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1 jermar 1
/*
2
 * Copyright (C) 2001-2004 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
18
 * 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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
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1248 jermar 29
/**
30
 * @file    main.c
31
 * @brief   Main initialization kernel function for all processors.
32
 *
33
 * During kernel boot, all processors, after architecture dependent
34
 * initialization, start executing code found in this file. After
35
 * bringing up all subsystems, control is passed to scheduler().
36
 *
37
 * The bootstrap processor starts executing main_bsp() while
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 * the application processors start executing main_ap().
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 *
40
 * @see scheduler()
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 * @see main_bsp()
42
 * @see main_ap()
43
 */
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1 jermar 45
#include <arch/asm.h>
97 jermar 46
#include <context.h>
1 jermar 47
#include <print.h>
68 decky 48
#include <panic.h>
561 decky 49
#include <debug.h>
1 jermar 50
#include <config.h>
51
#include <time/clock.h>
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#include <proc/scheduler.h>
53
#include <proc/thread.h>
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#include <proc/task.h>
55
#include <main/kinit.h>
675 jermar 56
#include <main/version.h>
518 jermar 57
#include <console/kconsole.h>
1 jermar 58
#include <cpu.h>
402 jermar 59
#include <align.h>
578 palkovsky 60
#include <interrupt.h>
146 cejka 61
#include <arch/mm/memory_init.h>
1 jermar 62
#include <mm/frame.h>
63
#include <mm/page.h>
684 jermar 64
#include <genarch/mm/page_pt.h>
5 jermar 65
#include <mm/tlb.h>
703 jermar 66
#include <mm/as.h>
759 palkovsky 67
#include <mm/slab.h>
1 jermar 68
#include <synch/waitq.h>
1109 jermar 69
#include <synch/futex.h>
210 decky 70
#include <arch/arch.h>
1 jermar 71
#include <arch.h>
76 jermar 72
#include <arch/faddr.h>
106 jermar 73
#include <typedefs.h>
955 palkovsky 74
#include <ipc/ipc.h>
1063 palkovsky 75
#include <macros.h>
1164 jermar 76
#include <adt/btree.h>
1595 palkovsky 77
#include <console/klog.h>
106 jermar 78
 
675 jermar 79
#ifdef CONFIG_SMP
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#include <arch/smp/apic.h>
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#include <arch/smp/mps.h>
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#endif /* CONFIG_SMP */
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#include <smp/smp.h>
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1315 jermar 85
/** Global configuration structure. */
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config_t config = {
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    .mm_initialized = false
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};
675 jermar 89
 
1315 jermar 90
/** Initial user-space tasks */
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init_t init = {
92
 
93
};
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1 jermar 95
context_t ctx;
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523 jermar 97
/**
98
 * These 'hardcoded' variables will be intialized by
105 jermar 99
 * the linker or the low level assembler code with
100
 * appropriate sizes and addresses.
1 jermar 101
 */
37 jermar 102
__address hardcoded_load_address = 0;
106 jermar 103
size_t hardcoded_ktext_size = 0;
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size_t hardcoded_kdata_size = 0;
1 jermar 105
 
106
void main_bsp(void);
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void main_ap(void);
108
 
109
/*
110
 * These two functions prevent stack from underflowing during the
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 * kernel boot phase when SP is set to the very top of the reserved
112
 * space. The stack could get corrupted by a fooled compiler-generated
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 * pop sequence otherwise.
114
 */
115
static void main_bsp_separated_stack(void);
625 palkovsky 116
#ifdef CONFIG_SMP
1 jermar 117
static void main_ap_separated_stack(void);
625 palkovsky 118
#endif
1 jermar 119
 
1138 jermar 120
#define CONFIG_STACK_SIZE   ((1<<STACK_FRAMES)*STACK_SIZE)
121
 
1229 jermar 122
/** Main kernel routine for bootstrap CPU.
108 decky 123
 *
124
 * Initializes the kernel by bootstrap CPU.
675 jermar 125
 * This function passes control directly to
126
 * main_bsp_separated_stack().
108 decky 127
 *
413 jermar 128
 * Assuming interrupts_disable().
108 decky 129
 *
1 jermar 130
 */
131
void main_bsp(void)
132
{
814 palkovsky 133
    __address stackaddr;
134
 
1 jermar 135
    config.cpu_count = 1;
136
    config.cpu_active = 1;
651 decky 137
 
369 jermar 138
    config.base = hardcoded_load_address;
139
    config.memory_size = get_memory_size();
210 decky 140
 
814 palkovsky 141
    config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE);
142
    stackaddr = config.base + config.kernel_size;
1037 decky 143
 
814 palkovsky 144
    /* Avoid placing kernel on top of init */
1037 decky 145
    count_t i;
146
    bool overlap = false;
147
    for (i = 0; i < init.cnt; i++)
1063 palkovsky 148
        if (PA_overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) {
1037 decky 149
            stackaddr = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, CONFIG_STACK_SIZE);
150
            init.tasks[i].size = ALIGN_UP(init.tasks[i].size, CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE;
151
            overlap = true;
152
        }
153
 
154
    if (!overlap)
814 palkovsky 155
        config.kernel_size += CONFIG_STACK_SIZE;
210 decky 156
 
47 jermar 157
    context_save(&ctx);
1138 jermar 158
    context_set(&ctx, FADDR(main_bsp_separated_stack), stackaddr, THREAD_STACK_SIZE);
47 jermar 159
    context_restore(&ctx);
1 jermar 160
    /* not reached */
161
}
162
 
108 decky 163
 
1229 jermar 164
/** Main kernel routine for bootstrap CPU using new stack.
108 decky 165
 *
166
 * Second part of main_bsp().
167
 *
168
 */
174 jermar 169
void main_bsp_separated_stack(void)
170
{
1 jermar 171
    task_t *k;
172
    thread_t *t;
1109 jermar 173
    count_t i;
207 decky 174
 
