1 #ifndef CYGONCE_VAR_CACHE_H
2 #define CYGONCE_VAR_CACHE_H
4 //=============================================================================
8 // HAL cache control API
10 //=============================================================================
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42 //####ECOSGPLCOPYRIGHTEND####
43 //=============================================================================
44 //#####DESCRIPTIONBEGIN####
47 // Contributors: nickg
49 // Purpose: Cache control API
50 // Description: The macros defined here provide the HAL APIs for handling
51 // cache control operations.
53 // #include <cyg/hal/var_cache.h>
57 //####DESCRIPTIONEND####
59 //=============================================================================
61 #include <pkgconf/hal.h>
62 #include <cyg/infra/cyg_type.h>
64 //#include <cyg/hal/plf_cache.h>
66 //=============================================================================
67 // MN103002 implementation
69 //-----------------------------------------------------------------------------
74 #define HAL_DCACHE_SIZE 4096 // Size of data cache in bytes
75 #define HAL_DCACHE_LINE_SIZE 16 // Size of a data cache line
76 #define HAL_DCACHE_WAYS 2 // Associativity of the cache
79 #define HAL_ICACHE_SIZE 4096 // Size of cache in bytes
80 #define HAL_ICACHE_LINE_SIZE 16 // Size of a cache line
81 #define HAL_ICACHE_WAYS 2 // Associativity of the cache
83 #define HAL_DCACHE_SETS (HAL_DCACHE_SIZE/(HAL_DCACHE_LINE_SIZE*HAL_DCACHE_WAYS))
84 #define HAL_ICACHE_SETS (HAL_ICACHE_SIZE/(HAL_ICACHE_LINE_SIZE*HAL_ICACHE_WAYS))
86 //-----------------------------------------------------------------------------
89 #define HAL_CHCTR ((volatile CYG_ADDRWORD *)0x20000070)
91 #define HAL_CHCTR_ICEN 0x0001
92 #define HAL_CHCTR_DCEN 0x0002
93 #define HAL_CHCTR_ICBUSY 0x0004
94 #define HAL_CHCTR_DCBUSY 0x0008
95 #define HAL_CHCTR_ICINV 0x0010
96 #define HAL_CHCTR_DCINV 0x0020
97 #define HAL_CHCTR_DCWTMD 0x0040
98 #define HAL_CHCTR_ICWMD 0x0300
99 #define HAL_CHCTR_DCWMD 0x3000
101 #define HAL_DCACHE_PURGE_WAY0 ((volatile CYG_BYTE *)0x28400000)
102 #define HAL_DCACHE_PURGE_WAY1 ((volatile CYG_BYTE *)0x28401000)
104 //-----------------------------------------------------------------------------
105 // Global control of data cache
107 // Enable the data cache
108 #define HAL_DCACHE_ENABLE() \
110 register CYG_ADDRWORD chctr = *HAL_CHCTR; \
111 chctr |= HAL_CHCTR_DCEN; \
112 *HAL_CHCTR = chctr; \
115 // Disable the data cache
116 #define HAL_DCACHE_DISABLE() \
118 register CYG_ADDRWORD chctr = *HAL_CHCTR; \
119 chctr &= ~HAL_CHCTR_DCEN; \
120 *HAL_CHCTR = chctr; \
121 while( HAL_CHCTR_DCBUSY & *HAL_CHCTR ); \
124 // Query the state of the data cache
125 #define HAL_DCACHE_IS_ENABLED(_state_) \
127 register CYG_ADDRWORD chctr = *HAL_CHCTR; \
128 _state_ = (0 != (chctr & HAL_CHCTR_DCEN)); \
131 // Invalidate the entire cache
132 #define HAL_DCACHE_INVALIDATE_ALL() \
134 register CYG_ADDRWORD chctr; \
135 register CYG_ADDRWORD state; \
136 HAL_DCACHE_IS_ENABLED(state); \
138 HAL_DCACHE_DISABLE(); \
139 chctr = *HAL_CHCTR; \
140 chctr |= HAL_CHCTR_DCINV; \
141 *HAL_CHCTR = chctr; \
142 while( HAL_CHCTR_DCBUSY & *HAL_CHCTR ); \
144 HAL_DCACHE_ENABLE(); \
147 // Synchronize the contents of the cache with memory.
