summaryrefslogtreecommitdiff
path: root/arch/arc/include/asm/arcregs.h
blob: c8f57b8449dcf6a36aa61cd3589b90ebba42d7ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
/*
 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _ASM_ARC_ARCREGS_H
#define _ASM_ARC_ARCREGS_H

/* Build Configuration Registers */
#define ARC_REG_DCCMBASE_BCR	0x61	/* DCCM Base Addr */
#define ARC_REG_CRC_BCR		0x62
#define ARC_REG_VECBASE_BCR	0x68
#define ARC_REG_PERIBASE_BCR	0x69
#define ARC_REG_FP_BCR		0x6B	/* ARCompact: Single-Precision FPU */
#define ARC_REG_DPFP_BCR	0x6C	/* ARCompact: Dbl Precision FPU */
#define ARC_REG_FP_V2_BCR	0xc8	/* ARCv2 FPU */
#define ARC_REG_SLC_BCR		0xce
#define ARC_REG_DCCM_BCR	0x74	/* DCCM Present + SZ */
#define ARC_REG_TIMERS_BCR	0x75
#define ARC_REG_AP_BCR		0x76
#define ARC_REG_ICCM_BCR	0x78
#define ARC_REG_XY_MEM_BCR	0x79
#define ARC_REG_MAC_BCR		0x7a
#define ARC_REG_MUL_BCR		0x7b
#define ARC_REG_SWAP_BCR	0x7c
#define ARC_REG_NORM_BCR	0x7d
#define ARC_REG_MIXMAX_BCR	0x7e
#define ARC_REG_BARREL_BCR	0x7f
#define ARC_REG_D_UNCACH_BCR	0x6A
#define ARC_REG_BPU_BCR		0xc0
#define ARC_REG_ISA_CFG_BCR	0xc1
#define ARC_REG_RTT_BCR		0xF2
#define ARC_REG_IRQ_BCR		0xF3
#define ARC_REG_SMART_BCR	0xFF

/* status32 Bits Positions */
#define STATUS_AE_BIT		5	/* Exception active */
#define STATUS_DE_BIT		6	/* PC is in delay slot */
#define STATUS_U_BIT		7	/* User/Kernel mode */
#define STATUS_L_BIT		12	/* Loop inhibit */

/* These masks correspond to the status word(STATUS_32) bits */
#define STATUS_AE_MASK		(1<<STATUS_AE_BIT)
#define STATUS_DE_MASK		(1<<STATUS_DE_BIT)
#define STATUS_U_MASK		(1<<STATUS_U_BIT)
#define STATUS_L_MASK		(1<<STATUS_L_BIT)

/*
 * ECR: Exception Cause Reg bits-n-pieces
 * [23:16] = Exception Vector
 * [15: 8] = Exception Cause Code
 * [ 7: 0] = Exception Parameters (for certain types only)
 */
#ifdef CONFIG_ISA_ARCOMPACT
#define ECR_V_MEM_ERR			0x01
#define ECR_V_INSN_ERR			0x02
#define ECR_V_MACH_CHK			0x20
#define ECR_V_ITLB_MISS			0x21
#define ECR_V_DTLB_MISS			0x22
#define ECR_V_PROTV			0x23
#define ECR_V_TRAP			0x25
#else
#define ECR_V_MEM_ERR			0x01
#define ECR_V_INSN_ERR			0x02
#define ECR_V_MACH_CHK			0x03
#define ECR_V_ITLB_MISS			0x04
#define ECR_V_DTLB_MISS			0x05
#define ECR_V_PROTV			0x06
#define ECR_V_TRAP			0x09
#endif

/* DTLB Miss and Protection Violation Cause Codes */

#define ECR_C_PROTV_INST_FETCH		0x00
#define ECR_C_PROTV_LOAD		0x01
#define ECR_C_PROTV_STORE		0x02
#define ECR_C_PROTV_XCHG		0x03
#define ECR_C_PROTV_MISALIG_DATA	0x04

#define ECR_C_BIT_PROTV_MISALIG_DATA	10

/* Machine Check Cause Code Values */
#define ECR_C_MCHK_DUP_TLB		0x01

/* DTLB Miss Exception Cause Code Values */
#define ECR_C_BIT_DTLB_LD_MISS		8
#define ECR_C_BIT_DTLB_ST_MISS		9

/* Auxiliary registers */
#define AUX_IDENTITY		4
#define AUX_INTR_VEC_BASE	0x25
#define AUX_NON_VOL		0x5e

