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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
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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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1729 decky 29
/** @addtogroup main
1702 cejka 30
 * @{
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 */
32
 
1248 jermar 33
/**
1702 cejka 34
 * @file
1248 jermar 35
 * @brief   Main initialization kernel function for all processors.
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 *
37
 * During kernel boot, all processors, after architecture dependent
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 * initialization, start executing code found in this file. After
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 * bringing up all subsystems, control is passed to scheduler().
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 *
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 * The bootstrap processor starts executing main_bsp() while
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 * the application processors start executing main_ap().
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 *
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 * @see scheduler()
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 * @see main_bsp()
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 * @see main_ap()
47
 */
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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>
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#include <time/clock.h>
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#include <proc/scheduler.h>
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#include <proc/thread.h>
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#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>
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#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>
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1315 jermar 89
/** Global configuration structure. */
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config_t config = {
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    .mm_initialized = false
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};
675 jermar 93
 
1315 jermar 94
/** Initial user-space tasks */
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init_t init = {
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97
};
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1 jermar 99
context_t ctx;
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523 jermar 101
/**
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 * These 'hardcoded' variables will be intialized by
105 jermar 103
 * the linker or the low level assembler code with
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 * appropriate sizes and addresses.
1 jermar 105
 */
37 jermar 106
__address hardcoded_load_address = 0;
106 jermar 107
size_t hardcoded_ktext_size = 0;
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size_t hardcoded_kdata_size = 0;
1 jermar 109
 
110
void main_bsp(void);
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void main_ap(void);
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113
/*
114
 * 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
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 * space. The stack could get corrupted by a fooled compiler-generated
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 * pop sequence otherwise.
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 */
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static void main_bsp_separated_stack(void);
625 palkovsky 120
#ifdef CONFIG_SMP
1 jermar 121
static void main_ap_separated_stack(void);
625 palkovsky 122
#endif
1 jermar 123
 
1138 jermar 124
#define CONFIG_STACK_SIZE   ((1<<STACK_FRAMES)*STACK_SIZE)
125
 
1229 jermar 126
/** Main kernel routine for bootstrap CPU.
108 decky 127
 *
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 * Initializes the kernel by bootstrap CPU.
675 jermar 129
 * This function passes control directly to
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 * main_bsp_separated_stack().
108 decky 131
 *
413 jermar 132
 * Assuming interrupts_disable().
108 decky 133
 *
1 jermar 134
 */
135
void main_bsp(void)
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{
814 palkovsky 137
    __address stackaddr;
138
 
1 jermar 139
    config.cpu_count = 1;
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    config.cpu_active = 1;
651 decky 141
 
369 jermar 142
    config.base = hardcoded_load_address;
143
    config.memory_size = get_memory_size();
210 decky 144
 
814 palkovsky 145
    config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE);
146
    stackaddr = config.base + config.kernel_size;
1037 decky 147
 
814 palkovsky 148
    /* Avoid placing kernel on top of init */
1037 decky 149
    count_t i;
150
    bool overlap = false;
151
    for (i = 0; i < init.cnt; i++)
1063 palkovsky 152
        if (PA_overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) {
1037 decky 153
            stackaddr = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, CONFIG_STACK_SIZE);
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            init.tasks[i].size = ALIGN_UP(init.tasks[i].size, CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE;
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            overlap = true;
156
        }
157
 
158
    if (!overlap)
814 palkovsky 159
        config.kernel_size += CONFIG_STACK_SIZE;
210 decky 160
 
47 jermar 161
    context_save(&ctx);
1138 jermar 162
    context_set(&ctx, FADDR(main_bsp_separated_stack), stackaddr, THREAD_STACK_SIZE);
47 jermar 163
    context_restore(&ctx);
1 jermar 164
    /* not reached */
165
}
166
 
108 decky 167
 
1229 jermar 168
/** Main kernel routine for bootstrap CPU using new stack.
108 decky 169
 *
170
 * Second part of main_bsp().
171
 *
172
 */
174 jermar 173
void main_bsp_separated_stack(void)
174
{
1 jermar 175
    task_t *k;
176
    thread_t *t;
1109 jermar 177
    count_t i;
207 decky 178
 
184 jermar 179
    the_initialize(THE);
1109 jermar 180
 
517 jermar 181
    /*
182
     * kconsole data structures must be initialized very early
183
     * because other subsystems will register their respective
184
     * commands.
185
     */
186
    kconsole_init();
1037 decky 187
 
756 jermar 188
    /*
189
     * Exception handler initialization, before architecture
673 jermar 190
     * starts adding its own handlers
578 palkovsky 191
     */
192
    exc_init();
755 jermar 193
 
