xlat_tables_private.h

/*
 * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 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.
 *
 * Neither the name of ARM nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * 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 __XLAT_TABLES_PRIVATE_H__
#define __XLAT_TABLES_PRIVATE_H__

#include <cassert.h>
#include <platform_def.h>
#include <utils.h>

/*
 * If the platform hasn't defined a physical and a virtual address space size
 * default to ADDR_SPACE_SIZE.
 */
#if ERROR_DEPRECATED
# ifdef ADDR_SPACE_SIZE
#  error "ADDR_SPACE_SIZE is deprecated. Use PLAT_xxx_ADDR_SPACE_SIZE instead."
# endif
#elif defined(ADDR_SPACE_SIZE)
# ifndef PLAT_PHY_ADDR_SPACE_SIZE
#  define PLAT_PHY_ADDR_SPACE_SIZE	ADDR_SPACE_SIZE
# endif
# ifndef PLAT_VIRT_ADDR_SPACE_SIZE
#  define PLAT_VIRT_ADDR_SPACE_SIZE	ADDR_SPACE_SIZE
# endif
#endif

/* The virtual and physical address space sizes must be powers of two. */
CASSERT(IS_POWER_OF_TWO(PLAT_VIRT_ADDR_SPACE_SIZE),
	assert_valid_virt_addr_space_size);
CASSERT(IS_POWER_OF_TWO(PLAT_PHY_ADDR_SPACE_SIZE),
	assert_valid_phy_addr_space_size);

/* Struct that holds all information about the translation tables. */
typedef struct {

	/*
	 * Max allowed Virtual and Physical Addresses.
	 */
	unsigned long long pa_max_address;
	uintptr_t va_max_address;

	/*
	 * Array of all memory regions stored in order of ascending end address
	 * and ascending size to simplify the code that allows overlapping
	 * regions. The list is terminated by the first entry with size == 0.
	 */
	mmap_region_t *mmap; /* mmap_num + 1 elements */
	int mmap_num;

	/*
	 * Array of finer-grain translation tables.
	 * For example, if the initial lookup level is 1 then this array would
	 * contain both level-2 and level-3 entries.
	 */
	uint64_t (*tables)[XLAT_TABLE_ENTRIES];
	int tables_num;

	int next_table;

	/*
	 * Base translation table. It doesn't need to have the same amount of
	 * entries as the ones used for other levels.
	 */
	uint64_t *base_table;
	int base_table_entries;

	unsigned long long max_pa;
	uintptr_t max_va;

	/* Level of the base translation table. */
	int base_level;

	/* Set to 1 when the translation tables are initialized. */
	int initialized;

} xlat_ctx_t;

/* Print VA, PA, size and attributes of all regions in the mmap array. */
void print_mmap(mmap_region_t *const mmap);

/*
 * Print the current state of the translation tables by reading them from
 * memory.
 */
void xlat_tables_print(xlat_ctx_t *ctx);

/*
 * Initialize the translation tables by mapping all regions added to the
 * specified context.
 */
void init_xlation_table(xlat_ctx_t *ctx);

/* Add a static region to the specified context. */
void mmap_add_region_ctx(xlat_ctx_t *ctx, mmap_region_t *mm);

/*
 * Architecture-specific initialization code.
 */

/* Execute architecture-specific translation table initialization code. */
void init_xlat_tables_arch(unsigned long long max_pa);

/* Enable MMU and configure it to use the specified translation tables. */
void enable_mmu_arch(unsigned int flags, uint64_t *base_table);

/* Return 1 if the MMU of this Exception Level is enabled, 0 otherwise. */
int is_mmu_enabled(void);

#endif /* __XLAT_TABLES_PRIVATE_H__ */