/*
 * Floating Pt Registers
 * Status regs are read-only (build-time) so need not be saved/restored
 */
#define ARC_AUX_FP_STAT         0x300
#define ARC_AUX_DPFP_1L         0x301
#define ARC_AUX_DPFP_1H         0x302
#define ARC_AUX_DPFP_2L         0x303
#define ARC_AUX_DPFP_2H         0x304
#define ARC_AUX_DPFP_STAT       0x305

#ifndef __ASSEMBLY__

/*
 ******************************************************************
 *      Inline ASM macros to read/write AUX Regs
 *      Essentially invocation of lr/sr insns from "C"
 */

#if 1

#define read_aux_reg(reg)	__builtin_arc_lr(reg)

/* gcc builtin sr needs reg param to be long immediate */
#define write_aux_reg(reg_immed, val)		\
		__builtin_arc_sr((unsigned int)val, reg_immed)

#else

#define read_aux_reg(reg)		\
({					\
	unsigned int __ret;		\
	__asm__ __volatile__(		\
	"	lr    %0, [%1]"		\
	: "=r"(__ret)			\
	: "i"(reg));			\
	__ret;				\
})

/*
 * Aux Reg address is specified as long immediate by caller
 * e.g.
 *    write_aux_reg(0x69, some_val);
 * This generates tightest code.
 */
#define write_aux_reg(reg_imm, val)	\
({					\
	__asm__ __volatile__(		\
	"	sr   %0, [%1]	\n"	\
	:				\
	: "ir"(val), "i"(reg_imm));	\
})

/*
 * Aux Reg address is specified in a variable
 *  * e.g.
 *      reg_num = 0x69
 *      write_aux_reg2(reg_num, some_val);
 * This has to generate glue code to load the reg num from
 *  memory to a reg hence not recommended.
 */
#define write_aux_reg2(reg_in_var, val)		\
({						\
	unsigned int tmp;			\
						\
	__asm__ __volatile__(			\
	"	ld   %0, [%2]	\n\t"		\
	"	sr   %1, [%0]	\n\t"		\
	: "=&r"(tmp)				\
	: "r"(val), "memory"(&reg_in_var));	\
})

#endif

#define READ_BCR(reg, into)				\
{							\
	unsigned int tmp;				\
	tmp = read_aux_reg(reg);			\
	if (sizeof(tmp) == sizeof(into)) {		\
		into = *((typeof(into) *)&tmp);		\
	} else {					\
		extern void bogus_undefined(void);	\
		bogus_undefined();			\
	}						\
}

#define WRITE_AUX(reg, into)				\
{							\
	unsigned int tmp;				\
	if (sizeof(tmp) == sizeof(into)) {		\
		tmp = (*(unsigned int *)&(into));	\
		write_aux_reg(reg, tmp);		\
	} else  {					\
		extern void bogus_undefined(void);	\
		bogus_undefined();			\
	}						\
}

/* Helpers */
#define TO_KB(bytes)		((bytes) >> 10)
#define TO_MB(bytes)		(TO_KB(bytes) >> 10)
#define PAGES_TO_KB(n_pages)	((n_pages) << (PAGE_SHIFT - 10))
#define PAGES_TO_MB(n_pages)	(PAGES_TO_KB(n_pages) >> 10)


/*
 ***************************************************************
 * Build Configuration Registers, with encoded hardware config
 */
struct bcr_identity {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int chip_id:16, cpu_id:8, family:8;
#else
	unsigned int family:8, cpu_id:8, chip_id:16;
#endif
};

struct bcr_isa {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int div_rem:4, pad2:4, ldd:1, unalign:1, atomic:1, be:1,
		     pad1:11, atomic1:1, ver:8;
#else
	unsigned int ver:8, atomic1:1, pad1:11, be:1, atomic:1, unalign:1,
		     ldd:1, pad2:4, div_rem:4;
#endif
};

struct bcr_mpy {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int pad:8, x1616:8, dsp:4, cycles:2, type:2, ver:8;
#else
	unsigned int ver:8, type:2, cycles:2, dsp:4, x1616:8, pad:8;
#endif
};

struct bcr_extn_xymem {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int ram_org:2, num_banks:4, bank_sz:4, ver:8;
#else
	unsigned int ver:8, bank_sz:4, num_banks:4, ram_org:2;
#endif
};

struct bcr_perip {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int start:8, pad2:8, sz:8, ver:8;
#else
	unsigned int ver:8, sz:8, pad2:8, start:8;
#endif
};

struct bcr_iccm {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int base:16, pad:5, sz:3, ver:8;
#else
	unsigned int ver:8, sz:3, pad:5, base:16;
#endif
};

