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| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup main |
| * @{ |
| */ |
| |
| /** |
| * @file |
| * @brief Main initialization kernel function for all processors. |
| * |
| * During kernel boot, all processors, after architecture dependent |
| * initialization, start executing code found in this file. After |
| * bringing up all subsystems, control is passed to scheduler(). |
| * |
| * The bootstrap processor starts executing main_bsp() while |
| * the application processors start executing main_ap(). |
| * |
| * @see scheduler() |
| * @see main_bsp() |
| * @see main_ap() |
| */ |
| |
| #include <arch/asm.h> |
| #include <context.h> |
| #include <print.h> |
| #include <panic.h> |
| #include <debug.h> |
| #include <config.h> |
| #include <time/clock.h> |
| #include <proc/scheduler.h> |
| #include <proc/thread.h> |
| #include <proc/task.h> |
| #include <main/kinit.h> |
| #include <main/version.h> |
| #include <console/kconsole.h> |
| #include <cpu.h> |
| #include <align.h> |
| #include <interrupt.h> |
| #include <arch/mm/memory_init.h> |
| #include <mm/frame.h> |
| #include <mm/page.h> |
| #include <genarch/mm/page_pt.h> |
| #include <mm/tlb.h> |
| #include <mm/as.h> |
| #include <mm/slab.h> |
| #include <synch/waitq.h> |
| #include <synch/futex.h> |
| #include <arch/arch.h> |
| #include <arch.h> |
| #include <arch/faddr.h> |
| #include <typedefs.h> |
| #include <ipc/ipc.h> |
| #include <macros.h> |
| #include <adt/btree.h> |
| #include <console/klog.h> |
| |
| #ifdef CONFIG_SMP |
| #include <arch/smp/apic.h> |
| #include <arch/smp/mps.h> |
| #endif /* CONFIG_SMP */ |
| #include <smp/smp.h> |
| |
| /** Global configuration structure. */ |
| config_t config; |
| |
| /** Initial user-space tasks */ |
| init_t init = { |
| 0 |
| }; |
| |
| context_t ctx; |
| |
| /* |
| * These 'hardcoded' variables will be intialized by |
| * the linker or the low level assembler code with |
| * appropriate sizes and addresses. |
| */ |
| uintptr_t hardcoded_load_address = 0; /**< Virtual address of where the kernel is loaded. */ |
| size_t hardcoded_ktext_size = 0; /**< Size of the kernel code in bytes. */ |
| size_t hardcoded_kdata_size = 0; /**< Size of the kernel data in bytes. */ |
| |
| void main_bsp(void); |
| void main_ap(void); |
| |
| /* |
| * These two functions prevent stack from underflowing during the |
| * kernel boot phase when SP is set to the very top of the reserved |
| * space. The stack could get corrupted by a fooled compiler-generated |
| * pop sequence otherwise. |
| */ |
| static void main_bsp_separated_stack(void); |
| #ifdef CONFIG_SMP |
| static void main_ap_separated_stack(void); |
| #endif |
| |
| #define CONFIG_STACK_SIZE ((1<<STACK_FRAMES)*STACK_SIZE) |
| |
| /** Main kernel routine for bootstrap CPU. |
| * |
| * Initializes the kernel by bootstrap CPU. |
| * This function passes control directly to |
| * main_bsp_separated_stack(). |
| * |
| * Assuming interrupts_disable(). |
| * |
| */ |
| void main_bsp(void) |
| { |
| uintptr_t stackaddr; |
| |
| config.cpu_count = 1; |
| config.cpu_active = 1; |
| |
| config.base = hardcoded_load_address; |
| config.memory_size = get_memory_size(); |
| |
| config.kernel_size = ALIGN_UP(hardcoded_ktext_size + hardcoded_kdata_size, PAGE_SIZE); |
| stackaddr = config.base + config.kernel_size; |
| |
| /* Avoid placing kernel on top of init */ |
| count_t i; |
| bool overlap = false; |
| for (i = 0; i < init.cnt; i++) |
| if (PA_overlaps(stackaddr, CONFIG_STACK_SIZE, init.tasks[i].addr, init.tasks[i].size)) { |
| stackaddr = ALIGN_UP(init.tasks[i].addr + init.tasks[i].size, CONFIG_STACK_SIZE); |
| init.tasks[i].size = ALIGN_UP(init.tasks[i].size, CONFIG_STACK_SIZE) + CONFIG_STACK_SIZE; |
| overlap = true; |
| } |
| |
| if (!overlap) |
| config.kernel_size += CONFIG_STACK_SIZE; |
| |
| context_save(&ctx); |
| context_set(&ctx, FADDR(main_bsp_separated_stack), stackaddr, THREAD_STACK_SIZE); |
