From bb036c5db61937697d0f34fc24b65e1259bc6bb0 Mon Sep 17 00:00:00 2001 From: Raghuram Subramani Date: Sun, 5 Jan 2025 13:04:24 -0500 Subject: kernel: mm: Introduce a WIP physical_mm --- kernel/include/mm/physical_mm.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 kernel/include/mm/physical_mm.h (limited to 'kernel/include') diff --git a/kernel/include/mm/physical_mm.h b/kernel/include/mm/physical_mm.h new file mode 100644 index 0000000..503a76f --- /dev/null +++ b/kernel/include/mm/physical_mm.h @@ -0,0 +1,37 @@ +/* + * CMOS + * Copyright (C) 2025 Raghuram Subramani + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef __mm_physical_mm_h +#define __mm_physical_mm_h + +#include + +/* + * A byte has 8 bits, hence we can store information for up to 8 blocks at a + * time + */ +#define BLOCKS_PER_BYTE 8 + +/* TODO: Update this to 2MiB when PAE is enabled */ +#define BLOCK_SIZE 4 * KiB + +#define BLOCK_ALIGN BLOCK_SIZE + +void physical_mm_init(void); + +#endif -- cgit v1.2.3