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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
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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
 * @{
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
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 * the application processors start executing main_ap().
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 *
44
 * @see scheduler()
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 * @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>
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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>
88
 
1315 jermar 89
/** Global configuration structure. */
1757 jermar 90
config_t config;
675 jermar 91
 
1315 jermar 92
/** Initial user-space tasks */
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init_t init = {
94
 
95
};
96
 
1 jermar 97
context_t ctx;
98
 
1757 jermar 99
/*
523 jermar 100
 * These 'hardcoded' variables will be intialized by
105 jermar 101
 * the linker or the low level assembler code with
102
 * appropriate sizes and addresses.
1 jermar 103
 */
1780 jermar 104
uintptr_t hardcoded_load_address = 0;   /**< Virtual address of where the kernel is loaded. */
1757 jermar 105
size_t hardcoded_ktext_size = 0;    /**< Size of the kernel code in bytes. */
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size_t hardcoded_kdata_size = 0;    /**< Size of the kernel data in bytes. */
1 jermar 107
 
108
void main_bsp(void);
109
void main_ap(void);
110
 
111
/*
112
 * 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.
116
 */
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static void main_bsp_separated_stack(void);
625 palkovsky 118
#ifdef CONFIG_SMP
1 jermar 119
static void main_ap_separated_stack(void);
625 palkovsky 120
#endif
1 jermar 121
 
1138 jermar 122
#define CONFIG_STACK_SIZE   ((1<<STACK_FRAMES)*STACK_SIZE)
123
 
1229 jermar 124
/** Main kernel routine for bootstrap CPU.
108 decky 125
 *
126
 * Initializes the kernel by bootstrap CPU.
675 jermar 127
 * This function passes control directly to
128
 * main_bsp_separated_stack().
108 decky 129
 *
413 jermar 130
 * Assuming interrupts_disable().
108 decky 131
 *
1 jermar 132
 */
133
void main_bsp(void)
134
{
1780 jermar 135
    uintptr_t stackaddr;
814 palkovsky 136
 
1 jermar 137
    config.cpu_count = 1;
138
    config.cpu_active = 1;
651 decky 139
 
369 jermar 140
    config.base = hardcoded_load_address;
141
    config.memory_size = get_memory_size();
210 decky 142
 
814 palkovsky 143
    config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE);
144
    stackaddr = config.base + config.kernel_size;
1037 decky 145
 
814 palkovsky 146
    /* Avoid placing kernel on top of init */
1037 decky 147
    count_t i;
148
    bool overlap = false;
149
    for (i = 0; i < init.cnt; i++)
1063 palkovsky 150
        if (PA_overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) {
1037 decky 151
            stackaddr = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, CONFIG_STACK_SIZE);
152
            init.tasks[i].size = ALIGN_UP(init.tasks[i].size, CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE;
153
            overlap = true;
154
        }
155
 
156
    if (!overlap)
814 palkovsky 157
        config.kernel_size += CONFIG_STACK_SIZE;
210 decky 158
 
47 jermar 159
    context_save(&ctx);
1138 jermar 160
    context_set(&ctx, FADDR(main_bsp_separated_stack), stackaddr, THREAD_STACK_SIZE);
47 jermar 161
    context_restore(&ctx);
1 jermar 162
    /* not reached */
163
}
164
 
108 decky 165
 
1229 jermar 166
/** Main kernel routine for bootstrap CPU using new stack.
108 decky 167
 *
168
 * Second part of main_bsp().
169
 *
170
 */
174 jermar 171
void main_bsp_separated_stack(void)
172
{
1 jermar 173
    task_t *k;
174
    thread_t *t;
1109 jermar 175
    count_t i;
207 decky 176
 
184 jermar 177
    the_initialize(THE);
1109 jermar 178
 
517 jermar 179
    /*
180
     * kconsole data structures must be initialized very early
181
     * because other subsystems will register their respective
182
     * commands.
183
     */
184
    kconsole_init();
1037 decky 185
 
756 jermar 186
    /*
187
     * Exception handler initialization, before architecture
673 jermar 188
     * starts adding its own handlers
578 palkovsky 189
     */
190
    exc_init();
755 jermar 191
 
192
    /*
193
     * Memory management subsystems initialization.
194
     */
26 jermar 195
    arch_pre_mm_init();
1101 jermar 196
    frame_init();       /* Initialize at least 1 memory segment big enough for slab to work */
789 palkovsky 197
    slab_cache_init();
1164 jermar 198
    btree_init();
756 jermar 199
    as_init();
23 jermar 200
    page_init();
201
    tlb_init();
1434 palkovsky 202
    arch_post_mm_init();
1101 jermar 203
 
