fix memory capacity

Author: tas0dev

src/include/mem/vmem.h

@@ -14,6 +14,10 @@ typedef enum {
 
 uint32_t vmem_virt_to_phys(uint32_t virt);
 uint32_t vmem_phys_to_virt(uint32_t phys);
+/* 64-bit helpers: return 64-bit physical/virtual addresses for kernels running in 64-bit mode.
+	These wrap the 32-bit routines and zero-extend; replace with full 64-bit implementation when available. */
+uint64_t vmem_virt_to_phys64(uint64_t virt);
+uint64_t vmem_phys_to_virt64(uint64_t phys);
 void vmem_set_offset(int32_t offset);
 void vmem_reset(void);
 void vmem_set_mode(vmem_mode_t mode);

src/kernel/mem/manager.c

@@ -250,8 +250,7 @@ void memory_init() {
 	uintptr_t heap_start = (base_end > bitmap_end) ? base_end : bitmap_end;
 	// 4KBページ境界に切り上げてアライン
 	heap_start = (heap_start + 0x0FFF) & ~0x0FFF;
-	/* 増やす: ブロックキャッシュなどで大きな動的確保が必要になるためヒープを256KBに拡張 */
-	uintptr_t heap_end = heap_start + 0x40000; // 256KBのヒープ領域
+	uintptr_t heap_end = heap_start + 0x100000; // 1MBのヒープ領域
 	mem_init((uint32_t)heap_start, (uint32_t)heap_end);
 	memmap_reserve((uint32_t)heap_start, (uint32_t)heap_end);
 }

src/kernel/mem/vmem.c

@@ -90,6 +90,15 @@ uint32_t vmem_virt_to_phys(uint32_t virt) {
 	return phys;
 }
 
+/* 64-bit wrapper: call 32-bit virt->phys and zero-extend to 64-bit.
+   This is a compatibility helper for subsystems that expect 64-bit DMA addresses.
+   Replace with a true 64-bit page-table walk implementation if/when needed. */
+uint64_t vmem_virt_to_phys64(uint64_t virt) {
+	uint32_t v32 = (uint32_t)virt;
+	uint32_t p32 = vmem_virt_to_phys(v32);
+	return (uint64_t)p32;
+}
+
 // 物理アドレス→仮想アドレス変換
 uint32_t vmem_phys_to_virt(uint32_t phys) {
 	/* Treat UINT32_MAX as error sentinel instead of 0 to allow phys==0 */
@@ -121,6 +130,12 @@ uint32_t vmem_phys_to_virt(uint32_t phys) {
 	}
 }
 
+uint64_t vmem_phys_to_virt64(uint64_t phys) {
+	uint32_t p32 = (uint32_t)phys;
+	uint32_t v32 = vmem_phys_to_virt(p32);
+	return (uint64_t)v32;
+}
+
 // オフセット設定
 void vmem_set_offset(int32_t offset) {
 	vmem_offset = offset;