xref: /openbmc/u-boot/arch/nds32/lib/cache.c (revision cbd2fba1) 
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2012 Andes Technology Corporation
4  * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
5  * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
6  */
7 
8 #include <common.h>
9 #if (!defined(CONFIG_SYS_ICACHE_OFF) || !defined(CONFIG_SYS_DCACHE_OFF))
10 static inline unsigned long CACHE_SET(unsigned char cache)
11 {
12 	if (cache == ICACHE)
13 		return 64 << ((GET_ICM_CFG() & ICM_CFG_MSK_ISET) \
14 			>> ICM_CFG_OFF_ISET);
15 	else
16 		return 64 << ((GET_DCM_CFG() & DCM_CFG_MSK_DSET) \
17 			>> DCM_CFG_OFF_DSET);
18 }
19 
20 static inline unsigned long CACHE_WAY(unsigned char cache)
21 {
22 	if (cache == ICACHE)
23 		return 1 + ((GET_ICM_CFG() & ICM_CFG_MSK_IWAY) \
24 			>> ICM_CFG_OFF_IWAY);
25 	else
26 		return 1 + ((GET_DCM_CFG() & DCM_CFG_MSK_DWAY) \
27 			>> DCM_CFG_OFF_DWAY);
28 }
29 
30 static inline unsigned long CACHE_LINE_SIZE(enum cache_t cache)
31 {
32 	if (cache == ICACHE)
33 		return 8 << (((GET_ICM_CFG() & ICM_CFG_MSK_ISZ) \
34 			>> ICM_CFG_OFF_ISZ) - 1);
35 	else
36 		return 8 << (((GET_DCM_CFG() & DCM_CFG_MSK_DSZ) \
37 			>> DCM_CFG_OFF_DSZ) - 1);
38 }
39 #endif
40 
41 #ifndef CONFIG_SYS_ICACHE_OFF
42 void invalidate_icache_all(void)
43 {
44 	unsigned long end, line_size;
45 	line_size = CACHE_LINE_SIZE(ICACHE);
46 	end = line_size * CACHE_WAY(ICACHE) * CACHE_SET(ICACHE);
47 	do {
48 		end -= line_size;
49 		__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL" : : "r" (end));
50 
51 		end -= line_size;
52 		__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL" : : "r" (end));
53 
54 		end -= line_size;
55 		__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL" : : "r" (end));
56 		end -= line_size;
57 		__asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL" : : "r" (end));
58 	} while (end > 0);
59 }
60 
61 void invalidate_icache_range(unsigned long start, unsigned long end)
62 {
63 	unsigned long line_size;
64 
65 	line_size = CACHE_LINE_SIZE(ICACHE);
66 	while (end > start) {
67 		asm volatile (
68 			"\n\tcctl %0, L1I_VA_INVAL"
69 			:
70 			: "r"(start)
71 		);
72 		start += line_size;
73 	}
74 }
75 
76 void icache_enable(void)
77 {
78 	asm volatile (
79 		"mfsr	$p0, $mr8\n\t"
80 		"ori	$p0, $p0, 0x01\n\t"
81 		"mtsr	$p0, $mr8\n\t"
82 		"isb\n\t"
83 	);
84 }
85 
86 void icache_disable(void)
87 {
88 	asm volatile (
89 		"mfsr	$p0, $mr8\n\t"
90 		"li	$p1, ~0x01\n\t"
91 		"and	$p0, $p0, $p1\n\t"
92 		"mtsr	$p0, $mr8\n\t"
93 		"isb\n\t"
94 	);
95 }
96 
97 int icache_status(void)
98 {
99 	int ret;
100 
101 	asm volatile (
102 		"mfsr	$p0, $mr8\n\t"
103 		"andi	%0,  $p0, 0x01\n\t"
104 		: "=r" (ret)
105 		:
106 		: "memory"
107 	);
108 
109 	return ret;
110 }
111 
112 #else
113 void invalidate_icache_all(void)
114 {
115 }
116 
117 void invalidate_icache_range(unsigned long start, unsigned long end)
118 {
119 }
120 
121 void icache_enable(void)
122 {
123 }
124 
125 void icache_disable(void)