184 jermar 175
    the_initialize(THE);
1109 jermar 176
 
517 jermar 177
    /*
178
     * kconsole data structures must be initialized very early
179
     * because other subsystems will register their respective
180
     * commands.
181
     */
182
    kconsole_init();
1037 decky 183
 
756 jermar 184
    /*
185
     * Exception handler initialization, before architecture
673 jermar 186
     * starts adding its own handlers
578 palkovsky 187
     */
188
    exc_init();
755 jermar 189
 
190
    /*
191
     * Memory management subsystems initialization.
192
     */
26 jermar 193
    arch_pre_mm_init();
1101 jermar 194
    frame_init();       /* Initialize at least 1 memory segment big enough for slab to work */
789 palkovsky 195
    slab_cache_init();
1164 jermar 196
    btree_init();
756 jermar 197
    as_init();
23 jermar 198
    page_init();
199
    tlb_init();
1315 jermar 200
    config.mm_initialized = true;
1434 palkovsky 201
    arch_post_mm_init();
1101 jermar 202
 
673 jermar 203
    version_print();
1389 decky 204
    printf("%.*p: hardcoded_ktext_size=%zdK, hardcoded_kdata_size=%zdK\n", sizeof(__address) * 2, config.base, hardcoded_ktext_size >> 10, hardcoded_kdata_size >> 10);
1 jermar 205
 
503 jermar 206
    arch_pre_smp_init();
34 jermar 207
    smp_init();
1101 jermar 208
 
209
    slab_enable_cpucache(); /* Slab must be initialized AFTER we know the number of processors */
773 palkovsky 210
 
1389 decky 211
    printf("config.memory_size=%zdM\n", config.memory_size >> 20);
1196 cejka 212
    printf("config.cpu_count=%zd\n", config.cpu_count);
1 jermar 213
    cpu_init();
860 decky 214
 
1 jermar 215
    calibrate_delay_loop();
1434 palkovsky 216
    clock_counter_init();
1 jermar 217
    timeout_init();
218
    scheduler_init();
219
    task_init();
220
    thread_init();
1109 jermar 221
    futex_init();
1595 palkovsky 222
    klog_init();
628 decky 223
 
1037 decky 224
    for (i = 0; i < init.cnt; i++)
1389 decky 225
        printf("init[%zd].addr=%.*p, init[%zd].size=%zd\n", i, sizeof(__address) * 2, init.tasks[i].addr, i, init.tasks[i].size);
955 palkovsky 226
 
227
    ipc_init();
1109 jermar 228
 
1 jermar 229
    /*
230
     * Create kernel task.
231
     */
1062 jermar 232
    k = task_create(AS_KERNEL, "KERNEL");
210 decky 233
    if (!k)
234
        panic("can't create kernel task\n");
860 decky 235
 
1 jermar 236
    /*
237
     * Create the first thread.
238
     */
1062 jermar 239
    t = thread_create(kinit, NULL, k, 0, "kinit");
210 decky 240
    if (!t)
241
        panic("can't create kinit thread\n");
1 jermar 242
    thread_ready(t);
860 decky 243
 
1 jermar 244
    /*
245
     * This call to scheduler() will return to kinit,
246
     * starting the thread of kernel threads.
247
     */
248
    scheduler();
249
    /* not reached */
250
}
251
 
108 decky 252
 
458 decky 253
#ifdef CONFIG_SMP
1229 jermar 254
/** Main kernel routine for application CPUs.
108 decky 255
 *
256
 * Executed by application processors, temporary stack
257
 * is at ctx.sp which was set during BP boot.
675 jermar 258
 * This function passes control directly to
259
 * main_ap_separated_stack().
108 decky 260
 *
413 jermar 261
 * Assuming interrupts_disable()'d.
108 decky 262
 *
1 jermar 263
 */
264
void main_ap(void)
265
{
266
    /*
267
     * Incrementing the active CPU counter will guarantee that the
268
     * pm_init() will not attempt to build GDT and IDT tables again.
269
     * Neither frame_init() will do the complete thing. Neither cpu_init()
270
     * will do.
271
     */
272
    config.cpu_active++;
273
 
192 jermar 274
    /*
275
     * The THE structure is well defined because ctx.sp is used as stack.
276
     */
277
    the_initialize(THE);
298 decky 278
 
26 jermar 279
    arch_pre_mm_init();
1 jermar 280
    frame_init();
281
    page_init();
389 jermar 282
    tlb_init();
26 jermar 283
    arch_post_mm_init();
298 decky 284
 
1 jermar 285
    cpu_init();
298 decky 286
 
1 jermar 287
    calibrate_delay_loop();
288
 
289
    l_apic_init();
290
    l_apic_debug();
291
 
192 jermar 292
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 293
 
294
    /*
295
     * If we woke kmp up before we left the kernel stack, we could
296
     * collide with another CPU coming up. To prevent this, we
297
     * switch to this cpu's private stack prior to waking kmp up.
298
     */
414 jermar 299
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
47 jermar 300
    context_restore(&CPU->saved_context);
1 jermar 301
    /* not reached */
302
}
303
 
108 decky 304
 
1229 jermar 305
/** Main kernel routine for application CPUs using new stack.
108 decky 306
 *
307
 * Second part of main_ap().
308
 *
309
 */
1 jermar 310
void main_ap_separated_stack(void)
311
{
312
    /*
313
     * Configure timeouts for this cpu.
314
     */
315
    timeout_init();
316
 
317
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
318
    scheduler();
319
    /* not reached */
320
}
458 decky 321
#endif /* CONFIG_SMP */