148 #define HAL_DCACHE_SYNC() HAL_DCACHE_STORE( 0, HAL_DCACHE_SIZE/HAL_DCACHE_WAYS )
150 // Set the data cache refill burst size
151 //#define HAL_DCACHE_BURST_SIZE(_size_)
153 // Set the data cache write mode
154 #define HAL_DCACHE_WRITE_MODE( _mode_ ) \
156 register CYG_ADDRWORD chctr; \
157 register CYG_ADDRWORD state; \
158 HAL_DCACHE_IS_ENABLED(state); \
160 HAL_DCACHE_DISABLE(); \
161 chctr = *HAL_CHCTR; \
162 chctr |= HAL_CHCTR_DCWTMD*(_mode_); \
163 *HAL_CHCTR = chctr; \
164 while( HAL_CHCTR_DCBUSY & *HAL_CHCTR ); \
166 HAL_DCACHE_ENABLE(); \
169 #define HAL_DCACHE_WRITEBACK_MODE 0
170 #define HAL_DCACHE_WRITETHRU_MODE 1
172 // Load the contents of the given address range into the data cache
173 // and then lock the cache so that it stays there.
174 //#define HAL_DCACHE_LOCK(_base_, _size_)
176 // Undo a previous lock operation
177 //#define HAL_DCACHE_UNLOCK(_base_, _size_)
179 // Unlock entire cache
180 //#define HAL_DCACHE_UNLOCK_ALL()
182 //-----------------------------------------------------------------------------
183 // Data cache line control
185 // Allocate cache lines for the given address range without reading its
186 // contents from memory.
187 //#define HAL_DCACHE_ALLOCATE( _base_ , _size_ )
189 // Write dirty cache lines to memory and invalidate the cache entries
190 // for the given address range.
191 //#define HAL_DCACHE_FLUSH( _base_ , _size_ )
193 // Invalidate cache lines in the given range without writing to memory.
194 //#define HAL_DCACHE_INVALIDATE( _base_ , _size_ )
196 // Write dirty cache lines to memory for the given address range.
198 // This functionality requires 4 register variables. To prevent register
199 // spilling, put the code in a separate function.
200 externC void cyg_hal_dcache_store(CYG_ADDRWORD base, int size);
202 #define HAL_DCACHE_STORE( _base_ , _size_ ) \
203 cyg_hal_dcache_store((CYG_ADDRWORD)(_base_), (int)(_size_))
205 // Preread the given range into the cache with the intention of reading
207 //#define HAL_DCACHE_READ_HINT( _base_ , _size_ )
209 // Preread the given range into the cache with the intention of writing
211 //#define HAL_DCACHE_WRITE_HINT( _base_ , _size_ )
213 // Allocate and zero the cache lines associated with the given range.
214 //#define HAL_DCACHE_ZERO( _base_ , _size_ )
216 //-----------------------------------------------------------------------------
217 // Global control of Instruction cache
219 // Enable the instruction cache
220 #define HAL_ICACHE_ENABLE() \
222 register CYG_ADDRWORD chctr = *HAL_CHCTR; \
223 chctr |= HAL_CHCTR_ICEN; \
224 *HAL_CHCTR = chctr; \
227 // Disable the instruction cache
228 #define HAL_ICACHE_DISABLE() \
230 register CYG_ADDRWORD chctr = *HAL_CHCTR; \
231 chctr &= ~HAL_CHCTR_ICEN; \
232 *HAL_CHCTR = chctr; \
233 while( HAL_CHCTR_ICBUSY & *HAL_CHCTR ); \
236 // Query the state of the instruction cache
237 #define HAL_ICACHE_IS_ENABLED(_state_) \
239 register CYG_ADDRWORD chctr = *HAL_CHCTR; \
240 _state_ = (0 != (chctr & HAL_CHCTR_ICEN)); \
243 // Invalidate the entire cache
244 #define HAL_ICACHE_INVALIDATE_ALL() \
246 register CYG_ADDRWORD chctr; \
247 register CYG_ADDRWORD state; \
248 HAL_ICACHE_IS_ENABLED(state); \
250 HAL_ICACHE_DISABLE(); \
251 chctr = *HAL_CHCTR; \
252 chctr |= HAL_CHCTR_ICINV; \
253 *HAL_CHCTR = chctr; \
254 while( HAL_CHCTR_ICBUSY & *HAL_CHCTR ); \
256 HAL_ICACHE_ENABLE(); \
259 // Synchronize the contents of the cache with memory.
260 #define HAL_ICACHE_SYNC()
262 // Set the instruction cache refill burst size
263 //#define HAL_ICACHE_BURST_SIZE(_size_)
265 // Load the contents of the given address range into the instruction cache
266 // and then lock the cache so that it stays there.
267 //#define HAL_ICACHE_LOCK(_base_, _size_)
269 // Undo a previous lock operation
270 //#define HAL_ICACHE_UNLOCK(_base_, _size_)
272 // Unlock entire cache
273 //#define HAL_ICACHE_UNLOCK_ALL()
275 //-----------------------------------------------------------------------------
276 // Instruction cache line control
278 // Invalidate cache lines in the given range without writing to memory.
279 //#define HAL_ICACHE_INVALIDATE( _base_ , _size_ )
281 //-----------------------------------------------------------------------------
282 #endif // ifndef CYGONCE_VAR_CACHE_H
283 // End of var_cache.h