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/* $Id: pci_common.c,v 1.29 2002/02/01 00:56:03 davem Exp $
* pci_common.c: PCI controller common support.
*
* Copyright (C) 1999 David S. Miller (davem@redhat.com)
*/
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <asm/pbm.h>
#include <asm/prom.h>
#include <asm/of_device.h>
#include "pci_impl.h"
void pci_register_legacy_regions(struct resource *io_res,
struct resource *mem_res)
{
struct resource *p;
/* VGA Video RAM. */
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (!p)
return;
p->name = "Video RAM area";
p->start = mem_res->start + 0xa0000UL;
p->end = p->start + 0x1ffffUL;
p->flags = IORESOURCE_BUSY;
request_resource(mem_res, p);
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (!p)
return;
p->name = "System ROM";
p->start = mem_res->start + 0xf0000UL;
p->end = p->start + 0xffffUL;
p->flags = IORESOURCE_BUSY;
request_resource(mem_res, p);
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (!p)
return;
p->name = "Video ROM";
p->start = mem_res->start + 0xc0000UL;
p->end = p->start + 0x7fffUL;
p->flags = IORESOURCE_BUSY;
request_resource(mem_res, p);
}
/* Generic helper routines for PCI error reporting. */
void pci_scan_for_target_abort(struct pci_controller_info *p,
struct pci_pbm_info *pbm,
struct pci_bus *pbus)
{
struct pci_dev *pdev;
struct pci_bus *bus;
list_for_each_entry(pdev, &pbus->devices, bus_list) {
u16 status, error_bits;
pci_read_config_word(pdev, PCI_STATUS, &status);
error_bits =
(status & (PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT));
if (error_bits) {
pci_write_config_word(pdev, PCI_STATUS, error_bits);
printk("PCI%d(PBM%c): Device [%s] saw Target Abort [%016x]\n",
p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
pci_name(pdev), status);
}
}
list_for_each_entry(bus, &pbus->children, node)
pci_scan_for_target_abort(p, pbm, bus);
}
void pci_scan_for_master_abort(struct pci_controller_info *p,
struct pci_pbm_info *pbm,
struct pci_bus *pbus)
{
struct pci_dev *pdev;
struct pci_bus *bus;
list_for_each_entry(pdev, &pbus->devices, bus_list) {
u16 status, error_bits;
pci_read_config_word(pdev, PCI_STATUS, &status);
error_bits =
(status & (PCI_STATUS_REC_MASTER_ABORT));
if (error_bits) {
pci_write_config_word(pdev, PCI_STATUS, error_bits);
printk("PCI%d(PBM%c): Device [%s] received Master Abort [%016x]\n",
p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
pci_name(pdev), status);
}
}
list_for_each_entry(bus, &pbus->children, node)
pci_scan_for_master_abort(p, pbm, bus);
}
void pci_scan_for_parity_error(struct pci_controller_info *p,
struct pci_pbm_info *pbm,
struct pci_bus *pbus)
{
struct pci_dev *pdev;
struct pci_bus *bus;
list_for_each_entry(pdev, &pbus->devices, bus_list) {
u16 status, error_bits;
pci_read_config_word(pdev, PCI_STATUS, &status);
error_bits =
(status & (PCI_STATUS_PARITY |
PCI_STATUS_DETECTED_PARITY));
if (error_bits) {
pci_write_config_word(pdev, PCI_STATUS, error_bits);
printk("PCI%d(PBM%c): Device [%s] saw Parity Error [%016x]\n",
p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
pci_name(pdev), status);
}
}
list_for_each_entry(bus, &pbus->children, node)
pci_scan_for_parity_error(p, pbm, bus);
}
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