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#ifndef CACHE_H
#define CACHE_H
#include "vt.h"
#include "misc.h"
#include "dllist.h"
#define HASH_SIZE 113
struct cache
{
struct dl_head hash[HASH_SIZE];
int erc; // error reduction circuit on
int npages;
u16 hi_subno[0x9ff + 1]; // 0:pg not in cache, 1-3f80:highest subno + 1
struct cache_ops *op;
};
struct cache_page
{
struct dl_node node[1];
struct vt_page page[1];
};
struct cache_ops
{
void (*close)(struct cache *ca);
struct vt_page *(*get)(struct cache *ca, int pgno, int subno);
struct vt_page *(*put)(struct cache *ca, struct vt_page *vtp);
void (*reset)(struct cache *ca);
struct vt_page *(*foreach_pg)(struct cache *ca, int pgno, int subno, int dir,
int (*func)(), void *data);
int (*mode)(struct cache *ca, int mode, int arg);
};
struct cache *cache_open(void);
#define CACHE_MODE_ERC 1
#endif
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