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33 jermar 1
/*
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 * Copyright (C) 2005 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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1266 jermar 29
/**
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 * @file    madt.c
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 * @brief   Multiple APIC Description Table (MADT) parsing.
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 */
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34 jermar 34
#include <arch/types.h>
129 jermar 35
#include <typedefs.h>
452 decky 36
#include <genarch/acpi/acpi.h>
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#include <genarch/acpi/madt.h>
34 jermar 38
#include <arch/smp/apic.h>
129 jermar 39
#include <arch/smp/smp.h>
127 jermar 40
#include <panic.h>
129 jermar 41
#include <debug.h>
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#include <config.h>
195 vana 43
#include <print.h>
814 palkovsky 44
#include <mm/slab.h>
310 bondari 45
#include <memstr.h>
331 bondari 46
#include <sort.h>
33 jermar 47
 
48
struct acpi_madt *acpi_madt = NULL;
34 jermar 49
 
458 decky 50
#ifdef CONFIG_SMP
34 jermar 51
 
512 jermar 52
/** Standard ISA IRQ map; can be overriden by Interrupt Source Override entries of MADT. */
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int isa_irq_map[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
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310 bondari 55
static void madt_l_apic_entry(struct madt_l_apic *la, __u32 index);
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static void madt_io_apic_entry(struct madt_io_apic *ioa, __u32 index);
512 jermar 57
static void madt_intr_src_ovrd_entry(struct madt_intr_src_ovrd *override, __u32 index);
331 bondari 58
static int madt_cmp(void * a, void * b);
127 jermar 59
 
60
struct madt_l_apic *madt_l_apic_entries = NULL;
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struct madt_io_apic *madt_io_apic_entries = NULL;
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370 jermar 63
index_t madt_l_apic_entry_index = 0;
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index_t madt_io_apic_entry_index = 0;
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count_t madt_l_apic_entry_cnt = 0;
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count_t madt_io_apic_entry_cnt = 0;
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count_t cpu_count = 0;
127 jermar 68
 
310 bondari 69
struct madt_apic_header * * madt_entries_index = NULL;
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int madt_entries_index_cnt = 0;
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34 jermar 72
char *entry[] = {
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    "L_APIC",
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    "IO_APIC",
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    "INTR_SRC_OVRD",
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    "NMI_SRC",
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    "L_APIC_NMI",
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    "L_APIC_ADDR_OVRD",
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    "IO_SAPIC",
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    "L_SAPIC",
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    "PLATFORM_INTR_SRC"
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};
83
 
129 jermar 84
/*
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 * ACPI MADT Implementation of SMP configuration interface.
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 */
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static count_t madt_cpu_count(void);
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static bool madt_cpu_enabled(index_t i);
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static bool madt_cpu_bootstrap(index_t i);
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static __u8 madt_cpu_apic_id(index_t i);
512 jermar 91
static int madt_irq_to_pin(int irq);
129 jermar 92
 
93
struct smp_config_operations madt_config_operations = {
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    .cpu_count = madt_cpu_count,
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    .cpu_enabled = madt_cpu_enabled,
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    .cpu_bootstrap = madt_cpu_bootstrap,
512 jermar 97
    .cpu_apic_id = madt_cpu_apic_id,
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    .irq_to_pin = madt_irq_to_pin
129 jermar 99
};
100
 
512 jermar 101
count_t madt_cpu_count(void)
129 jermar 102
{
103
    return madt_l_apic_entry_cnt;
104
}
105
 
512 jermar 106
bool madt_cpu_enabled(index_t i)
129 jermar 107
{
108
    ASSERT(i < madt_l_apic_entry_cnt);
310 bondari 109
    return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->flags & 0x1;
110
 
129 jermar 111
}
112
 
512 jermar 113
bool madt_cpu_bootstrap(index_t i)
129 jermar 114
{
115
    ASSERT(i < madt_l_apic_entry_cnt);
310 bondari 116
    return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->apic_id == l_apic_id();
129 jermar 117
}
118
 
512 jermar 119
__u8 madt_cpu_apic_id(index_t i)
129 jermar 120
{
121
    ASSERT(i < madt_l_apic_entry_cnt);
310 bondari 122
    return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->apic_id;
129 jermar 123
}
124
 
512 jermar 125
int madt_irq_to_pin(int irq)
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{
127
    ASSERT(irq < sizeof(isa_irq_map)/sizeof(int));
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        return isa_irq_map[irq];
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}
130
 
331 bondari 131
int madt_cmp(void * a, void * b)
132
{
349 jermar 133
    return
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        (((struct madt_apic_header *) a)->type > ((struct madt_apic_header *) b)->type) ?
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        1 :
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        ((((struct madt_apic_header *) a)->type < ((struct madt_apic_header *) b)->type) ? -1 : 0);
331 bondari 137
}
138
 
34 jermar 139
void acpi_madt_parse(void)
140
{
141
    struct madt_apic_header *end = (struct madt_apic_header *) (((__u8 *) acpi_madt) + acpi_madt->header.length);
310 bondari 142
    struct madt_apic_header *h;
311 bondari 143
 
