src/mainboard/bap/ode_e20XX/irq_tables.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2012 Advanced Micro Devices, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <console/console.h>
  17 #include <device/pci.h>
  18 #include <string.h>
  19 #include <stdint.h>
  20 #include <arch/pirq_routing.h>
  21 #include <cpu/amd/amdfam16.h>
  22
  23 static void write_pirq_info(struct irq_info *pirq_info, u8 bus, u8 devfn,
  24                             u8 link0, u16 bitmap0, u8 link1, u16 bitmap1,
  25                             u8 link2, u16 bitmap2, u8 link3, u16 bitmap3,
  26                             u8 slot, u8 rfu)
  27 {
  28         pirq_info->bus = bus;
  29         pirq_info->devfn = devfn;
  30         pirq_info->irq[0].link = link0;
  31         pirq_info->irq[0].bitmap = bitmap0;
  32         pirq_info->irq[1].link = link1;
  33         pirq_info->irq[1].bitmap = bitmap1;
  34         pirq_info->irq[2].link = link2;
  35         pirq_info->irq[2].bitmap = bitmap2;
  36         pirq_info->irq[3].link = link3;
  37         pirq_info->irq[3].bitmap = bitmap3;
  38         pirq_info->slot = slot;
  39         pirq_info->rfu = rfu;
  40 }
  41
  42
  43 unsigned long write_pirq_routing_table(unsigned long addr)
  44 {
  45         struct irq_routing_table *pirq;
  46         struct irq_info *pirq_info;
  47         u32 slot_num;
  48         u8 *v;
  49
  50         u8 sum = 0;
  51         int i;
  52
  53         /* Align the table to be 16 byte aligned. */
  54         addr += 15;
  55         addr &= ~15;
  56
  57         /* This table must be between 0xf0000 & 0x100000 */
  58         printk(BIOS_INFO, "Writing IRQ routing tables to 0x%lx...", addr);
  59
  60         pirq = (void *)(addr);
  61         v = (u8 *) (addr);
  62
  63         pirq->signature = PIRQ_SIGNATURE;
  64         pirq->version = PIRQ_VERSION;
  65
  66         pirq->rtr_bus = 0;
  67         pirq->rtr_devfn = PCI_DEVFN(0x14, 4);
  68
  69         pirq->exclusive_irqs = 0;
  70
  71         pirq->rtr_vendor = 0x1002;
  72         pirq->rtr_device = 0x4384;
  73
  74         pirq->miniport_data = 0;
  75
  76         memset(pirq->rfu, 0, sizeof(pirq->rfu));
  77
  78         pirq_info = (void *)(&pirq->checksum + 1);
  79         slot_num = 0;
  80
  81         /* pci bridge */
  82         write_pirq_info(pirq_info, 0, PCI_DEVFN(0x14, 4),
  83                         0x1, 0xdef8, 0x2, 0xdef8, 0x3, 0xdef8, 0x4, 0xdef8, 0,
  84                         0);
  85         pirq_info++;
  86
  87         slot_num++;
  88
  89         pirq->size = 32 + 16 * slot_num;
  90
  91         for (i = 0; i < pirq->size; i++)
  92                 sum += v[i];
  93
  94         sum = pirq->checksum - sum;
  95
  96         if (sum != pirq->checksum) {
  97                 pirq->checksum = sum;
  98         }
  99
 100         printk(BIOS_INFO, "write_pirq_routing_table done.\n");
 101
 102         return (unsigned long)pirq_info;
 103 }