1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2017 Red Hat Inc 4 * 5 * Authors: 6 * David Hildenbrand <david@redhat.com> 7 */ 8 #ifndef _ASMS390X_IRQ_H_ 9 #define _ASMS390X_IRQ_H_ 10 #include <asm/arch_def.h> 11 12 #define EXT_IRQ_EMERGENCY_SIG 0x1201 13 #define EXT_IRQ_EXTERNAL_CALL 0x1202 14 #define EXT_IRQ_SERVICE_SIG 0x2401 15 16 #define TEID_ASCE_PRIMARY 0 17 #define TEID_ASCE_AR 1 18 #define TEID_ASCE_SECONDARY 2 19 #define TEID_ASCE_HOME 3 20 21 union teid { 22 unsigned long val; 23 union { 24 /* common fields DAT exc & protection exc */ 25 struct { 26 uint64_t addr : 52 - 0; 27 uint64_t acc_exc_fetch_store : 54 - 52; 28 uint64_t side_effect_acc : 55 - 54; 29 uint64_t /* reserved */ : 62 - 55; 30 uint64_t asce_id : 64 - 62; 31 }; 32 /* DAT exc */ 33 struct { 34 uint64_t /* pad */ : 61 - 0; 35 uint64_t dat_move_page : 62 - 61; 36 }; 37 /* suppression on protection */ 38 struct { 39 uint64_t /* pad */ : 60 - 0; 40 uint64_t sop_acc_list : 61 - 60; 41 uint64_t sop_teid_predictable : 62 - 61; 42 }; 43 /* enhanced suppression on protection 2 */ 44 struct { 45 uint64_t /* pad */ : 56 - 0; 46 uint64_t esop2_prot_code_0 : 57 - 56; 47 uint64_t /* pad */ : 60 - 57; 48 uint64_t esop2_prot_code_1 : 61 - 60; 49 uint64_t esop2_prot_code_2 : 62 - 61; 50 }; 51 }; 52 }; 53 54 enum prot_code { 55 PROT_KEY_OR_LAP, 56 PROT_DAT, 57 PROT_KEY, 58 PROT_ACC_LIST, 59 PROT_LAP, 60 PROT_IEP, 61 PROT_NUM_CODES /* Must always be last */ 62 }; 63 64 static inline enum prot_code teid_esop2_prot_code(union teid teid) 65 { 66 int code = (teid.esop2_prot_code_0 << 2 | 67 teid.esop2_prot_code_1 << 1 | 68 teid.esop2_prot_code_2); 69 70 assert(code < PROT_NUM_CODES); 71 return (enum prot_code)code; 72 } 73 74 void register_pgm_cleanup_func(void (*f)(struct stack_frame_int *)); 75 void register_ext_cleanup_func(void (*f)(struct stack_frame_int *)); 76 void handle_pgm_int(struct stack_frame_int *stack); 77 void handle_ext_int(struct stack_frame_int *stack); 78 void handle_mcck_int(void); 79 void handle_io_int(void); 80 void handle_svc_int(void); 81 void expect_pgm_int(void); 82 void expect_ext_int(void); 83 uint16_t clear_pgm_int(void); 84 void check_pgm_int_code(uint16_t code); 85 86 void irq_set_dat_mode(bool use_dat, enum address_space as); 87 88 /* Activate low-address protection */ 89 static inline void low_prot_enable(void) 90 { 91 ctl_set_bit(0, CTL0_LOW_ADDR_PROT); 92 } 93 94 /* Disable low-address protection */ 95 static inline void low_prot_disable(void) 96 { 97 ctl_clear_bit(0, CTL0_LOW_ADDR_PROT); 98 } 99 100 /** 101 * read_pgm_int_code - Get the program interruption code of the last pgm int 102 * on the current CPU. 103 * 104 * This is similar to clear_pgm_int(), except that it doesn't clear the 105 * interruption information from lowcore. 106 * 107 * Return: 0 when none occurred. 108 */ 109 static inline uint16_t read_pgm_int_code(void) 110 { 111 return lowcore.pgm_int_code; 112 } 113 114 #endif 115