| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> |
| * Copyright (C) 2012 Patrick Georgi <patrick@georgi-clan.de> |
| * Copyright (C) 2010 Stefan Reinauer <stepan@coreboot.org> |
| * |
| * This program is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation, either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| #ifndef ARCH_PIRQ_ROUTING_H |
| #define ARCH_PIRQ_ROUTING_H |
| |
| /* This is the maximum number on interrupt entries that a PCI device may have. |
| * This is NOT the number of slots or devices in the system |
| * This is NOT the number of entries in the PIRQ table |
| * This tells us that in the PIRQ table, we are going to have 4 link-bitmap |
| * entries per PCI device |
| * It is fixed at 4: INTA, INTB, INTC, and INTD |
| * CAUTION: If you change this, pirq_routing will not work correctly*/ |
| #define MAX_INTX_ENTRIES 4 |
| |
| #if CONFIG_GENERATE_PIRQ_TABLE |
| #include <stdint.h> |
| |
| #define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24)) |
| #define PIRQ_VERSION 0x0100 |
| |
| struct irq_info { |
| u8 bus, devfn; /* Bus, device and function */ |
| struct { |
| u8 link; /* IRQ line ID, chipset dependent, 0=not routed */ |
| u16 bitmap; /* Available IRQs */ |
| } __attribute__((packed)) irq[4]; |
| u8 slot; /* Slot number, 0=onboard */ |
| u8 rfu; |
| } __attribute__((packed)); |
| |
| struct irq_routing_table { |
| u32 signature; /* PIRQ_SIGNATURE should be here */ |
| u16 version; /* PIRQ_VERSION */ |
| u16 size; /* Table size in bytes */ |
| u8 rtr_bus, rtr_devfn; /* Where the interrupt router lies */ |
| u16 exclusive_irqs; /* IRQs devoted exclusively to PCI usage */ |
| u16 rtr_vendor, rtr_device;/* Vendor/device ID of interrupt router */ |
| u32 miniport_data; |
| u8 rfu[11]; |
| u8 checksum; /* Modulo 256 checksum must give zero */ |
| struct irq_info slots[CONFIG_IRQ_SLOT_COUNT]; |
| } __attribute__((packed)); |
| |
| unsigned long copy_pirq_routing_table(unsigned long addr, const struct irq_routing_table *routing_table); |
| unsigned long write_pirq_routing_table(unsigned long start); |
| |
| #if CONFIG_PIRQ_ROUTE |
| void pirq_assign_irqs(const unsigned char pirq[CONFIG_MAX_PIRQ_LINKS]); |
| #endif |
| |
| #else |
| #define copy_pirq_routing_table(start) (start) |
| #define write_pirq_routing_table(start) (start) |
| #endif |
| |
| #endif /* ARCH_PIRQ_ROUTING_H */ |