111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/*
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* Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <eduos/stddef.h>
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#include <eduos/stdio.h>
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#include <eduos/string.h>
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#include <eduos/time.h>
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#include <eduos/tasks.h>
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#include <eduos/processor.h>
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#include <eduos/tasks.h>
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#include <eduos/syscall.h>
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#include <asm/irq.h>
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#include <asm/irqflags.h>
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/*
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* Note that linker symbols are not variables, they have no memory allocated for
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* maintaining a value, rather their address is their value.
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*/
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extern const void kernel_start;
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extern const void kernel_end;
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extern const void bss_start;
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extern const void bss_end;
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extern char __BUILD_DATE;
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extern char __BUILD_TIME;
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/*static*/ int userfoo(void* arg)
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{
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//SYSCALL1(__NR_write, "hello from userfoo\n");
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//kprintf("hello from %s\n", (char*) arg);
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while(1) { }
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return 0;
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}
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static int foo(void* arg)
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{
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int i;
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for(i=0; i<10; i++) {
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kprintf("hello from %s\n", (char*) arg);
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}
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// demo of an exception
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/*i = 0;
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i = 32 / i;
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kprintf("i = %d\n", i);*/
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return 0;
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}
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static int eduos_init(void)
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{
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// initialize .bss section
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memset((void*)&bss_start, 0x00, ((size_t) &bss_end - (size_t) &bss_start));
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system_init();
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irq_init();
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timer_init();
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koutput_init();
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multitasking_init();
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return 0;
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}
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int main(void)
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{
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tid_t id1;
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tid_t id2;
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eduos_init();
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kprintf("This is eduOS %s Build %u, %u\n", EDUOS_VERSION, &__BUILD_DATE, &__BUILD_TIME);
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kprintf("Kernel starts at %p and ends at %p\n", &kernel_start, &kernel_end);
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irq_enable();
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system_calibration();
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kprintf("Processor frequency: %u MHz\n", get_cpu_frequency());
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create_kernel_task(&id1, foo, "foo1", NORMAL_PRIO);
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create_user_task(&id2, userfoo, "userfoo", NORMAL_PRIO);
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while(1) {
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HALT;
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}
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return 0;
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}
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