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Diffstat (limited to 'drivers/parisc/iosapic_private.h')
| -rw-r--r-- | drivers/parisc/iosapic_private.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/parisc/iosapic_private.h b/drivers/parisc/iosapic_private.h new file mode 100644 index 000000000..bd8ff4016 --- /dev/null +++ b/drivers/parisc/iosapic_private.h @@ -0,0 +1,174 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Private structs/constants for PARISC IOSAPIC support + * + * Copyright (C) 2000 Hewlett Packard (Grant Grundler) + * Copyright (C) 2000,2003 Grant Grundler (grundler at parisc-linux.org) + * Copyright (C) 2002 Matthew Wilcox (willy at parisc-linux.org) + */ + +/* +** This file is private to iosapic driver. +** If stuff needs to be used by another driver, move it to a common file. +** +** WARNING: fields most data structures here are ordered to make sure +** they pack nicely for 64-bit compilation. (ie sizeof(long) == 8) +*/ + + +/* +** Interrupt Routing Stuff +** ----------------------- +** The interrupt routing table consists of entries derived from +** MP Specification Draft 1.5. There is one interrupt routing +** table per cell. N- and L-class consist of a single cell. +*/ +struct irt_entry { + + /* Entry Type 139 identifies an I/O SAPIC interrupt entry */ + u8 entry_type; + + /* Entry Length 16 indicates entry is 16 bytes long */ + u8 entry_length; + + /* + ** Interrupt Type of 0 indicates a vectored interrupt, + ** all other values are reserved + */ + u8 interrupt_type; + + /* + ** PO and EL + ** Polarity of SAPIC I/O input signals: + ** 00 = Reserved + ** 01 = Active high + ** 10 = Reserved + ** 11 = Active low + ** Trigger mode of SAPIC I/O input signals: + ** 00 = Reserved + ** 01 = Edge-triggered + ** 10 = Reserved + ** 11 = Level-triggered + */ + u8 polarity_trigger; + + /* + ** IRQ and DEVNO + ** irq identifies PCI interrupt signal where + ** 0x0 corresponds to INT_A#, + ** 0x1 corresponds to INT_B#, + ** 0x2 corresponds to INT_C# + ** 0x3 corresponds to INT_D# + ** PCI device number where interrupt originates + */ + u8 src_bus_irq_devno; + + /* Source Bus ID identifies the bus where interrupt signal comes from */ + u8 src_bus_id; + + /* + ** Segment ID is unique across a protection domain and + ** identifies a segment of PCI buses (reserved in + ** MP Specification Draft 1.5) + */ + u8 src_seg_id; + + /* + ** Destination I/O SAPIC INTIN# identifies the INTIN n pin + ** to which the signal is connected + */ + u8 dest_iosapic_intin; + + /* + ** Destination I/O SAPIC Address identifies the I/O SAPIC + ** to which the signal is connected + */ + u64 dest_iosapic_addr; +}; + +#define IRT_IOSAPIC_TYPE 139 +#define IRT_IOSAPIC_LENGTH 16 + +#define IRT_VECTORED_INTR 0 + +#define IRT_PO_MASK 0x3 +#define IRT_ACTIVE_HI 1 +#define IRT_ACTIVE_LO 3 + +#define IRT_EL_MASK 0x3 +#define IRT_EL_SHIFT 2 +#define IRT_EDGE_TRIG 1 +#define IRT_LEVEL_TRIG 3 + +#define IRT_IRQ_MASK 0x3 +#define IRT_DEV_MASK 0x1f +#define IRT_DEV_SHIFT 2 + +#define IRT_IRQ_DEVNO_MASK ((IRT_DEV_MASK << IRT_DEV_SHIFT) | IRT_IRQ_MASK) + +#ifdef SUPPORT_MULTI_CELL +struct iosapic_irt { + struct iosapic_irt *irt_next; /* next routing table */ + struct irt_entry *irt_base; /* intr routing table address */ + size_t irte_count; /* number of entries in the table */ + size_t irte_size; /* size (bytes) of each entry */ +}; +#endif + +struct vector_info { + struct iosapic_info *iosapic; /* I/O SAPIC this vector is on */ + struct irt_entry *irte; /* IRT entry */ + __le32 __iomem *eoi_addr; /* precalculate EOI reg address */ + __le32 eoi_data; /* IA64: ? PA: swapped txn_data */ + int txn_irq; /* virtual IRQ number for processor */ + ulong txn_addr; /* IA64: id_eid PA: partial HPA */ + u32 txn_data; /* CPU interrupt bit */ + u8 status; /* status/flags */ + u8 irqline; /* INTINn(IRQ) */ +}; + + +struct iosapic_info { + struct iosapic_info * isi_next; /* list of I/O SAPIC */ + void __iomem * addr; /* remapped address */ + unsigned long isi_hpa; /* physical base address */ + struct vector_info * isi_vector; /* IRdT (IRQ line) array */ + int isi_num_vectors; /* size of IRdT array */ + int isi_status; /* status/flags */ + unsigned int isi_version; /* DEBUG: data fr version reg */ +}; + + + +#ifdef __IA64__ +/* +** PA risc does NOT have any local sapics. IA64 does. +** PIB (Processor Interrupt Block) is handled by Astro or Dew (Stretch CEC). +** +** PA: Get id_eid from IRT and hardcode PIB to 0xfeeNNNN0 +** Emulate the data on PAT platforms. +*/ +struct local_sapic_info { + struct local_sapic_info *lsi_next; /* point to next CPU info */ + int *lsi_cpu_id; /* point to logical CPU id */ + unsigned long *lsi_id_eid; /* point to IA-64 CPU id */ + int *lsi_status; /* point to CPU status */ + void *lsi_private; /* point to special info */ +}; + +/* +** "root" data structure which ties everything together. +** Should always be able to start with sapic_root and locate +** the desired information. +*/ +struct sapic_info { + struct sapic_info *si_next; /* info is per cell */ + int si_cellid; /* cell id */ + unsigned int si_status; /* status */ + char *si_pib_base; /* intr blk base address */ + local_sapic_info_t *si_local_info; + io_sapic_info_t *si_io_info; + extint_info_t *si_extint_info;/* External Intr info */ +}; +#endif + |