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3771 rimsky 1 
/*
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 * Copyright (c) 2005 Jakub Jermar
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 * Copyright (c) 2009 Pavel Rimsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup sparc64
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 * @{
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 */
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/** @file
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 */
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#include <cpu.h>
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#include <arch.h>
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#include <genarch/ofw/ofw_tree.h>
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#include <arch/drivers/tick.h>
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#include <print.h>
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#include <arch/cpu_node.h>
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#include <arch/sun4v/md.h>
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#include <arch/sun4v/hypercall.h>
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/** Perform sparc64 specific initialization of the processor structure for the
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 * current processor.
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 */
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void cpu_arch_init(void)
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{
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    uint64_t myid;
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    __hypercall_fast_ret1(0, 0, 0, 0, 0, CPU_MYID, &myid);
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    CPU->arch.id = myid;
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    md_node_t node = md_get_root();
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    /* walk through MD, find the current CPU node & its clock-frequency */
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    while (true) {
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        if (!md_next_node(&node, "cpu")) {
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            panic("Could not determine CPU frequency.");
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        }
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        uint64_t id = 0;
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        md_get_integer_property(node, "id", &id);
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        if (id == myid) {
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            uint64_t clock_frequency = 0;
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            md_get_integer_property(node, "clock-frequency",
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                &clock_frequency);
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            CPU->arch.clock_frequency = clock_frequency;
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            break;
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        }
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    }
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    tick_init();
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}
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/**
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 * Implemented as an empty function as accessing the VER register is
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 * a hyperprivileged operation on sun4v.
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 */
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void cpu_identify(void)
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{
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}
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/** Print version information for a processor.
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 *
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 * This function is called by the bootstrap processor.
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 *
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 * @param m Processor structure of the CPU for which version information is to
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 *  be printed.
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 */
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void cpu_print_report(cpu_t *m)
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{
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    printf("cpu%d: Niagara (%d MHz)\n", m->id,
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        m->arch.clock_frequency / 1000000);
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}
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/** @}
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 */