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1 jermar 1
/*
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 * 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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#include <arch/asm.h>
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#include <context.h>
1 jermar 31
#include <print.h>
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#include <panic.h>
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#include <debug.h>
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#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>
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#include <main/version.h>
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#include <console/kconsole.h>
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#include <cpu.h>
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#include <align.h>
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#include <interrupt.h>
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#include <arch/mm/memory_init.h>
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#include <mm/frame.h>
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#include <mm/page.h>
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#include <genarch/mm/page_pt.h>
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#include <mm/tlb.h>
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#include <mm/as.h>
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#include <mm/slab.h>
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#include <synch/waitq.h>
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#include <synch/futex.h>
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#include <arch/arch.h>
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#include <arch.h>
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#include <arch/faddr.h>
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#include <typedefs.h>
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#include <ipc/ipc.h>
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#include <macros.h>
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#include <adt/btree.h>
106 jermar 61
 
675 jermar 62
#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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config_t config;    /**< Global configuration structure. */
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init_t init = {0};      /**< Initial user-space tasks */
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1 jermar 71
context_t ctx;
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523 jermar 73
/**
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 * These 'hardcoded' variables will be intialized by
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 * the linker or the low level assembler code with
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 * appropriate sizes and addresses.
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 */
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__address hardcoded_load_address = 0;
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size_t hardcoded_ktext_size = 0;
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size_t hardcoded_kdata_size = 0;
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void main_bsp(void);
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void main_ap(void);
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/*
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 * 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);
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#ifdef CONFIG_SMP
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static void main_ap_separated_stack(void);
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#endif
1 jermar 95
 
1138 jermar 96
#define CONFIG_STACK_SIZE   ((1<<STACK_FRAMES)*STACK_SIZE)
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1229 jermar 98
/** Main kernel routine for bootstrap CPU.
108 decky 99
 *
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 * Initializes the kernel by bootstrap CPU.
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 * This function passes control directly to
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 * main_bsp_separated_stack().
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 *
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 * Assuming interrupts_disable().
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 *
1 jermar 106
 */
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void main_bsp(void)
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{
814 palkovsky 109
    __address stackaddr;
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1 jermar 111
    config.cpu_count = 1;
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    config.cpu_active = 1;
651 decky 113
 
369 jermar 114
    config.base = hardcoded_load_address;
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    config.memory_size = get_memory_size();
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814 palkovsky 117
    config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE);
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    stackaddr = config.base + config.kernel_size;
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814 palkovsky 120
    /* Avoid placing kernel on top of init */
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    count_t i;
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    bool overlap = false;
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    for (i = 0; i < init.cnt; i++)
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        if (PA_overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) {
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            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;
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        }
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130
    if (!overlap)
814 palkovsky 131
        config.kernel_size += CONFIG_STACK_SIZE;
210 decky 132
 
47 jermar 133
    context_save(&ctx);
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    context_set(&ctx, FADDR(main_bsp_separated_stack), stackaddr, THREAD_STACK_SIZE);
47 jermar 135
    context_restore(&ctx);
1 jermar 136
    /* not reached */
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}
138
 
108 decky 139
 
1229 jermar 140
/** Main kernel routine for bootstrap CPU using new stack.
108 decky 141
 *
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 * Second part of main_bsp().
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 *
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 */
174 jermar 145
void main_bsp_separated_stack(void)
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{
1 jermar 147
    task_t *k;
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    thread_t *t;
1109 jermar 149
    count_t i;
207 decky 150
 
184 jermar 151
    the_initialize(THE);
1109 jermar 152
 
517 jermar 153
    /*
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     * kconsole data structures must be initialized very early
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     * because other subsystems will register their respective
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     * commands.
157
     */
158
    kconsole_init();
1037 decky 159
 
756 jermar 160
    /*
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     * Exception handler initialization, before architecture
673 jermar 162
     * starts adding its own handlers
578 palkovsky 163
     */
164
    exc_init();
755 jermar 165
 
166
    /*
167
     * Memory management subsystems initialization.
168
     */
26 jermar 169
    arch_pre_mm_init();
1101 jermar 170
    frame_init();       /* Initialize at least 1 memory segment big enough for slab to work */
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    slab_cache_init();
1164 jermar 172
    btree_init();
756 jermar 173
    as_init();
23 jermar 174
    page_init();
175
    tlb_init();
814 palkovsky 176
    arch_post_mm_init();   
1101 jermar 177
 
