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authorPaul Mundt <lethal@linux-sh.org>2009-04-20 15:51:45 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-04-20 15:51:45 +0900
commit9833385131fc4e8c52f95320ab899051d1c06831 (patch)
treeb293094ef57c340e196bae1a79ab061b2f93df46 /arch/sh/drivers
parent4c5107e44514a9bde74d0af77982705d602d9e39 (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/sh/drivers')
-rw-r--r--arch/sh/drivers/pci/Makefile6
-rw-r--r--arch/sh/drivers/pci/pci-lib.c26
2 files changed, 29 insertions, 3 deletions
diff --git a/arch/sh/drivers/pci/Makefile b/arch/sh/drivers/pci/Makefile
index 362a1eec73a4..c8eab14843e5 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 000000000000..1a43a350d574
--- /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);
+}