#include "process.h"

uint32_t **current_sp;

extern void puts(const char *s);

void start_task(Process *pentry) {
    __asm volatile(
        "mov %0, sp"
        : "=r" (*current_sp)
    );
    __asm volatile(
        "mov sp, %0\n"
        :: "r" (STACK_START(pentry->stack))
    );
    pentry->entrypoint();
    __asm volatile(
        "mov sp, %0\n"
        :: "r" (*current_sp)
    );
}

void run(ProcessTable *ptable) {
    while(1) {
        for (int i = 0; i<ptable->entries; i++) {
            Process *pentry = &ptable->process_list[i];

            start_task(pentry);
        }
    }
}