implement memmap().

With this function we can get a pointer to directly memory mapped
devices like nor flash or RAM. Useful for bootm where we save one
memcopy when the image is mappable

1 files changed, 22 insertions, 0 deletions

diff --git a/lib/driver.c b/lib/driver.c
index 5ec67b491b..8f6c2ffaa6 100644
--- a/lib/driver.c
+++ b/lib/driver.c
@@ -292,6 +292,28 @@ ssize_t dev_erase(struct device_d *dev, size_t count, unsigned long offset)
         return -ENOSYS;
 }
 
+ssize_t dev_memmap(struct device_d *dev, void **map, int flags)
+{
+        if (dev->driver->memmap)
+                return dev->driver->memmap(dev, map, flags);
+	errno = -ENOSYS;
+        return -ENOSYS;
+}
+
+int generic_memmap_ro(struct device_d *dev, void **map, int flags)
+{
+	if (flags & PROT_WRITE)
+		return -EACCES;
+	*map = (void *)dev->map_base;
+	return 0;
+}
+
+int generic_memmap_rw(struct device_d *dev, void **map, int flags)
+{
+	*map = (void *)dev->map_base;
+	return 0;
+}
+
 int dummy_probe(struct device_d *dev)
 {
         return 0;