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885 decky 1
/*
2071 jermar 2
 * Copyright (c) 2005 Martin Decky
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 * Copyright (c) 2006 Jakub Jermar
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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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/**
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 * @file
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 * @brief   Architecture dependent parts of OpenFirmware interface.
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 */
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#include <ofwarch.h>  
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#include <ofw.h>
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#include <printf.h>
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#include <string.h>
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#include <register.h>
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#include "main.h"
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#include "asm.h"
885 decky 42
 
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/* these tho variables will be set by the detect_subarchitecture function */
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extern uint8_t subarchitecture;
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extern uint16_t mid_mask;
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void write(const char *str, const int len)
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{
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    int i;
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    for (i = 0; i < len; i++) {
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        if (str[i] == '\n')
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            ofw_write("\r", 1);
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        ofw_write(&str[i], 1);
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    }
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}
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int ofw_translate_failed(ofw_arg_t flag)
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{
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    return flag != -1;
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}
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3672 jermar 63
/**
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 * Starts all CPUs represented by following siblings of the given node,
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 * except for the current CPU.
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 *
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 * @param child     The first child of the OFW tree node whose children
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 *          represent CPUs to be woken up.
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 * @param current_mid   MID of the current CPU, the current CPU will
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 *          (of course) not be woken up.
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 * @return      Number of CPUs which have the same parent node as
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 *          "child".
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 */
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static int wake_cpus_in_node(phandle child, uint64_t current_mid)
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{
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    int cpus;
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    char type_name[BUF_SIZE];
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    for (cpus = 0; child != 0 && child != -1;
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        child = ofw_get_peer_node(child), cpus++) {
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        if (ofw_get_property(child, "device_type", type_name,
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            sizeof(type_name)) > 0) {
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            if (strcmp(type_name, "cpu") == 0) {
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                uint32_t mid;
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                /*
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                 * "upa-portid" for US, "portid" for US-III,
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                 * "cpuid" for US-IV
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                 */
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                if (ofw_get_property(
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                    child, "upa-portid",
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                    &mid, sizeof(mid)) <= 0
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                    && ofw_get_property(child, "portid",
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                    &mid, sizeof(mid)) <= 0
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                    && ofw_get_property(child, "cpuid",
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                    &mid, sizeof(mid)) <= 0)
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                    continue;
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                if (current_mid != mid) {
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                    /*
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                     * Start secondary processor.
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                     */
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                    (void) ofw_call("SUNW,start-cpu", 3, 1,
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                        NULL, child, KERNEL_VIRTUAL_ADDRESS,
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                        bootinfo.physmem_start |
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                        AP_PROCESSOR);
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                }
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            }
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        }
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    }
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    return cpus;
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}
1978 jermar 114
 
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/**
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 * Finds out the current CPU's MID and wakes up all AP processors.
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 */
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int ofw_cpu(void)
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{
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    int cpus;
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    phandle node;
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    phandle subnode;
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    phandle cpus_parent;
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    phandle cmp;
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    char name[BUF_SIZE];
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    /* get the current CPU MID */
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    uint64_t current_mid;
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    asm volatile ("ldxa [%1] %2, %0\n"
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        : "=r" (current_mid)
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        : "r" (0), "i" (ASI_ICBUS_CONFIG));
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    current_mid >>= ICBUS_CONFIG_MID_SHIFT;
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    current_mid &= mid_mask;
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    /* wake up CPUs */
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    cpus_parent = ofw_find_device("/ssm@0,0");
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    if (cpus_parent == 0 || cpus_parent == -1) {
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        cpus_parent = ofw_find_device("/");
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    }
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    node = ofw_get_child_node(cpus_parent);
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    cpus = wake_cpus_in_node(node, current_mid);
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    while (node != 0 && node != -1) {
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        if (ofw_get_property(node, "name", name,
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            sizeof(name)) > 0) {
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            if (strcmp(name, "cmp") == 0) {
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                subnode = ofw_get_child_node(node);
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                cpus += wake_cpus_in_node(subnode,
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                    current_mid);
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            }
154
        }
155
        node = ofw_get_peer_node(node);
156
    }
157
 
158
    return cpus;
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160
}
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1978 jermar 162
/** Get physical memory starting address.
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 *
3672 jermar 164
 * @param start     Pointer to variable where the physical memory starting
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 *          address will be stored.
1978 jermar 166
 *
3672 jermar 167
 * @return      Non-zero on succes, zero on failure.
1978 jermar 168
 */
169
int ofw_get_physmem_start(uintptr_t *start)
170
{
171
    uint32_t memreg[4];
172
 
173
    if (ofw_get_property(ofw_memory, "reg", &memreg, sizeof(memreg)) <= 0)
174
        return 0;
175
 
176
    *start = (((uint64_t) memreg[0]) << 32) | memreg[1];
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    return 1;
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}
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