Add physical page (frame) allocator.

1 files changed, 15 insertions, 2 deletions

diff --git a/kernel/l0/kmain.c b/kernel/l0/kmain.c
index 7665cb0..b4e2ef1 100644
--- a/kernel/l0/kmain.c
+++ b/kernel/l0/kmain.c
@@ -5,6 +5,7 @@
 
 #include <gdt.h>
 #include <idt.h>
+#include <frame.h>
 
 void breakpoint_handler(registers_t *regs) {
 	dbg_printf("Breakpoint! (int3)\n");
@@ -23,13 +24,25 @@ void kmain(struct multiboot_info_t *mbd, int32_t mb_magic) {
 
 	idt_init(); dbg_printf("IDT set up.\n");
 	idt_set_ex_handler(EX_BREAKPOINT, breakpoint_handler);
-
-	asm volatile("int $0x3");
+	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();
+
+	// 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.");
 }