/* 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;
};
#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 */ unsignedlong 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 */ unsignedint 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 */ unsignedlong *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 */ unsignedint 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
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