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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>
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#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/heap.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 <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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#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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/**
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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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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);
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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 93
 
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/** Bootstrap CPU main kernel routine
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 *
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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 102
 */
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void main_bsp(void)
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{
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    config.cpu_count = 1;
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    config.cpu_active = 1;
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369 jermar 108
    config.base = hardcoded_load_address;
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    config.memory_size = get_memory_size();
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    config.init_addr = init_addr;
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    config.init_size = init_size;
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    if (init_size > 0)
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        config.heap_addr = init_addr + init_size;
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    else
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        config.heap_addr = hardcoded_load_address + hardcoded_ktext_size + hardcoded_kdata_size;
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    config.heap_size = CONFIG_HEAP_SIZE + (config.memory_size / FRAME_SIZE) * sizeof(frame_t);
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120
    config.kernel_size = ALIGN_UP(config.heap_addr - hardcoded_load_address + config.heap_size, PAGE_SIZE);
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    config.heap_delta = config.kernel_size - (config.heap_addr - hardcoded_load_address + config.heap_size);
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    config.kernel_size = config.kernel_size + CONFIG_STACK_SIZE;
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    context_save(&ctx);
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    context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + config.kernel_size, CONFIG_STACK_SIZE);
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    context_restore(&ctx);
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    /* not reached */
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}
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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 136
void main_bsp_separated_stack(void)
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{
703 jermar 138
    as_t *as;
1 jermar 139
    task_t *k;
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    thread_t *t;
207 decky 141
 
184 jermar 142
    the_initialize(THE);
235 decky 143
 
517 jermar 144
    /*
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     * kconsole data structures must be initialized very early
146
     * because other subsystems will register their respective
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     * commands.
148
     */
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    kconsole_init();
623 jermar 150
 
578 palkovsky 151
    /* Exception handler initialization, before architecture
673 jermar 152
     * starts adding its own handlers
578 palkovsky 153
     */
154
    exc_init();
517 jermar 155
 
26 jermar 156
    arch_pre_mm_init();
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    early_heap_init(config.heap_addr, config.heap_size + config.heap_delta);
23 jermar 158
    frame_init();
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    page_init();
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    tlb_init();
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    arch_post_mm_init();
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163
    version_print();
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    printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
1 jermar 166
        config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
167
 
503 jermar 168
    arch_pre_smp_init();
34 jermar 169
    smp_init();
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    printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
27 jermar 171
    printf("config.cpu_count=%d\n", config.cpu_count);
1 jermar 172
 
173
    cpu_init();
220 vana 174
 
1 jermar 175
    calibrate_delay_loop();
640 jermar 176
 
1 jermar 177
    timeout_init();
178
    scheduler_init();
179
    task_init();
180
    thread_init();
628 decky 181
 
182
    if (config.init_size > 0)
183
        printf("config.init_addr=%X, config.init_size=%d\n", config.init_addr, config.init_size);
1 jermar 184
 
185
    /*
703 jermar 186
     * Create kernel address space.
1 jermar 187
     */
703 jermar 188
    as = as_create(GET_PTL0_ADDRESS());
189
    if (!as)
190
        panic("can't create kernel address space\n");
1 jermar 191
 
192
    /*
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     * Create kernel task.
194
     */
703 jermar 195
    k = task_create(as);
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    if (!k)
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        panic("can't create kernel task\n");
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1 jermar 199
    /*
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     * Create the first thread.
201
     */
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    t = thread_create(kinit, NULL, k, 0);
210 decky 203
    if (!t)
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        panic("can't create kinit thread\n");
1 jermar 205
    thread_ready(t);
675 jermar 206
 
1 jermar 207
    /*
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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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     */
211
    scheduler();
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    /* not reached */
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}
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108 decky 215
 
458 decky 216
#ifdef CONFIG_SMP
108 decky 217
/** 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 221
 * This function passes control directly to
222
 * main_ap_separated_stack().
108 decky 223
 *
413 jermar 224
 * Assuming interrupts_disable()'d.
108 decky 225
 *
1 jermar 226
 */
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void main_ap(void)
228
{
229
    /*
230
     * Incrementing the active CPU counter will guarantee that the
231
     * pm_init() will not attempt to build GDT and IDT tables again.
232
     * Neither frame_init() will do the complete thing. Neither cpu_init()
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     * will do.
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     */
235
    config.cpu_active++;
236
 
192 jermar 237
    /*
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     * The THE structure is well defined because ctx.sp is used as stack.
239
     */
240
    the_initialize(THE);
298 decky 241
 
26 jermar 242
    arch_pre_mm_init();
1 jermar 243
    frame_init();
244
    page_init();
389 jermar 245
    tlb_init();
26 jermar 246
    arch_post_mm_init();
298 decky 247
 
1 jermar 248
    cpu_init();
298 decky 249
 
1 jermar 250
    calibrate_delay_loop();
251
 
252
    l_apic_init();
253
    l_apic_debug();
254
 
192 jermar 255
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 256
 
257
    /*
258
     * If we woke kmp up before we left the kernel stack, we could
259
     * 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.
261
     */
414 jermar 262
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
47 jermar 263
    context_restore(&CPU->saved_context);
1 jermar 264
    /* not reached */
265
}
266
 
108 decky 267
 
268
/** Application CPUs main kernel routine stack wrapper
269
 *
270
 * Second part of main_ap().
271
 *
272
 */
1 jermar 273
void main_ap_separated_stack(void)
274
{
275
    /*
276
     * Configure timeouts for this cpu.
277
     */
278
    timeout_init();
279
 
280
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
281
    scheduler();
282
    /* not reached */
283
}
458 decky 284
#endif /* CONFIG_SMP */