/*

 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2012, 2013 SAP SE. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

#ifndef CPU_PPC_VM_ICACHE_PPC_HPP

#define CPU_PPC_VM_ICACHE_PPC_HPP

// Interface for updating the instruction cache.  Whenever the VM modifies

// code, part of the processor instruction cache potentially has to be flushed.

class ICache : public AbstractICache {

  friend class ICacheStubGenerator;

  static int ppc64_flush_icache(address start, int lines, int magic);

 public:

  enum {

    // Actually, cache line size is 64, but keeping it as it is to be

    // on the safe side on ALL PPC64 implementations.

    log2_line_size = 5,

    line_size      = 1 << log2_line_size

  };

  static void ppc64_flush_icache_bytes(address start, int bytes) {

    // Align start address to an icache line boundary and transform

    // nbytes to an icache line count.

    const uint line_offset = mask_address_bits(start, line_size - 1);

    ppc64_flush_icache(start - line_offset, (bytes + line_offset + line_size - 1) >> log2_line_size, 0);

  }

};

#endif // CPU_PPC_VM_ICACHE_PPC_HPP