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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2016, Linaro Limited
*/
#ifndef MM_PGT_CACHE_H
#define MM_PGT_CACHE_H
#ifdef CFG_WITH_LPAE
#define PGT_SIZE (4 * 1024)
#define PGT_NUM_PGT_PER_PAGE 1
#else
#define PGT_SIZE (1 * 1024)
#define PGT_NUM_PGT_PER_PAGE 4
#endif
#include <assert.h>
#include <kernel/tee_ta_manager.h>
#include <sys/queue.h>
#include <types_ext.h>
#include <util.h>
struct ts_ctx;
struct pgt {
void *tbl;
#if defined(CFG_PAGED_USER_TA)
vaddr_t vabase;
struct ts_ctx *ctx;
size_t num_used_entries;
#endif
#if defined(CFG_WITH_PAGER)
#if !defined(CFG_WITH_LPAE)
struct pgt_parent *parent;
#endif
#endif
SLIST_ENTRY(pgt) link;
};
/*
* A proper value for PGT_CACHE_SIZE depends on many factors: CFG_WITH_LPAE,
* CFG_TA_ASLR, size of TA, size of memrefs passed to TA, CFG_ULIBS_SHARED and
* possibly others. The value is based on the number of threads as an indicator
* on how large the system might be.
*/
#if CFG_NUM_THREADS < 2
#define PGT_CACHE_SIZE 4
#elif (CFG_NUM_THREADS == 2 && !defined(CFG_WITH_LPAE))
#define PGT_CACHE_SIZE 8
#else
#define PGT_CACHE_SIZE ROUNDUP(CFG_NUM_THREADS * 2, PGT_NUM_PGT_PER_PAGE)
#endif
SLIST_HEAD(pgt_cache, pgt);
static inline bool pgt_check_avail(size_t num_tbls)
{
return num_tbls <= PGT_CACHE_SIZE;
}
void pgt_alloc(struct pgt_cache *pgt_cache, struct ts_ctx *owning_ctx,
vaddr_t begin, vaddr_t last);
void pgt_free(struct pgt_cache *pgt_cache, bool save_ctx);
#ifdef CFG_PAGED_USER_TA
void pgt_flush_ctx_range(struct pgt_cache *pgt_cache, struct ts_ctx *ctx,
vaddr_t begin, vaddr_t last);
#else
static inline void pgt_flush_ctx_range(struct pgt_cache *pgt_cache __unused,
struct ts_ctx *ctx __unused,
vaddr_t begin __unused,
vaddr_t last __unused)
{
}
#endif
void pgt_init(void);
#if defined(CFG_PAGED_USER_TA)
void pgt_flush_ctx(struct ts_ctx *ctx);
static inline void pgt_inc_used_entries(struct pgt *pgt)
{
pgt->num_used_entries++;
assert(pgt->num_used_entries);
}
static inline void pgt_dec_used_entries(struct pgt *pgt)
{
assert(pgt->num_used_entries);
pgt->num_used_entries--;
}
static inline void pgt_set_used_entries(struct pgt *pgt, size_t val)
{
pgt->num_used_entries = val;
}
#else
static inline void pgt_flush_ctx(struct ts_ctx *ctx __unused)
{
}
static inline void pgt_inc_used_entries(struct pgt *pgt __unused)
{
}
static inline void pgt_dec_used_entries(struct pgt *pgt __unused)
{
}
static inline void pgt_set_used_entries(struct pgt *pgt __unused,
size_t val __unused)
{
}
#endif
#endif /*MM_PGT_CACHE_H*/
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