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#include <fbos/init.h>
#include <fbos/printk.h>
#include <fbos/mm.h>
#include <fbos/sched.h>
#include <fbos/dt.h>
unsigned long init_stack[4][THREAD_SIZE / sizeof(unsigned long)];
struct task_struct tasks[4] = {
[TASK_INIT] = { .stack = init_stack[0], .addr = nullptr, .entry_offset = 0, },
[TASK_FIZZ] = { .stack = init_stack[1], .addr = nullptr, .entry_offset = 0, },
[TASK_BUZZ] = { .stack = init_stack[2], .addr = nullptr, .entry_offset = 0, },
[TASK_FIZZBUZZ] = { .stack = init_stack[3], .addr = nullptr, .entry_offset = 0, },
};
/*
* This is the main entry point of the kernel after head.S is done. This
* function can (and will) assume that everything has been reset and that we can
* start the whole thing.
*/
__noreturn __kernel void start_kernel(void *dtb)
{
printk("Welcome to FizzBuzz OS!\n");
// Extract information from the DTB blob.
struct initrd_addr addr = find_dt_initrd_addr(dtb);
extract_initrd((unsigned char *)addr.start, addr.end - addr.start);
// At this point everything has already been handled: setup the interrupt
// vector and enable the timer to start ticking and scheduling the three
// tasks at hand.
seconds_elapsed = 0;
setup_interrupts();
for (;;) {
// Put the machine on low power consumption since we are not doing
// anything fancy here.
asm volatile("wfi");
}
}
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