mm.h File Reference

(29312b1 fbconsole, panic: render panic after framebuffer was given to userspace - without clearing screen contents)

#include <stdint.h>

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Macros
#define	KiB   (1024)
#define	MiB   (1024ULL * KiB)
#define	GiB   (1024ULL * MiB)
#define	TiB   (1024ULL * GiB)

Enumerations
enum	mm_page_status_t { MM_UNKNOWN , MM_FREE , MM_RESERVED , MM_UEFI_MAPPING_REQUIRED }
enum	mm_caching_mode_t { MM_UNCACHED , MM_WRITETHROUGH , MM_WRITEBACK }

Functions
void *	mm_alloc_pages (uint64_t count)
void	mm_set_caching_mode (mm_caching_mode_t mode, ptr_t start, size_t len)
void	mm_mark_physical_pages (ptr_t start, uint64_t count, mm_page_status_t status)
void	mm_make_writeable (ptr_t address, int writeable)
void	mm_print_physical_free_regions (void)
void	mm_bootstrap (ptr_t usable_page)
ptr_t	mm_highest_address (void)

Macro Definition Documentation

GiB

#define GiB   (1024ULL * MiB)

Definition at line 8 of file mm.h.

KiB

#define KiB   (1024)

Definition at line 6 of file mm.h.

MiB

#define MiB   (1024ULL * KiB)

Definition at line 7 of file mm.h.

TiB

#define TiB   (1024ULL * GiB)

Definition at line 9 of file mm.h.

Enumeration Type Documentation

mm_caching_mode_t

enum mm_caching_mode_t

Enumerator
MM_UNCACHED
MM_WRITETHROUGH
MM_WRITEBACK

Definition at line 18 of file mm.h.

mm_page_status_t

enum mm_page_status_t

Enumerator
MM_UNKNOWN
MM_FREE
MM_RESERVED
MM_UEFI_MAPPING_REQUIRED

Definition at line 11 of file mm.h.

Function Documentation

mm_alloc_pages()

void * mm_alloc_pages

(

uint64_t

count

)

Definition at line 24 of file mm.c.

References mm_page_list_entry_t::count, mm_del_page_list_entry(), MM_FREE, mm_physical_page_list, mm_page_list_entry_t::next, panic_message(), mm_page_list_entry_t::start, and mm_page_list_entry_t::status.

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mm_bootstrap()

void mm_bootstrap

(

ptr_t

usable_page

)

Definition at line 76 of file mm.c.

References mm_page_list_entry_t::count, mm_physical_page_list, MM_UNKNOWN, mm_page_list_entry_t::next, mm_page_list_entry_t::start, and mm_page_list_entry_t::status.

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mm_highest_address()

ptr_t mm_highest_address

(

void

)

Definition at line 166 of file mm.c.

References mm_page_list_entry_t::count, mm_physical_page_list, mm_page_list_entry_t::next, and mm_page_list_entry_t::start.

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mm_make_writeable()

void mm_make_writeable	(	ptr_t	address,
		int	writeable
	)

Make page writeable

Parameters

address	Address to modify
writeable	Shall the page be writeable or readonly?

mm_mark_physical_pages()

void mm_mark_physical_pages	(	ptr_t	start,
		uint64_t	count,
		mm_page_status_t	status
	)

Mark physical pages with information from loader memory map

Parameters

start	Start of the physical memory region to mark
count	Number of pages
status	Page status of the given memory region

Definition at line 93 of file mm.c.

References mm_page_list_entry_t::count, entry, mm_bootstrap(), mm_del_page_list_entry(), MM_FREE, mm_get_page_list_entry(), mm_physical_page_list, mm_page_list_entry_t::next, panic_message(), mm_page_list_entry_t::start, and mm_page_list_entry_t::status.

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mm_print_physical_free_regions()

void mm_print_physical_free_regions

(

void

)

Definition at line 154 of file mm.c.

References mm_page_list_entry_t::count, logd, MM_FREE, mm_physical_page_list, mm_page_list_entry_t::next, mm_page_list_entry_t::start, and mm_page_list_entry_t::status.

mm_set_caching_mode()

void mm_set_caching_mode	(	mm_caching_mode_t	mode,
		ptr_t	start,
		size_t	len
	)

set the caching mode for the pages starting at start until start + len

Parameters

mode	caching mode to set
start	start address
len	number of bytes