194
    /*
195
     * Memory management subsystems initialization.
196
     */
26 jermar 197
    arch_pre_mm_init();
1101 jermar 198
    frame_init();       /* Initialize at least 1 memory segment big enough for slab to work */
789 palkovsky 199
    slab_cache_init();
1164 jermar 200
    btree_init();
756 jermar 201
    as_init();
23 jermar 202
    page_init();
203
    tlb_init();
1315 jermar 204
    config.mm_initialized = true;
1434 palkovsky 205
    arch_post_mm_init();
1101 jermar 206
 
673 jermar 207
    version_print();
1389 decky 208
    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 209
 
503 jermar 210
    arch_pre_smp_init();
34 jermar 211
    smp_init();
1101 jermar 212
 
213
    slab_enable_cpucache(); /* Slab must be initialized AFTER we know the number of processors */
773 palkovsky 214
 
1389 decky 215
    printf("config.memory_size=%zdM\n", config.memory_size >> 20);
1196 cejka 216
    printf("config.cpu_count=%zd\n", config.cpu_count);
1 jermar 217
    cpu_init();
860 decky 218
 
1 jermar 219
    calibrate_delay_loop();
1434 palkovsky 220
    clock_counter_init();
1 jermar 221
    timeout_init();
222
    scheduler_init();
223
    task_init();
224
    thread_init();
1109 jermar 225
    futex_init();
1595 palkovsky 226
    klog_init();
628 decky 227
 
1037 decky 228
    for (i = 0; i < init.cnt; i++)
1389 decky 229
        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 230
 
231
    ipc_init();
1109 jermar 232
 
1 jermar 233
    /*
234
     * Create kernel task.
235
     */
1062 jermar 236
    k = task_create(AS_KERNEL, "KERNEL");
210 decky 237
    if (!k)
238
        panic("can't create kernel task\n");
860 decky 239
 
1 jermar 240
    /*
241
     * Create the first thread.
242
     */
1062 jermar 243
    t = thread_create(kinit, NULL, k, 0, "kinit");
210 decky 244
    if (!t)
245
        panic("can't create kinit thread\n");
1 jermar 246
    thread_ready(t);
860 decky 247
 
1 jermar 248
    /*
249
     * This call to scheduler() will return to kinit,
250
     * starting the thread of kernel threads.
251
     */
252
    scheduler();
253
    /* not reached */
254
}
255
 
108 decky 256
 
458 decky 257
#ifdef CONFIG_SMP
1229 jermar 258
/** Main kernel routine for application CPUs.
108 decky 259
 *
260
 * Executed by application processors, temporary stack
261
 * is at ctx.sp which was set during BP boot.
675 jermar 262
 * This function passes control directly to
263
 * main_ap_separated_stack().
108 decky 264
 *
413 jermar 265
 * Assuming interrupts_disable()'d.
108 decky 266
 *
1 jermar 267
 */
268
void main_ap(void)
269
{
270
    /*
271
     * Incrementing the active CPU counter will guarantee that the
272
     * pm_init() will not attempt to build GDT and IDT tables again.
273
     * Neither frame_init() will do the complete thing. Neither cpu_init()
274
     * will do.
275
     */
276
    config.cpu_active++;
277
 
192 jermar 278
    /*
279
     * The THE structure is well defined because ctx.sp is used as stack.
280
     */
281
    the_initialize(THE);
298 decky 282
 
26 jermar 283
    arch_pre_mm_init();
1 jermar 284
    frame_init();
285
    page_init();
389 jermar 286
    tlb_init();
26 jermar 287
    arch_post_mm_init();
298 decky 288
 
1 jermar 289
    cpu_init();
298 decky 290
 
1 jermar 291
    calibrate_delay_loop();
292
 
293
    l_apic_init();
294
    l_apic_debug();
295
 
192 jermar 296
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 297
 
298
    /*
299
     * If we woke kmp up before we left the kernel stack, we could
300
     * collide with another CPU coming up. To prevent this, we
301
     * switch to this cpu's private stack prior to waking kmp up.
302
     */
414 jermar 303
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
47 jermar 304
    context_restore(&CPU->saved_context);
1 jermar 305
    /* not reached */
306
}
307
 
108 decky 308
 
1229 jermar 309
/** Main kernel routine for application CPUs using new stack.
108 decky 310
 *
311
 * Second part of main_ap().
312
 *
313
 */
1 jermar 314
void main_ap_separated_stack(void)
315
{
316
    /*
317
     * Configure timeouts for this cpu.
318
     */
319
    timeout_init();
320
 
321
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
322
    scheduler();
323
    /* not reached */
324
}
458 decky 325
#endif /* CONFIG_SMP */
1702 cejka 326
 
1729 decky 327
/** @}
1702 cejka 328
 */