673 jermar 178
    version_print();
1224 cejka 179
    printf("%.*p: hardcoded_ktext_size=%zdK, hardcoded_kdata_size=%zdK\n", sizeof(__address) * 2, config.base, hardcoded_ktext_size / 1024, hardcoded_kdata_size / 1024);
1 jermar 180
 
503 jermar 181
    arch_pre_smp_init();
34 jermar 182
    smp_init();
1101 jermar 183
 
184
    slab_enable_cpucache(); /* Slab must be initialized AFTER we know the number of processors */
773 palkovsky 185
 
1196 cejka 186
    printf("config.memory_size=%zdM\n", config.memory_size/(1024*1024));
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    printf("config.cpu_count=%zd\n", config.cpu_count);
1 jermar 188
    cpu_init();
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1 jermar 190
    calibrate_delay_loop();
191
    timeout_init();
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    scheduler_init();
193
    task_init();
194
    thread_init();
1109 jermar 195
    futex_init();
628 decky 196
 
1037 decky 197
    for (i = 0; i < init.cnt; i++)
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        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 199
 
200
    ipc_init();
1109 jermar 201
 
1 jermar 202
    /*
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     * Create kernel task.
204
     */
1062 jermar 205
    k = task_create(AS_KERNEL, "KERNEL");
210 decky 206
    if (!k)
207
        panic("can't create kernel task\n");
860 decky 208
 
1 jermar 209
    /*
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     * Create the first thread.
211
     */
1062 jermar 212
    t = thread_create(kinit, NULL, k, 0, "kinit");
210 decky 213
    if (!t)
214
        panic("can't create kinit thread\n");
1 jermar 215
    thread_ready(t);
860 decky 216
 
1 jermar 217
    /*
218
     * This call to scheduler() will return to kinit,
219
     * starting the thread of kernel threads.
220
     */
221
    scheduler();
222
    /* not reached */
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}
224
 
108 decky 225
 
458 decky 226
#ifdef CONFIG_SMP
1229 jermar 227
/** Main kernel routine for application CPUs.
108 decky 228
 *
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 * Executed by application processors, temporary stack
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 * is at ctx.sp which was set during BP boot.
675 jermar 231
 * This function passes control directly to
232
 * main_ap_separated_stack().
108 decky 233
 *
413 jermar 234
 * Assuming interrupts_disable()'d.
108 decky 235
 *
1 jermar 236
 */
237
void main_ap(void)
238
{
239
    /*
240
     * Incrementing the active CPU counter will guarantee that the
241
     * pm_init() will not attempt to build GDT and IDT tables again.
242
     * Neither frame_init() will do the complete thing. Neither cpu_init()
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     * will do.
244
     */
245
    config.cpu_active++;
246
 
192 jermar 247
    /*
248
     * The THE structure is well defined because ctx.sp is used as stack.
249
     */
250
    the_initialize(THE);
298 decky 251
 
26 jermar 252
    arch_pre_mm_init();
1 jermar 253
    frame_init();
254
    page_init();
389 jermar 255
    tlb_init();
26 jermar 256
    arch_post_mm_init();
298 decky 257
 
1 jermar 258
    cpu_init();
298 decky 259
 
1 jermar 260
    calibrate_delay_loop();
261
 
262
    l_apic_init();
263
    l_apic_debug();
264
 
192 jermar 265
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 266
 
267
    /*
268
     * If we woke kmp up before we left the kernel stack, we could
269
     * collide with another CPU coming up. To prevent this, we
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     * switch to this cpu's private stack prior to waking kmp up.
271
     */
414 jermar 272
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
47 jermar 273
    context_restore(&CPU->saved_context);
1 jermar 274
    /* not reached */
275
}
276
 
108 decky 277
 
1229 jermar 278
/** Main kernel routine for application CPUs using new stack.
108 decky 279
 *
280
 * Second part of main_ap().
281
 *
282
 */
1 jermar 283
void main_ap_separated_stack(void)
284
{
285
    /*
286
     * Configure timeouts for this cpu.
287
     */
288
    timeout_init();
289
 
290
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
291
    scheduler();
292
    /* not reached */
293
}
458 decky 294
#endif /* CONFIG_SMP */