diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2009-04-20 15:51:45 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-04-20 15:51:45 +0900 |
| commit | 9833385131fc4e8c52f95320ab899051d1c06831 (patch) | |
| tree | b293094ef57c340e196bae1a79ab061b2f93df46 /arch | |
| parent | 4c5107e44514a9bde74d0af77982705d602d9e39 (diff) | |
sh: pci: HAVE_PCI_MMAP support.
Derived from the MIPS version, now uses pgprot_noncached().
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/drivers/pci/Makefile | 6 | ||||
| -rw-r--r-- | arch/sh/drivers/pci/pci-lib.c | 26 | ||||
| -rw-r--r-- | arch/sh/include/asm/pci.h | 3 |
3 files changed, 32 insertions, 3 deletions
diff --git a/arch/sh/drivers/pci/Makefile b/arch/sh/drivers/pci/Makefile index 362a1eec73a..c8eab14843e 100644 --- a/arch/sh/drivers/pci/Makefile +++ b/arch/sh/drivers/pci/Makefile @@ -1,9 +1,9 @@ # # Makefile for the PCI specific kernel interface routines under Linux. # - -obj-$(CONFIG_PCI_AUTO) := pci.o pci-auto.o -obj-$(CONFIG_PCI_NEW) := pci-new.o +obj-y += pci-lib.o +obj-$(CONFIG_PCI_AUTO) += pci.o pci-auto.o +obj-$(CONFIG_PCI_NEW) += pci-new.o obj-$(CONFIG_CPU_SUBTYPE_SH7751) += pci-sh7751.o ops-sh4.o obj-$(CONFIG_CPU_SUBTYPE_SH7751R) += pci-sh7751.o ops-sh4.o diff --git a/arch/sh/drivers/pci/pci-lib.c b/arch/sh/drivers/pci/pci-lib.c new file mode 100644 index 00000000000..1a43a350d57 --- /dev/null +++ b/arch/sh/drivers/pci/pci-lib.c @@ -0,0 +1,26 @@ +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/pci.h> + +int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, + enum pci_mmap_state mmap_state, int write_combine) +{ + /* + * 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. + */ + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + vma->vm_end - vma->vm_start, + vma->vm_page_prot); +} diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h index 69cb615c391..46afd449739 100644 --- a/arch/sh/include/asm/pci.h +++ b/arch/sh/include/asm/pci.h @@ -40,6 +40,9 @@ extern struct pci_channel board_pci_channels[]; struct pci_dev; +#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); extern void pcibios_set_master(struct pci_dev *dev); static inline void pcibios_penalize_isa_irq(int irq, int active) |