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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>
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>
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#include <mm/tlb.h>
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#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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675 jermar 58
#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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1 jermar 66
context_t ctx;
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523 jermar 68
/**
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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 72
 */
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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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506 decky 77
__address init_addr = 0;
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size_t init_size = 0;
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1 jermar 80
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);
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)
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{
814 palkovsky 105
    __address stackaddr;
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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();
628 decky 112
    config.init_addr = init_addr;
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    config.init_size = init_size;
210 decky 114
 
814 palkovsky 115
    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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    /* Avoid placing kernel on top of init */
822 palkovsky 118
    if (overlaps(stackaddr,CONFIG_STACK_SIZE,
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             config.init_addr, config.init_size)) {
814 palkovsky 120
 
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        stackaddr = ALIGN_UP(config.init_addr+config.init_size,
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                     CONFIG_STACK_SIZE);
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        config.init_size = ALIGN_UP(config.init_size,CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE;
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    } else {
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        config.kernel_size += CONFIG_STACK_SIZE;
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    }
210 decky 127
 
47 jermar 128
    context_save(&ctx);
814 palkovsky 129
    context_set(&ctx, FADDR(main_bsp_separated_stack),
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            stackaddr, CONFIG_STACK_SIZE);
47 jermar 131
    context_restore(&ctx);
1 jermar 132
    /* not reached */
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}
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108 decky 135
 
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/** Bootstrap CPU main kernel routine stack wrapper
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 *
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 * Second part of main_bsp().
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 *
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 */
174 jermar 141
void main_bsp_separated_stack(void)
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{
1 jermar 143
    task_t *k;
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    thread_t *t;
207 decky 145
 
184 jermar 146
    the_initialize(THE);
517 jermar 147
    /*
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     * kconsole data structures must be initialized very early
149
     * because other subsystems will register their respective
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     * commands.
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     */
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    kconsole_init();
623 jermar 153
 
756 jermar 154
    /*
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     * Exception handler initialization, before architecture
673 jermar 156
     * starts adding its own handlers
578 palkovsky 157
     */
158
    exc_init();
755 jermar 159
 
160
    /*
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     * Memory management subsystems initialization.
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     */
26 jermar 163
    arch_pre_mm_init();
814 palkovsky 164
    /* Initialize at least 1 memory segment big enough for slab to work */
23 jermar 165
    frame_init();
789 palkovsky 166
    slab_cache_init();
756 jermar 167
    as_init();
23 jermar 168
    page_init();
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    tlb_init();
814 palkovsky 170
    arch_post_mm_init();   
673 jermar 171
    version_print();
172
 
77 jermar 173
    printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
1 jermar 174
        config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
175
 
503 jermar 176
    arch_pre_smp_init();
34 jermar 177
    smp_init();
773 palkovsky 178
    /* Slab must be initialized AFTER we know the number of processors */
789 palkovsky 179
    slab_enable_cpucache();
773 palkovsky 180
 
149 jermar 181
    printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
27 jermar 182
    printf("config.cpu_count=%d\n", config.cpu_count);
1 jermar 183
    cpu_init();
860 decky 184
 
1 jermar 185
    calibrate_delay_loop();
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    timeout_init();
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    scheduler_init();
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    task_init();
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    thread_init();
628 decky 190
 
191
    if (config.init_size > 0)
799 palkovsky 192
        printf("config.init_addr=%P, config.init_size=%d\n", config.init_addr, config.init_size);
1 jermar 193
 
194
    /*
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     * Create kernel task.
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     */
756 jermar 197
    k = task_create(AS_KERNEL);
210 decky 198
    if (!k)
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        panic("can't create kernel task\n");
860 decky 200
 
1 jermar 201
    /*
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     * Create the first thread.
203
     */
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    t = thread_create(kinit, NULL, k, 0);
210 decky 205
    if (!t)
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        panic("can't create kinit thread\n");
1 jermar 207
    thread_ready(t);
860 decky 208
 
1 jermar 209
    /*
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     * This call to scheduler() will return to kinit,
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     * starting the thread of kernel threads.
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     */
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    scheduler();
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    /* not reached */
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}
216
 
108 decky 217
 
458 decky 218
#ifdef CONFIG_SMP
108 decky 219
/** 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 223
 * This function passes control directly to
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 * main_ap_separated_stack().
108 decky 225
 *
413 jermar 226
 * Assuming interrupts_disable()'d.
108 decky 227
 *
1 jermar 228
 */
229
void main_ap(void)
230
{
231
    /*
232
     * Incrementing the active CPU counter will guarantee that the
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     * 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()
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     * will do.
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     */
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    config.cpu_active++;
238
 
192 jermar 239
    /*
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     * The THE structure is well defined because ctx.sp is used as stack.
241
     */
242
    the_initialize(THE);
298 decky 243
 
26 jermar 244
    arch_pre_mm_init();
1 jermar 245
    frame_init();
246
    page_init();
389 jermar 247
    tlb_init();
26 jermar 248
    arch_post_mm_init();
298 decky 249
 
1 jermar 250
    cpu_init();
298 decky 251
 
1 jermar 252
    calibrate_delay_loop();
253
 
254
    l_apic_init();
255
    l_apic_debug();
256
 
192 jermar 257
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 258
 
259
    /*
260
     * If we woke kmp up before we left the kernel stack, we could
261
     * 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.
263
     */
414 jermar 264
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
47 jermar 265
    context_restore(&CPU->saved_context);
1 jermar 266
    /* not reached */
267
}
268
 
108 decky 269
 
270
/** Application CPUs main kernel routine stack wrapper
271
 *
272
 * Second part of main_ap().
273
 *
274
 */
1 jermar 275
void main_ap_separated_stack(void)
276
{
277
    /*
278
     * Configure timeouts for this cpu.
279
     */
280
    timeout_init();
281
 
282
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
283
    scheduler();
284
    /* not reached */
285
}
458 decky 286
#endif /* CONFIG_SMP */