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sh: pci: HAVE_PCI_MMAP support.

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Derived from the MIPS version, now uses pgprot_noncached().

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-04-20 15:51:45 +09:00
parent 4c5107e445
commit 9833385131
3 changed files with 32 additions and 3 deletions
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6
arch/sh/drivers/pci/Makefile
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@ -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

26
arch/sh/drivers/pci/pci-lib.c Normal file
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@ -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);
}

3
arch/sh/include/asm/pci.h
View File

@ -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)