diff options
Diffstat (limited to 'roms/opensbi/include/sbi/sbi_trap.h')
| -rw-r--r-- | roms/opensbi/include/sbi/sbi_trap.h | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/roms/opensbi/include/sbi/sbi_trap.h b/roms/opensbi/include/sbi/sbi_trap.h new file mode 100644 index 000000000..5fb94f980 --- /dev/null +++ b/roms/opensbi/include/sbi/sbi_trap.h @@ -0,0 +1,214 @@ +/* + * 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 __ASSEMBLY__ + +#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_handler(struct sbi_trap_regs *regs); + +void __noreturn sbi_trap_exit(const struct sbi_trap_regs *regs); + +#endif + +#endif |