block_layer.c File Reference

#include <miniOS/io.h>
#include <miniOS/drivers/block_layer.h>
#include <miniOS/drivers/ata.h>
#include <miniOS/mm/pmm.h>
#include <miniOS/mm/vmm.h>
#include <miniOS/mm/heap.h>
#include <miniOS/arch/x86_64/spinlock.h>
#include <string.h>

Include dependency graph for block_layer.c:

Classes
struct	cache_entry_t
struct	block_cache_t

Macros
#define	BLOCK_SIZE   512
#define	CACHE_SIZE_BLOCKS   64

Functions
static cache_entry_t *	block_cache_lookup_locked (uint64_t lba)
static cache_entry_t *	block_cache_evict_locked (void)
void	block_layer_init (void)
	Called once during kernel startup to allocate memory for the cache and prepare the block layer for use.
int	block_read (uint64_t lba, uint16_t count, void *buf)
	Reads count blocks starting at lba into buf. If count is 1, this operation will be serviced by the cache. Multi-block reads currently bypass the cache and read directly from the disk.
int	block_write (uint64_t lba, uint16_t count, const void *buf)
	Writes count blocks starting at lba. This is a write-through operation. The data is written to the underlying disk, and if a cached copy of the block exists, it is updated.

Variables
static block_cache_t	g_block_cache
static spinlock_t	g_cache_lock

Macro Definition Documentation

BLOCK_SIZE

#define BLOCK_SIZE   512

CACHE_SIZE_BLOCKS

#define CACHE_SIZE_BLOCKS   64

Function Documentation

block_cache_evict_locked()

cache_entry_t * block_cache_evict_locked ( void )

static

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block_cache_lookup_locked()

cache_entry_t * block_cache_lookup_locked ( uint64_t lba )

static

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Variable Documentation

g_block_cache

block_cache_t g_block_cache

static

g_cache_lock

spinlock_t g_cache_lock

static