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| author | Steven Whitehouse <swhiteho@redhat.com> | 2006-09-28 08:29:59 -0400 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-09-28 08:29:59 -0400 |
| commit | 185a257f2f73bcd89050ad02da5bedbc28fc43fa (patch) | |
| tree | 5e32586114534ed3f2165614cba3d578f5d87307 /arch/sh/mm/ioremap.c | |
| parent | 3f1a9aaeffd8d1cbc5ab9776c45cbd66af1c9699 (diff) | |
| parent | a77c64c1a641950626181b4857abb701d8f38ccc (diff) | |
| download | linux-185a257f2f73bcd89050ad02da5bedbc28fc43fa.tar.bz2 | |
Merge branch 'master' into gfs2
Diffstat (limited to 'arch/sh/mm/ioremap.c')
| -rw-r--r-- | arch/sh/mm/ioremap.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/sh/mm/ioremap.c b/arch/sh/mm/ioremap.c index 96fa4a999e2a..a9fe80cfc233 100644 --- a/arch/sh/mm/ioremap.c +++ b/arch/sh/mm/ioremap.c @@ -15,6 +15,7 @@ #include <linux/vmalloc.h> #include <linux/module.h> #include <linux/mm.h> +#include <linux/pci.h> #include <asm/io.h> #include <asm/page.h> #include <asm/pgalloc.h> @@ -135,6 +136,20 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size, return (void __iomem *)phys_to_virt(phys_addr); /* + * If we're on an SH7751 or SH7780 PCI controller, PCI memory is + * mapped at the end of the address space (typically 0xfd000000) + * in a non-translatable area, so mapping through page tables for + * this area is not only pointless, but also fundamentally + * broken. Just return the physical address instead. + * + * For boards that map a small PCI memory aperture somewhere in + * P1/P2 space, ioremap() will already do the right thing, + * and we'll never get this far. + */ + if (is_pci_memaddr(phys_addr) && is_pci_memaddr(last_addr)) + return (void __iomem *)phys_addr; + + /* * Don't allow anybody to remap normal RAM that we're using.. */ if (phys_addr < virt_to_phys(high_memory)) @@ -192,7 +207,7 @@ void __iounmap(void __iomem *addr) unsigned long vaddr = (unsigned long __force)addr; struct vm_struct *p; - if (PXSEG(vaddr) < P3SEG) + if (PXSEG(vaddr) < P3SEG || is_pci_memaddr(vaddr)) return; #ifdef CONFIG_32BIT |