blob: 92078525646211b95f3aac0f95f6ea684af166fe [file] [log] [blame]
/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __XLAT_TABLES_PRIVATE_H__
#define __XLAT_TABLES_PRIVATE_H__
#include <cassert.h>
#include <platform_def.h>
#include <utils_def.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);
/*
* In AArch32 state, the MMU only supports 4KB page granularity, which means
* that the first translation table level is either 1 or 2. Both of them are
* allowed to have block and table descriptors. See section G4.5.6 of the
* ARMv8-A Architecture Reference Manual (DDI 0487A.k) for more information.
*
* In AArch64 state, the MMU may support 4 KB, 16 KB and 64 KB page
* granularity. For 4KB granularity, a level 0 table descriptor doesn't support
* block translation. For 16KB, the same thing happens to levels 0 and 1. For
* 64KB, same for level 1. See section D4.3.1 of the ARMv8-A Architecture
* Reference Manual (DDI 0487A.k) for more information.
*
* The define below specifies the first table level that allows block
* descriptors.
*/
#ifdef AARCH32
# define XLAT_BLOCK_LEVEL_MIN 1
#else /* if AArch64 */
# if PAGE_SIZE == (4*1024) /* 4KB */
# define XLAT_BLOCK_LEVEL_MIN 1
# else /* 16KB or 64KB */
# define XLAT_BLOCK_LEVEL_MIN 2
# endif
#endif /* AARCH32 */
void print_mmap(void);
/* Returns the current Exception Level. The returned EL must be 1 or higher. */
int xlat_arch_current_el(void);
/*
* Returns the bit mask that has to be ORed to the rest of a translation table
* descriptor so that execution of code is prohibited at the given Exception
* Level.
*/
uint64_t xlat_arch_get_xn_desc(int el);
void init_xlation_table(uintptr_t base_va, uint64_t *table,
int level, uintptr_t *max_va,
unsigned long long *max_pa);
#endif /* __XLAT_TABLES_PRIVATE_H__ */