2 * Copyright (C) 2013 Imagination Technologies
3 * Author: Paul Burton <paul.burton@imgtec.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
11 #ifndef __MIPS_ASM_MIPS_CM_H__
12 #define __MIPS_ASM_MIPS_CM_H__
14 #include <linux/errno.h>
16 #include <linux/types.h>
18 /* The base address of the CM GCR block */
19 extern void __iomem *mips_cm_base;
21 /* The base address of the CM L2-only sync region */
22 extern void __iomem *mips_cm_l2sync_base;
25 * __mips_cm_phys_base - retrieve the physical base address of the CM
27 * This function returns the physical base address of the Coherence Manager
28 * global control block, or 0 if no Coherence Manager is present. It provides
29 * a default implementation which reads the CMGCRBase register where available,
30 * and may be overriden by platforms which determine this address in a
31 * different way by defining a function with the same prototype except for the
32 * name mips_cm_phys_base (without underscores).
34 extern phys_addr_t __mips_cm_phys_base(void);
37 * mips_cm_probe - probe for a Coherence Manager
39 * Attempt to detect the presence of a Coherence Manager. Returns 0 if a CM
40 * is successfully detected, else -errno.
43 extern int mips_cm_probe(void);
45 static inline int mips_cm_probe(void)
52 * mips_cm_present - determine whether a Coherence Manager is present
54 * Returns true if a CM is present in the system, else false.
56 static inline bool mips_cm_present(void)
59 return mips_cm_base != NULL;
66 * mips_cm_has_l2sync - determine whether an L2-only sync region is present
68 * Returns true if the system implements an L2-only sync region, else false.
70 static inline bool mips_cm_has_l2sync(void)
73 return mips_cm_l2sync_base != NULL;
79 /* Offsets to register blocks from the CM base address */
80 #define MIPS_CM_GCB_OFS 0x0000 /* Global Control Block */
81 #define MIPS_CM_CLCB_OFS 0x2000 /* Core Local Control Block */
82 #define MIPS_CM_COCB_OFS 0x4000 /* Core Other Control Block */
83 #define MIPS_CM_GDB_OFS 0x6000 /* Global Debug Block */
85 /* Total size of the CM memory mapped registers */
86 #define MIPS_CM_GCR_SIZE 0x8000
88 /* Size of the L2-only sync region */
89 #define MIPS_CM_L2SYNC_SIZE 0x1000
91 /* Macros to ease the creation of register access functions */
92 #define BUILD_CM_R_(name, off) \
93 static inline u32 __iomem *addr_gcr_##name(void) \
95 return (u32 __iomem *)(mips_cm_base + (off)); \
98 static inline u32 read_gcr_##name(void) \
100 return __raw_readl(addr_gcr_##name()); \
103 #define BUILD_CM__W(name, off) \
104 static inline void write_gcr_##name(u32 value) \
106 __raw_writel(value, addr_gcr_##name()); \
109 #define BUILD_CM_RW(name, off) \
110 BUILD_CM_R_(name, off) \
111 BUILD_CM__W(name, off)
113 #define BUILD_CM_Cx_R_(name, off) \
114 BUILD_CM_R_(cl_##name, MIPS_CM_CLCB_OFS + (off)) \
115 BUILD_CM_R_(co_##name, MIPS_CM_COCB_OFS + (off))
117 #define BUILD_CM_Cx__W(name, off) \
118 BUILD_CM__W(cl_##name, MIPS_CM_CLCB_OFS + (off)) \
119 BUILD_CM__W(co_##name, MIPS_CM_COCB_OFS + (off))