673 jermar 204
    version_print();
1780 jermar 205
    printf("%.*p: hardcoded_ktext_size=%zdK, hardcoded_kdata_size=%zdK\n", sizeof(uintptr_t) * 2, config.base, hardcoded_ktext_size >> 10, hardcoded_kdata_size >> 10);
1 jermar 206
 
503 jermar 207
    arch_pre_smp_init();
34 jermar 208
    smp_init();
1101 jermar 209
 
210
    slab_enable_cpucache(); /* Slab must be initialized AFTER we know the number of processors */
773 palkovsky 211
 
1389 decky 212
    printf("config.memory_size=%zdM\n", config.memory_size >> 20);
1196 cejka 213
    printf("config.cpu_count=%zd\n", config.cpu_count);
1 jermar 214
    cpu_init();
860 decky 215
 
1 jermar 216
    calibrate_delay_loop();
1434 palkovsky 217
    clock_counter_init();
1 jermar 218
    timeout_init();
219
    scheduler_init();
220
    task_init();
221
    thread_init();
1109 jermar 222
    futex_init();
1595 palkovsky 223
    klog_init();
628 decky 224
 
1037 decky 225
    for (i = 0; i < init.cnt; i++)
1780 jermar 226
        printf("init[%zd].addr=%.*p, init[%zd].size=%zd\n", i, sizeof(uintptr_t) * 2, init.tasks[i].addr, i, init.tasks[i].size);
955 palkovsky 227
 
228
    ipc_init();
1109 jermar 229
 
1 jermar 230
    /*
231
     * Create kernel task.
232
     */
1062 jermar 233
    k = task_create(AS_KERNEL, "KERNEL");
210 decky 234
    if (!k)
235
        panic("can't create kernel task\n");
860 decky 236
 
1 jermar 237
    /*
238
     * Create the first thread.
239
     */
1062 jermar 240
    t = thread_create(kinit, NULL, k, 0, "kinit");
210 decky 241
    if (!t)
242
        panic("can't create kinit thread\n");
1 jermar 243
    thread_ready(t);
860 decky 244
 
1 jermar 245
    /*
246
     * This call to scheduler() will return to kinit,
247
     * starting the thread of kernel threads.
248
     */
249
    scheduler();
250
    /* not reached */
251
}
252
 
108 decky 253
 
458 decky 254
#ifdef CONFIG_SMP
1229 jermar 255
/** Main kernel routine for application CPUs.
108 decky 256
 *
257
 * Executed by application processors, temporary stack
258
 * is at ctx.sp which was set during BP boot.
675 jermar 259
 * This function passes control directly to
260
 * main_ap_separated_stack().
108 decky 261
 *
413 jermar 262
 * Assuming interrupts_disable()'d.
108 decky 263
 *
1 jermar 264
 */
265
void main_ap(void)
266
{
267
    /*
268
     * Incrementing the active CPU counter will guarantee that the
269
     * pm_init() will not attempt to build GDT and IDT tables again.
270
     * Neither frame_init() will do the complete thing. Neither cpu_init()
271
     * will do.
272
     */
273
    config.cpu_active++;
274
 
192 jermar 275
    /*
276
     * The THE structure is well defined because ctx.sp is used as stack.
277
     */
278
    the_initialize(THE);
298 decky 279
 
26 jermar 280
    arch_pre_mm_init();
1 jermar 281
    frame_init();
282
    page_init();
389 jermar 283
    tlb_init();
26 jermar 284
    arch_post_mm_init();
298 decky 285
 
1 jermar 286
    cpu_init();
298 decky 287
 
1 jermar 288
    calibrate_delay_loop();
289
 
290
    l_apic_init();
291
    l_apic_debug();
292
 
192 jermar 293
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 294
 
295
    /*
296
     * If we woke kmp up before we left the kernel stack, we could
297
     * collide with another CPU coming up. To prevent this, we
298
     * switch to this cpu's private stack prior to waking kmp up.
299
     */
1780 jermar 300
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (uintptr_t) CPU->stack, CPU_STACK_SIZE);
47 jermar 301
    context_restore(&CPU->saved_context);
1 jermar 302
    /* not reached */
303
}
304
 
108 decky 305
 
1229 jermar 306
/** Main kernel routine for application CPUs using new stack.
108 decky 307
 *
308
 * Second part of main_ap().
309
 *
310
 */
1 jermar 311
void main_ap_separated_stack(void)
312
{
313
    /*
314
     * Configure timeouts for this cpu.
315
     */
316
    timeout_init();
317
 
318
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
319
    scheduler();
320
    /* not reached */
321
}
458 decky 322
#endif /* CONFIG_SMP */
1702 cejka 323
 
1729 decky 324
/** @}
1702 cejka 325
 */