1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Private structs/constants for PARISC IOSAPIC support 4 * 5 * Copyright (C) 2000 Hewlett Packard (Grant Grundler) 6 * Copyright (C) 2000,2003 Grant Grundler (grundler at parisc-linux.org) 7 * Copyright (C) 2002 Matthew Wilcox (willy at parisc-linux.org) 8 */ 9 10 /* 11 ** This file is private to iosapic driver. 12 ** If stuff needs to be used by another driver, move it to a common file. 13 ** 14 ** WARNING: fields most data structures here are ordered to make sure 15 ** they pack nicely for 64-bit compilation. (ie sizeof(long) == 8) 16 */ 17 18 19 /* 20 ** Interrupt Routing Stuff 21 ** ----------------------- 22 ** The interrupt routing table consists of entries derived from 23 ** MP Specification Draft 1.5. There is one interrupt routing 24 ** table per cell. N- and L-class consist of a single cell. 25 */ 26 struct irt_entry { 27 28 /* Entry Type 139 identifies an I/O SAPIC interrupt entry */ 29 u8 entry_type; 30 31 /* Entry Length 16 indicates entry is 16 bytes long */ 32 u8 entry_length; 33 34 /* 35 ** Interrupt Type of 0 indicates a vectored interrupt, 36 ** all other values are reserved 37 */ 38 u8 interrupt_type; 39 40 /* 41 ** PO and EL 42 ** Polarity of SAPIC I/O input signals: 43 ** 00 = Reserved 44 ** 01 = Active high 45 ** 10 = Reserved 46 ** 11 = Active low 47 ** Trigger mode of SAPIC I/O input signals: 48 ** 00 = Reserved 49 ** 01 = Edge-triggered 50 ** 10 = Reserved 51 ** 11 = Level-triggered 52 */ 53 u8 polarity_trigger; 54 55 /* 56 ** IRQ and DEVNO 57 ** irq identifies PCI interrupt signal where 58 ** 0x0 corresponds to INT_A#, 59 ** 0x1 corresponds to INT_B#, 60 ** 0x2 corresponds to INT_C# 61 ** 0x3 corresponds to INT_D# 62 ** PCI device number where interrupt originates 63 */ 64 u8 src_bus_irq_devno; 65 66 /* Source Bus ID identifies the bus where interrupt signal comes from */ 67 u8 src_bus_id; 68 69 /* 70 ** Segment ID is unique across a protection domain and 71 ** identifies a segment of PCI buses (reserved in 72 ** MP Specification Draft 1.5) 73 */ 74 u8 src_seg_id; 75 76 /* 77 ** Destination I/O SAPIC INTIN# identifies the INTIN n pin 78 ** to which the signal is connected 79 */ 80 u8 dest_iosapic_intin; 81 82 /* 83 ** Destination I/O SAPIC Address identifies the I/O SAPIC 84 ** to which the signal is connected 85 */ 86 u64 dest_iosapic_addr; 87 }; 88 89 #define IRT_IOSAPIC_TYPE 139 90 #define IRT_IOSAPIC_LENGTH 16 91 92 #define IRT_VECTORED_INTR 0 93 94 #define IRT_PO_MASK 0x3 95 #define IRT_ACTIVE_HI 1 96 #define IRT_ACTIVE_LO 3 97 98 #define IRT_EL_MASK 0x3 99 #define IRT_EL_SHIFT 2 100 #define IRT_EDGE_TRIG 1 101 #define IRT_LEVEL_TRIG 3 102 103 #define IRT_IRQ_MASK 0x3 104 #define IRT_DEV_MASK 0x1f 105 #define IRT_DEV_SHIFT 2 106 107 #define IRT_IRQ_DEVNO_MASK ((IRT_DEV_MASK << IRT_DEV_SHIFT) | IRT_IRQ_MASK) 108 109 #ifdef SUPPORT_MULTI_CELL 110 struct iosapic_irt { 111 struct iosapic_irt *irt_next; /* next routing table */ 112 struct irt_entry *irt_base; /* intr routing table address */ 113 size_t irte_count; /* number of entries in the table */ 114 size_t irte_size; /* size (bytes) of each entry */ 115 }; 116 #endif 117 118 struct vector_info { 119 struct iosapic_info *iosapic; /* I/O SAPIC this vector is on */ 120 struct irt_entry *irte; /* IRT entry */ 121 __le32 __iomem *eoi_addr; /* precalculate EOI reg address */ 122 __le32 eoi_data; /* IA64: ? PA: swapped txn_data */ 123 int txn_irq; /* virtual IRQ number for processor */ 124 ulong txn_addr; /* IA64: id_eid PA: partial HPA */ 125 u32 txn_data; /* CPU interrupt bit */ 126 u8 status; /* status/flags */ 127 u8 irqline; /* INTINn(IRQ) */ 128 }; 129 130 131 struct iosapic_info { 132 struct iosapic_info * isi_next; /* list of I/O SAPIC */ 133 void __iomem * addr; /* remapped address */ 134 unsigned long isi_hpa; /* physical base address */ 135 struct vector_info * isi_vector; /* IRdT (IRQ line) array */ 136 int isi_num_vectors; /* size of IRdT array */ 137 int isi_status; /* status/flags */ 138 unsigned int isi_version; /* DEBUG: data fr version reg */ 139 }; 140 141 142 143 #ifdef __IA64__ 144 /* 145 ** PA risc does NOT have any local sapics. IA64 does. 146 ** PIB (Processor Interrupt Block) is handled by Astro or Dew (Stretch CEC). 147 ** 148 ** PA: Get id_eid from IRT and hardcode PIB to 0xfeeNNNN0 149 ** Emulate the data on PAT platforms. 150 */ 151 struct local_sapic_info { 152 struct local_sapic_info *lsi_next; /* point to next CPU info */ 153 int *lsi_cpu_id; /* point to logical CPU id */ 154 unsigned long *lsi_id_eid; /* point to IA-64 CPU id */ 155 int *lsi_status; /* point to CPU status */ 156 void *lsi_private; /* point to special info */ 157 }; 158 159 /* 160 ** "root" data structure which ties everything together. 161 ** Should always be able to start with sapic_root and locate 162 ** the desired information. 163 */ 164 struct sapic_info { 165 struct sapic_info *si_next; /* info is per cell */ 166 int si_cellid; /* cell id */ 167 unsigned int si_status; /* status */ 168 char *si_pib_base; /* intr blk base address */ 169 local_sapic_info_t *si_local_info; 170 io_sapic_info_t *si_io_info; 171 extint_info_t *si_extint_info;/* External Intr info */ 172 }; 173 #endif 174 175