/*
* 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 <panic.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/smp/apic.h>
#include <arch/smp/mps.h>
#endif /* __SMP__ */
#include <smp/smp.h>
#include <mm/frame.h>
#include <mm/page.h>
#include <mm/tlb.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.
*/
__address 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_pre_mm_init();
heap_init(config.base + hardcoded_ktext_size + hardcoded_kdata_size, CONFIG_HEAP_SIZE);
frame_init();
page_init();
tlb_init();
arch_post_mm_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);
arch_late_init();
smp_init();
printf("config.cpu_count=%d\n", config.
cpu_count);
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_pre_mm_init();
frame_init();
page_init();
arch_post_mm_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.
*/
CPU->saved_context.sp = (__address) &CPU->stack[CPU_STACK_SIZE-8];
CPU->saved_context.pc = (__address) main_ap_separated_stack;
context_restore(&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__*/