source: mainline/kernel/arch/sparc64/src/cpu/cpu.c@ 92778f2

/*
 * Copyright (C) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup sparc64
 * @{
 */
/** @file
 */

#include <arch/asm.h>
#include <cpu.h>
#include <arch.h>
#include <print.h>
#include <arch/register.h>
#include <genarch/ofw/ofw_tree.h>
#include <arch/types.h>
#include <arch/drivers/tick.h>
#include <arch/mm/page.h>
#include <arch/mm/tlb.h>
#include <macros.h>

/** Perform sparc64 specific initialization of the processor structure for the current processor. */
void cpu_arch_init(void)
{
        ofw_tree_node_t *node;
        uint32_t mid;
        uint32_t clock_frequency = 0;
        upa_config_t upa_config;
        
        upa_config.value = upa_config_read();
        CPU->arch.mid = upa_config.mid;
        
        /*
         * Detect processor frequency.
         */
        node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");
        while (node) {
                ofw_tree_property_t *prop;
                
                prop = ofw_tree_getprop(node, "upa-portid");
                if (prop && prop->value) {
                        mid = *((uint32_t *) prop->value);
                        if (mid == CPU->arch.mid) {
                                prop = ofw_tree_getprop(node, "clock-frequency");
                                if (prop && prop->value)
                                        clock_frequency = *((uint32_t *) prop->value);
                        }
                }
                node = ofw_tree_find_peer_by_device_type(node, "cpu");
        }

        CPU->arch.clock_frequency = clock_frequency;
        tick_init();
        
        /*
         * Lock CPU stack in DTLB.
         */
        uintptr_t base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
                 
        if (!overlaps((uintptr_t) CPU->stack, PAGE_SIZE, base, (1<<KERNEL_PAGE_WIDTH))) {
                /*
                 * Kernel stack of this processor is not locked in DTLB.
                 * First, demap any already existing mappings.
                 * Second, create a locked mapping for it.
                 */
                dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (uintptr_t) CPU->stack);
                dtlb_insert_mapping((uintptr_t) CPU->stack, KA2PA(CPU->stack), PAGESIZE_8K, true, true);
        }

        /*
         * Set the D-cache active flag.
         * Needed for the D-cache to work.
         */
        CPU->arch.dcache_active = 1;
}

/** Read version information from the current processor. */
void cpu_identify(void)
{
        CPU->arch.ver.value = ver_read();
}

/** Print version information for a processor.
 *
 * This function is called by the bootstrap processor.
 *
 * @param m Processor structure of the CPU for which version information is to be printed.
 */
void cpu_print_report(cpu_t *m)
{
        char *manuf, *impl;

        switch (m->arch.ver.manuf) {
        case MANUF_FUJITSU:
                manuf = "Fujitsu";
                break;
        case MANUF_ULTRASPARC:
                manuf = "UltraSPARC";
                break;
        case MANUF_SUN:
                manuf = "Sun";
                break;
        default:
                manuf = "Unknown";
                break;
        }
        
        switch (CPU->arch.ver.impl) {
        case IMPL_ULTRASPARCI:
                impl = "UltraSPARC I";
                break;
        case IMPL_ULTRASPARCII:
                impl = "UltraSPARC II";
                break;
        case IMPL_ULTRASPARCII_I:
                impl = "UltraSPARC IIi";
                break;
        case IMPL_ULTRASPARCII_E:
                impl = "UltraSPARC IIe";
                break;
        case IMPL_ULTRASPARCIII:
                impl = "UltraSPARC III";
                break;
        case IMPL_ULTRASPARCIV_PLUS:
                impl = "UltraSPARC IV+";
                break;
        case IMPL_SPARC64V:
                impl = "SPARC 64V";
                break;
        default:
                impl = "Unknown";
                break;
        }

        printf("cpu%d: manuf=%s, impl=%s, mask=%d (%dMHz)\n",
                m->id, manuf, impl, m->arch.ver.mask, m->arch.clock_frequency/1000000);
}

/** @}
 */