Subversion Repositories HelenOS

Rev

Rev 3674 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1903 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2006 Jakub Jermar
1903 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup sparc64
30
 * @{
31
 */
32
/** @file
33
 */
34
 
35
#include <smp/ipi.h>
1904 jermar 36
#include <cpu.h>
2089 decky 37
#include <arch.h>
1904 jermar 38
#include <arch/cpu.h>
39
#include <arch/asm.h>
40
#include <config.h>
41
#include <mm/tlb.h>
42
#include <arch/interrupt.h>
43
#include <arch/trap/interrupt.h>
44
#include <arch/barrier.h>
45
#include <preemption.h>
46
#include <time/delay.h>
47
#include <panic.h>
1903 jermar 48
 
3674 svoboda 49
/** Set the contents of the outgoing interrupt vector data.
50
 *
51
 * The first data item (data 0) will be set to the value of func, the
52
 * rest of the vector will contain zeros.
53
 *
54
 * This is a helper function used from within the cross_call function.
55
 *
56
 * @param func value the first data item of the vector will be set to
57
 */
58
static inline void set_intr_w_data(void (* func)(void))
59
{
60
#if defined (US)
61
    asi_u64_write(ASI_INTR_W, ASI_UDB_INTR_W_DATA_0, (uintptr_t) func);
62
    asi_u64_write(ASI_INTR_W, ASI_UDB_INTR_W_DATA_1, 0);
63
    asi_u64_write(ASI_INTR_W, ASI_UDB_INTR_W_DATA_2, 0);
64
#elif defined (US3)
65
    asi_u64_write(ASI_INTR_W, VA_INTR_W_DATA_0, (uintptr_t) func);
66
    asi_u64_write(ASI_INTR_W, VA_INTR_W_DATA_1, 0);
67
    asi_u64_write(ASI_INTR_W, VA_INTR_W_DATA_2, 0);
68
    asi_u64_write(ASI_INTR_W, VA_INTR_W_DATA_3, 0);
69
    asi_u64_write(ASI_INTR_W, VA_INTR_W_DATA_4, 0);
70
    asi_u64_write(ASI_INTR_W, VA_INTR_W_DATA_5, 0);
71
    asi_u64_write(ASI_INTR_W, VA_INTR_W_DATA_6, 0);
72
    asi_u64_write(ASI_INTR_W, VA_INTR_W_DATA_7, 0);
73
#endif
74
}
75
 
1904 jermar 76
/** Invoke function on another processor.
77
 *
78
 * Currently, only functions without arguments are supported.
79
 * Supporting more arguments in the future should be no big deal.
80
 *
81
 * Interrupts must be disabled prior to this call.
82
 *
83
 * @param mid MID of the target processor.
84
 * @param func Function to be invoked.
85
 */
86
static void cross_call(int mid, void (* func)(void))
87
{
88
    uint64_t status;
89
    bool done;
90
 
91
    /*
2048 jermar 92
     * This function might enable interrupts for a while.
1904 jermar 93
     * In order to prevent migration to another processor,
94
     * we explicitly disable preemption.
95
     */
96
 
97
    preemption_disable();
98
 
99
    status = asi_u64_read(ASI_INTR_DISPATCH_STATUS, 0);
100
    if (status & INTR_DISPATCH_STATUS_BUSY)
4339 svoboda 101
        panic("Interrupt Dispatch Status busy bit set.");
1904 jermar 102
 
3674 svoboda 103
    ASSERT(!(pstate_read() & PSTATE_IE_BIT));
104
 
1904 jermar 105
    do {
3674 svoboda 106
        set_intr_w_data(func);
107
        asi_u64_write(ASI_INTR_W,
2134 jermar 108
            (mid << INTR_VEC_DISPATCH_MID_SHIFT) |
3674 svoboda 109
            VA_INTR_W_DISPATCH, 0);
1904 jermar 110
 
111
        membar();
112
 
113
        do {
114
            status = asi_u64_read(ASI_INTR_DISPATCH_STATUS, 0);
115
        } while (status & INTR_DISPATCH_STATUS_BUSY);
116
 
117
        done = !(status & INTR_DISPATCH_STATUS_NACK);
118
        if (!done) {
119
            /*
120
             * Prevent deadlock.
121
             */        
122
            (void) interrupts_enable();
123
            delay(20 + (tick_read() & 0xff));
124
            (void) interrupts_disable();
125
        }
126
    } while (done);
127
 
128
    preemption_enable();
129
}
130
 
131
/*
132
 * Deliver IPI to all processors except the current one.
133
 *
134
 * The sparc64 architecture does not support any group addressing
135
 * which is found, for instance, on ia32 and amd64. Therefore we
136
 * need to simulate the broadcast by sending the message to
137
 * all target processors step by step.
138
 *
139
 * We assume that interrupts are disabled.
140
 *
141
 * @param ipi IPI number.
142
 */
1903 jermar 143
void ipi_broadcast_arch(int ipi)
144
{
2745 decky 145
    unsigned int i;
1904 jermar 146
 
147
    void (* func)(void);
148
 
149
    switch (ipi) {
150
    case IPI_TLB_SHOOTDOWN:
151
        func = tlb_shootdown_ipi_recv;
152
        break;
153
    default:
4339 svoboda 154
        panic("Unknown IPI (%d).", ipi);
1904 jermar 155
        break;
156
    }
157
 
158
    /*
159
     * As long as we don't support hot-plugging
160
     * or hot-unplugging of CPUs, we can walk
161
     * the cpus array and read processor's MID
162
     * without locking.
163
     */
164
 
165
    for (i = 0; i < config.cpu_active; i++) {
166
        if (&cpus[i] == CPU)
167
            continue;       /* skip the current CPU */
168
 
169
        cross_call(cpus[i].arch.mid, func);
170
    }
1903 jermar 171
}
172
 
173
/** @}
174
 */