]> www.pilppa.org Git - linux-2.6-omap-h63xx.git/commitdiff
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
authorLinus Torvalds <torvalds@linux-foundation.org>
Wed, 10 Dec 2008 18:03:55 +0000 (10:03 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 10 Dec 2008 18:03:55 +0000 (10:03 -0800)
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: Better than nothing implementation of PCI mmap to fix X.

arch/mips/include/asm/pci.h
arch/mips/pci/pci.c

index 5510c53b7feb7f5b7d2e721b70c763d055f8ef0d..053e4634acee61b78ca8e3d4cd2fded4c4e2aa06 100644 (file)
@@ -79,6 +79,11 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
        /* We don't do dynamic PCI IRQ allocation */
 }
 
+#define HAVE_PCI_MMAP
+
+extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+       enum pci_mmap_state mmap_state, int write_combine);
+
 /*
  * Dynamic DMA mapping stuff.
  * MIPS has everything mapped statically.
index a377e9d2d029be681072a265908ba7f0f9a2dd17..62cae740e250f9d6d42df81897bf3dabe735ede9 100644 (file)
@@ -354,6 +354,30 @@ EXPORT_SYMBOL(PCIBIOS_MIN_IO);
 EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
 #endif
 
+int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+                       enum pci_mmap_state mmap_state, int write_combine)
+{
+       unsigned long prot;
+
+       /*
+        * I/O space can be accessed via normal processor loads and stores on
+        * this platform but for now we elect not to do this and portable
+        * drivers should not do this anyway.
+        */
+       if (mmap_state == pci_mmap_io)
+               return -EINVAL;
+
+       /*
+        * Ignore write-combine; for now only return uncached mappings.
+        */
+       prot = pgprot_val(vma->vm_page_prot);
+       prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
+       vma->vm_page_prot = __pgprot(prot);
+
+       return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+               vma->vm_end - vma->vm_start, vma->vm_page_prot);
+}
+
 char * (*pcibios_plat_setup)(char *str) __devinitdata;
 
 char *__devinit pcibios_setup(char *str)