src/mainboard/gizmosphere/gizmo/irq_tables.c

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