1 files changed, 144 insertions, 0 deletions
diff --git a/core/arch/arm/include/mm/pgt_cache.h b/core/arch/arm/include/mm/pgt_cache.h
new file mode 100644
index 0000000..8812758
--- /dev/null
+++ b/core/arch/arm/include/mm/pgt_cache.h
@@ -0,0 +1,144 @@
+/*
+ * 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*/