Author: andrew
Date: Wed Jul 13 23:03:34 2016
New Revision: 302789
URL: https://svnweb.freebsd.org/changeset/base/302789
Log:
Add memmmap on arm64 so we can mmap /dev/mem and /dev/kmem.
Obtained from: ABT Systems Ltd
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/arm64/arm64/mem.c
head/sys/arm64/include/memdev.h
Modified: head/sys/arm64/arm64/mem.c
==============================================================================
--- head/sys/arm64/arm64/mem.c Wed Jul 13 22:53:30 2016 (r302788)
+++ head/sys/arm64/arm64/mem.c Wed Jul 13 23:03:34 2016 (r302789)
@@ -114,3 +114,19 @@ memrw(struct cdev *dev, struct uio *uio,
return (error);
}
+/*
+ * allow user processes to MMAP some memory sections
+ * instead of going through read/write
+ */
+/* ARGSUSED */
+int
+memmmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
+ int prot __unused, vm_memattr_t *memattr __unused)
+{
+ if (dev2unit(dev) == CDEV_MINOR_MEM)
+ *paddr = offset;
+ else if (dev2unit(dev) == CDEV_MINOR_KMEM)
+ *paddr = vtophys(offset);
+ /* else panic! */
+ return (0);
+}
Modified: head/sys/arm64/include/memdev.h
==============================================================================
--- head/sys/arm64/include/memdev.h Wed Jul 13 22:53:30 2016
(r302788)
+++ head/sys/arm64/include/memdev.h Wed Jul 13 23:03:34 2016
(r302789)
@@ -35,6 +35,6 @@
d_open_t memopen;
d_read_t memrw;
#define memioctl (d_ioctl_t *)NULL
-#define memmmap (d_mmap_t *)NULL
+d_mmap_t memmmap;
#endif /* _MACHINE_MEMDEV_H_ */
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