1 // Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef __RVRUNTIME_FRAMES_H__ 16 #define __RVRUNTIME_FRAMES_H__ 17 18 /* Align a value up to nearest n-byte boundary, where n is a power of 2. */ 19 #define ALIGNUP(n, val) (((val) + (n) - 1) & -(n)) 20 21 #ifdef STRUCT_BEGIN 22 #undef STRUCT_BEGIN 23 #undef STRUCT_FIELD 24 #undef STRUCT_AFIELD 25 #undef STRUCT_END 26 #endif 27 28 #if defined(_ASMLANGUAGE) || defined(__ASSEMBLER__) 29 #define STRUCT_BEGIN .pushsection .text; .struct 0 30 #define STRUCT_FIELD(ctype,size,asname,name) asname: .space size 31 #define STRUCT_AFIELD(ctype,size,asname,name,n) asname: .space (size)*(n) 32 #define STRUCT_END(sname) sname##Size:; .popsection 33 #else 34 #define STRUCT_BEGIN typedef struct { 35 #define STRUCT_FIELD(ctype,size,asname,name) ctype name; 36 #define STRUCT_AFIELD(ctype,size,asname,name,n) ctype name[n]; 37 #define STRUCT_END(sname) } sname; 38 #endif 39 40 /* 41 ------------------------------------------------------------------------------- 42 INTERRUPT/EXCEPTION STACK FRAME FOR A EXCEPTION OR NESTED INTERRUPT 43 ------------------------------------------------------------------------------- 44 */ 45 STRUCT_BEGIN 46 STRUCT_FIELD (long, 4, RV_STK_MEPC, mepc) /* Machine Exception Program Counter */ 47 STRUCT_FIELD (long, 4, RV_STK_RA, ra) /* Return address */ 48 STRUCT_FIELD (long, 4, RV_STK_SP, sp) /* Stack pointer */ 49 STRUCT_FIELD (long, 4, RV_STK_GP, gp) /* Global pointer */ 50 STRUCT_FIELD (long, 4, RV_STK_TP, tp) /* Thread pointer */ 51 STRUCT_FIELD (long, 4, RV_STK_T0, t0) /* Temporary/alternate link register */ 52 STRUCT_FIELD (long, 4, RV_STK_T1, t1) /* t1-2: Temporaries */ 53 STRUCT_FIELD (long, 4, RV_STK_T2, t2) 54 STRUCT_FIELD (long, 4, RV_STK_S0, s0) /* Saved register/frame pointer */ 55 STRUCT_FIELD (long, 4, RV_STK_S1, s1) /* Saved register */ 56 STRUCT_FIELD (long, 4, RV_STK_A0, a0) /* a0-1: Function arguments/return address */ 57 STRUCT_FIELD (long, 4, RV_STK_A1, a1) 58 STRUCT_FIELD (long, 4, RV_STK_A2, a2) /* a2-7: Function arguments */ 59 STRUCT_FIELD (long, 4, RV_STK_A3, a3) 60 STRUCT_FIELD (long, 4, RV_STK_A4, a4) 61 STRUCT_FIELD (long, 4, RV_STK_A5, a5) 62 STRUCT_FIELD (long, 4, RV_STK_A6, a6) 63 STRUCT_FIELD (long, 4, RV_STK_A7, a7) 64 STRUCT_FIELD (long, 4, RV_STK_S2, s2) /* s2-11: Saved registers */ 65 STRUCT_FIELD (long, 4, RV_STK_S3, s3) 66 STRUCT_FIELD (long, 4, RV_STK_S4, s4) 67 STRUCT_FIELD (long, 4, RV_STK_S5, s5) 68 STRUCT_FIELD (long, 4, RV_STK_S6, s6) 69 STRUCT_FIELD (long, 4, RV_STK_S7, s7) 70 STRUCT_FIELD (long, 4, RV_STK_S8, s8) 71 STRUCT_FIELD (long, 4, RV_STK_S9, s9) 72 STRUCT_FIELD (long, 4, RV_STK_S10, s10) 73 STRUCT_FIELD (long, 4, RV_STK_S11, s11) 74 STRUCT_FIELD (long, 4, RV_STK_T3, t3) /* t3-6: Temporaries */ 75 STRUCT_FIELD (long, 4, RV_STK_T4, t4) 76 STRUCT_FIELD (long, 4, RV_STK_T5, t5) 77 STRUCT_FIELD (long, 4, RV_STK_T6, t6) 78 STRUCT_FIELD (long, 4, RV_STK_MSTATUS, mstatus) /* Machine Status */ 79 STRUCT_FIELD (long, 4, RV_STK_MTVEC, mtvec) /* Machine Trap-Vector Base Address */ 80 STRUCT_FIELD (long, 4, RV_STK_MCAUSE, mcause) /* Machine Trap Cause */ 81 STRUCT_FIELD (long, 4, RV_STK_MTVAL, mtval) /* Machine Trap Value */ 82 STRUCT_FIELD (long, 4, RV_STK_MHARTID, mhartid) /* Hardware Thread ID in machine mode */ 83 STRUCT_END(RvExcFrame) 84 85 #if defined(_ASMLANGUAGE) || defined(__ASSEMBLER__) 86 #define RV_STK_SZ1 RvExcFrameSize 87 #else 88 #define RV_STK_SZ1 sizeof(RvExcFrame) 89 #endif 90 91 /* 92 * Exception stack frame size, after align up to 16 bytes boundary 93 */ 94 #define RV_STK_FRMSZ (ALIGNUP(0x10, RV_STK_SZ1)) 95 96 #endif /* #ifndef __RVRUNTIME_FRAMES_H__ */ 97