144
        l_apic = (__u32 *) (__native) acpi_madt->l_apic_address;
34 jermar 145
 
310 bondari 146
    /* calculate madt entries */
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    for (h = &acpi_madt->apic_header[0]; h < end; h = (struct madt_apic_header *) (((__u8 *) h) + h->length)) {
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        madt_entries_index_cnt++;
149
    }
127 jermar 150
 
310 bondari 151
    /* create madt apic entries index array */
822 palkovsky 152
    madt_entries_index = (struct madt_apic_header * *) malloc(madt_entries_index_cnt * sizeof(struct madt_apic_header * *), FRAME_ATOMIC);
153
    if (!madt_entries_index)
154
        panic("Memory allocation error.");
34 jermar 155
 
310 bondari 156
    __u32 index = 0;
157
 
158
    for (h = &acpi_madt->apic_header[0]; h < end; h = (struct madt_apic_header *) (((__u8 *) h) + h->length)) {
159
        madt_entries_index[index++] = h;
160
    }
161
 
331 bondari 162
    /* Quicksort MADT index structure */
163
    qsort(madt_entries_index, madt_entries_index_cnt, sizeof(__address), &madt_cmp);
310 bondari 164
 
165
    /* Parse MADT entries */   
166
    for (index = 0; index < madt_entries_index_cnt - 1; index++) {
167
        h = madt_entries_index[index];
34 jermar 168
        switch (h->type) {
169
            case MADT_L_APIC:
310 bondari 170
                madt_l_apic_entry((struct madt_l_apic *) h, index);
127 jermar 171
                break;
34 jermar 172
            case MADT_IO_APIC:
310 bondari 173
                madt_io_apic_entry((struct madt_io_apic *) h, index);
127 jermar 174
                break;
34 jermar 175
            case MADT_INTR_SRC_OVRD:
512 jermar 176
                madt_intr_src_ovrd_entry((struct madt_intr_src_ovrd *) h, index);
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                break;
34 jermar 178
            case MADT_NMI_SRC:
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            case MADT_L_APIC_NMI:
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            case MADT_L_APIC_ADDR_OVRD:
181
            case MADT_IO_SAPIC:
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            case MADT_L_SAPIC:
183
            case MADT_PLATFORM_INTR_SRC:
1196 cejka 184
                printf("MADT: skipping %s entry (type=%zd)\n", entry[h->type], h->type);
34 jermar 185
                break;
186
 
187
            default:
188
                if (h->type >= MADT_RESERVED_SKIP_BEGIN && h->type <= MADT_RESERVED_SKIP_END) {
1196 cejka 189
                    printf("MADT: skipping reserved entry (type=%zd)\n", h->type);
34 jermar 190
                }
191
                if (h->type >= MADT_RESERVED_OEM_BEGIN) {
1196 cejka 192
                    printf("MADT: skipping OEM entry (type=%zd)\n", h->type);
34 jermar 193
                }
194
                break;
195
        }
310 bondari 196
 
197
 
34 jermar 198
    }
310 bondari 199
 
34 jermar 200
 
370 jermar 201
    if (cpu_count)
202
        config.cpu_count = cpu_count;
34 jermar 203
}
127 jermar 204
 
310 bondari 205
 
206
void madt_l_apic_entry(struct madt_l_apic *la, __u32 index)
127 jermar 207
{
310 bondari 208
    if (!madt_l_apic_entry_cnt++) {
209
        madt_l_apic_entry_index = index;
210
    }
127 jermar 211
 
212
    if (!(la->flags & 0x1)) {
213
        /* Processor is unusable, skip it. */
214
        return;
215
    }
370 jermar 216
 
217
    cpu_count++;   
127 jermar 218
    apic_id_mask |= 1<<la->apic_id;
219
}
220
 
310 bondari 221
void madt_io_apic_entry(struct madt_io_apic *ioa, __u32 index)
127 jermar 222
{
223
    if (!madt_io_apic_entry_cnt++) {
310 bondari 224
        /* remember index of the first io apic entry */
225
        madt_io_apic_entry_index = index;
268 palkovsky 226
        io_apic = (__u32 *) (__native) ioa->io_apic_address;
310 bondari 227
    } else {
127 jermar 228
        /* currently not supported */
229
        return;
230
    }
231
}
232
 
512 jermar 233
void madt_intr_src_ovrd_entry(struct madt_intr_src_ovrd *override, __u32 index)
234
{
235
    ASSERT(override->source < sizeof(isa_irq_map)/sizeof(int));
1196 cejka 236
    printf("MADT: ignoring %s entry: bus=%zd, source=%zd, global_int=%zd, flags=%#hX\n",
515 jermar 237
        entry[override->header.type], override->bus, override->source,
238
        override->global_int, override->flags);
512 jermar 239
}
127 jermar 240
 
458 decky 241
#endif /* CONFIG_SMP */