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Diffstat (limited to 'include/lib/aarch64/xlat_tables.h')
-rw-r--r-- | include/lib/aarch64/xlat_tables.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/lib/aarch64/xlat_tables.h b/include/lib/aarch64/xlat_tables.h new file mode 100644 index 0000000..5df655b --- /dev/null +++ b/include/lib/aarch64/xlat_tables.h @@ -0,0 +1,72 @@ +/* + * Copyright (c) 2014, 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_H__ +#define __XLAT_TABLES_H__ + +#include <stdint.h> + +/* + * Flags for building up memory mapping attributes. + * These are organised so that a clear bit gives a more restrictive mapping + * that a set bit, that way a bitwise-and two sets of attributes will never give + * an attribute which has greater access rights that any of the original + * attributes. + */ +typedef enum { + MT_DEVICE = 0 << 0, + MT_MEMORY = 1 << 0, + + MT_RO = 0 << 1, + MT_RW = 1 << 1, + + MT_SECURE = 0 << 2, + MT_NS = 1 << 2 +} mmap_attr_t; + +/* + * Structure for specifying a single region of memory. + */ +typedef struct mmap_region { + unsigned long base; + unsigned long size; + mmap_attr_t attr; +} mmap_region_t; + +void mmap_add_region(unsigned long base, unsigned long size, + unsigned attr); +void mmap_add(const mmap_region_t *mm); + +void init_xlat_tables(void); + +void enable_mmu_el1(void); +void enable_mmu_el3(void); + +#endif /* __XLAT_TABLES_H__ */ |