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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>
97 jermar 30
#include <context.h>
1 jermar 31
#include <print.h>
68 decky 32
#include <panic.h>
561 decky 33
#include <debug.h>
1 jermar 34
#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>
1 jermar 42
#include <cpu.h>
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#include <align.h>
578 palkovsky 44
#include <interrupt.h>
146 cejka 45
#include <arch/mm/memory_init.h>
1 jermar 46
#include <mm/frame.h>
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#include <mm/page.h>
684 jermar 48
#include <genarch/mm/page_pt.h>
5 jermar 49
#include <mm/tlb.h>
703 jermar 50
#include <mm/as.h>
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#include <mm/slab.h>
1 jermar 52
#include <synch/waitq.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>
1063 palkovsky 58
#include <macros.h>
106 jermar 59
 
675 jermar 60
#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. */
1037 decky 67
init_t init = {0};  /**< Initial user-space tasks */
675 jermar 68
 
1 jermar 69
context_t ctx;
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523 jermar 71
/**
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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.
1 jermar 75
 */
37 jermar 76
__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;
1 jermar 79
 
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void main_bsp(void);
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void main_ap(void);
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83
/*
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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);
625 palkovsky 90
#ifdef CONFIG_SMP
1 jermar 91
static void main_ap_separated_stack(void);
625 palkovsky 92
#endif
1 jermar 93
 
108 decky 94
/** Bootstrap CPU main kernel routine
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 *
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 * Initializes the kernel by bootstrap CPU.
675 jermar 97
 * This function passes control directly to
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 * main_bsp_separated_stack().
108 decky 99
 *
413 jermar 100
 * Assuming interrupts_disable().
108 decky 101
 *
1 jermar 102
 */
103
void main_bsp(void)
104
{
814 palkovsky 105
    __address stackaddr;
106
 
1 jermar 107
    config.cpu_count = 1;
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    config.cpu_active = 1;
651 decky 109
 
369 jermar 110
    config.base = hardcoded_load_address;
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    config.memory_size = get_memory_size();
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814 palkovsky 113
    config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE);
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    stackaddr = config.base + config.kernel_size;
1037 decky 115
 
814 palkovsky 116
    /* Avoid placing kernel on top of init */
1037 decky 117
    count_t i;
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    bool overlap = false;
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    for (i = 0; i < init.cnt; i++)
1063 palkovsky 120
        if (PA_overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) {
1037 decky 121
            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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126
    if (!overlap)
814 palkovsky 127
        config.kernel_size += CONFIG_STACK_SIZE;
210 decky 128
 
47 jermar 129
    context_save(&ctx);
814 palkovsky 130
    context_set(&ctx, FADDR(main_bsp_separated_stack),
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            stackaddr, CONFIG_STACK_SIZE);
47 jermar 132
    context_restore(&ctx);
1 jermar 133
    /* not reached */
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}
135
 
108 decky 136
 
137
/** Bootstrap CPU main kernel routine stack wrapper
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 *
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 * Second part of main_bsp().
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 *
141
 */
174 jermar 142
void main_bsp_separated_stack(void)
143
{
1 jermar 144
    task_t *k;
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    thread_t *t;
207 decky 146
 
184 jermar 147
    the_initialize(THE);
517 jermar 148
    /*
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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.
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     */
153
    kconsole_init();
1037 decky 154
 
756 jermar 155
    /*
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     * Exception handler initialization, before architecture
673 jermar 157
     * starts adding its own handlers
578 palkovsky 158
     */
159
    exc_init();
755 jermar 160
 
161
    /*
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     * Memory management subsystems initialization.
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     */
26 jermar 164
    arch_pre_mm_init();
814 palkovsky 165
    /* Initialize at least 1 memory segment big enough for slab to work */
23 jermar 166
    frame_init();
789 palkovsky 167
    slab_cache_init();
756 jermar 168
    as_init();
23 jermar 169
    page_init();
170
    tlb_init();
814 palkovsky 171
    arch_post_mm_init();   
673 jermar 172
    version_print();
173
 