121 #define BUILD_CM_Cx_RW(name, off) \
122 BUILD_CM_Cx_R_(name, off) \
123 BUILD_CM_Cx__W(name, off)
125 /* GCB register accessor functions */
126 BUILD_CM_R_(config, MIPS_CM_GCB_OFS + 0x00)
127 BUILD_CM_RW(base, MIPS_CM_GCB_OFS + 0x08)
128 BUILD_CM_RW(access, MIPS_CM_GCB_OFS + 0x20)
129 BUILD_CM_R_(rev, MIPS_CM_GCB_OFS + 0x30)
130 BUILD_CM_RW(error_mask, MIPS_CM_GCB_OFS + 0x40)
131 BUILD_CM_RW(error_cause, MIPS_CM_GCB_OFS + 0x48)
132 BUILD_CM_RW(error_addr, MIPS_CM_GCB_OFS + 0x50)
133 BUILD_CM_RW(error_mult, MIPS_CM_GCB_OFS + 0x58)
134 BUILD_CM_RW(l2_only_sync_base, MIPS_CM_GCB_OFS + 0x70)
135 BUILD_CM_RW(gic_base, MIPS_CM_GCB_OFS + 0x80)
136 BUILD_CM_RW(cpc_base, MIPS_CM_GCB_OFS + 0x88)
137 BUILD_CM_RW(reg0_base, MIPS_CM_GCB_OFS + 0x90)
138 BUILD_CM_RW(reg0_mask, MIPS_CM_GCB_OFS + 0x98)
139 BUILD_CM_RW(reg1_base, MIPS_CM_GCB_OFS + 0xa0)
140 BUILD_CM_RW(reg1_mask, MIPS_CM_GCB_OFS + 0xa8)
141 BUILD_CM_RW(reg2_base, MIPS_CM_GCB_OFS + 0xb0)
142 BUILD_CM_RW(reg2_mask, MIPS_CM_GCB_OFS + 0xb8)
143 BUILD_CM_RW(reg3_base, MIPS_CM_GCB_OFS + 0xc0)
144 BUILD_CM_RW(reg3_mask, MIPS_CM_GCB_OFS + 0xc8)
145 BUILD_CM_R_(gic_status, MIPS_CM_GCB_OFS + 0xd0)
146 BUILD_CM_R_(cpc_status, MIPS_CM_GCB_OFS + 0xf0)
147 BUILD_CM_RW(l2_config, MIPS_CM_GCB_OFS + 0x130)
149 /* Core Local & Core Other register accessor functions */
150 BUILD_CM_Cx_RW(reset_release, 0x00)
151 BUILD_CM_Cx_RW(coherence, 0x08)
152 BUILD_CM_Cx_R_(config, 0x10)
153 BUILD_CM_Cx_RW(other, 0x18)
154 BUILD_CM_Cx_RW(reset_base, 0x20)
155 BUILD_CM_Cx_R_(id, 0x28)
156 BUILD_CM_Cx_RW(reset_ext_base, 0x30)
157 BUILD_CM_Cx_R_(tcid_0_priority, 0x40)
158 BUILD_CM_Cx_R_(tcid_1_priority, 0x48)
159 BUILD_CM_Cx_R_(tcid_2_priority, 0x50)
160 BUILD_CM_Cx_R_(tcid_3_priority, 0x58)
161 BUILD_CM_Cx_R_(tcid_4_priority, 0x60)
162 BUILD_CM_Cx_R_(tcid_5_priority, 0x68)
163 BUILD_CM_Cx_R_(tcid_6_priority, 0x70)
164 BUILD_CM_Cx_R_(tcid_7_priority, 0x78)
165 BUILD_CM_Cx_R_(tcid_8_priority, 0x80)
167 /* GCR_CONFIG register fields */
168 #define CM_GCR_CONFIG_NUMIOCU_SHF 8
169 #define CM_GCR_CONFIG_NUMIOCU_MSK (_ULCAST_(0xf) << 8)
170 #define CM_GCR_CONFIG_PCORES_SHF 0
171 #define CM_GCR_CONFIG_PCORES_MSK (_ULCAST_(0xff) << 0)
173 /* GCR_BASE register fields */
174 #define CM_GCR_BASE_GCRBASE_SHF 15
175 #define CM_GCR_BASE_GCRBASE_MSK (_ULCAST_(0x1ffff) << 15)
176 #define CM_GCR_BASE_CMDEFTGT_SHF 0
177 #define CM_GCR_BASE_CMDEFTGT_MSK (_ULCAST_(0x3) << 0)
178 #define CM_GCR_BASE_CMDEFTGT_DISABLED 0
179 #define CM_GCR_BASE_CMDEFTGT_MEM 1
180 #define CM_GCR_BASE_CMDEFTGT_IOCU0 2
181 #define CM_GCR_BASE_CMDEFTGT_IOCU1 3
183 /* GCR_ACCESS register fields */
184 #define CM_GCR_ACCESS_ACCESSEN_SHF 0
185 #define CM_GCR_ACCESS_ACCESSEN_MSK (_ULCAST_(0xff) << 0)
187 /* GCR_REV register fields */
188 #define CM_GCR_REV_MAJOR_SHF 8
189 #define CM_GCR_REV_MAJOR_MSK (_ULCAST_(0xff) << 8)
190 #define CM_GCR_REV_MINOR_SHF 0
191 #define CM_GCR_REV_MINOR_MSK (_ULCAST_(0xff) << 0)
193 #define CM_ENCODE_REV(major, minor) \
194 (((major) << CM_GCR_REV_MAJOR_SHF) | \
195 ((minor) << CM_GCR_REV_MINOR_SHF))
