+++ /dev/null
-/*
- * Authors: Frank Rowand <frank_rowand@mvista.com>,
- * Debbie Chu <debbie_chu@mvista.com>, or source@mvista.com
- * Further modifications by Armin Kuster <akuster@mvista.com>
- *
- * 2000 (c) MontaVista, Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- * Based on arch/ppc/kernel/indirect.c, Copyright (C) 1998 Gabriel Paubert.
- */
-
-#include <linux/pci.h>
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/machdep.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <asm/ocp.h>
-#include <asm/ibm4xx.h>
-#include <asm/pci-bridge.h>
-#include <asm/ibm_ocp_pci.h>
-
-
-extern void bios_fixup(struct pci_controller *, struct pcil0_regs *);
-extern int ppc405_map_irq(struct pci_dev *dev, unsigned char idsel,
- unsigned char pin);
-
-void
-ppc405_pcibios_fixup_resources(struct pci_dev *dev)
-{
- int i;
- unsigned long max_host_addr;
- unsigned long min_host_addr;
- struct resource *res;
-
- /*
- * openbios puts some graphics cards in the same range as the host
- * controller uses to map to SDRAM. Fix it.
- */
-
- min_host_addr = 0;
- max_host_addr = PPC405_PCI_MEM_BASE - 1;
-
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- res = dev->resource + i;
- if (!res->start)
- continue;
- if ((res->flags & IORESOURCE_MEM) &&
- (((res->start >= min_host_addr)
- && (res->start <= max_host_addr))
- || ((res->end >= min_host_addr)
- && (res->end <= max_host_addr))
- || ((res->start < min_host_addr)
- && (res->end > max_host_addr))
- )
- ) {
-
- /* force pcibios_assign_resources() to assign a new address */
- res->end -= res->start;
- res->start = 0;
- }
- }
-}
-
-static int
-ppc4xx_exclude_device(unsigned char bus, unsigned char devfn)
-{
- /* We prevent us from seeing ourselves to avoid having
- * the kernel try to remap our BAR #1 and fuck up bus
- * master from external PCI devices
- */
- return (bus == 0 && devfn == 0);
-}
-
-void
-ppc4xx_find_bridges(void)
-{
- struct pci_controller *hose_a;
- struct pcil0_regs *pcip;
- unsigned int tmp_addr;
- unsigned int tmp_size;
- unsigned int reg_index;
- unsigned int new_pmm_max = 0;
- unsigned int new_pmm_min = 0;
-
- isa_io_base = 0;
- isa_mem_base = 0;
- pci_dram_offset = 0;
-
- /* Setup PCI32 hose */
- hose_a = pcibios_alloc_controller();
- if (!hose_a)
- return;
- setup_indirect_pci(hose_a, PPC405_PCI_CONFIG_ADDR,
- PPC405_PCI_CONFIG_DATA);
-
- pcip = ioremap(PPC4xx_PCI_LCFG_PADDR, PAGE_SIZE);
- if (pcip != NULL) {
-
-#if defined(CONFIG_BIOS_FIXUP)
- bios_fixup(hose_a, pcip);
-#endif
- new_pmm_min = 0xffffffff;
- for (reg_index = 0; reg_index < 3; reg_index++) {
- tmp_size = in_le32(&pcip->pmm[reg_index].ma); // mask & attrs
- /* test the enable bit */
- if ((tmp_size & 0x1) == 0)
- continue;
- tmp_addr = in_le32(&pcip->pmm[reg_index].pcila); // PCI addr
- if (tmp_addr < PPC405_PCI_PHY_MEM_BASE) {
- printk(KERN_DEBUG
- "Disabling mapping to PCI mem addr 0x%8.8x\n",
- tmp_addr);
- out_le32(&pcip->pmm[reg_index].ma, tmp_size & ~1); // *_PMMOMA
- continue;
- }
- tmp_addr = in_le32(&pcip->pmm[reg_index].la); // *_PMMOLA
- if (tmp_addr < new_pmm_min)
- new_pmm_min = tmp_addr;
- tmp_addr = tmp_addr +
- (0xffffffff - (tmp_size & 0xffffc000));
- if (tmp_addr > PPC405_PCI_UPPER_MEM) {
- new_pmm_max = tmp_addr; // PPC405_PCI_UPPER_MEM
- } else {
- new_pmm_max = PPC405_PCI_UPPER_MEM;
- }
-
- } // for
-
- iounmap(pcip);
- }
-
- hose_a->first_busno = 0;
- hose_a->last_busno = 0xff;
- hose_a->pci_mem_offset = 0;
-
- /* Setup bridge memory/IO ranges & resources
- * TODO: Handle firmware setting up a legacy ISA mem base
- */
- hose_a->io_space.start = PPC405_PCI_LOWER_IO;
- hose_a->io_space.end = PPC405_PCI_UPPER_IO;
- hose_a->mem_space.start = new_pmm_min;
- hose_a->mem_space.end = new_pmm_max;
- hose_a->io_base_phys = PPC405_PCI_PHY_IO_BASE;
- hose_a->io_base_virt = ioremap(hose_a->io_base_phys, 0x10000);
- hose_a->io_resource.start = 0;
- hose_a->io_resource.end = PPC405_PCI_UPPER_IO - PPC405_PCI_LOWER_IO;
- hose_a->io_resource.flags = IORESOURCE_IO;
- hose_a->io_resource.name = "PCI I/O";
- hose_a->mem_resources[0].start = new_pmm_min;
- hose_a->mem_resources[0].end = new_pmm_max;
- hose_a->mem_resources[0].flags = IORESOURCE_MEM;
- hose_a->mem_resources[0].name = "PCI Memory";
- isa_io_base = (int) hose_a->io_base_virt;
- isa_mem_base = 0; /* ISA not implemented */
- ISA_DMA_THRESHOLD = 0x00ffffff; /* ??? ISA not implemented */
-
- /* Scan busses & initial setup by pci_auto */
- hose_a->last_busno = pciauto_bus_scan(hose_a, hose_a->first_busno);
- hose_a->last_busno = 0;
-
- /* Setup ppc_md */
- ppc_md.pcibios_fixup = NULL;
- ppc_md.pci_exclude_device = ppc4xx_exclude_device;
- ppc_md.pcibios_fixup_resources = ppc405_pcibios_fixup_resources;
- ppc_md.pci_swizzle = common_swizzle;
- ppc_md.pci_map_irq = ppc405_map_irq;
-}
projects / mirror_ubuntu-artful-kernel.git / blobdiff