| 0,0 → 1,202 |
|---|
| /* |
| * 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. |
| */ |
| |
| #include <arch/asm.h> |
| #include <arch/context.h> |
| #include <print.h> |
| #include <config.h> |
| #include <time/clock.h> |
| #include <proc/scheduler.h> |
| #include <proc/thread.h> |
| #include <proc/task.h> |
| #include <mm/vm.h> |
| #include <main/kinit.h> |
| #include <cpu.h> |
| #include <mm/heap.h> |
| |
| #ifdef __SMP__ |
| #include <arch/apic.h> |
| #include <arch/mp.h> |
| #endif /* __SMP__ */ |
| |
| #include <mm/frame.h> |
| #include <mm/page.h> |
| #include <synch/waitq.h> |
| |
| #include <arch.h> |
| |
| char *project = "SPARTAN kernel"; |
| char *copyright = "Copyright (C) 2001-2005 Jakub Jermar"; |
| |
| config_t config; |
| context_t ctx; |
| |
| /* |
| * These 'hardcoded' variables will be intialised by |
| * the linker with appropriate sizes and addresses. |
| */ |
| __u32 hardcoded_load_address = 0; |
| __u32 hardcoded_ktext_size = 0; |
| __u32 hardcoded_kdata_size = 0; |
| |
| 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); |
| static void main_ap_separated_stack(void); |
| |
| /* |
| * Executed by the bootstrap processor. cpu_priority_high()'d |
| */ |
| void main_bsp(void) |
| { |
| config.cpu_count = 1; |
| config.cpu_active = 1; |
| |
| config.base = hardcoded_load_address; |
| config.memory_size = CONFIG_MEMORY_SIZE; |
| config.kernel_size = hardcoded_ktext_size + hardcoded_kdata_size + CONFIG_HEAP_SIZE + CONFIG_STACK_SIZE; |
| |
| context_save(&ctx); |
| ctx.sp = config.base + config.kernel_size - 8; |
| ctx.pc = (__address) main_bsp_separated_stack; |
| context_restore(&ctx); |
| /* not reached */ |
| } |
| |
| void main_bsp_separated_stack(void) { |
| vm_t *m; |
| task_t *k; |
| thread_t *t; |
| |
| arch_init(); |
| |
| printf("%s, %s\n", project, copyright); |
| |
| printf("%L: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n", |
| config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024); |
| |
| heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_HEAP_SIZE); |
| frame_init(); |
| page_init(); |
| |
| #ifdef __SMP__ |
| mp_init(); /* Multiprocessor */ |
| #endif /* __SMP__ */ |
| |
| cpu_init(); |
| calibrate_delay_loop(); |
| |
| timeout_init(); |
| scheduler_init(); |
| task_init(); |
| thread_init(); |
| |
| /* |
| * Create kernel vm mapping. |
| */ |
| m = vm_create(); |
| if (!m) panic("can't create kernel vm address space\n"); |
| |
| /* |
| * Create kernel task. |
| */ |
| k = task_create(m); |
| if (!k) panic("can't create kernel task\n"); |
| |
| /* |
| * Create the first thread. |
| */ |
| t = thread_create(kinit, NULL, k, 0); |
| 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 __SMP__ |
| /* |
| * Executed by application processors. cpu_priority_high()'d |
| * Temporary stack is at ctx.sp which was set during BP boot. |
| */ |
| 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++; |
| |
| arch_init(); |
| frame_init(); |
| page_init(); |
| |
| cpu_init(); |
| calibrate_delay_loop(); |
| |
| l_apic_init(); |
| l_apic_debug(); |
| |
| |
| /* |
| * 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. |
| */ |
| the->cpu->saved_context.sp = (__address) &the->cpu->stack[CPU_STACK_SIZE-8]; |
| the->cpu->saved_context.pc = (__address) main_ap_separated_stack; |
| context_restore(&the->cpu->saved_context); |
| /* not reached */ |
| } |
| |
| void main_ap_separated_stack(void) |
| { |
| /* |
| * Configure timeouts for this cpu. |
| */ |
| timeout_init(); |
| |
| waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST); |
| scheduler(); |
| /* not reached */ |
| } |
| #endif /* __SMP__*/ |