126 {
127 }
128 
129 int icache_status(void)
130 {
131 	return 0;
132 }
133 
134 #endif
135 
136 #ifndef CONFIG_SYS_DCACHE_OFF
137 void dcache_wbinval_all(void)
138 {
139 	unsigned long end, line_size;
140 	line_size = CACHE_LINE_SIZE(DCACHE);
141 	end = line_size * CACHE_WAY(DCACHE) * CACHE_SET(DCACHE);
142 	do {
143 		end -= line_size;
144 		__asm__ volatile ("\n\tcctl %0, L1D_IX_WB" : : "r" (end));
145 		__asm__ volatile ("\n\tcctl %0, L1D_IX_INVAL" : : "r" (end));
146 		end -= line_size;
147 		__asm__ volatile ("\n\tcctl %0, L1D_IX_WB" : : "r" (end));
148 		__asm__ volatile ("\n\tcctl %0, L1D_IX_INVAL" : : "r" (end));
149 		end -= line_size;
150 		__asm__ volatile ("\n\tcctl %0, L1D_IX_WB" : : "r" (end));
151 		__asm__ volatile ("\n\tcctl %0, L1D_IX_INVAL" : : "r" (end));
152 		end -= line_size;
153 		__asm__ volatile ("\n\tcctl %0, L1D_IX_WB" : : "r" (end));
154 		__asm__ volatile ("\n\tcctl %0, L1D_IX_INVAL" : : "r" (end));
155 
156 	} while (end > 0);
157 }
158 
159 void flush_dcache_range(unsigned long start, unsigned long end)
160 {
161 	unsigned long line_size;
162 
163 	line_size = CACHE_LINE_SIZE(DCACHE);
164 
165 	while (end > start) {
166 		asm volatile (
167 			"\n\tcctl %0, L1D_VA_WB"
168 			"\n\tcctl %0, L1D_VA_INVAL" : : "r" (start)
169 		);
170 		start += line_size;
171 	}
172 }
173 
174 void invalidate_dcache_range(unsigned long start, unsigned long end)
175 {
176 	unsigned long line_size;
177 
178 	line_size = CACHE_LINE_SIZE(DCACHE);
179 	while (end > start) {
180 		asm volatile (
181 			"\n\tcctl %0, L1D_VA_INVAL" : : "r"(start)
182 		);
183 		start += line_size;
184 	}
185 }
186 
187 void dcache_enable(void)
188 {
189 	asm volatile (
190 		"mfsr	$p0, $mr8\n\t"
191 		"ori	$p0, $p0, 0x02\n\t"
192 		"mtsr	$p0, $mr8\n\t"
193 		"isb\n\t"
194 	);
195 }
196 
197 void dcache_disable(void)
198 {
199 	asm volatile (
200 		"mfsr	$p0, $mr8\n\t"
201 		"li	$p1, ~0x02\n\t"
202 		"and	$p0, $p0, $p1\n\t"
203 		"mtsr	$p0, $mr8\n\t"
204 		"isb\n\t"
205 	);
206 }
207 
208 int dcache_status(void)
209 {
210 	int ret;
211 	asm volatile (
212 		"mfsr	$p0, $mr8\n\t"
213 		"andi	%0, $p0, 0x02\n\t"
214 		: "=r" (ret)
215 		:
216 		: "memory"
217 	);
218 	return ret;
219 }
220 
221 #else
222 void dcache_wbinval_all(void)
223 {
224 }
225 
226 void flush_dcache_range(unsigned long start, unsigned long end)
227 {
228 }
229 
230 void invalidate_dcache_range(unsigned long start, unsigned long end)
231 {
232 }
233 
234 void dcache_enable(void)
235 {
236 }
237 
238 void dcache_disable(void)
239 {
240 }
241 
242 int dcache_status(void)
243 {
244 	return 0;
245 }
246 
247 #endif
248 
249 
250 void flush_dcache_all(void)
251 {
252 	dcache_wbinval_all();
253 }
254 
255 void cache_flush(void)
256 {
257 	flush_dcache_all();
258 	invalidate_icache_all();
259 }
260 
261 
262 void flush_cache(unsigned long addr, unsigned long size)
263 {
264 	flush_dcache_range(addr, addr + size);
265 	invalidate_icache_range(addr, addr + size);
266 }
267