/*
* kmain
*
* This is the first thing that executes when the kernel starts. Any
* initialisation e.g. interrupt handlers must be done at the start of
* the function. This function should never return.
*/
void kmain(multiboot * mb)
{
setup_segmentation();
setup_interrupts();
kmalloc_init();
/*
* Clear the screen
*/
unsigned int x;
unsigned int y;
for (y = 0; y < SCREEN_HEIGHT; y++)
for (x = 0; x < SCREEN_WIDTH; x++)
screen[y * SCREEN_WIDTH + x].c = ' ';
/*
* Place the cursor on line 0 to start with
*/
move_cursor(xpos, ypos);
kprintf("%s\n%s\n%s\n\n\n\n", VERSION, COPYRIGHT, DISCLAIMER);
assert(1 == mb->mods_count);
assert(mb->mods_addr[0].mod_end < 2 * MB);
filesystem = (char *)mb->mods_addr[0].mod_start;
/*
* Check here for the size of the RAM disk. Because we use a
* hard-coded value of 2MB for the start of the kernel's private
* data area, we can't safely work with filesystems that extend
* into this area. This is really just a hack to avoid the
* additional complexity of computing the right place to start
* the kernel and page memory regions, but suffices for our
* purposes.
*/
if (mb->mods_addr[0].mod_end >= 2 * MB)
assert
(!"Filesystem goes beyond 2Mb limit. Please use smaller filesystem.");
pid_t pid = start_process(launch_shell);
input_pipe = processes[pid].filedesc[STDIN_FILENO]->p;
/*
* Go in to user mode and enable interrupts
*/
enter_user_mode();
/*
* Loop indenitely... we should never return from this function
*/
/*
* Pretty soon a context switch will occur, and the processor
* will jump out of this loop and start executing the first
* scheduled process
*/
while (1) ;
}
* @brief kernel main
*
* @author
*
*
* @date
*/
#include <kernel.h>
#include <task.h>
#include <sched.h>
#include <device.h>
#include <assert.h>
uint32_t global_data;
int kmain(int argc __attribute__((unused)), char** argv __attribute__((unused)), uint32_t table)
{
app_startup();
global_data = table;
/* add your code up to assert statement */
int d;
setup();
/* Call function at 0xA0000000 */
d = enter_user_mode();
//restore();
assert(0); /* should never get here */
}
