sw: Add LLC functions

sw/include/dif/axi_llc.h

@@ -0,0 +1,13 @@
+// Copyright 2022 ETH Zurich and University of Bologna.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Cyril Koenig <[email protected]>
+
+#pragma once
+
+void llc_enable();
+
+void llc_flush();
+
+void llc_disable();

sw/lib/dif/llc.c

@@ -0,0 +1,37 @@
+// Copyright 2022 ETH Zurich and University of Bologna.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Cyril Koenig <[email protected]>
+
+#include "dif/axi_llc.h"
+#include "regs/axi_llc.h"
+#include "util.h"
+#include "params.h"
+
+void llc_enable() {
+    *reg32(&__base_llc, AXI_LLC_CFG_SPM_LOW_REG_OFFSET ) = 0x00000000;
+    *reg32(&__base_llc, AXI_LLC_CFG_SPM_HIGH_REG_OFFSET) = 0x00000000;
+    fence();
+    *reg32(&__base_llc, AXI_LLC_COMMIT_CFG_REG_OFFSET) = 0x1;
+    fence();
+}
+
+void llc_flush() {
+    *reg32(&__base_llc, AXI_LLC_CFG_FLUSH_LOW_REG_OFFSET ) = 0xffffffff;
+    *reg32(&__base_llc, AXI_LLC_CFG_FLUSH_HIGH_REG_OFFSET) = 0xffffffff;
+    fence();
+    *reg32(&__base_llc, AXI_LLC_COMMIT_CFG_REG_OFFSET) = 0x1;
+    fence();
+    while(*reg32(&__base_llc, AXI_LLC_COMMIT_CFG_REG_OFFSET) != 0);
+}
+
+void llc_disable() {
+    *reg32(&__base_llc, AXI_LLC_CFG_SPM_LOW_REG_OFFSET ) = 0xffffffff;
+    *reg32(&__base_llc, AXI_LLC_CFG_SPM_HIGH_REG_OFFSET) = 0xffffffff;
+    *reg32(&__base_llc, AXI_LLC_CFG_FLUSH_LOW_REG_OFFSET ) = 0xffffffff;
+    *reg32(&__base_llc, AXI_LLC_CFG_FLUSH_HIGH_REG_OFFSET) = 0xffffffff;
+    fence();
+    *reg32(&__base_llc, AXI_LLC_COMMIT_CFG_REG_OFFSET) = 0x1;
+    fence();
+}