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/* 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 */
u32 __iomem *eoi_addr; /* precalculate EOI reg address */
u32 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
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