qemu_common.c

/*
 * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <platform_def.h>

#include <arch_helpers.h>
#include <common/bl_common.h>
#include <lib/xlat_tables/xlat_tables_v2.h>

#include "qemu_private.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)

#define MAP_FLASH1	MAP_REGION_FLAT(QEMU_FLASH1_BASE, QEMU_FLASH1_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_FLASH1,
	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_FLASH1,
	MAP_SHARED_RAM,
	MAP_DEVICE0,
#ifdef MAP_DEVICE1
	MAP_DEVICE1,
#endif
#ifdef MAP_DEVICE2
	MAP_DEVICE2,
#endif
	MAP_NS_DRAM0,
#if SPM_MM
	QEMU_SP_IMAGE_MMAP,
#else
	MAP_BL32_MEM,
#endif
	{0}
};
#endif
#ifdef IMAGE_BL31
static const mmap_region_t plat_qemu_mmap[] = {
	MAP_SHARED_RAM,
	MAP_DEVICE0,
#ifdef MAP_DEVICE1
	MAP_DEVICE1,
#endif
#if SPM_MM
	QEMU_SPM_BUF_EL3_MMAP,
#else
	MAP_BL32_MEM,
#endif
	{0}
};
#endif
#ifdef IMAGE_BL32
static const mmap_region_t plat_qemu_mmap[] = {
	MAP_SHARED_RAM,
	MAP_DEVICE0,
#ifdef MAP_DEVICE1
	MAP_DEVICE1,
#endif
	{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(unsigned long total_base,	\
				   unsigned long total_size,		\
				   unsigned long code_start,		\
				   unsigned long code_limit,		\
				   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(code_start, code_start,			\
				code_limit - code_start,		\
				MT_CODE | MT_SECURE);			\
		mmap_add_region(ro_start, ro_start,			\
				ro_limit - ro_start,			\
				MT_RO_DATA | 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(0);					\
	}

/* Define EL1 and EL3 variants of the function initialising the MMU */
#ifdef __aarch64__
DEFINE_CONFIGURE_MMU_EL(el1)
DEFINE_CONFIGURE_MMU_EL(el3)
#else
DEFINE_CONFIGURE_MMU_EL(svc_mon)
#endif