| 1 | /*
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| 2 | * Copyright (c) 2009 Pavel Rimsky
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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 sparc64interrupt
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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 <arch/interrupt.h>
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| 36 | #include <arch/trap/interrupt.h>
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| 37 | #include <arch/sparc64.h>
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| 38 | #include <interrupt.h>
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| 39 | #include <ddi/irq.h>
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| 40 | #include <arch/types.h>
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| 41 | #include <debug.h>
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| 42 | #include <arch/asm.h>
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| 43 | #include <arch/barrier.h>
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| 44 | #include <print.h>
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| 45 | #include <arch.h>
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| 46 | #include <mm/tlb.h>
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| 47 | #include <config.h>
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| 48 | #include <synch/spinlock.h>
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| 49 | #include <arch/sun4v/hypercall.h>
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| 50 |
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| 51 | /** number of uint64_t-s in one CPU mondo message */
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| 52 | #define CPU_MONDO_ENTRY_SIZE 8
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| 53 |
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| 54 | /** number of entries (messages) in the CPU mondo queue */
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| 55 | #define CPU_MONDO_NENTRIES 8
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| 56 |
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| 57 | /** number of uint64_t-s in the CPU mondo queue */
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| 58 | #define CPU_MONDO_QUEUE_SIZE ((CPU_MONDO_NENTRIES) * (CPU_MONDO_ENTRY_SIZE))
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| 59 |
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| 60 | /** used to identify CPU mondo queue in the hypercall */
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| 61 | #define CPU_MONDO_QUEUE_ID 0x3c
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| 62 |
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| 63 | /** ASI for reading/writing CPU mondo head/tail registers */
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| 64 | #define ASI_QUEUE 0x25
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| 65 |
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| 66 | /** VA for reading the CPU mondo tail */
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| 67 | #define VA_CPU_MONDO_QUEUE_TAIL 0x3c8
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| 68 |
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| 69 | /** VA for reading/writing the CPU mondo head */
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| 70 | #define VA_CPU_MONDO_QUEUE_HEAD 0x3c0
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| 71 |
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| 72 | /**
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| 73 | * array which contains CPU mondo queue for every CPU
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| 74 | */
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| 75 | uint64_t cpu_mondo_queues[MAX_NUM_STRANDS][CPU_MONDO_QUEUE_SIZE]
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| 76 | __attribute__((aligned(
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| 77 | CPU_MONDO_QUEUE_SIZE * sizeof(uint64_t))));
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| 78 |
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| 79 | /**
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| 80 | * Initializes CPU mondo queue for the current CPU.
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| 81 | */
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| 82 | void sun4v_ipi_init(void)
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| 83 | {
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| 84 | if (__hypercall_fast3(
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| 85 | CPU_QCONF,
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| 86 | CPU_MONDO_QUEUE_ID,
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| 87 | KA2PA(cpu_mondo_queues[CPU->id]),
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| 88 | CPU_MONDO_NENTRIES) != HV_EOK)
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| 89 | panic("Initializing mondo queue failed on CPU %d.\n",
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| 90 | CPU->arch.id);
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| 91 | }
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| 92 |
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| 93 | /**
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| 94 | * Handler of the CPU Mondo trap. Reads the message queue, updates the head
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| 95 | * register and processes the message (invokes a function call).
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| 96 | */
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| 97 | void cpu_mondo(void)
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| 98 | {
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| 99 | #ifdef CONFIG_SMP
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| 100 | unsigned int tail = asi_u64_read(ASI_QUEUE, VA_CPU_MONDO_QUEUE_TAIL);
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| 101 | unsigned int head = asi_u64_read(ASI_QUEUE, VA_CPU_MONDO_QUEUE_HEAD);
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| 102 |
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| 103 | while (head != tail) {
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| 104 | uint64_t data1 = cpu_mondo_queues[CPU->id][0];
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| 105 |
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| 106 | head = (head + CPU_MONDO_ENTRY_SIZE * sizeof(uint64_t)) %
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| 107 | (CPU_MONDO_QUEUE_SIZE * sizeof(uint64_t));
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| 108 | asi_u64_write(ASI_QUEUE, VA_CPU_MONDO_QUEUE_HEAD, head);
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| 109 |
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| 110 | if (data1 == (uintptr_t) tlb_shootdown_ipi_recv) {
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| 111 | ((void (*)(void)) data1)();
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| 112 | } else {
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| 113 | printf("Spurious interrupt on %d, data = %lx.\n",
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| 114 | CPU->arch.id, data1);
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| 115 | }
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| 116 | }
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| 117 | #endif
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| 118 | }
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| 119 |
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| 120 | /** @}
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| 121 | */
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