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/*
* Copyright (c) 2016, Linaro Limited
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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 <kernel/tee_ta_manager.h>
#include <sys/queue.h>
#include <types_ext.h>
#include <util.h>
struct pgt {
void *tbl;
#if defined(CFG_PAGED_USER_TA)
vaddr_t vabase;
struct tee_ta_ctx *ctx;
size_t num_used_entries;
#endif
#if defined(CFG_WITH_PAGER)
#if !defined(CFG_WITH_LPAE)
struct pgt_parent *parent;
#endif
#endif
#ifdef CFG_SMALL_PAGE_USER_TA
SLIST_ENTRY(pgt) link;
#endif
};
#ifdef CFG_SMALL_PAGE_USER_TA
/*
* Reserve 2 page tables per thread, but at least 4 page tables in total
*/
#if CFG_NUM_THREADS < 2
#define PGT_CACHE_SIZE 4
#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, void *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, void *ctx,
vaddr_t begin, vaddr_t last);
#else
static inline void pgt_flush_ctx_range(struct pgt_cache *pgt_cache __unused,
void *ctx __unused,
vaddr_t begin __unused,
vaddr_t last __unused)
{
}
#endif
void pgt_transfer(struct pgt_cache *pgt_cache, void *old_ctx, vaddr_t old_va,
void *new_ctx, vaddr_t new_va, size_t size);
void pgt_init(void);
#else
static inline void pgt_init(void)
{
}
#endif
#if defined(CFG_PAGED_USER_TA)
void pgt_flush_ctx(struct tee_ta_ctx *ctx);
static inline void pgt_inc_used_entries(struct pgt *pgt)
{
pgt->num_used_entries++;
}
static inline void pgt_dec_used_entries(struct pgt *pgt)
{
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 tee_ta_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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