1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup arm_start |
---|
5 | * |
---|
6 | * @brief Arm CP15 start. |
---|
7 | */ |
---|
8 | |
---|
9 | |
---|
10 | /* |
---|
11 | * Copyright (c) 2013 Hesham AL-Matary. |
---|
12 | * Copyright (c) 2009-2019 embedded brains GmbH. All rights reserved. |
---|
13 | * |
---|
14 | * The license and distribution terms for this file may be |
---|
15 | * found in the file LICENSE in this distribution or at |
---|
16 | * http://www.rtems.org/license/LICENSE. |
---|
17 | */ |
---|
18 | |
---|
19 | #ifndef LIBBSP_ARM_SHARED_ARM_CP15_START_H |
---|
20 | #define LIBBSP_ARM_SHARED_ARM_CP15_START_H |
---|
21 | |
---|
22 | #include <libcpu/arm-cp15.h> |
---|
23 | #include <bsp/start.h> |
---|
24 | #include <bsp/linker-symbols.h> |
---|
25 | #include <bspopts.h> |
---|
26 | |
---|
27 | #ifdef __cplusplus |
---|
28 | extern "C" { |
---|
29 | #endif /* __cplusplus */ |
---|
30 | |
---|
31 | typedef struct { |
---|
32 | uint32_t begin; |
---|
33 | uint32_t end; |
---|
34 | uint32_t flags; |
---|
35 | } arm_cp15_start_section_config; |
---|
36 | |
---|
37 | #define ARMV7_CP15_START_DEFAULT_SECTIONS \ |
---|
38 | { \ |
---|
39 | .begin = (uint32_t) bsp_section_fast_text_begin, \ |
---|
40 | .end = (uint32_t) bsp_section_fast_text_end, \ |
---|
41 | .flags = ARMV7_MMU_CODE_CACHED \ |
---|
42 | }, { \ |
---|
43 | .begin = (uint32_t) bsp_section_fast_data_begin, \ |
---|
44 | .end = (uint32_t) bsp_section_fast_data_end, \ |
---|
45 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
46 | }, { \ |
---|
47 | .begin = (uint32_t) bsp_section_start_begin, \ |
---|
48 | .end = (uint32_t) bsp_section_start_end, \ |
---|
49 | .flags = ARMV7_MMU_CODE_CACHED \ |
---|
50 | }, { \ |
---|
51 | .begin = (uint32_t) bsp_section_vector_begin, \ |
---|
52 | .end = (uint32_t) bsp_section_vector_end, \ |
---|
53 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
54 | }, { \ |
---|
55 | .begin = (uint32_t) bsp_section_text_begin, \ |
---|
56 | .end = (uint32_t) bsp_section_text_end, \ |
---|
57 | .flags = ARMV7_MMU_CODE_CACHED \ |
---|
58 | }, { \ |
---|
59 | .begin = (uint32_t) bsp_section_rodata_begin, \ |
---|
60 | .end = (uint32_t) bsp_section_rodata_end, \ |
---|
61 | .flags = ARMV7_MMU_DATA_READ_ONLY_CACHED \ |
---|
62 | }, { \ |
---|
63 | .begin = (uint32_t) bsp_section_data_begin, \ |
---|
64 | .end = (uint32_t) bsp_section_data_end, \ |
---|
65 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
66 | }, { \ |
---|
67 | .begin = (uint32_t) bsp_section_bss_begin, \ |
---|
68 | .end = (uint32_t) bsp_section_bss_end, \ |
---|
69 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
70 | }, { \ |
---|
71 | .begin = (uint32_t) bsp_section_rtemsstack_begin, \ |
---|
72 | .end = (uint32_t) bsp_section_rtemsstack_end, \ |
---|
73 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
74 | }, { \ |
---|
75 | .begin = (uint32_t) bsp_section_noinit_begin, \ |
---|
