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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
* Copyright (C) 2015 Raptor Engineering
*
* 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; version 2 of the License.
*
* 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.
*/
#include <console/console.h>
#include <device/pci_ids.h>
#include <device/pci.h>
#include <string.h>
#include <stdint.h>
#include <arch/pirq_routing.h>
#include <cpu/amd/amdfam10_sysconf.h>
/* Free irqs are 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, and 15 */
#define IRQBM ((1 << 3)|(1 << 4)|(1 << 5)|(1 << 6)|(1 << 7)|(1 << 9)|(1 << 10)|(1 << 11)|(1 << 12)|(1 << 14)|(1 << 15))
#define LNKA 1
#define LNKB 2
#define LNKC 3
#define LNKD 4
/*
* For simplicity map LNK[E-H] to LNK[A-D].
* This also means we are 82C596 compatible.
* Needs 0:11.0 0x46[4] set to 0.
*/
#define LNKE 1
#define LNKF 2
#define LNKG 3
#define LNKH 4
static void write_pirq_info(struct irq_info *pirq_info, u8 bus, u8 devfn,
u8 link0, u16 bitmap0, u8 link1, u16 bitmap1,
u8 link2, u16 bitmap2, u8 link3, u16 bitmap3,
u8 slot, u8 rfu)
{
pirq_info->bus = bus;
pirq_info->devfn = devfn;
pirq_info->irq[0].link = link0;
pirq_info->irq[0].bitmap = bitmap0;
pirq_info->irq[1].link = link1;
pirq_info->irq[1].bitmap = bitmap1;
pirq_info->irq[2].link = link2;
pirq_info->irq[2].bitmap = bitmap2;
pirq_info->irq[3].link = link3;
pirq_info->irq[3].bitmap = bitmap3;
pirq_info->slot = slot;
pirq_info->rfu = rfu;
}
unsigned long write_pirq_routing_table(unsigned long addr)
{
struct irq_routing_table *pirq;
struct irq_info *pirq_info;
u32 slot_num;
u8 *v;
u8 sum = 0;
int i;
/* Align the table to be 16 byte aligned. */
addr += 15;
addr &= ~15;
/* This table must be between 0xf0000 & 0x100000 */
printk(BIOS_INFO, "Writing IRQ routing tables to 0x%lx...", addr);
pirq = (void *)(addr);
v = (u8 *) (addr);
pirq->signature = PIRQ_SIGNATURE;
pirq->version = PIRQ_VERSION;
/* Where the interrupt router resides */
pirq->rtr_bus = pirq_router_bus;
pirq->rtr_devfn = PCI_DEVFN(0x14, 4);
pirq->exclusive_irqs = 0;
pirq->rtr_vendor = PCI_VENDOR_ID_ATI;
pirq->rtr_device = PCI_DEVICE_ID_ATI_SB700_PCI;
pirq->miniport_data = 0;
memset(pirq->rfu, 0, sizeof(pirq->rfu));
pirq_info = (void *)(&pirq->checksum + 1);
slot_num = 0;
/* pci bridge */
write_pirq_info(pirq_info, pirq_router_bus,
PCI_DEVFN(0x14, 4), LNKA, IRQBM, LNKB,
IRQBM, LNKC, IRQBM, LNKD, IRQBM, 0, 0);
pirq_info++;
slot_num++;
pirq->size = 32 + 16 * slot_num;
for (i = 0; i < pirq->size; i++)
sum += v[i];
sum = pirq->checksum - sum;
if (sum != pirq->checksum) {
pirq->checksum = sum;
}
printk(BIOS_INFO, "done.\n");
return (unsigned long)pirq_info;
}
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