2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #ifndef _ASM_ARC_ARCREGS_H
10 #define _ASM_ARC_ARCREGS_H
14 /* Build Configuration Registers */
15 #define ARC_REG_DCCMBASE_BCR 0x61 /* DCCM Base Addr */
16 #define ARC_REG_CRC_BCR 0x62
17 #define ARC_REG_DVFB_BCR 0x64
18 #define ARC_REG_EXTARITH_BCR 0x65
19 #define ARC_REG_VECBASE_BCR 0x68
20 #define ARC_REG_PERIBASE_BCR 0x69
21 #define ARC_REG_FP_BCR 0x6B /* Single-Precision FPU */
22 #define ARC_REG_DPFP_BCR 0x6C /* Dbl Precision FPU */
23 #define ARC_REG_DCCM_BCR 0x74 /* DCCM Present + SZ */
24 #define ARC_REG_TIMERS_BCR 0x75
25 #define ARC_REG_ICCM_BCR 0x78
26 #define ARC_REG_XY_MEM_BCR 0x79
27 #define ARC_REG_MAC_BCR 0x7a
28 #define ARC_REG_MUL_BCR 0x7b
29 #define ARC_REG_SWAP_BCR 0x7c
30 #define ARC_REG_NORM_BCR 0x7d
31 #define ARC_REG_MIXMAX_BCR 0x7e
32 #define ARC_REG_BARREL_BCR 0x7f
33 #define ARC_REG_D_UNCACH_BCR 0x6A
35 /* status32 Bits Positions */
36 #define STATUS_AE_BIT 5 /* Exception active */
37 #define STATUS_DE_BIT 6 /* PC is in delay slot */
38 #define STATUS_U_BIT 7 /* User/Kernel mode */
39 #define STATUS_L_BIT 12 /* Loop inhibit */
41 /* These masks correspond to the status word(STATUS_32) bits */
42 #define STATUS_AE_MASK (1<<STATUS_AE_BIT)
43 #define STATUS_DE_MASK (1<<STATUS_DE_BIT)
44 #define STATUS_U_MASK (1<<STATUS_U_BIT)
45 #define STATUS_L_MASK (1<<STATUS_L_BIT)
48 * ECR: Exception Cause Reg bits-n-pieces
49 * [23:16] = Exception Vector
50 * [15: 8] = Exception Cause Code
51 * [ 7: 0] = Exception Parameters (for certain types only)
53 #define ECR_VEC_MASK 0xff0000
54 #define ECR_CODE_MASK 0x00ff00
55 #define ECR_PARAM_MASK 0x0000ff
57 /* Exception Cause Vector Values */
58 #define ECR_V_INSN_ERR 0x02
59 #define ECR_V_MACH_CHK 0x20
60 #define ECR_V_ITLB_MISS 0x21
61 #define ECR_V_DTLB_MISS 0x22
62 #define ECR_V_PROTV 0x23
63 #define ECR_V_TRAP 0x25
65 /* Protection Violation Exception Cause Code Values */
66 #define ECR_C_PROTV_INST_FETCH 0x00
67 #define ECR_C_PROTV_LOAD 0x01
68 #define ECR_C_PROTV_STORE 0x02
69 #define ECR_C_PROTV_XCHG 0x03
70 #define ECR_C_PROTV_MISALIG_DATA 0x04
72 #define ECR_C_BIT_PROTV_MISALIG_DATA 10
74 /* Machine Check Cause Code Values */
75 #define ECR_C_MCHK_DUP_TLB 0x01
77 /* DTLB Miss Exception Cause Code Values */
78 #define ECR_C_BIT_DTLB_LD_MISS 8
79 #define ECR_C_BIT_DTLB_ST_MISS 9
81 /* Dummy ECR values for Interrupts */
82 #define event_IRQ1 0x0031abcd
83 #define event_IRQ2 0x0032abcd
85 /* Auxiliary registers */
86 #define AUX_IDENTITY 4
87 #define AUX_INTR_VEC_BASE 0x25
91 * Floating Pt Registers
92 * Status regs are read-only (build-time) so need not be saved/restored
94 #define ARC_AUX_FP_STAT 0x300
95 #define ARC_AUX_DPFP_1L 0x301
96 #define ARC_AUX_DPFP_1H 0x302
97 #define ARC_AUX_DPFP_2L 0x303
98 #define ARC_AUX_DPFP_2H 0x304
99 #define ARC_AUX_DPFP_STAT 0x305
104 ******************************************************************
105 * Inline ASM macros to read/write AUX Regs
106 * Essentially invocation of lr/sr insns from "C"
111 #define read_aux_reg(reg) __builtin_arc_lr(reg)
113 /* gcc builtin sr needs reg param to be long immediate */
114 #define write_aux_reg(reg_immed, val) \
115 __builtin_arc_sr((unsigned int)val, reg_immed)
119 #define read_aux_reg(reg) \
121 unsigned int __ret; \
122 __asm__ __volatile__( \
130 * Aux Reg address is specified as long immediate by caller
132 * write_aux_reg(0x69, some_val);
133 * This generates tightest code.
