2017-03-08 14:40:23 +00:00
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/*
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* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __XLAT_TABLES_PRIVATE_H__
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#define __XLAT_TABLES_PRIVATE_H__
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#include <cassert.h>
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#include <platform_def.h>
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#include <utils.h>
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/*
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* If the platform hasn't defined a physical and a virtual address space size
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* default to ADDR_SPACE_SIZE.
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*/
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#if ERROR_DEPRECATED
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# ifdef ADDR_SPACE_SIZE
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# error "ADDR_SPACE_SIZE is deprecated. Use PLAT_xxx_ADDR_SPACE_SIZE instead."
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# endif
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#elif defined(ADDR_SPACE_SIZE)
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# ifndef PLAT_PHY_ADDR_SPACE_SIZE
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# define PLAT_PHY_ADDR_SPACE_SIZE ADDR_SPACE_SIZE
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# endif
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# ifndef PLAT_VIRT_ADDR_SPACE_SIZE
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# define PLAT_VIRT_ADDR_SPACE_SIZE ADDR_SPACE_SIZE
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# endif
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#endif
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/* The virtual and physical address space sizes must be powers of two. */
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CASSERT(IS_POWER_OF_TWO(PLAT_VIRT_ADDR_SPACE_SIZE),
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assert_valid_virt_addr_space_size);
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CASSERT(IS_POWER_OF_TWO(PLAT_PHY_ADDR_SPACE_SIZE),
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assert_valid_phy_addr_space_size);
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/* Struct that holds all information about the translation tables. */
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typedef struct {
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/*
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* Max allowed Virtual and Physical Addresses.
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*/
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unsigned long long pa_max_address;
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uintptr_t va_max_address;
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/*
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* Array of all memory regions stored in order of ascending end address
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* and ascending size to simplify the code that allows overlapping
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* regions. The list is terminated by the first entry with size == 0.
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*/
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mmap_region_t *mmap; /* mmap_num + 1 elements */
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int mmap_num;
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/*
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* Array of finer-grain translation tables.
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* For example, if the initial lookup level is 1 then this array would
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* contain both level-2 and level-3 entries.
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*/
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uint64_t (*tables)[XLAT_TABLE_ENTRIES];
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int tables_num;
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2017-02-27 17:23:54 +00:00
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/*
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* Keep track of how many regions are mapped in each table. The base
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* table can't be unmapped so it isn't needed to keep track of it.
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*/
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#if PLAT_XLAT_TABLES_DYNAMIC
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int *tables_mapped_regions;
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#endif /* PLAT_XLAT_TABLES_DYNAMIC */
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2017-03-08 14:40:23 +00:00
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int next_table;
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/*
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* Base translation table. It doesn't need to have the same amount of
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* entries as the ones used for other levels.
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*/
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uint64_t *base_table;
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int base_table_entries;
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unsigned long long max_pa;
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uintptr_t max_va;
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/* Level of the base translation table. */
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int base_level;
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/* Set to 1 when the translation tables are initialized. */
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int initialized;
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} xlat_ctx_t;
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2017-02-27 17:23:54 +00:00
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#if PLAT_XLAT_TABLES_DYNAMIC
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/*
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* Shifts and masks to access fields of an mmap_attr_t
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*/
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/* Dynamic or static */
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#define MT_DYN_SHIFT 30 /* 31 would cause undefined behaviours */
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/*
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* Memory mapping private attributes
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*
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* Private attributes not exposed in the mmap_attr_t enum.
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*/
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typedef enum {
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/*
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* Regions mapped before the MMU can't be unmapped dynamically (they are
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* static) and regions mapped with MMU enabled can be unmapped. This
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* behaviour can't be overridden.
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*
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* Static regions can overlap each other, dynamic regions can't.
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*/
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MT_STATIC = 0 << MT_DYN_SHIFT,
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MT_DYNAMIC = 1 << MT_DYN_SHIFT
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} mmap_priv_attr_t;
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/*
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* Function used to invalidate all levels of the translation walk for a given
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* virtual address. It must be called for every translation table entry that is
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* modified.
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*/
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void xlat_arch_tlbi_va(uintptr_t va);
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/*
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* This function has to be called at the end of any code that uses the function
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* xlat_arch_tlbi_va().
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*/
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void xlat_arch_tlbi_va_sync(void);
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/* Add a dynamic region to the specified context. */
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int mmap_add_dynamic_region_ctx(xlat_ctx_t *ctx, mmap_region_t *mm);
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/* Remove a dynamic region from the specified context. */
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int mmap_remove_dynamic_region_ctx(xlat_ctx_t *ctx, uintptr_t base_va,
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size_t size);
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#endif /* PLAT_XLAT_TABLES_DYNAMIC */
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2017-03-08 14:40:23 +00:00
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/* Print VA, PA, size and attributes of all regions in the mmap array. */
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void print_mmap(mmap_region_t *const mmap);
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/*
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* Print the current state of the translation tables by reading them from
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* memory.
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*/
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void xlat_tables_print(xlat_ctx_t *ctx);
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/*
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* Initialize the translation tables by mapping all regions added to the
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* specified context.
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*/
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void init_xlation_table(xlat_ctx_t *ctx);
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/* Add a static region to the specified context. */
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void mmap_add_region_ctx(xlat_ctx_t *ctx, mmap_region_t *mm);
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/*
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* Architecture-specific initialization code.
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*/
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/* Execute architecture-specific translation table initialization code. */
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void init_xlat_tables_arch(unsigned long long max_pa);
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/* Enable MMU and configure it to use the specified translation tables. */
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void enable_mmu_arch(unsigned int flags, uint64_t *base_table);
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/* Return 1 if the MMU of this Exception Level is enabled, 0 otherwise. */
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int is_mmu_enabled(void);
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#endif /* __XLAT_TABLES_PRIVATE_H__ */
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