| context_restore(&ctx); |
| /* not reached */ |
| } |
| |
| |
| /** Main kernel routine for bootstrap CPU using new stack. |
| * |
| * Second part of main_bsp(). |
| * |
| */ |
| void main_bsp_separated_stack(void) |
| { |
| task_t *k; |
| thread_t *t; |
| count_t i; |
| |
| the_initialize(THE); |
| |
| /* |
| * kconsole data structures must be initialized very early |
| * because other subsystems will register their respective |
| * commands. |
| */ |
| kconsole_init(); |
| |
| /* |
| * Exception handler initialization, before architecture |
| * starts adding its own handlers |
| */ |
| exc_init(); |
| |
| /* |
| * Memory management subsystems initialization. |
| */ |
| arch_pre_mm_init(); |
| frame_init(); /* Initialize at least 1 memory segment big enough for slab to work */ |
| slab_cache_init(); |
| btree_init(); |
| as_init(); |
| page_init(); |
| tlb_init(); |
| arch_post_mm_init(); |
| |
| version_print(); |
| printf("%.*p: hardcoded_ktext_size=%zdK, hardcoded_kdata_size=%zdK\n", sizeof(uintptr_t) * 2, config.base, hardcoded_ktext_size >> 10, hardcoded_kdata_size >> 10); |
| |
| arch_pre_smp_init(); |
| smp_init(); |
| |
| slab_enable_cpucache(); /* Slab must be initialized AFTER we know the number of processors */ |
| |
| printf("config.memory_size=%zdM\n", config.memory_size >> 20); |
| printf("config.cpu_count=%zd\n", config.cpu_count); |
| cpu_init(); |
| |
| calibrate_delay_loop(); |
| clock_counter_init(); |
| timeout_init(); |
| scheduler_init(); |
| task_init(); |
| thread_init(); |
| futex_init(); |
| klog_init(); |
| |
| for (i = 0; i < init.cnt; i++) |
| printf("init[%zd].addr=%.*p, init[%zd].size=%zd\n", i, sizeof(uintptr_t) * 2, init.tasks[i].addr, i, init.tasks[i].size); |
| |
| ipc_init(); |
| |
| /* |
| * Create kernel task. |
| */ |
| k = task_create(AS_KERNEL, "KERNEL"); |
| if (!k) |
| panic("can't create kernel task\n"); |
| |
| /* |
| * Create the first thread. |
| */ |
| t = thread_create(kinit, NULL, k, 0, "kinit"); |
| if (!t) |
| panic("can't create kinit thread\n"); |
| thread_ready(t); |
| |
| /* |
| * This call to scheduler() will return to kinit, |
| * starting the thread of kernel threads. |
| */ |
| scheduler(); |
| /* not reached */ |
| } |
| |
| |
| #ifdef CONFIG_SMP |
| /** Main kernel routine for application CPUs. |
| * |
| * Executed by application processors, temporary stack |
| * is at ctx.sp which was set during BP boot. |
| * This function passes control directly to |
| * main_ap_separated_stack(). |
| * |
| * Assuming interrupts_disable()'d. |
| * |
| */ |
| void main_ap(void) |
| { |
| /* |
| * Incrementing the active CPU counter will guarantee that the |
| * pm_init() will not attempt to build GDT and IDT tables again. |
| * Neither frame_init() will do the complete thing. Neither cpu_init() |
| * will do. |
| */ |
| config.cpu_active++; |
| |
| /* |
| * The THE structure is well defined because ctx.sp is used as stack. |
| */ |
| the_initialize(THE); |
| |
| arch_pre_mm_init(); |
| frame_init(); |
| page_init(); |
| tlb_init(); |
| arch_post_mm_init(); |
| |
| cpu_init(); |
| |
| calibrate_delay_loop(); |
| |
| l_apic_init(); |
| l_apic_debug(); |
| |
| the_copy(THE, (the_t *) CPU->stack); |
| |
| /* |
| * If we woke kmp up before we left the kernel stack, we could |
| * collide with another CPU coming up. To prevent this, we |
| * switch to this cpu's private stack prior to waking kmp up. |
| */ |
| context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (uintptr_t) CPU->stack, CPU_STACK_SIZE); |
| context_restore(&CPU->saved_context); |
| /* not reached */ |
| } |
| |
| |
| /** Main kernel routine for application CPUs using new stack. |
| * |
| * Second part of main_ap(). |
| * |
| */ |
| void main_ap_separated_stack(void) |
| { |
| /* |
| * Configure timeouts for this cpu. |
| */ |
| timeout_init(); |
| |
| waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
| scheduler(); |
| /* not reached */ |
| } |
| #endif /* CONFIG_SMP */ |
| |
| /** @} |
| */ |