trap_regs */
#define SBI_TRAP_REGS_s11 27
/** Index of t3 member in sbi_trap_regs */
#define SBI_TRAP_REGS_t3 28
/** Index of t4 member in sbi_trap_regs */
#define SBI_TRAP_REGS_t4 29
/** Index of t5 member in sbi_trap_regs */
#define SBI_TRAP_REGS_t5 30
/** Index of t6 member in sbi_trap_regs */
#define SBI_TRAP_REGS_t6 31
/** Index of mepc member in sbi_trap_regs */
#define SBI_TRAP_REGS_mepc 32
/** Index of mstatus member in sbi_trap_regs */
#define SBI_TRAP_REGS_mstatus 33
/** Index of mstatusH member in sbi_trap_regs */
#define SBI_TRAP_REGS_mstatusH 34
/** Last member index in sbi_trap_regs */
#define SBI_TRAP_REGS_last 35
/** Index of epc member in sbi_trap_info */
#define SBI_TRAP_INFO_epc 0
/** Index of cause member in sbi_trap_info */
#define SBI_TRAP_INFO_cause 1
/** Index of tval member in sbi_trap_info */
#define SBI_TRAP_INFO_tval 2
/** Index of tval2 member in sbi_trap_info */
#define SBI_TRAP_INFO_tval2 3
/** Index of tinst member in sbi_trap_info */
#define SBI_TRAP_INFO_tinst 4
/** Last member index in sbi_trap_info */
#define SBI_TRAP_INFO_last 5
/* clang-format on */
/** Get offset of member with name 'x' in sbi_trap_regs */
#define SBI_TRAP_REGS_OFFSET(x) ((SBI_TRAP_REGS_##x) * __SIZEOF_POINTER__)
/** Size (in bytes) of sbi_trap_regs */
#define SBI_TRAP_REGS_SIZE SBI_TRAP_REGS_OFFSET(last)
/** Get offset of member with name 'x' in sbi_trap_info */
#define SBI_TRAP_INFO_OFFSET(x) ((SBI_TRAP_INFO_##x) * __SIZEOF_POINTER__)
/** Size (in bytes) of sbi_trap_info */
#define SBI_TRAP_INFO_SIZE SBI_TRAP_INFO_OFFSET(last)
#ifndef __ASSEMBLER__
#include <sbi/sbi_types.h>
/** Representation of register state at time of trap/interrupt */
struct sbi_trap_regs {
/** zero register state */
unsigned long zero;
/** ra register state */
unsigned long ra;
/** sp register state */
unsigned long sp;
/** gp register state */
unsigned long gp;
/** tp register state */
unsigned long tp;
/** t0 register state */
unsigned long t0;
/** t1 register state */
unsigned long t1;
/** t2 register state */
unsigned long t2;
/** s0 register state */
unsigned long s0;
/** s1 register state */
unsigned long s1;
/** a0 register state */
unsigned long a0;
/** a1 register state */
unsigned long a1;
/** a2 register state */
unsigned long a2;
/** a3 register state */
unsigned long a3;
/** a4 register state */
unsigned long a4;
/** a5 register state */
unsigned long a5;
/** a6 register state */
unsigned long a6;
/** a7 register state */
unsigned long a7;
/** s2 register state */
unsigned long s2;
/** s3 register state */
unsigned long s3;
/** s4 register state */
unsigned long s4;
/** s5 register state */
unsigned long s5;
/** s6 register state */
unsigned long s6;
/** s7 register state */
unsigned long s7;
/** s8 register state */
unsigned long s8;
/** s9 register state */
unsigned long s9;
/** s10 register state */
unsigned long s10;
/** s11 register state */
unsigned long s11;
/** t3 register state */
unsigned long t3;
/** t4 register state */
unsigned long t4;
/** t5 register state */
unsigned long t5;
/** t6 register state */
unsigned long t6;
/** mepc register state */
unsigned long mepc;
/** mstatus register state */
unsigned long mstatus;
/** mstatusH register state (only for 32-bit) */
unsigned long mstatusH;
};
/** Representation of trap details */
struct sbi_trap_info {
/** epc Trap program counter */
unsigned long epc;
/** cause Trap exception cause */
unsigned long cause;
/** tval Trap value */
unsigned long tval;
/** tval2 Trap value 2 */
unsigned long tval2;
/** tinst Trap instruction */
unsigned long tinst;
};
int sbi_trap_redirect(struct sbi_trap_regs *regs,
struct sbi_trap_info *trap);
void sbi_trap_set_external_irqfn(int (*fn)(struct sbi_trap_regs *regs));
struct sbi_trap_regs *sbi_trap_handler(struct sbi_trap_regs *regs);
void __noreturn sbi_trap_exit(const struct sbi_trap_regs *regs);
#endif
#endif
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