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#include "drivers/uart.h"
#include "kernel/pmm.h"
#include "kernel/mm.h"
void print_hex(uint64_t val)
{
char buf[17];
buf[16] = 0;
const char *digits = "0123456789ABCDEF";
for (int i = 15; i >= 0; i--)
{
buf[i] = digits[val & 0xf];
val >>= 4;
}
Drivers::uart_puts("0x");
Drivers::uart_puts(buf);
}
extern "C" void kernel_main()
{
Drivers::uart_init();
Drivers::uart_puts("\n[Modern DOS Kernel] Booted in S-Mode.\n");
Drivers::uart_puts("2025 Richard Qin\n");
Drivers::uart_puts("\n");
Drivers::uart_puts("[Kernel] Initializing PMM...\n");
PMM::init();
Drivers::uart_puts("[Kernel] PMM initialized.\n");
Drivers::uart_puts("[Kernel] Testing alloc_page...\n");
void *p1 = PMM::alloc_page();
void *p2 = PMM::alloc_page();
Drivers::uart_puts("Allocated Page 1: ");
print_hex((uint64_t)p1);
Drivers::uart_puts("\n");
Drivers::uart_puts("Allocated Page 2: ");
print_hex((uint64_t)p2);
Drivers::uart_puts("\n");
Drivers::uart_puts("[Kernel] Freeing Page 1...\n");
PMM::free_page(p1);
void *p3 = PMM::alloc_page();
Drivers::uart_puts("Allocated Page 3: ");
print_hex((uint64_t)p3);
Drivers::uart_puts("\n");
if (p3 == p1)
{
Drivers::uart_puts("[Test Passed] Reuse freed memory successfully.\n");
}
else
{
Drivers::uart_puts("[Test Failed] Memory leak or logic error.\n");
}
VM::kvminit();
Drivers::uart_puts("[Boot] Kernel page table created.\n");
VM::kvminithart();
Drivers::uart_puts("[Boot] MMU ENABLED! We are now using virtual addresses.\n");
while (1)
{
}
}
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