197 #define CM_REV_CM2 CM_ENCODE_REV(6, 0)
198 #define CM_REV_CM3 CM_ENCODE_REV(8, 0)
200 /* GCR_ERROR_CAUSE register fields */
201 #define CM_GCR_ERROR_CAUSE_ERRTYPE_SHF 27
202 #define CM_GCR_ERROR_CAUSE_ERRTYPE_MSK (_ULCAST_(0x1f) << 27)
203 #define CM_GCR_ERROR_CAUSE_ERRINFO_SHF 0
204 #define CM_GCR_ERROR_CAUSE_ERRINGO_MSK (_ULCAST_(0x7ffffff) << 0)
206 /* GCR_ERROR_MULT register fields */
207 #define CM_GCR_ERROR_MULT_ERR2ND_SHF 0
208 #define CM_GCR_ERROR_MULT_ERR2ND_MSK (_ULCAST_(0x1f) << 0)
210 /* GCR_L2_ONLY_SYNC_BASE register fields */
211 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE_SHF 12
212 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE_MSK (_ULCAST_(0xfffff) << 12)
213 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN_SHF 0
214 #define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN_MSK (_ULCAST_(0x1) << 0)
216 /* GCR_GIC_BASE register fields */
217 #define CM_GCR_GIC_BASE_GICBASE_SHF 17
218 #define CM_GCR_GIC_BASE_GICBASE_MSK (_ULCAST_(0x7fff) << 17)
219 #define CM_GCR_GIC_BASE_GICEN_SHF 0
220 #define CM_GCR_GIC_BASE_GICEN_MSK (_ULCAST_(0x1) << 0)
222 /* GCR_CPC_BASE register fields */
223 #define CM_GCR_CPC_BASE_CPCBASE_SHF 17
224 #define CM_GCR_CPC_BASE_CPCBASE_MSK (_ULCAST_(0x7fff) << 17)
225 #define CM_GCR_CPC_BASE_CPCEN_SHF 0
226 #define CM_GCR_CPC_BASE_CPCEN_MSK (_ULCAST_(0x1) << 0)
228 /* GCR_GIC_STATUS register fields */
229 #define CM_GCR_GIC_STATUS_GICEX_SHF 0
230 #define CM_GCR_GIC_STATUS_GICEX_MSK (_ULCAST_(0x1) << 0)
232 /* GCR_REGn_BASE register fields */
233 #define CM_GCR_REGn_BASE_BASEADDR_SHF 16
234 #define CM_GCR_REGn_BASE_BASEADDR_MSK (_ULCAST_(0xffff) << 16)
236 /* GCR_REGn_MASK register fields */
237 #define CM_GCR_REGn_MASK_ADDRMASK_SHF 16
238 #define CM_GCR_REGn_MASK_ADDRMASK_MSK (_ULCAST_(0xffff) << 16)
239 #define CM_GCR_REGn_MASK_CCAOVR_SHF 5
240 #define CM_GCR_REGn_MASK_CCAOVR_MSK (_ULCAST_(0x3) << 5)
241 #define CM_GCR_REGn_MASK_CCAOVREN_SHF 4
242 #define CM_GCR_REGn_MASK_CCAOVREN_MSK (_ULCAST_(0x1) << 4)
243 #define CM_GCR_REGn_MASK_DROPL2_SHF 2
244 #define CM_GCR_REGn_MASK_DROPL2_MSK (_ULCAST_(0x1) << 2)
245 #define CM_GCR_REGn_MASK_CMTGT_SHF 0
246 #define CM_GCR_REGn_MASK_CMTGT_MSK (_ULCAST_(0x3) << 0)
247 #define CM_GCR_REGn_MASK_CMTGT_DISABLED (_ULCAST_(0x0) << 0)
248 #define CM_GCR_REGn_MASK_CMTGT_MEM (_ULCAST_(0x1) << 0)
249 #define CM_GCR_REGn_MASK_CMTGT_IOCU0 (_ULCAST_(0x2) << 0)
250 #define CM_GCR_REGn_MASK_CMTGT_IOCU1 (_ULCAST_(0x3) << 0)
252 /* GCR_GIC_STATUS register fields */
253 #define CM_GCR_GIC_STATUS_EX_SHF 0
254 #define CM_GCR_GIC_STATUS_EX_MSK (_ULCAST_(0x1) << 0)
256 /* GCR_CPC_STATUS register fields */
257 #define CM_GCR_CPC_STATUS_EX_SHF 0
258 #define CM_GCR_CPC_STATUS_EX_MSK (_ULCAST_(0x1) << 0)
260 /* GCR_L2_CONFIG register fields */
261 #define CM_GCR_L2_CONFIG_BYPASS_SHF 20
262 #define CM_GCR_L2_CONFIG_BYPASS_MSK (_ULCAST_(0x1) << 20)
263 #define CM_GCR_L2_CONFIG_SET_SIZE_SHF 12
264 #define CM_GCR_L2_CONFIG_SET_SIZE_MSK (_ULCAST_(0xf) << 12)
265 #define CM_GCR_L2_CONFIG_LINE_SIZE_SHF 8
