qemu_common.c

/*
 * Copyright (c) 2015-2016, 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.
 */

#include <arch_helpers.h>
#include <bl_common.h>
#include <platform_def.h>
#include "qemu_private.h"
#include <xlat_tables.h>

#define MAP_DEVICE0	MAP_REGION_FLAT(DEVICE0_BASE,			\
					DEVICE0_SIZE,			\
					MT_DEVICE | MT_RW | MT_SECURE)

#ifdef DEVICE1_BASE
#define MAP_DEVICE1	MAP_REGION_FLAT(DEVICE1_BASE,			\
					DEVICE1_SIZE,			\
					MT_DEVICE | MT_RW | MT_SECURE)
#endif

#ifdef DEVICE2_BASE
#define MAP_DEVICE2	MAP_REGION_FLAT(DEVICE2_BASE,			\
					DEVICE2_SIZE,			\
					MT_DEVICE | MT_RO | MT_SECURE)
#endif

#define MAP_SHARED_RAM	MAP_REGION_FLAT(SHARED_RAM_BASE,		\
					SHARED_RAM_SIZE,		\
					MT_DEVICE  | MT_RW | MT_SECURE)

#define MAP_BL32_MEM	MAP_REGION_FLAT(BL32_MEM_BASE, BL32_MEM_SIZE,	\
					MT_MEMORY | MT_RW | MT_SECURE)

#define MAP_NS_DRAM0	MAP_REGION_FLAT(NS_DRAM0_BASE, NS_DRAM0_SIZE,	\
					MT_MEMORY | MT_RW | MT_NS)

#define MAP_FLASH0	MAP_REGION_FLAT(QEMU_FLASH0_BASE, QEMU_FLASH0_SIZE, \
					MT_MEMORY | MT_RO | MT_SECURE)

/*
 * Table of regions for various BL stages to map using the MMU.
 * This doesn't include TZRAM as the 'mem_layout' argument passed to
 * arm_configure_mmu_elx() will give the available subset of that,
 */
#ifdef IMAGE_BL1
static const mmap_region_t plat_qemu_mmap[] = {
	MAP_FLASH0,
	MAP_SHARED_RAM,
	MAP_DEVICE0,
#ifdef MAP_DEVICE1
	MAP_DEVICE1,
#endif
#ifdef MAP_DEVICE2
	MAP_DEVICE2,
#endif
	{0}
};
#endif
#ifdef IMAGE_BL2
static const mmap_region_t plat_qemu_mmap[] = {
	MAP_FLASH0,
	MAP_SHARED_RAM,
	MAP_DEVICE0,
#ifdef MAP_DEVICE1
	MAP_DEVICE1,
#endif
#ifdef MAP_DEVICE2
	MAP_DEVICE2,
#endif
	MAP_NS_DRAM0,
	MAP_BL32_MEM,
	{0}
};
#endif
#ifdef IMAGE_BL31
static const mmap_region_t plat_qemu_mmap[] = {
	MAP_SHARED_RAM,
	MAP_DEVICE0,
#ifdef MAP_DEVICE1
	MAP_DEVICE1,
#endif
	MAP_BL32_MEM,
	{0}
};
#endif

/*******************************************************************************
 * Macro generating the code for the function setting up the pagetables as per
 * the platform memory map & initialize the mmu, for the given exception level
 ******************************************************************************/

#define DEFINE_CONFIGURE_MMU_EL(_el)					\
	void qemu_configure_mmu_el##_el(unsigned long total_base,	\
				   unsigned long total_size,		\
				   unsigned long ro_start,		\
				   unsigned long ro_limit,		\
				   unsigned long coh_start,		\
				   unsigned long coh_limit)		\
	{								\
		mmap_add_region(total_base, total_base,			\
				total_size,				\
				MT_MEMORY | MT_RW | MT_SECURE);		\
		mmap_add_region(ro_start, ro_start,			\
				ro_limit - ro_start,			\
				MT_MEMORY | MT_RO | MT_SECURE);		\
		mmap_add_region(coh_start, coh_start,			\
				coh_limit - coh_start,			\
				MT_DEVICE | MT_RW | MT_SECURE);		\
		mmap_add(plat_qemu_mmap);				\
		init_xlat_tables();					\
									\
		enable_mmu_el##_el(0);					\
	}

/* Define EL1 and EL3 variants of the function initialising the MMU */
DEFINE_CONFIGURE_MMU_EL(1)
DEFINE_CONFIGURE_MMU_EL(3)