Merge pull request #10558 from iNavFlight/MrD_Correct-comments-on-OSD-symbols
[inav.git] / src / main / drivers / memprot_stm32h7xx.c
bloba549d493d3b792e15bc649e12c40a61063ced4e2
1 /*
2 * This file is part of Cleanflight and Betaflight.
4 * Cleanflight and Betaflight are free software. You can redistribute
5 * this software and/or modify this software under the terms of the
6 * GNU General Public License as published by the Free Software
7 * Foundation, either version 3 of the License, or (at your option)
8 * any later version.
10 * Cleanflight and Betaflight are distributed in the hope that they
11 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
12 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this software.
18 * If not, see <http://www.gnu.org/licenses/>.
21 #include "platform.h"
23 #include "common/utils.h"
25 #include "memprot.h"
27 // Defined in linker script
28 extern uint8_t dmaram_start;
29 extern uint8_t dmaram_end;
31 extern uint8_t dmarwaxi_start;
32 extern uint8_t dmarwaxi_end;
34 mpuRegion_t mpuRegions[] = {
35 #ifdef USE_ITCM_RAM
37 // Mark ITCM-RAM as read-only
38 // "For Cortex®-M7, TCMs memories always behave as Non-cacheable, Non-shared normal memories, irrespective of the memory type attributes defined in the MPU for a memory region containing addresses held in the TCM"
39 // See AN4838
40 .start = 0x00000000,
41 .end = 0, // Size defined by "size"
42 .size = MPU_REGION_SIZE_64KB,
43 .perm = MPU_REGION_PRIV_RO_URO,
44 .exec = MPU_INSTRUCTION_ACCESS_ENABLE,
45 .shareable = MPU_ACCESS_NOT_SHAREABLE,
46 .cacheable = MPU_ACCESS_NOT_CACHEABLE,
47 .bufferable = MPU_ACCESS_BUFFERABLE,
49 #endif
51 // DMA transmit buffer in D2 SRAM1
52 // Reading needs cache coherence operation
53 .start = (uint32_t)&dmaram_start,
54 .end = (uint32_t)&dmaram_end,
55 .size = 0, // Size determined by ".end"
56 .perm = MPU_REGION_FULL_ACCESS,
57 .exec = MPU_INSTRUCTION_ACCESS_ENABLE,
58 .shareable = MPU_ACCESS_SHAREABLE,
59 .cacheable = MPU_ACCESS_CACHEABLE,
60 .bufferable = MPU_ACCESS_NOT_BUFFERABLE,
62 #ifdef USE_SDCARD_SDIO
64 // A region in AXI RAM accessible from SDIO internal DMA
65 .start = (uint32_t)&dmarwaxi_start,
66 .end = (uint32_t)&dmarwaxi_end,
67 .size = 0, // Size determined by ".end"
68 .perm = MPU_REGION_FULL_ACCESS,
69 .exec = MPU_INSTRUCTION_ACCESS_ENABLE,
70 .shareable = MPU_ACCESS_NOT_SHAREABLE,
71 .cacheable = MPU_ACCESS_CACHEABLE,
72 .bufferable = MPU_ACCESS_NOT_BUFFERABLE,
74 #endif
77 unsigned mpuRegionCount = ARRAYLEN(mpuRegions);
79 STATIC_ASSERT(ARRAYLEN(mpuRegions) <= MAX_MPU_REGIONS, MPU_region_count_exceeds_limit);