80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/*
|
||
StarForth — Steady-State Virtual Machine Runtime
|
||
|
||
Copyright (c) 2023–2025 Robert A. James
|
||
All rights reserved.
|
||
|
||
This file is part of the StarForth project.
|
||
|
||
Licensed under the StarForth License, Version 1.0 (the "License");
|
||
you may not use this file except in compliance with the License.
|
||
|
||
You may obtain a copy of the License at:
|
||
https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
|
||
|
||
This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
express or implied, including but not limited to the warranties of
|
||
merchantability, fitness for a particular purpose, and noninfringement.
|
||
|
||
See the License for the specific language governing permissions and
|
||
limitations under the License.
|
||
|
||
StarForth — Steady-State Virtual Machine Runtime
|
||
Copyright (c) 2023–2025 Robert A. James
|
||
All rights reserved.
|
||
|
||
This file is part of the StarForth project.
|
||
|
||
Licensed under the StarForth License, Version 1.0 (the "License");
|
||
you may not use this file except in compliance with the License.
|
||
|
||
You may obtain a copy of the License at:
|
||
https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
|
||
|
||
This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
express or implied, including but not limited to the warranties of
|
||
merchantability, fitness for a particular purpose, and noninfringement.
|
||
|
||
See the License for the specific language governing permissions and
|
||
limitations under the License.
|
||
|
||
*/
|
||
|
||
/**
|
||
* pmm.h - Physical Memory Manager interface for StarKernel
|
||
*
|
||
* Bitmap-based allocator for 4KB physical pages. Initialization parses the
|
||
* UEFI memory map provided in BootInfo and exposes simple allocation and
|
||
* statistics helpers for early kernel bring-up.
|
||
*/
|
||
|
||
#ifndef STARKERNEL_PMM_H
|
||
#define STARKERNEL_PMM_H
|
||
|
||
#include <stdint.h>
|
||
#include <stddef.h>
|
||
#include "uefi.h"
|
||
|
||
#define PMM_PAGE_SIZE 4096u
|
||
|
||
typedef struct {
|
||
uint64_t total_pages;
|
||
uint64_t used_pages;
|
||
uint64_t free_pages;
|
||
uint64_t total_bytes;
|
||
uint64_t used_bytes;
|
||
uint64_t free_bytes;
|
||
} pmm_stats_t;
|
||
|
||
int pmm_init(BootInfo *boot_info);
|
||
int pmm_is_initialized(void);
|
||
|
||
uint64_t pmm_alloc_page(void);
|
||
uint64_t pmm_alloc_contiguous(uint64_t num_pages);
|
||
void pmm_free_page(uint64_t paddr);
|
||
void pmm_free_contiguous(uint64_t paddr, uint64_t num_pages);
|
||
|
||
pmm_stats_t pmm_get_stats(void);
|
||
|
||
#endif /* STARKERNEL_PMM_H */
|