| 1 | /*
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| 2 | * Copyright (c) 2006 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup kernel_sparc64
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #include <smp/ipi.h>
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| 36 | #include <cpu.h>
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| 37 | #include <config.h>
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| 38 | #include <interrupt.h>
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| 39 | #include <arch/asm.h>
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| 40 | #include <arch/cpu.h>
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| 41 | #include <arch/sun4v/hypercall.h>
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| 42 | #include <arch/sun4v/ipi.h>
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| 43 |
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| 44 | #define IPI_MESSAGE_SIZE 8
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| 45 |
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| 46 | static uint64_t data[MAX_NUM_STRANDS][IPI_MESSAGE_SIZE]
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| 47 | __attribute__((aligned(64)));
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| 48 |
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| 49 | static uint16_t ipi_cpu_list[MAX_NUM_STRANDS][MAX_NUM_STRANDS];
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| 50 |
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| 51 | /**
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| 52 | * Sends an inter-processor interrupt to all virtual processors whose IDs are
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| 53 | * listed in the list.
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| 54 | *
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| 55 | * @param func address of the function to be invoked on the recipient
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| 56 | * @param cpu_list list of CPU IDs (16-bit identifiers) of the recipients
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| 57 | * @param list_size number of recipients (number of valid cpu_list entries)
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| 58 | *
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| 59 | * @return error code returned by the CPU_MONDO_SEND hypercall
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| 60 | */
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| 61 | uint64_t ipi_brodcast_to(void (*func)(void), uint16_t cpu_list[MAX_NUM_STRANDS],
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| 62 | uint64_t list_size)
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| 63 | {
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| 64 |
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| 65 | data[CPU->arch.id][0] = (uint64_t) func;
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| 66 |
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| 67 | unsigned int i;
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| 68 | for (i = 0; i < list_size; i++) {
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| 69 | ipi_cpu_list[CPU->arch.id][i] = cpu_list[i];
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| 70 | }
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| 71 |
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| 72 | return __hypercall_fast3(CPU_MONDO_SEND, list_size,
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| 73 | KA2PA(ipi_cpu_list[CPU->arch.id]), KA2PA(data[CPU->arch.id]));
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| 74 | }
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| 75 |
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| 76 | /**
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| 77 | * Send an inter-processor interrupt to a particular CPU.
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| 78 | *
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| 79 | * @param func address of the function to be invoked on the recipient
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| 80 | * @param cpu_is CPU ID (16-bit identifier) of the recipient
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| 81 | *
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| 82 | * @return error code returned by the CPU_MONDO_SEND hypercall
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| 83 | */
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| 84 | uint64_t ipi_unicast_to(void (*func)(void), uint16_t cpu_id)
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| 85 | {
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| 86 | ipi_cpu_list[CPU->arch.id][0] = cpu_id;
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| 87 | return ipi_brodcast_to(func, ipi_cpu_list[CPU->arch.id], 1);
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| 88 | }
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| 89 |
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| 90 | /*
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| 91 | * Deliver IPI to all processors except the current one.
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| 92 | *
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| 93 | * We assume that interrupts are disabled.
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| 94 | *
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| 95 | * @param ipi IPI number.
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| 96 | */
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| 97 | void ipi_broadcast_arch(int ipi)
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| 98 | {
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| 99 | void (*func)(void);
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| 100 |
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| 101 | switch (ipi) {
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| 102 | case IPI_TLB_SHOOTDOWN:
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| 103 | func = tlb_shootdown_ipi_recv;
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| 104 | break;
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| 105 | default:
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| 106 | panic("Unknown IPI (%d).\n", ipi);
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| 107 | break;
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| 108 | }
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| 109 |
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| 110 | unsigned int i;
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| 111 | unsigned idx = 0;
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| 112 | for (i = 0; i < config.cpu_active; i++) {
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| 113 | if (&cpus[i] == CPU) {
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| 114 | continue;
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| 115 | }
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| 116 |
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| 117 | ipi_cpu_list[CPU->id][idx] = (uint16_t) cpus[i].id;
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| 118 | idx++;
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| 119 | }
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| 120 |
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| 121 | ipi_brodcast_to(func, ipi_cpu_list[CPU->arch.id], idx);
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| 122 | }
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| 123 |
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| 124 | /** @}
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| 125 | */
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