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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2019 Joyent, Inc.
*/
#ifndef _GIPT_H_
#define _GIPT_H_
#include <sys/types.h>
#include <sys/mutex.h>
#include <sys/param.h>
#include <sys/list.h>
struct gipt {
list_node_t gipt_node;
uint64_t gipt_vaddr;
uint64_t gipt_pfn;
uint16_t gipt_level;
uint16_t gipt_valid_cnt;
uint32_t _gipt_pad;
struct gipt *gipt_parent;
uint64_t *gipt_kva;
uint64_t _gipt_pad2;
};
typedef struct gipt gipt_t;
typedef enum {
PTET_EMPTY = 0,
PTET_PAGE = 1,
PTET_LINK = 2,
} gipt_pte_type_t;
/* Given a PTE and its level, determine the type of that PTE */
typedef gipt_pte_type_t (*gipt_pte_type_cb_t)(uint64_t, uint_t);
/* Given the PFN of a child table, emit a PTE that references it */
typedef uint64_t (*gipt_pte_map_cb_t)(uint64_t);
struct gipt_cbs {
gipt_pte_type_cb_t giptc_pte_type;
gipt_pte_map_cb_t giptc_pte_map;
};
struct gipt_map {
kmutex_t giptm_lock;
gipt_t *giptm_root;
list_t *giptm_hash;
struct gipt_cbs giptm_cbs;
size_t giptm_table_cnt;
uint_t giptm_levels;
};
typedef struct gipt_map gipt_map_t;
#define GIPT_HASH_SIZE_DEFAULT 0x2000
#define GIPT_MAX_LEVELS 4
#define GIPT_VA2IDX(pt, va) \
(((va) - (pt)->gipt_vaddr) >> \
gipt_level_shift[(pt)->gipt_level])
#define GIPT_VA2PTE(pt, va) ((pt)->gipt_kva[GIPT_VA2IDX(pt, va)])
#define GIPT_VA2PTEP(pt, va) (&(pt)->gipt_kva[GIPT_VA2IDX(pt, va)])
extern const uint_t gipt_level_shift[GIPT_MAX_LEVELS+1];
extern const uint64_t gipt_level_mask[GIPT_MAX_LEVELS+1];
extern const uint64_t gipt_level_size[GIPT_MAX_LEVELS+1];
extern const uint64_t gipt_level_count[GIPT_MAX_LEVELS+1];
extern gipt_t *gipt_alloc(void);
extern void gipt_free(gipt_t *);
extern void gipt_map_init(gipt_map_t *, uint_t, uint_t,
const struct gipt_cbs *, gipt_t *);
extern void gipt_map_fini(gipt_map_t *);
extern gipt_t *gipt_map_lookup(gipt_map_t *, uint64_t, uint_t);
extern gipt_t *gipt_map_lookup_deepest(gipt_map_t *, uint64_t);
extern uint64_t gipt_map_next_page(gipt_map_t *, uint64_t, uint64_t,
gipt_t **);
extern void gipt_map_insert(gipt_map_t *, gipt_t *);
extern void gipt_map_remove(gipt_map_t *, gipt_t *);
extern gipt_t *gipt_map_create_parents(gipt_map_t *, uint64_t, uint_t);
extern void gipt_map_clean_parents(gipt_map_t *, gipt_t *);
#endif /* _GIPT_H_ */
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