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/*
* Copyright (C) 2011-2012 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained from Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "mali_mem_validation.h"
#include "mali_osk.h"
#include "mali_kernel_common.h"
#define MALI_INVALID_MEM_ADDR 0xFFFFFFFF
typedef struct
{
u32 phys_base; /**< Mali physical base of the memory, page aligned */
u32 size; /**< size in bytes of the memory, multiple of page size */
} _mali_mem_validation_t;
static _mali_mem_validation_t mali_mem_validator = { MALI_INVALID_MEM_ADDR, MALI_INVALID_MEM_ADDR };
_mali_osk_errcode_t mali_mem_validation_add_range(const _mali_osk_resource_t *resource)
{
/* Check that no other MEM_VALIDATION resources exist */
if (MALI_INVALID_MEM_ADDR != mali_mem_validator.phys_base)
{
MALI_PRINT_ERROR(("Failed to add MEM_VALIDATION resource %s; another range is already specified\n", resource->description));
return _MALI_OSK_ERR_FAULT;
}
/* Check restrictions on page alignment */
if ((0 != (resource->base & (~_MALI_OSK_CPU_PAGE_MASK))) ||
(0 != (resource->size & (~_MALI_OSK_CPU_PAGE_MASK))))
{
MALI_PRINT_ERROR(("Failed to add MEM_VALIDATION resource %s; incorrect alignment\n", resource->description));
return _MALI_OSK_ERR_FAULT;
}
mali_mem_validator.phys_base = resource->base;
mali_mem_validator.size = resource->size;
MALI_DEBUG_PRINT(2, ("Memory Validator '%s' installed for Mali physical address base=0x%08X, size=0x%08X\n",
resource->description, mali_mem_validator.phys_base, mali_mem_validator.size));
return _MALI_OSK_ERR_OK;
}
_mali_osk_errcode_t mali_mem_validation_check(u32 phys_addr, u32 size)
{
if (phys_addr < (phys_addr + size)) /* Don't allow overflow (or zero size) */
{
if ((0 == ( phys_addr & (~_MALI_OSK_CPU_PAGE_MASK))) &&
(0 == ( size & (~_MALI_OSK_CPU_PAGE_MASK))))
{
if ((phys_addr >= mali_mem_validator.phys_base) &&
((phys_addr + (size - 1)) >= mali_mem_validator.phys_base) &&
(phys_addr <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) &&
((phys_addr + (size - 1)) <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) )
{
MALI_DEBUG_PRINT(3, ("Accepted range 0x%08X + size 0x%08X (= 0x%08X)\n", phys_addr, size, (phys_addr + size - 1)));
return _MALI_OSK_ERR_OK;
}
}
}
MALI_PRINT_ERROR(("MALI PHYSICAL RANGE VALIDATION ERROR: The range supplied was: phys_base=0x%08X, size=0x%08X\n", phys_addr, size));
return _MALI_OSK_ERR_FAULT;
}
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