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a3c0e0d003
This introduces a saner pcibios_align_resource() that can be used regardless of whether pci-auto or pci-new are being used, and consolidates it in pci-lib.c. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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unsigned long PCIBIOS_MIN_IO = 0x0000;
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unsigned long PCIBIOS_MIN_MEM = 0;
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/*
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* We need to avoid collisions with `mirrored' VGA ports
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* and other strange ISA hardware, so we always want the
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* addresses to be allocated in the 0x000-0x0ff region
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* modulo 0x400.
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*/
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void pcibios_align_resource(void *data, struct resource *res,
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resource_size_t size, resource_size_t align)
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{
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struct pci_dev *dev = data;
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struct pci_channel *chan = dev->sysdata;
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resource_size_t start = res->start;
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if (res->flags & IORESOURCE_IO) {
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if (start < PCIBIOS_MIN_IO + chan->io_resource->start)
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start = PCIBIOS_MIN_IO + chan->io_resource->start;
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/*
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* Put everything into 0x00-0xff region modulo 0x400.
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*/
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if (start & 0x300) {
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start = (start + 0x3ff) & ~0x3ff;
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res->start = start;
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}
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} else if (res->flags & IORESOURCE_MEM) {
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if (start < PCIBIOS_MIN_MEM + chan->mem_resource->start)
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start = PCIBIOS_MIN_MEM + chan->mem_resource->start;
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}
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res->start = start;
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}
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int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
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enum pci_mmap_state mmap_state, int write_combine)
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{
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/*
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* I/O space can be accessed via normal processor loads and stores on
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* this platform but for now we elect not to do this and portable
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* drivers should not do this anyway.
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*/
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if (mmap_state == pci_mmap_io)
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return -EINVAL;
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/*
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* Ignore write-combine; for now only return uncached mappings.
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*/
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vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
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return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
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vma->vm_end - vma->vm_start,
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vma->vm_page_prot);
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}
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#ifdef CONFIG_HOTPLUG
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EXPORT_SYMBOL(pcibios_resource_to_bus);
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EXPORT_SYMBOL(pcibios_bus_to_resource);
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EXPORT_SYMBOL(PCIBIOS_MIN_IO);
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EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
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#endif
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