2 * This confidential and proprietary software may be used only as
3 * authorised by a licensing agreement from ARM Limited
4 * (C) COPYRIGHT 2011-2013 ARM Limited
6 * The entire notice above must be reproduced on all authorised
7 * copies and copies may only be made to the extent permitted
8 * by a licensing agreement from ARM Limited.
11 #include "mali_mem_validation.h"
13 #include "mali_kernel_common.h"
15 //#include "mali_platform.h"
18 #define MALI_INVALID_MEM_ADDR 0xFFFFFFFF
21 u32 phys_base; /**< Mali physical base of the memory, page aligned */
22 u32 size; /**< size in bytes of the memory, multiple of page size */
23 } _mali_mem_validation_t;
25 static _mali_mem_validation_t mali_mem_validator = { MALI_INVALID_MEM_ADDR, MALI_INVALID_MEM_ADDR };
27 extern struct fb_info *rk_get_fb(int fb_id);
28 _mali_osk_errcode_t mali_mem_validation_add_range(u32 start, u32 size_para)
30 /* Check that no other MEM_VALIDATION resources exist */
31 struct fb_info *fb = rk_get_fb(0);
32 u32 base = (fb->fix).smem_start;
33 u32 size = (fb->fix).smem_len;
34 if (MALI_INVALID_MEM_ADDR != mali_mem_validator.phys_base) {
35 MALI_PRINT_ERROR(("Failed to add frame buffer memory; another range is already specified\n"));
36 return _MALI_OSK_ERR_FAULT;
39 /* Check restrictions on page alignment */
40 if ((0 != (base & (~_MALI_OSK_CPU_PAGE_MASK))) ||
41 (0 != (size & (~_MALI_OSK_CPU_PAGE_MASK)))) {
42 MALI_PRINT_ERROR(("Failed to add frame buffer memory; incorrect alignment\n"));
43 return _MALI_OSK_ERR_FAULT;
46 mali_mem_validator.phys_base = base;
47 mali_mem_validator.size = size;
48 MALI_DEBUG_PRINT(2, ("Memory Validator installed for Mali physical address base=0x%08X, size=0x%08X\n",
49 mali_mem_validator.phys_base, mali_mem_validator.size));
51 return _MALI_OSK_ERR_OK;
54 _mali_osk_errcode_t mali_mem_validation_check(u32 phys_addr, u32 size)
57 if (phys_addr < (phys_addr + size)) { /* Don't allow overflow (or zero size) */
58 if ((0 == ( phys_addr & (~_MALI_OSK_CPU_PAGE_MASK))) &&
59 (0 == ( size & (~_MALI_OSK_CPU_PAGE_MASK)))) {
60 if ((phys_addr >= mali_mem_validator.phys_base) &&
61 ((phys_addr + (size - 1)) >= mali_mem_validator.phys_base) &&
62 (phys_addr <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) &&
63 ((phys_addr + (size - 1)) <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) ) {
64 MALI_DEBUG_PRINT(3, ("Accepted range 0x%08X + size 0x%08X (= 0x%08X)\n", phys_addr, size, (phys_addr + size - 1)));
65 return _MALI_OSK_ERR_OK;
70 MALI_PRINT_ERROR(("MALI PHYSICAL RANGE VALIDATION ERROR: The range supplied was: phys_base=0x%08X, size=0x%08X\n", phys_addr, size));
72 return _MALI_OSK_ERR_FAULT;
74 MALI_PRINT(("abort mali mem validation check needed by little Q \r\n"));
75 return _MALI_OSK_ERR_OK;