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4638 rimsky 1
/*
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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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/** @addtogroup sparc64
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 * @{
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 */
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/** @file
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 */
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#include <smp/ipi.h>
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#include <cpu.h>
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#include <config.h>
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#include <interrupt.h>
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#include <arch/asm.h>
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#include <arch/cpu.h>
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#include <arch/sun4v/hypercall.h>
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#include <arch/sun4v/ipi.h>
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#define IPI_MESSAGE_SIZE    8
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static uint64_t data[MAX_NUM_STRANDS][IPI_MESSAGE_SIZE]
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    __attribute__ ((aligned (64)));
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static uint16_t ipi_cpu_list[MAX_NUM_STRANDS][MAX_NUM_STRANDS];
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/**
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 * Sends an inter-processor interrupt to all virtual processors whose IDs are
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 * listed in the list.
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 *
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 * @param func      address of the function to be invoked on the recipient
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 * @param cpu_list  list of CPU IDs (16-bit identifiers) of the recipients
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 * @param list_size number of recipients (number of valid cpu_list entries)
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 *
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 * @return      error code returned by the CPU_MONDO_SEND hypercall
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 */
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uint64_t ipi_brodcast_to(void (*func)(void), uint16_t cpu_list[MAX_NUM_STRANDS],
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        uint64_t list_size) {
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    data[CPU->arch.id][0] = (uint64_t) func;
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    unsigned int i;
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    for (i = 0; i < list_size; i++) {
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        ipi_cpu_list[CPU->arch.id][i] = cpu_list[i];
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    }
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    return __hypercall_fast3(CPU_MONDO_SEND, list_size,
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        KA2PA(ipi_cpu_list[CPU->arch.id]), KA2PA(data[CPU->arch.id]));
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}
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/**
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 * Send an inter-processor interrupt to a particular CPU.
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 *
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 * @param func      address of the function to be invoked on the recipient
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 * @param cpu_is    CPU ID (16-bit identifier) of the recipient
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 *
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 * @return      error code returned by the CPU_MONDO_SEND hypercall
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 */
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uint64_t ipi_unicast_to(void (*func)(void), uint16_t cpu_id) {
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    ipi_cpu_list[CPU->arch.id][0] = cpu_id;
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    return ipi_brodcast_to(func, ipi_cpu_list[CPU->arch.id], 1);
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}
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/*
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 * Deliver IPI to all processors except the current one.
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 *
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 * We assume that interrupts are disabled.
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 *
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 * @param ipi IPI number.
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 */
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void ipi_broadcast_arch(int ipi)
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{
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    void (* func)(void);
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    switch (ipi) {
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    case IPI_TLB_SHOOTDOWN:
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        func = tlb_shootdown_ipi_recv;
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        break;
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    default:
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        panic("Unknown IPI (%d).\n", ipi);
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        break;
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    }
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    unsigned int i;
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    unsigned idx = 0;
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    for (i = 0; i < config.cpu_active; i++) {
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        if (&cpus[i] == CPU) {
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            continue;
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        }
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        ipi_cpu_list[CPU->id][idx] = (uint16_t) cpus[i].id;
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        idx++;
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    }
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    ipi_brodcast_to(func, ipi_cpu_list[CPU->arch.id], idx);
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}
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/** @}
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 */