eduOS/kernel/main.c
2016-01-10 21:50:24 +01:00

125 lines
3.7 KiB
C

/*
* Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
* 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.
* * Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 REGENTS OR CONTRIBUTORS 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 <eduos/stddef.h>
#include <eduos/stdio.h>
#include <eduos/string.h>
#include <eduos/time.h>
#include <eduos/tasks.h>
#include <eduos/processor.h>
#include <eduos/tasks.h>
#include <eduos/syscall.h>
#include <eduos/memory.h>
#include <eduos/vma.h>
#include <eduos/fs.h>
#include <asm/irq.h>
#include <asm/irqflags.h>
#include <asm/atomic.h>
#include <asm/page.h>
#include <asm/uart.h>
/*
* Note that linker symbols are not variables, they have no memory allocated for
* maintaining a value, rather their address is their value.
*/
extern const void kernel_start;
extern const void kernel_end;
extern const void bss_start;
extern const void bss_end;
extern char __BUILD_DATE;
extern char __BUILD_TIME;
/* Page frame counters */
extern atomic_int32_t total_pages;
extern atomic_int32_t total_allocated_pages;
extern atomic_int32_t total_available_pages;
static int foo(void* arg)
{
int i;
for(i=0; i<2; i++) {
kprintf("hello from %s\n", (char*) arg);
}
// demo of an exception
/*i = 0;
i = 32 / i;
kprintf("i = %d\n", i);*/
return 0;
}
static int eduos_init(void)
{
// initialize .bss section
memset((void*)&bss_start, 0x00, ((size_t) &bss_end - (size_t) &bss_start));
koutput_init();
system_init();
irq_init();
timer_init();
multitasking_init();
memory_init();
#ifdef CONFIG_UART
uart_init();
#endif
initrd_init();
return 0;
}
int main(void)
{
char* argv[] = {"/bin/hello", NULL};
eduos_init();
irq_enable();
system_calibration();
kprintf("This is %s Build %u, %u\n", PACKAGE_STRING, &__BUILD_DATE, &__BUILD_TIME);
kprintf("Kernel starts at %p and ends at %p\n", &kernel_start, &kernel_end);
kprintf("Processor frequency: %u MHz\n", get_cpu_frequency());
kprintf("Total memory: %lu KiB\n", atomic_int32_read(&total_pages) * PAGE_SIZE / 1024);
kprintf("Current allocated memory: %lu KiB\n", atomic_int32_read(&total_allocated_pages) * PAGE_SIZE / 1024);
kprintf("Curren available memory: %lu KiB\n", atomic_int32_read(&total_available_pages) * PAGE_SIZE / 1024);
create_kernel_task(NULL, foo, "foo", NORMAL_PRIO);
create_user_task(NULL, "/bin/hello", argv);
#if 0
kputs("Filesystem:\n");
list_fs(fs_root, 1);
#endif
while(1) {
HALT;
}
return 0;
}