--- /dev/null
+/* Copyright 2019 SiFive, Inc */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include <metal/machine/platform.h>
+
+#ifdef METAL_SIFIVE_CCACHE0
+
+#include <stdint.h>
+#include <metal/io.h>
+#include <metal/drivers/sifive_ccache0.h>
+#include <metal/machine.h>
+
+#define L2_CONFIG_WAYS_SHIFT 8
+#define L2_CONFIG_WAYS_MASK (0xFF << L2_CONFIG_WAYS_SHIFT)
+
+void __metal_driver_sifive_ccache0_init(struct metal_cache *l2, int ways);
+
+static void metal_driver_sifive_ccache0_init(void) __attribute__((constructor));
+static void metal_driver_sifive_ccache0_init(void)
+{
+#ifdef __METAL_DT_SIFIVE_CCACHE0_HANDLE
+ /* Get the handle for the L2 cache controller */
+ struct metal_cache *l2 = __METAL_DT_SIFIVE_CCACHE0_HANDLE;
+ if(!l2) {
+ return;
+ }
+
+ /* Get the number of available ways per bank */
+ unsigned long control_base = __metal_driver_sifive_ccache0_control_base(l2);
+ uint32_t ways = __METAL_ACCESS_ONCE((__metal_io_u32 *)(control_base + METAL_SIFIVE_CCACHE0_CONFIG));
+ ways = ((ways & L2_CONFIG_WAYS_MASK) >> L2_CONFIG_WAYS_SHIFT);
+
+ /* Enable all the ways */
+ __metal_driver_sifive_ccache0_init(l2, ways);
+#endif
+}
+
+void __metal_driver_sifive_ccache0_init(struct metal_cache *l2, int ways)
+{
+ metal_cache_set_enabled_ways(l2, ways);
+}
+
+int __metal_driver_sifive_ccache0_get_enabled_ways(struct metal_cache *cache)
+{
+ unsigned long control_base = __metal_driver_sifive_ccache0_control_base(cache);
+
+ uint32_t way_enable = __METAL_ACCESS_ONCE((__metal_io_u32 *)(control_base + METAL_SIFIVE_CCACHE0_WAYENABLE));
+
+ /* The stored number is the index, so add one */
+ return (0xFF & way_enable) + 1;
+}
+
+int __metal_driver_sifive_ccache0_set_enabled_ways(struct metal_cache *cache, int ways)
+{
+ unsigned long control_base = __metal_driver_sifive_ccache0_control_base(cache);
+
+ /* We can't decrease the number of enabled ways */
+ if(metal_cache_get_enabled_ways(cache) > ways) {
+ return -2;
+ }
+
+ /* The stored value is the index, so subtract one */
+ uint32_t value = 0xFF & (ways - 1);
+
+ /* Set the number of enabled ways */
+ __METAL_ACCESS_ONCE((__metal_io_u32 *)(control_base + METAL_SIFIVE_CCACHE0_WAYENABLE)) = value;
+
+ /* Make sure the number of ways was set correctly */
+ if(metal_cache_get_enabled_ways(cache) != ways) {
+ return -3;
+ }
+
+ return 0;
+}
+
+__METAL_DEFINE_VTABLE(__metal_driver_vtable_sifive_ccache0) = {
+ .cache.init = __metal_driver_sifive_ccache0_init,
+ .cache.get_enabled_ways = __metal_driver_sifive_ccache0_get_enabled_ways,
+ .cache.set_enabled_ways = __metal_driver_sifive_ccache0_set_enabled_ways,
+};
+
+#endif
+
+typedef int no_empty_translation_units;