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/*
* pir.c: Support for genrating $PIR tables.
*
* Copyright (c) 2011 Citrix Systems Inc
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include "config.h"
#include "pir_types.h"
#include "util.h"
/*
* The structure of these tables is described in
* http://www.microsoft.com/taiwan/whdc/archive/pciirq.mspx
*/
unsigned long create_pir_tables(void)
{
int length = sizeof(struct pir_table)
+ sizeof(struct pir_slot) * NR_PIR_SLOTS;
struct pir_table *pir = scratch_alloc(length, 0);
int i, checksum;
memset(pir, 0, length);
memcpy(pir->signature, "$PIR", 4);
pir->version = 0x0100;
pir->length = length;
pir->router_bus = 0;
pir->router_devfn = PCI_ISA_DEVFN;
pir->router_vid = 0x8086;
pir->router_did = 0x122e;
pir->pci_irqs = 0x0000;
for ( i = 0 ; i < NR_PIR_SLOTS; i++ )
{
struct pir_slot *slot = &pir->slots[i];
slot->slot = i;
slot->bus = 0;
slot->dev = i<<3;
slot->link_a = 0x60 + (i+1)%4;
slot->bitmap_a = PCI_ISA_IRQ_MASK;
slot->link_b = 0x60 + (i+2)%4;
slot->bitmap_b = PCI_ISA_IRQ_MASK;
slot->link_c = 0x60 + (i+3)%4;
slot->bitmap_c = PCI_ISA_IRQ_MASK;
slot->link_d = 0x60 + (i+4)%4;
slot->bitmap_d = PCI_ISA_IRQ_MASK;
}
checksum = 0;
for ( i = 0; i < length; i++ )
checksum += ((int8_t *)pir)[i];
pir->checksum = -checksum;
return (unsigned long)pir;
}
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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