266 #define CM_GCR_L2_CONFIG_LINE_SIZE_MSK (_ULCAST_(0xf) << 8)
267 #define CM_GCR_L2_CONFIG_ASSOC_SHF 0
268 #define CM_GCR_L2_CONFIG_ASSOC_MSK (_ULCAST_(0xff) << 0)
270 /* GCR_Cx_COHERENCE register fields */
271 #define CM_GCR_Cx_COHERENCE_COHDOMAINEN_SHF 0
272 #define CM_GCR_Cx_COHERENCE_COHDOMAINEN_MSK (_ULCAST_(0xff) << 0)
274 /* GCR_Cx_CONFIG register fields */
275 #define CM_GCR_Cx_CONFIG_IOCUTYPE_SHF 10
276 #define CM_GCR_Cx_CONFIG_IOCUTYPE_MSK (_ULCAST_(0x3) << 10)
277 #define CM_GCR_Cx_CONFIG_PVPE_SHF 0
278 #define CM_GCR_Cx_CONFIG_PVPE_MSK (_ULCAST_(0x1ff) << 0)
280 /* GCR_Cx_OTHER register fields */
281 #define CM_GCR_Cx_OTHER_CORENUM_SHF 16
282 #define CM_GCR_Cx_OTHER_CORENUM_MSK (_ULCAST_(0xffff) << 16)
284 /* GCR_Cx_RESET_BASE register fields */
285 #define CM_GCR_Cx_RESET_BASE_BEVEXCBASE_SHF 12
286 #define CM_GCR_Cx_RESET_BASE_BEVEXCBASE_MSK (_ULCAST_(0xfffff) << 12)
288 /* GCR_Cx_RESET_EXT_BASE register fields */
289 #define CM_GCR_Cx_RESET_EXT_BASE_EVARESET_SHF 31
290 #define CM_GCR_Cx_RESET_EXT_BASE_EVARESET_MSK (_ULCAST_(0x1) << 31)
291 #define CM_GCR_Cx_RESET_EXT_BASE_UEB_SHF 30
292 #define CM_GCR_Cx_RESET_EXT_BASE_UEB_MSK (_ULCAST_(0x1) << 30)
293 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK_SHF 20
294 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK_MSK (_ULCAST_(0xff) << 20)
295 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA_SHF 1
296 #define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA_MSK (_ULCAST_(0x7f) << 1)
297 #define CM_GCR_Cx_RESET_EXT_BASE_PRESENT_SHF 0
298 #define CM_GCR_Cx_RESET_EXT_BASE_PRESENT_MSK (_ULCAST_(0x1) << 0)
301 * mips_cm_numcores - return the number of cores present in the system
303 * Returns the value of the PCORES field of the GCR_CONFIG register plus 1, or
304 * zero if no Coherence Manager is present.
306 static inline unsigned mips_cm_numcores(void)
308 if (!mips_cm_present())
311 return ((read_gcr_config() & CM_GCR_CONFIG_PCORES_MSK)
312 >> CM_GCR_CONFIG_PCORES_SHF) + 1;
316 * mips_cm_numiocu - return the number of IOCUs present in the system
318 * Returns the value of the NUMIOCU field of the GCR_CONFIG register, or zero
319 * if no Coherence Manager is present.
321 static inline unsigned mips_cm_numiocu(void)
323 if (!mips_cm_present())
326 return (read_gcr_config() & CM_GCR_CONFIG_NUMIOCU_MSK)
327 >> CM_GCR_CONFIG_NUMIOCU_SHF;
331 * mips_cm_l2sync - perform an L2-only sync operation
333 * If an L2-only sync region is present in the system then this function
334 * performs and L2-only sync and returns zero. Otherwise it returns -ENODEV.
336 static inline int mips_cm_l2sync(void)
338 if (!mips_cm_has_l2sync())
341 writel(0, mips_cm_l2sync_base);
346 * mips_cm_revision() - return CM revision
348 * Return: The revision of the CM, from GCR_REV, or 0 if no CM is present. The
349 * return value should be checked against the CM_REV_* macros.
351 static inline int mips_cm_revision(void)
353 if (!mips_cm_present())
356 return read_gcr_rev();
359 #endif /* __MIPS_ASM_MIPS_CM_H__ */