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-rw-r--r--arch/mn10300/unit-asb2305/pci-asb2305.c212
1 files changed, 0 insertions, 212 deletions
diff --git a/arch/mn10300/unit-asb2305/pci-asb2305.c b/arch/mn10300/unit-asb2305/pci-asb2305.c
deleted file mode 100644
index e0f4617c0c7a..000000000000
--- a/arch/mn10300/unit-asb2305/pci-asb2305.c
+++ /dev/null
@@ -1,212 +0,0 @@
-/* ASB2305 PCI resource stuff
- *
- * Copyright (C) 2001 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- * - Derived from arch/i386/pci-i386.c
- * - Copyright 1997--2000 Martin Mares <mj@suse.cz>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/errno.h>
-#include "pci-asb2305.h"
-
-/*
- * We need to avoid collisions with `mirrored' VGA ports
- * and other strange ISA hardware, so we always want the
- * addresses to be allocated in the 0x000-0x0ff region
- * modulo 0x400.
- *
- * Why? Because some silly external IO cards only decode
- * the low 10 bits of the IO address. The 0x00-0xff region
- * is reserved for motherboard devices that decode all 16
- * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
- * but we want to try to avoid allocating at 0x2900-0x2bff
- * which might have be mirrored at 0x0100-0x03ff..
- */
-resource_size_t pcibios_align_resource(void *data, const struct resource *res,
- resource_size_t size, resource_size_t align)
-{
- resource_size_t start = res->start;
-
-#if 0
- struct pci_dev *dev = data;
-
- printk(KERN_DEBUG
- "### PCIBIOS_ALIGN_RESOURCE(%s,,{%08lx-%08lx,%08lx},%lx)\n",
- pci_name(dev),
- res->start,
- res->end,
- res->flags,
- size
- );
-#endif
-
- if ((res->flags & IORESOURCE_IO) && (start & 0x300))
- start = (start + 0x3ff) & ~0x3ff;
-
- return start;
-}
-
-
-/*
- * Handle resources of PCI devices. If the world were perfect, we could
- * just allocate all the resource regions and do nothing more. It isn't.
- * On the other hand, we cannot just re-allocate all devices, as it would
- * require us to know lots of host bridge internals. So we attempt to
- * keep as much of the original configuration as possible, but tweak it
- * when it's found to be wrong.
- *
- * Known BIOS problems we have to work around:
- * - I/O or memory regions not configured
- * - regions configured, but not enabled in the command register
- * - bogus I/O addresses above 64K used
- * - expansion ROMs left enabled (this may sound harmless, but given
- * the fact the PCI specs explicitly allow address decoders to be
- * shared between expansion ROMs and other resource regions, it's
- * at least dangerous)
- *
- * Our solution:
- * (1) Allocate resources for all buses behind PCI-to-PCI bridges.
- * This gives us fixed barriers on where we can allocate.
- * (2) Allocate resources for all enabled devices. If there is
- * a collision, just mark the resource as unallocated. Also
- * disable expansion ROMs during this step.
- * (3) Try to allocate resources for disabled devices. If the
- * resources were assigned correctly, everything goes well,
- * if they weren't, they won't disturb allocation of other
- * resources.
- * (4) Assign new addresses to resources which were either
- * not configured at all or misconfigured. If explicitly
- * requested by the user, configure expansion ROM address
- * as well.
- */
-static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
-{
- struct pci_bus *bus;
- struct pci_dev *dev;
- int idx;
- struct resource *r;
-
- /* Depth-First Search on bus tree */
- list_for_each_entry(bus, bus_list, node) {
- dev = bus->self;
- if (dev) {
- for (idx = PCI_BRIDGE_RESOURCES;
- idx < PCI_NUM_RESOURCES;
- idx++) {
- r = &dev->resource[idx];
- if (!r->flags)
- continue;
- if (!r->start ||
- pci_claim_bridge_resource(dev, idx) < 0) {
- printk(KERN_ERR "PCI:"
- " Cannot allocate resource"
- " region %d of bridge %s\n",
- idx, pci_name(dev));
- /* Something is wrong with the region.
- * Invalidate the resource to prevent
- * child resource allocations in this
- * range. */
- r->start = r->end = 0;
- r->flags = 0;
- }
- }
- }
- pcibios_allocate_bus_resources(&bus->children);
- }
-}
-
-static void __init pcibios_allocate_resources(int pass)
-{
- struct pci_dev *dev = NULL;
- int idx, disabled;
- u16 command;
- struct resource *r;
-
- for_each_pci_dev(dev) {
- pci_read_config_word(dev, PCI_COMMAND, &command);
- for (idx = 0; idx < 6; idx++) {
- r = &dev->resource[idx];
- if (r->parent) /* Already allocated */
- continue;
- if (!r->start) /* Address not assigned */
- continue;
- if (r->flags & IORESOURCE_IO)
- disabled = !(command & PCI_COMMAND_IO);
- else
- disabled = !(command & PCI_COMMAND_MEMORY);
- if (pass == disabled) {
- DBG("PCI[%s]: Resource %08lx-%08lx"
- " (f=%lx, d=%d, p=%d)\n",
- pci_name(dev), r->start, r->end, r->flags,
- disabled, pass);
- if (pci_claim_resource(dev, idx) < 0) {
- printk(KERN_ERR "PCI:"
- " Cannot allocate resource"
- " region %d of device %s\n",
- idx, pci_name(dev));
- /* We'll assign a new address later */
- r->end -= r->start;
- r->start = 0;
- }
- }
- }
- if (!pass) {
- r = &dev->resource[PCI_ROM_RESOURCE];
- if (r->flags & IORESOURCE_ROM_ENABLE) {
- /* Turn the ROM off, leave the resource region,
- * but keep it unregistered. */
- u32 reg;
- DBG("PCI: Switching off ROM of %s\n",
- pci_name(dev));
- r->flags &= ~IORESOURCE_ROM_ENABLE;
- pci_read_config_dword(
- dev, dev->rom_base_reg, &reg);
- pci_write_config_dword(
- dev, dev->rom_base_reg,
- reg & ~PCI_ROM_ADDRESS_ENABLE);
- }
- }
- }
-}
-
-static int __init pcibios_assign_resources(void)
-{
- struct pci_dev *dev = NULL;
- struct resource *r;
-
- /* Try to use BIOS settings for ROMs, otherwise let
- pci_assign_unassigned_resources() allocate the new
- addresses. */
- for_each_pci_dev(dev) {
- r = &dev->resource[PCI_ROM_RESOURCE];
- if (!r->flags || !r->start)
- continue;
- if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {
- r->end -= r->start;
- r->start = 0;
- }
- }
-
- pci_assign_unassigned_resources();
-
- return 0;
-}
-
-fs_initcall(pcibios_assign_resources);
-
-void __init pcibios_resource_survey(void)
-{
- DBG("PCI: Allocating resources\n");
- pcibios_allocate_bus_resources(&pci_root_buses);
- pcibios_allocate_resources(0);
- pcibios_allocate_resources(1);
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.