1 /*
2 * Copyright (C) 2011-2014, 2016-2017 ARM Limited. All rights reserved.
3 *
4 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
5 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
6 *
7 * A copy of the licence is included with the program, and can also be obtained from Free Software
8 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
9 */
10
11 #include "mali_mem_validation.h"
12 #include "mali_osk.h"
13 #include "mali_kernel_common.h"
14
15 #define MALI_INVALID_MEM_ADDR 0xFFFFFFFF
16
17 typedef struct {
18 u32 phys_base; /**< Mali physical base of the memory, page aligned */
19 u32 size; /**< size in bytes of the memory, multiple of page size */
20 } _mali_mem_validation_t;
21
22 static _mali_mem_validation_t mali_mem_validator = { MALI_INVALID_MEM_ADDR, MALI_INVALID_MEM_ADDR };
23
mali_mem_validation_add_range(u32 start,u32 size)24 _mali_osk_errcode_t mali_mem_validation_add_range(u32 start, u32 size)
25 {
26 /* Check that no other MEM_VALIDATION resources exist */
27 if (MALI_INVALID_MEM_ADDR != mali_mem_validator.phys_base) {
28 MALI_PRINT_ERROR(("Failed to add frame buffer memory; another range is already specified\n"));
29 return _MALI_OSK_ERR_FAULT;
30 }
31
32 /* Check restrictions on page alignment */
33 if ((0 != (start & (~_MALI_OSK_CPU_PAGE_MASK))) ||
34 (0 != (size & (~_MALI_OSK_CPU_PAGE_MASK)))) {
35 MALI_PRINT_ERROR(("Failed to add frame buffer memory; incorrect alignment\n"));
36 return _MALI_OSK_ERR_FAULT;
37 }
38
39 mali_mem_validator.phys_base = start;
40 mali_mem_validator.size = size;
41 MALI_DEBUG_PRINT(2, ("Memory Validator installed for Mali physical address base=0x%08X, size=0x%08X\n",
42 mali_mem_validator.phys_base, mali_mem_validator.size));
43
44 return _MALI_OSK_ERR_OK;
45 }
46
mali_mem_validation_check(u32 phys_addr,u32 size)47 _mali_osk_errcode_t mali_mem_validation_check(u32 phys_addr, u32 size)
48 {
49 #if 0
50 if (phys_addr < (phys_addr + size)) { /* Don't allow overflow (or zero size) */
51 if ((0 == (phys_addr & (~_MALI_OSK_CPU_PAGE_MASK))) &&
52 (0 == (size & (~_MALI_OSK_CPU_PAGE_MASK)))) {
53 if ((phys_addr >= mali_mem_validator.phys_base) &&
54 ((phys_addr + (size - 1)) >= mali_mem_validator.phys_base) &&
55 (phys_addr <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) &&
56 ((phys_addr + (size - 1)) <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1)))) {
57 MALI_DEBUG_PRINT(3, ("Accepted range 0x%08X + size 0x%08X (= 0x%08X)\n", phys_addr, size, (phys_addr + size - 1)));
58 return _MALI_OSK_ERR_OK;
59 }
60 }
61 }
62
63 MALI_PRINT_ERROR(("MALI PHYSICAL RANGE VALIDATION ERROR: The range supplied was: phys_base=0x%08X, size=0x%08X\n", phys_addr, size));
64
65 return _MALI_OSK_ERR_FAULT;
66 #endif
67 return _MALI_OSK_ERR_OK;
68 }
69