/* DCCM Base Address Register: ARC_REG_DCCMBASE_BCR */
struct bcr_dccm_base {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int addr:24, ver:8;
#else
	unsigned int ver:8, addr:24;
#endif
};

/* DCCM RAM Configuration Register: ARC_REG_DCCM_BCR */
struct bcr_dccm {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int res:21, sz:3, ver:8;
#else
	unsigned int ver:8, sz:3, res:21;
#endif
};

/* ARCompact: Both SP and DP FPU BCRs have same format */
struct bcr_fp_arcompact {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int fast:1, ver:8;
#else
	unsigned int ver:8, fast:1;
#endif
};

struct bcr_fp_arcv2 {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int pad2:15, dp:1, pad1:7, sp:1, ver:8;
#else
	unsigned int ver:8, sp:1, pad1:7, dp:1, pad2:15;
#endif
};

struct bcr_timer {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int pad2:15, rtsc:1, pad1:5, rtc:1, t1:1, t0:1, ver:8;
#else
	unsigned int ver:8, t0:1, t1:1, rtc:1, pad1:5, rtsc:1, pad2:15;
#endif
};

struct bcr_bpu_arcompact {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int pad2:19, fam:1, pad:2, ent:2, ver:8;
#else
	unsigned int ver:8, ent:2, pad:2, fam:1, pad2:19;
#endif
};

struct bcr_bpu_arcv2 {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int pad:6, fbe:2, tqe:2, ts:4, ft:1, rse:2, pte:3, bce:3, ver:8;
#else
	unsigned int ver:8, bce:3, pte:3, rse:2, ft:1, ts:4, tqe:2, fbe:2, pad:6;
#endif
};

struct bcr_generic {
#ifdef CONFIG_CPU_BIG_ENDIAN
	unsigned int pad:24, ver:8;
#else
	unsigned int ver:8, pad:24;
#endif
};

/*
 *******************************************************************
 * Generic structures to hold build configuration used at runtime
 */

struct cpuinfo_arc_mmu {
	unsigned int ver:4, pg_sz_k:8, s_pg_sz_m:8, u_dtlb:6, u_itlb:6;
	unsigned int num_tlb:16, sets:12, ways:4;
};

struct cpuinfo_arc_cache {
	unsigned int sz_k:14, line_len:8, assoc:4, ver:4, alias:1, vipt:1;
};

struct cpuinfo_arc_bpu {
	unsigned int ver, full, num_cache, num_pred;
};

struct cpuinfo_arc_ccm {
	unsigned int base_addr, sz;
};

struct cpuinfo_arc {
	struct cpuinfo_arc_cache icache, dcache, slc;
	struct cpuinfo_arc_mmu mmu;
	struct cpuinfo_arc_bpu bpu;
	struct bcr_identity core;
	struct bcr_isa isa;
	struct bcr_timer timers;
	unsigned int vec_base;
	struct cpuinfo_arc_ccm iccm, dccm;
	struct {
		unsigned int swap:1, norm:1, minmax:1, barrel:1, crc:1, pad1:3,
			     fpu_sp:1, fpu_dp:1, pad2:6,
			     debug:1, ap:1, smart:1, rtt:1, pad3:4,
			     pad4:8;
	} extn;
	struct bcr_mpy extn_mpy;
	struct bcr_extn_xymem extn_xymem;
};

extern struct cpuinfo_arc cpuinfo_arc700[];

static inline int is_isa_arcv2(void)
{
	return IS_ENABLED(CONFIG_ISA_ARCV2);
}

static inline int is_isa_arcompact(void)
{
	return IS_ENABLED(CONFIG_ISA_ARCOMPACT);
}

#if defined(CONFIG_ISA_ARCOMPACT) && !defined(_CPU_DEFAULT_A7)
#error "Toolchain not configured for ARCompact builds"
#elif defined(CONFIG_ISA_ARCV2) && !defined(_CPU_DEFAULT_HS)
#error "Toolchain not configured for ARCv2 builds"
#endif

#endif /* __ASEMBLY__ */

#endif /* _ASM_ARC_ARCREGS_H */