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1 jermar 1
/*
2
 * Copyright (C) 2001-2004 Jakub Jermar
3
 * All rights reserved.
4
 *
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 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
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 * are met:
8
 *
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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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 *
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
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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.
27
 */
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1729 decky 29
/** @addtogroup main
1702 cejka 30
 * @{
31
 */
32
 
1248 jermar 33
/**
1702 cejka 34
 * @file
1248 jermar 35
 * @brief   Main initialization kernel function for all processors.
36
 *
37
 * During kernel boot, all processors, after architecture dependent
38
 * initialization, start executing code found in this file. After
39
 * bringing up all subsystems, control is passed to scheduler().
40
 *
41
 * The bootstrap processor starts executing main_bsp() while
42
 * the application processors start executing main_ap().
43
 *
44
 * @see scheduler()
45
 * @see main_bsp()
46
 * @see main_ap()
47
 */
48
 
1 jermar 49
#include <arch/asm.h>
97 jermar 50
#include <context.h>
1 jermar 51
#include <print.h>
68 decky 52
#include <panic.h>
561 decky 53
#include <debug.h>
1 jermar 54
#include <config.h>
55
#include <time/clock.h>
56
#include <proc/scheduler.h>
57
#include <proc/thread.h>
58
#include <proc/task.h>
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#include <main/kinit.h>
675 jermar 60
#include <main/version.h>
518 jermar 61
#include <console/kconsole.h>
1 jermar 62
#include <cpu.h>
402 jermar 63
#include <align.h>
578 palkovsky 64
#include <interrupt.h>
146 cejka 65
#include <arch/mm/memory_init.h>
1 jermar 66
#include <mm/frame.h>
67
#include <mm/page.h>
684 jermar 68
#include <genarch/mm/page_pt.h>
5 jermar 69
#include <mm/tlb.h>
703 jermar 70
#include <mm/as.h>
759 palkovsky 71
#include <mm/slab.h>
1 jermar 72
#include <synch/waitq.h>
1109 jermar 73
#include <synch/futex.h>
210 decky 74
#include <arch/arch.h>
1 jermar 75
#include <arch.h>
76 jermar 76
#include <arch/faddr.h>
106 jermar 77
#include <typedefs.h>
955 palkovsky 78
#include <ipc/ipc.h>
1063 palkovsky 79
#include <macros.h>
1164 jermar 80
#include <adt/btree.h>
1595 palkovsky 81
#include <console/klog.h>
106 jermar 82
 
675 jermar 83
#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>
88
 
1315 jermar 89
/** Global configuration structure. */
1757 jermar 90
config_t config;
675 jermar 91
 
1315 jermar 92
/** Initial user-space tasks */
93
init_t init = {
94
 
95
};
96
 
1894 jermar 97
/** Boot allocations. */
98
ballocs_t ballocs = {
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    .base = NULL,
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    .size = 0
101
};
102
 
1 jermar 103
context_t ctx;
104
 
1757 jermar 105
/*
523 jermar 106
 * These 'hardcoded' variables will be intialized by
105 jermar 107
 * the linker or the low level assembler code with
108
 * appropriate sizes and addresses.
1 jermar 109
 */
1780 jermar 110
uintptr_t hardcoded_load_address = 0;   /**< Virtual address of where the kernel is loaded. */
1757 jermar 111
size_t hardcoded_ktext_size = 0;    /**< Size of the kernel code in bytes. */
112
size_t hardcoded_kdata_size = 0;    /**< Size of the kernel data in bytes. */
1 jermar 113
 
1894 jermar 114
uintptr_t stack_safe = 0;       /**< Lowest safe stack virtual address */
1833 decky 115
 
1 jermar 116
void main_bsp(void);
117
void main_ap(void);
118
 
119
/*
120
 * These two functions prevent stack from underflowing during the
121
 * kernel boot phase when SP is set to the very top of the reserved
122
 * space. The stack could get corrupted by a fooled compiler-generated
123
 * pop sequence otherwise.
124
 */
125
static void main_bsp_separated_stack(void);
625 palkovsky 126
#ifdef CONFIG_SMP
1 jermar 127
static void main_ap_separated_stack(void);
625 palkovsky 128
#endif
1 jermar 129
 