76 | .end = (uint32_t) bsp_section_noinit_end, \ |
---|
77 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
78 | }, { \ |
---|
79 | .begin = (uint32_t) bsp_section_work_begin, \ |
---|
80 | .end = (uint32_t) bsp_section_work_end, \ |
---|
81 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
82 | }, { \ |
---|
83 | .begin = (uint32_t) bsp_section_stack_begin, \ |
---|
84 | .end = (uint32_t) bsp_section_stack_end, \ |
---|
85 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
86 | }, { \ |
---|
87 | .begin = (uint32_t) bsp_section_nocache_begin, \ |
---|
88 | .end = (uint32_t) bsp_section_nocache_end, \ |
---|
89 | .flags = ARMV7_MMU_DEVICE \ |
---|
90 | }, { \ |
---|
91 | .begin = (uint32_t) bsp_section_nocachenoload_begin, \ |
---|
92 | .end = (uint32_t) bsp_section_nocachenoload_end, \ |
---|
93 | .flags = ARMV7_MMU_DEVICE \ |
---|
94 | }, { \ |
---|
95 | .begin = (uint32_t) bsp_translation_table_base, \ |
---|
96 | .end = (uint32_t) bsp_translation_table_end, \ |
---|
97 | .flags = ARMV7_MMU_DATA_READ_WRITE_CACHED \ |
---|
98 | } |
---|
99 | |
---|
100 | #define ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX 10 |
---|
101 | |
---|
102 | BSP_START_DATA_SECTION extern const arm_cp15_start_section_config |
---|
103 | arm_cp15_start_mmu_config_table[]; |
---|
104 | |
---|
105 | BSP_START_DATA_SECTION extern const size_t |
---|
106 | arm_cp15_start_mmu_config_table_size; |
---|
107 | |
---|
108 | BSP_START_TEXT_SECTION static inline void |
---|
109 | arm_cp15_start_set_translation_table_entries( |
---|
110 | uint32_t *ttb, |
---|
111 | const arm_cp15_start_section_config *config |
---|
112 | ) |
---|
113 | { |
---|
114 | if (config->begin != config->end) { |
---|
115 | uint32_t i; |
---|
116 | uint32_t iend; |
---|
117 | uint32_t index_mask; |
---|
118 | uint32_t flags; |
---|
119 | #ifdef ARM_MMU_USE_SMALL_PAGES |
---|
120 | uint32_t *pt; |
---|
121 | |
---|
122 | pt = &ttb[ARM_MMU_TRANSLATION_TABLE_ENTRY_COUNT]; |
---|
123 | i = ARM_MMU_SMALL_PAGE_GET_INDEX(config->begin); |
---|
124 | iend = ARM_MMU_SMALL_PAGE_GET_INDEX(ARM_MMU_SMALL_PAGE_MVA_ALIGN_UP(config->end)); |
---|
125 | index_mask = (1U << (32 - ARM_MMU_SMALL_PAGE_BASE_SHIFT)) - 1U; |
---|
126 | flags = ARM_MMU_SECT_FLAGS_TO_SMALL_PAGE(config->flags); |
---|
127 | |
---|
128 | while (i != iend) { |
---|
129 | pt[i] = (i << ARM_MMU_SMALL_PAGE_BASE_SHIFT) | flags; |
---|
130 | i = (i + 1U) & index_mask; |
---|
131 | } |
---|
132 | #else |
---|
133 | i = ARM_MMU_SECT_GET_INDEX(config->begin); |
---|
134 | iend = ARM_MMU_SECT_GET_INDEX(ARM_MMU_SECT_MVA_ALIGN_UP(config->end)); |
---|
135 | index_mask = (1U << (32 - ARM_MMU_SECT_BASE_SHIFT)) - 1U; |
---|
136 | flags = config->flags; |
---|
137 | |
---|
138 | while (i != iend) { |
---|
139 | ttb[i] = (i << ARM_MMU_SECT_BASE_SHIFT) | flags; |
---|
140 | i = (i + 1U) & index_mask; |
---|
141 | } |
---|
142 | #endif |
---|
143 | } |
---|
144 | } |
---|
145 | |
---|
