/*
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* Copyright (C) 2011-2014, 2016-2017 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained from Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "mali_mem_validation.h"
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#include "mali_osk.h"
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#include "mali_kernel_common.h"
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#define MALI_INVALID_MEM_ADDR 0xFFFFFFFF
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typedef struct {
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u32 phys_base; /**< Mali physical base of the memory, page aligned */
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u32 size; /**< size in bytes of the memory, multiple of page size */
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} _mali_mem_validation_t;
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static _mali_mem_validation_t mali_mem_validator = { MALI_INVALID_MEM_ADDR, MALI_INVALID_MEM_ADDR };
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_mali_osk_errcode_t mali_mem_validation_add_range(u32 start, u32 size)
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{
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/* Check that no other MEM_VALIDATION resources exist */
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if (MALI_INVALID_MEM_ADDR != mali_mem_validator.phys_base) {
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MALI_PRINT_ERROR(("Failed to add frame buffer memory; another range is already specified\n"));
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return _MALI_OSK_ERR_FAULT;
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}
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/* Check restrictions on page alignment */
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if ((0 != (start & (~_MALI_OSK_CPU_PAGE_MASK))) ||
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(0 != (size & (~_MALI_OSK_CPU_PAGE_MASK)))) {
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MALI_PRINT_ERROR(("Failed to add frame buffer memory; incorrect alignment\n"));
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return _MALI_OSK_ERR_FAULT;
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}
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mali_mem_validator.phys_base = start;
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mali_mem_validator.size = size;
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MALI_DEBUG_PRINT(2, ("Memory Validator installed for Mali physical address base=0x%08X, size=0x%08X\n",
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mali_mem_validator.phys_base, mali_mem_validator.size));
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return _MALI_OSK_ERR_OK;
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}
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_mali_osk_errcode_t mali_mem_validation_check(u32 phys_addr, u32 size)
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{
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#if 0
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if (phys_addr < (phys_addr + size)) { /* Don't allow overflow (or zero size) */
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if ((0 == (phys_addr & (~_MALI_OSK_CPU_PAGE_MASK))) &&
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(0 == (size & (~_MALI_OSK_CPU_PAGE_MASK)))) {
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if ((phys_addr >= mali_mem_validator.phys_base) &&
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((phys_addr + (size - 1)) >= mali_mem_validator.phys_base) &&
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(phys_addr <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) &&
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((phys_addr + (size - 1)) <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1)))) {
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MALI_DEBUG_PRINT(3, ("Accepted range 0x%08X + size 0x%08X (= 0x%08X)\n", phys_addr, size, (phys_addr + size - 1)));
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return _MALI_OSK_ERR_OK;
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}
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}
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}
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MALI_PRINT_ERROR(("MALI PHYSICAL RANGE VALIDATION ERROR: The range supplied was: phys_base=0x%08X, size=0x%08X\n", phys_addr, size));
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return _MALI_OSK_ERR_FAULT;
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#endif
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return _MALI_OSK_ERR_OK;
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}
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