/*
* 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 <main/kinit.h>
#include <main/uinit.h>
#include <config.h>
#include <arch.h>
#include <proc/scheduler.h>
#include <proc/task.h>
#include <proc/thread.h>
#include <panic.h>
#include <func.h>
#include <cpu.h>
#include <arch/asm.h>
#include <mm/page.h>
#include <arch/mm/page.h>
#include <mm/as.h>
#include <mm/frame.h>
#include <print.h>
#include <memstr.h>
#include <console/console.h>
#include <interrupt.h>
#include <console/kconsole.h>
#ifdef CONFIG_SMP
#include <arch/smp/mps.h>
#endif /* CONFIG_SMP */
#include <synch/waitq.h>
#include <synch/spinlock.h>
#ifdef CONFIG_TEST
#include <test.h>
#endif /* CONFIG_TEST */
/** Kernel initialization thread.
*
* kinit takes care of higher level kernel
* initialization (i.e. thread creation,
* userspace initialization etc.).
*
* @param arg Not used.
*/
void kinit(void *arg)
{
thread_t *t;
as_t *as;
as_area_t *a;
index_t frame, frames;
index_t pfn;
task_t *u;
interrupts_disable();
#ifdef CONFIG_SMP
if (config.cpu_count > 1) {
/*
* Create the kmp thread and wait for its completion.
* cpu1 through cpuN-1 will come up consecutively and
* not mess together with kcpulb threads.
* Just a beautification.
*/
if ((t = thread_create(kmp, NULL, TASK, 0))) {
spinlock_lock(&t->lock);
t->flags |= X_WIRED;
t->cpu = &cpus[0];
spinlock_unlock(&t->lock);
thread_ready(t);
waitq_sleep(&kmp_completion_wq);
}
else panic("thread_create/kmp\n");
}
#endif /* CONFIG_SMP */
/*
* Now that all CPUs are up, we can report what we've found.
*/
cpu_list();
#ifdef CONFIG_SMP
if (config.cpu_count > 1) {
int i;
/*
* For each CPU, create its load balancing thread.
*/
for (i = 0; i < config.cpu_count; i++) {
if ((t = thread_create(kcpulb, NULL, TASK, 0))) {
spinlock_lock(&t->lock);
t->flags |= X_WIRED;
t->cpu = &cpus[i];
spinlock_unlock(&t->lock);
thread_ready(t);
}
else panic("thread_create/kcpulb\n");
}
}
#endif /* CONFIG_SMP */
/*
* At this point SMP, if present, is configured.
*/
arch_post_smp_init();
/*
* Create kernel console.
*/
if ((t = thread_create(kconsole, "kconsole", TASK, 0)))
thread_ready(t);
else
panic("thread_create/kconsole\n");
interrupts_enable();
if (config.init_size > 0) {
/*
* Create the first user task.
*/
if (KA2PA(config.init_addr) % FRAME_SIZE)
panic("config.init_addr is not frame aligned");
as = as_create(NULL);
if (!as)
panic("as_create\n");
u = task_create(as);
if (!u)
panic("task_create\n");
t = thread_create(uinit, NULL, u, THREAD_USER_STACK);
if (!t)
panic("thread_create\n");
/*
* Create the text as_area and copy the userspace code there.
*/
frame = KA2PA(config.init_addr) / FRAME_SIZE;
frames = config.init_size / FRAME_SIZE;
if (config.init_size % FRAME_SIZE > 0)
frames++;
a = as_area_create(as, AS_AREA_TEXT, frames, UTEXT_ADDRESS);
if (!a)
panic("as_area_create: text\n");
for (pfn = 0; pfn < frames; pfn++)
as_area_set_mapping(a, pfn, frame + pfn);
/*
* Create the data as_area.
*/
a = as_area_create(as, AS_AREA_STACK, 1, USTACK_ADDRESS);
if (!a)
panic("as_area_create: stack\n");
thread_ready(t);
}
#ifdef CONFIG_TEST
test();
#endif /* CONFIG_TEST */
if (!stdin) {
while (1) {
thread_sleep(1);
}
}
}