1138 jermar 130
#define CONFIG_STACK_SIZE   ((1<<STACK_FRAMES)*STACK_SIZE)
131
 
1229 jermar 132
/** Main kernel routine for bootstrap CPU.
108 decky 133
 *
134
 * Initializes the kernel by bootstrap CPU.
675 jermar 135
 * This function passes control directly to
136
 * main_bsp_separated_stack().
108 decky 137
 *
413 jermar 138
 * Assuming interrupts_disable().
108 decky 139
 *
1 jermar 140
 */
141
void main_bsp(void)
142
{
143
    config.cpu_count = 1;
144
    config.cpu_active = 1;
651 decky 145
 
369 jermar 146
    config.base = hardcoded_load_address;
147
    config.memory_size = get_memory_size();
210 decky 148
 
814 palkovsky 149
    config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE);
1833 decky 150
    config.stack_size = CONFIG_STACK_SIZE;
1037 decky 151
 
1833 decky 152
    /* Initialy the stack is placed just after the kernel */
153
    config.stack_base = config.base + config.kernel_size;
154
 
155
    /* Avoid placing stack on top of init */
1037 decky 156
    count_t i;
1833 decky 157
    for (i = 0; i < init.cnt; i++) {
158
        if (PA_overlaps(config.stack_base, config.stack_size, init.tasks[i].addr, init.tasks[i].size))
159
            config.stack_base = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, config.stack_size);
160
    }
1894 jermar 161
 
162
    /* Avoid placing stack on top of boot allocations. */
163
    if (ballocs.size) {
164
        if (PA_overlaps(config.stack_base, config.stack_size, ballocs.base, ballocs.size))
165
            config.stack_base = ALIGN_UP(ballocs.base + ballocs.size, PAGE_SIZE);
166
    }
1037 decky 167
 
1833 decky 168
    if (config.stack_base < stack_safe)
169
        config.stack_base = ALIGN_UP(stack_safe, PAGE_SIZE);
210 decky 170
 
47 jermar 171
    context_save(&ctx);
1833 decky 172
    context_set(&ctx, FADDR(main_bsp_separated_stack), config.stack_base, THREAD_STACK_SIZE);
47 jermar 173
    context_restore(&ctx);
1 jermar 174
    /* not reached */
175
}
176
 
108 decky 177
 
1229 jermar 178
/** Main kernel routine for bootstrap CPU using new stack.
108 decky 179
 *
180
 * Second part of main_bsp().
181
 *
182
 */
174 jermar 183
void main_bsp_separated_stack(void)
184
{
1 jermar 185
    task_t *k;
186
    thread_t *t;
1109 jermar 187
    count_t i;
207 decky 188
 
184 jermar 189
    the_initialize(THE);
1109 jermar 190
 
517 jermar 191
    /*
192
     * kconsole data structures must be initialized very early
193
     * because other subsystems will register their respective
194
     * commands.
195
     */
196
    kconsole_init();
1037 decky 197
 
756 jermar 198
    /*
199
     * Exception handler initialization, before architecture
673 jermar 200
     * starts adding its own handlers
578 palkovsky 201
     */
202
    exc_init();
755 jermar 203
 
204
    /*
205
     * Memory management subsystems initialization.
206
     */
26 jermar 207
    arch_pre_mm_init();
1101 jermar 208
    frame_init();       /* Initialize at least 1 memory segment big enough for slab to work */
789 palkovsky 209
    slab_cache_init();
1164 jermar 210
    btree_init();
756 jermar 211
    as_init();
23 jermar 212
    page_init();
213
    tlb_init();
1434 palkovsky 214
    arch_post_mm_init();
1101 jermar 215
 
673 jermar 216
    version_print();
1833 decky 217
    printf("kernel: %.*p hardcoded_ktext_size=%zdK, hardcoded_kdata_size=%zdK\n", sizeof(uintptr_t) * 2, config.base, hardcoded_ktext_size >> 10, hardcoded_kdata_size >> 10);
218
    printf("stack:  %.*p size=%zdK\n", sizeof(uintptr_t) * 2, config.stack_base, config.stack_size >> 10);
1 jermar 219
 
503 jermar 220
    arch_pre_smp_init();
34 jermar 221
    smp_init();
1101 jermar 222
 
223
    slab_enable_cpucache(); /* Slab must be initialized AFTER we know the number of processors */
773 palkovsky 224
 
