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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 <mm/slab.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 67
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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__address init_addr = 0;
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size_t init_size = 0;
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1 jermar 81
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
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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 103
 */
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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 109
    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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651 decky 119
    config.heap_size = CONFIG_HEAP_SIZE + (config.memory_size / FRAME_SIZE) * sizeof(frame_t);
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121
    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, 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 137
void main_bsp_separated_stack(void)
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{
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
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     * because other subsystems will register their respective
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     * commands.
148
     */
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    kconsole_init();
623 jermar 150
 
756 jermar 151
    /*
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     * Exception handler initialization, before architecture
673 jermar 153
     * starts adding its own handlers
578 palkovsky 154
     */
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    exc_init();
755 jermar 156
 
157
    /*
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     * Memory management subsystems initialization.
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     */
26 jermar 160
    arch_pre_mm_init();
651 decky 161
    early_heap_init(config.heap_addr, config.heap_size + config.heap_delta);
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    frame_init();
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    as_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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168
    version_print();
169
 
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    printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
1 jermar 171
        config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
172
 
503 jermar 173
    arch_pre_smp_init();
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    smp_init();
773 palkovsky 175
    /* Slab must be initialized AFTER we know the number of processors */
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    slab_cache_init();
177
 
149 jermar 178
    printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
27 jermar 179
    printf("config.cpu_count=%d\n", config.cpu_count);
1 jermar 180
 
181
    cpu_init();
220 vana 182
 
1 jermar 183
    calibrate_delay_loop();
640 jermar 184
 
1 jermar 185
    timeout_init();
186
    scheduler_init();
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    task_init();
188
    thread_init();
628 decky 189
 
190
    if (config.init_size > 0)
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        printf("config.init_addr=%X, config.init_size=%d\n", config.init_addr, config.init_size);
1 jermar 192
 
193
    /*
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     * Create kernel task.
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     */
756 jermar 196
    k = task_create(AS_KERNEL);
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    if (!k)
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        panic("can't create kernel task\n");
199
 
1 jermar 200
    /*
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     * Create the first thread.
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     */
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    t = thread_create(kinit, NULL, k, 0);
210 decky 204
    if (!t)
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        panic("can't create kinit thread\n");
1 jermar 206
    thread_ready(t);
675 jermar 207
 
1 jermar 208
    /*
209
     * This call to scheduler() will return to kinit,
210
     * starting the thread of kernel threads.
211
     */
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    scheduler();
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    /* not reached */
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}
215
 
108 decky 216
 
458 decky 217
#ifdef CONFIG_SMP
108 decky 218
/** Application CPUs main kernel routine
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 *
220
 * Executed by application processors, temporary stack
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 * is at ctx.sp which was set during BP boot.
675 jermar 222
 * This function passes control directly to
223
 * main_ap_separated_stack().
108 decky 224
 *
413 jermar 225
 * Assuming interrupts_disable()'d.
108 decky 226
 *
1 jermar 227
 */
228
void main_ap(void)
229
{
230
    /*
231
     * Incrementing the active CPU counter will guarantee that the
232
     * 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.
235
     */
236
    config.cpu_active++;
237
 
192 jermar 238
    /*
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     * The THE structure is well defined because ctx.sp is used as stack.
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     */
241
    the_initialize(THE);
298 decky 242
 
26 jermar 243
    arch_pre_mm_init();
1 jermar 244
    frame_init();
245
    page_init();
389 jermar 246
    tlb_init();
26 jermar 247
    arch_post_mm_init();
298 decky 248
 
1 jermar 249
    cpu_init();
298 decky 250
 
1 jermar 251
    calibrate_delay_loop();
252
 
253
    l_apic_init();
254
    l_apic_debug();
255
 
192 jermar 256
    the_copy(THE, (the_t *) CPU->stack);
1 jermar 257
 
258
    /*
259
     * If we woke kmp up before we left the kernel stack, we could
260
     * collide with another CPU coming up. To prevent this, we
261
     * switch to this cpu's private stack prior to waking kmp up.
262
     */
414 jermar 263
    context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
47 jermar 264
    context_restore(&CPU->saved_context);
1 jermar 265
    /* not reached */
266
}
267
 
108 decky 268
 
269
/** Application CPUs main kernel routine stack wrapper
270
 *
271
 * Second part of main_ap().
272
 *
273
 */
1 jermar 274
void main_ap_separated_stack(void)
275
{
276
    /*
277
     * Configure timeouts for this cpu.
278
     */
279
    timeout_init();
280
 
281
    waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
282
    scheduler();
283
    /* not reached */
284
}
458 decky 285
#endif /* CONFIG_SMP */