77 jermar 174
    printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
1 jermar 175
        config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
176
 
503 jermar 177
    arch_pre_smp_init();
34 jermar 178
    smp_init();
773 palkovsky 179
    /* Slab must be initialized AFTER we know the number of processors */
789 palkovsky 180
    slab_enable_cpucache();
773 palkovsky 181
 
149 jermar 182
    printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
27 jermar 183
    printf("config.cpu_count=%d\n", config.cpu_count);
1 jermar 184
    cpu_init();
860 decky 185
 
1 jermar 186
    calibrate_delay_loop();
187
    timeout_init();
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    scheduler_init();
189
    task_init();
190
    thread_init();
628 decky 191
 
1037 decky 192
    count_t i;
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    for (i = 0; i < init.cnt; i++)
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        printf("init[%d].addr=%P, init[%d].size=%d\n", i, init.tasks[i].addr, i, init.tasks[i].size);
955 palkovsky 195
 
196
    ipc_init();
1 jermar 197
    /*
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     * Create kernel task.
199
     */
1062 jermar 200
    k = task_create(AS_KERNEL, "KERNEL");
210 decky 201
    if (!k)
202
        panic("can't create kernel task\n");
860 decky 203
 
1 jermar 204
    /*
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     * Create the first thread.
206
     */
1062 jermar 207
    t = thread_create(kinit, NULL, k, 0, "kinit");
210 decky 208
    if (!t)
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        panic("can't create kinit thread\n");
1 jermar 210
    thread_ready(t);
860 decky 211
 
1 jermar 212
    /*
213
     * This call to scheduler() will return to kinit,
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     * starting the thread of kernel threads.
215
     */
216
    scheduler();
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    /* not reached */
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}
219
 
108 decky 220
 
458 decky 221
#ifdef CONFIG_SMP
108 decky 222
/** Application CPUs main kernel routine
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 *
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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 226
 * This function passes control directly to
227
 * main_ap_separated_stack().
108 decky 228
 *
413 jermar 229
 * Assuming interrupts_disable()'d.
108 decky 230
 *
1 jermar 231
 */
232
void main_ap(void)
233
{
234
    /*
235
     * Incrementing the active CPU counter will guarantee that the
236
     * pm_init() will not attempt to build GDT and IDT tables again.
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     * Neither frame_init() will do the complete thing. Neither cpu_init()
238
     * will do.
239
     */
240
    config.cpu_active++;
241
 
192 jermar 242
    /*
243
     * The THE structure is well defined because ctx.sp is used as stack.
244
     */
245
    the_initialize(THE);
298 decky 246
 
26 jermar 247
    arch_pre_mm_init();
1 jermar 248
    frame_init();
249
    page_init();
389 jermar 250
    tlb_init();
26 jermar 251
    arch_post_mm_init();
298 decky 252
 
1 jermar 253
    cpu_init();
298 decky 254
 
1 jermar 255
    calibrate_delay_loop();
256
 
257
    l_apic_init();
258
    l_apic_debug();
259
 
192 jermar 260
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 261
 
262
    /*
263
     * If we woke kmp up before we left the kernel stack, we could
264
     * collide with another CPU coming up. To prevent this, we
265
     * switch to this cpu's private stack prior to waking kmp up.
266
     */
414 jermar 267
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
47 jermar 268
    context_restore(&CPU->saved_context);
1 jermar 269
    /* not reached */
270
}
271
 
108 decky 272
 
273
/** Application CPUs main kernel routine stack wrapper
274
 *
275
 * Second part of main_ap().
276
 *
277
 */
1 jermar 278
void main_ap_separated_stack(void)
279
{
280
    /*
281
     * Configure timeouts for this cpu.
282
     */
283
    timeout_init();
284
 
285
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
286
    scheduler();
287
    /* not reached */
288
}
458 decky 289
#endif /* CONFIG_SMP */