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#include <multiboot.h>
#include <config.h>
#include <dbglog.h>
#include <sys.h>
#include <gdt.h>
#include <idt.h>
#include <frame.h>
#include <paging.h>
#include <region.h>
void breakpoint_handler(registers_t *regs) {
dbg_printf("Breakpoint! (int3)\n");
BOCHS_BREAKPOINT;
}
void kmain(struct multiboot_info_t *mbd, int32_t mb_magic) {
dbglog_setup();
dbg_printf("Hello, kernel World!\n");
dbg_printf("This is %s, version %s.\n", OS_NAME, OS_VERSION);
ASSERT(mb_magic == MULTIBOOT_BOOTLOADER_MAGIC);
gdt_init(); dbg_printf("GDT set up.\n");
idt_init(); dbg_printf("IDT set up.\n");
idt_set_ex_handler(EX_BREAKPOINT, breakpoint_handler);
asm volatile("int $0x3"); // test breakpoint
size_t total_ram = ((mbd->mem_upper + mbd->mem_lower) * 1024);
dbg_printf("Total ram: %d Kb\n", total_ram / 1024);
// paging_init(totalRam);
// used for allocation of data structures before malloc is set up
// a pointer to this pointer is passed to the functions that might have
// to allocate memory ; they just increment it of the allocated quantity
void* kernel_data_end = (void*)K_END_ADDR;
frame_init_allocator(total_ram, &kernel_data_end);
dbg_printf("kernel_data_end: 0x%p\n", kernel_data_end);
dbg_print_frame_stats();
paging_setup(kernel_data_end);
dbg_printf("Paging seems to be working!\n");
region_allocator_init(kernel_data_end);
dbg_print_region_stats();
size_t p = region_alloc(0x1000, REGION_T_HW, 0);
dbg_printf("Allocated one-page region: 0x%p\n", p);
dbg_print_region_stats();
size_t q = region_alloc(0x1000, REGION_T_HW, 0);
dbg_printf("Allocated one-page region: 0x%p\n", q);
dbg_print_region_stats();
size_t r = region_alloc(0x2000, REGION_T_HW, 0);
dbg_printf("Allocated two-page region: 0x%p\n", r);
dbg_print_region_stats();
size_t s = region_alloc(0x10000, REGION_T_CORE_HEAP, 0);
dbg_printf("Allocated 16-page region: 0x%p\n", s);
dbg_print_region_stats();
region_free(p);
dbg_printf("Freed region 0x%p\n", p);
dbg_print_region_stats();
region_free(q);
dbg_printf("Freed region 0x%p\n", q);
dbg_print_region_stats();
region_free(r);
dbg_printf("Freed region 0x%p\n", r);
dbg_print_region_stats();
region_free(s);
dbg_printf("Freed region 0x%p\n", s);
dbg_print_region_stats();
// TODO:
// - setup allocator for physical pages (eg: buddy allocator, see OSDev wiki)
// - setup allocator for virtual memory space
// - setup paging
PANIC("Reached kmain end! Falling off the edge.");
}
/* vim: set ts=4 sw=4 tw=0 noet :*/
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