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/*
* bubbl
* Copyright (C) 2025 Raghuram Subramani <raghus2247@gmail.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#ifndef __mm_physical_mm_h
#define __mm_physical_mm_h
#include <stdbool.h>
#include <stdint.h>
#include <common.h>
/* TODO: Update this to 2MiB when PAE is enabled */
#define BLOCK_SIZE (4 * KiB)
#define BITMAP_ENTRY_SIZE 32
/* TODO: This is the maximum number of blocks for a 4GiB system. */
#define MAX_BLOCKS 1048576
void physical_mm_init(void);
uint32_t physical_mm_find_first_free_block(void);
void *physical_mm_allocate_block(void);
void physical_mm_free_block(void *physical_address);
void physical_mm_set_used(const uint32_t bit,
uint32_t *total_free_blocks,
uint32_t *memory_map);
void physical_mm_set_usable(const uint32_t bit,
uint32_t *total_free_blocks,
uint32_t *memory_map);
bool physical_mm_test_bit(const uint32_t bit, uint32_t *memory_map);
#endif
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