int paging_init(uint32_t mem_size)
{
uint64_t mem_end = (uint64_t)mem_size * 1024ULL;
frames_count = (uint32_t)(mem_end / 0x1000ULL);
frames = (uint32_t*)static_alloc(BIT_INDEX(frames_count));
memset(frames, 0, BIT_INDEX(frames_count));
/* Create kernel page directory.
*/
kernel_directory = static_alloc(sizeof(*kernel_directory));
memset(kernel_directory, 0, sizeof(*kernel_directory));
/* Identity map pages up to heap address. We make the first page non-present so that NULL-pointer dereferences cause
* a page fault.
*/
frame_alloc(page_get(0, kernel_directory, true), 0);
uint32_t i = 0;
for (i = PAGE_SIZE; i < heap_addr; i += PAGE_SIZE) {
frame_alloc(page_get(i, kernel_directory, true), PAGE_FLAGS_PRESENT);
}
/* Map pages for the heap.
*/
for (; i < HEAP_ADDRESS + HEAP_SIZE_INIT; i += PAGE_SIZE) {
page_get(i, kernel_directory, true);
}
/* Set page fault handler.
*/
set_interrupt_handler(ISR_PAGE_FAULT, page_fault_handler);
page_directory_load(kernel_directory);
page_enable();
return 0;
}
void uri_error(int size_hint, char* fmt, va_alist)
#endif
{
va_list ap;
#if HAVE_STDARG_H
va_start(ap, fmt);
#else
va_start(ap);
#endif
static_alloc(&uri_errstr, &uri_errstr_size, 512 + size_hint);
vsprintf(uri_errstr, fmt, ap);
if(uri_modep(URI_MODE_ERROR_STDERR))
fprintf(stderr, "uri: %s", uri_errstr);
va_end(ap);
}