1389 decky 225
    printf("config.memory_size=%zdM\n", config.memory_size >> 20);
1196 cejka 226
    printf("config.cpu_count=%zd\n", config.cpu_count);
1 jermar 227
    cpu_init();
860 decky 228
 
1 jermar 229
    calibrate_delay_loop();
1434 palkovsky 230
    clock_counter_init();
1 jermar 231
    timeout_init();
232
    scheduler_init();
233
    task_init();
234
    thread_init();
1109 jermar 235
    futex_init();
1595 palkovsky 236
    klog_init();
628 decky 237
 
1826 decky 238
    if (init.cnt > 0) {
239
        for (i = 0; i < init.cnt; i++)
240
            printf("init[%zd].addr=%.*p, init[%zd].size=%zd\n", i, sizeof(uintptr_t) * 2, init.tasks[i].addr, i, init.tasks[i].size);
241
    } else
242
        printf("No init tasks found\n");
955 palkovsky 243
 
244
    ipc_init();
1109 jermar 245
 
1 jermar 246
    /*
247
     * Create kernel task.
248
     */
1062 jermar 249
    k = task_create(AS_KERNEL, "KERNEL");
210 decky 250
    if (!k)
251
        panic("can't create kernel task\n");
860 decky 252
 
1 jermar 253
    /*
254
     * Create the first thread.
255
     */
1062 jermar 256
    t = thread_create(kinit, NULL, k, 0, "kinit");
210 decky 257
    if (!t)
258
        panic("can't create kinit thread\n");
1 jermar 259
    thread_ready(t);
860 decky 260
 
1 jermar 261
    /*
262
     * This call to scheduler() will return to kinit,
263
     * starting the thread of kernel threads.
264
     */
265
    scheduler();
266
    /* not reached */
267
}
268
 
108 decky 269
 
458 decky 270
#ifdef CONFIG_SMP
1229 jermar 271
/** Main kernel routine for application CPUs.
108 decky 272
 *
273
 * Executed by application processors, temporary stack
274
 * is at ctx.sp which was set during BP boot.
675 jermar 275
 * This function passes control directly to
276
 * main_ap_separated_stack().
108 decky 277
 *
413 jermar 278
 * Assuming interrupts_disable()'d.
108 decky 279
 *
1 jermar 280
 */
281
void main_ap(void)
282
{
283
    /*
284
     * Incrementing the active CPU counter will guarantee that the
285
     * pm_init() will not attempt to build GDT and IDT tables again.
286
     * Neither frame_init() will do the complete thing. Neither cpu_init()
287
     * will do.
288
     */
289
    config.cpu_active++;
290
 
192 jermar 291
    /*
292
     * The THE structure is well defined because ctx.sp is used as stack.
293
     */
294
    the_initialize(THE);
298 decky 295
 
26 jermar 296
    arch_pre_mm_init();
1 jermar 297
    frame_init();
298
    page_init();
389 jermar 299
    tlb_init();
26 jermar 300
    arch_post_mm_init();
298 decky 301
 
1 jermar 302
    cpu_init();
298 decky 303
 
1 jermar 304
    calibrate_delay_loop();
305
 
306
    l_apic_init();
307
    l_apic_debug();
308
 
192 jermar 309
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 310
 
311
    /*
312
     * If we woke kmp up before we left the kernel stack, we could
313
     * collide with another CPU coming up. To prevent this, we
314
     * switch to this cpu's private stack prior to waking kmp up.
315
     */
1780 jermar 316
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (uintptr_t) CPU->stack, CPU_STACK_SIZE);
47 jermar 317
    context_restore(&CPU->saved_context);
1 jermar 318
    /* not reached */
319
}
320
 
108 decky 321
 
1229 jermar 322
/** Main kernel routine for application CPUs using new stack.
108 decky 323
 *
324
 * Second part of main_ap().
325
 *
326
 */
1 jermar 327
void main_ap_separated_stack(void)
328
{
329
    /*
330
     * Configure timeouts for this cpu.
331
     */
332
    timeout_init();
333
 
334
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
335
    scheduler();
336
    /* not reached */
337
}
458 decky 338
#endif /* CONFIG_SMP */
1702 cejka 339
 
1729 decky 340
/** @}
1702 cejka 341
 */