146 | BSP_START_TEXT_SECTION static inline void |
---|
147 | arm_cp15_start_setup_translation_table( |
---|
148 | uint32_t *ttb, |
---|
149 | uint32_t client_domain, |
---|
150 | const arm_cp15_start_section_config *config_table, |
---|
151 | size_t config_count |
---|
152 | ) |
---|
153 | { |
---|
154 | #ifdef ARM_MMU_USE_SMALL_PAGES |
---|
155 | uint32_t *pt; |
---|
156 | #endif |
---|
157 | uint32_t dac; |
---|
158 | size_t i; |
---|
159 | |
---|
160 | dac = ARM_CP15_DAC_DOMAIN(client_domain, ARM_CP15_DAC_CLIENT); |
---|
161 | arm_cp15_set_domain_access_control(dac); |
---|
162 | arm_cp15_set_translation_table_base(ttb); |
---|
163 | |
---|
164 | /* Initialize translation table with invalid entries */ |
---|
165 | #ifdef ARM_MMU_USE_SMALL_PAGES |
---|
166 | pt = &ttb[ARM_MMU_TRANSLATION_TABLE_ENTRY_COUNT]; |
---|
167 | for (i = 0; i < ARM_MMU_TRANSLATION_TABLE_ENTRY_COUNT; ++i) { |
---|
168 | size_t j; |
---|
169 | |
---|
170 | for (j = 0; j < ARM_MMU_SMALL_PAGE_TABLE_ENTRY_COUNT; ++j) { |
---|
171 | pt[j] = 0; |
---|
172 | } |
---|
173 | |
---|
174 | ttb[i] = (uint32_t) pt | (client_domain << ARM_MMU_SECT_DOMAIN_SHIFT) |
---|
175 | | ARM_MMU_PAGE_TABLE_DEFAULT; |
---|
176 | pt += ARM_MMU_SMALL_PAGE_TABLE_ENTRY_COUNT; |
---|
177 | } |
---|
178 | #else |
---|
179 | for (i = 0; i < ARM_MMU_TRANSLATION_TABLE_ENTRY_COUNT; ++i) { |
---|
180 | ttb[i] = 0; |
---|
181 | } |
---|
182 | #endif |
---|
183 | |
---|
184 | for (i = 0; i < config_count; ++i) { |
---|
185 | arm_cp15_start_set_translation_table_entries(ttb, &config_table [i]); |
---|
186 | } |
---|
187 | } |
---|
188 | |
---|
189 | BSP_START_TEXT_SECTION static inline void |
---|
190 | arm_cp15_start_setup_translation_table_and_enable_mmu_and_cache( |
---|
191 | uint32_t ctrl, |
---|
192 | uint32_t *ttb, |
---|
193 | uint32_t client_domain, |
---|
194 | const arm_cp15_start_section_config *config_table, |
---|
195 | size_t config_count |
---|
196 | ) |
---|
197 | { |
---|
198 | arm_cp15_start_setup_translation_table( |
---|
199 | ttb, |
---|
200 | client_domain, |
---|
201 | config_table, |
---|
202 | config_count |
---|
203 | ); |
---|
204 | |
---|
205 | /* Enable MMU and cache */ |
---|
206 | ctrl |= ARM_CP15_CTRL_I | ARM_CP15_CTRL_C | ARM_CP15_CTRL_M; |
---|
207 | |
---|
208 | arm_cp15_set_control(ctrl); |
---|
209 | } |
---|
210 | |
---|
211 | BSP_START_TEXT_SECTION static inline uint32_t |
---|
212 | arm_cp15_start_setup_mmu_and_cache(uint32_t ctrl_clear, uint32_t ctrl_set) |
---|
213 | { |
---|
214 | uint32_t ctrl = arm_cp15_get_control(); |
---|
215 | |
---|
216 | ctrl &= ~ctrl_clear; |
---|
217 | ctrl |= ctrl_set; |
---|
218 | |
---|
219 | arm_cp15_set_control(ctrl); |
---|
220 | |
---|
221 | arm_cp15_tlb_invalidate(); |
---|
222 | |
---|
223 | return ctrl; |
---|
224 | } |
---|
225 | |
---|
226 | #ifdef __cplusplus |
---|
227 | } |
---|
228 | #endif /* __cplusplus */ |
---|
229 | |
---|
230 | #endif /* LIBBSP_ARM_SHARED_ARM_CP15_START_H */ |
---|