135 #define write_aux_reg(reg_imm, val) \
137 __asm__ __volatile__( \
140 : "ir"(val), "i"(reg_imm)); \
144 * Aux Reg address is specified in a variable
147 * write_aux_reg2(reg_num, some_val);
148 * This has to generate glue code to load the reg num from
149 * memory to a reg hence not recommended.
151 #define write_aux_reg2(reg_in_var, val) \
155 __asm__ __volatile__( \
156 " ld %0, [%2] \n\t" \
157 " sr %1, [%0] \n\t" \
159 : "r"(val), "memory"(®_in_var)); \
164 #define READ_BCR(reg, into) \
167 tmp = read_aux_reg(reg); \
168 if (sizeof(tmp) == sizeof(into)) { \
169 into = *((typeof(into) *)&tmp); \
171 extern void bogus_undefined(void); \
176 #define WRITE_BCR(reg, into) \
179 if (sizeof(tmp) == sizeof(into)) { \
180 tmp = (*(unsigned int *)(into)); \
181 write_aux_reg(reg, tmp); \
183 extern void bogus_undefined(void); \
189 #define TO_KB(bytes) ((bytes) >> 10)
190 #define TO_MB(bytes) (TO_KB(bytes) >> 10)
191 #define PAGES_TO_KB(n_pages) ((n_pages) << (PAGE_SHIFT - 10))
192 #define PAGES_TO_MB(n_pages) (PAGES_TO_KB(n_pages) >> 10)
194 #ifdef CONFIG_ARC_FPU_SAVE_RESTORE
195 /* These DPFP regs need to be saved/restored across ctx-sw */
204 ***************************************************************
205 * Build Configuration Registers, with encoded hardware config
207 struct bcr_identity {
208 #ifdef CONFIG_CPU_BIG_ENDIAN
209 unsigned int chip_id:16, cpu_id:8, family:8;
211 unsigned int family:8, cpu_id:8, chip_id:16;
215 #define EXTN_SWAP_VALID 0x1
216 #define EXTN_NORM_VALID 0x2
217 #define EXTN_MINMAX_VALID 0x2
218 #define EXTN_BARREL_VALID 0x2
221 #ifdef CONFIG_CPU_BIG_ENDIAN
222 unsigned int pad:20, crc:1, ext_arith:2, mul:2, barrel:2, minmax:2,
225 unsigned int swap:1, norm:2, minmax:2, barrel:2, mul:2, ext_arith:2,
230 /* DSP Options Ref Manual */
231 struct bcr_extn_mac_mul {
232 #ifdef CONFIG_CPU_BIG_ENDIAN
233 unsigned int pad:16, type:8, ver:8;
235 unsigned int ver:8, type:8, pad:16;
239 struct bcr_extn_xymem {
240 #ifdef CONFIG_CPU_BIG_ENDIAN
241 unsigned int ram_org:2, num_banks:4, bank_sz:4, ver:8;
243 unsigned int ver:8, bank_sz:4, num_banks:4, ram_org:2;
248 #ifdef CONFIG_CPU_BIG_ENDIAN
249 unsigned int start:8, pad2:8, sz:8, pad:8;
251 unsigned int pad:8, sz:8, pad2:8, start:8;
255 #ifdef CONFIG_CPU_BIG_ENDIAN
256 unsigned int base:16, pad:5, sz:3, ver:8;
258 unsigned int ver:8, sz:3, pad:5, base:16;
262 /* DCCM Base Address Register: ARC_REG_DCCMBASE_BCR */
263 struct bcr_dccm_base {
264 #ifdef CONFIG_CPU_BIG_ENDIAN
265 unsigned int addr:24, ver:8;
267 unsigned int ver:8, addr:24;
271 /* DCCM RAM Configuration Register: ARC_REG_DCCM_BCR */
273 #ifdef CONFIG_CPU_BIG_ENDIAN
274 unsigned int res:21, sz:3, ver:8;
276 unsigned int ver:8, sz:3, res:21;
280 /* Both SP and DP FPU BCRs have same format */
282 #ifdef CONFIG_CPU_BIG_ENDIAN
283 unsigned int fast:1, ver:8;
285 unsigned int ver:8, fast:1;
290 *******************************************************************
291 * Generic structures to hold build configuration used at runtime
294 struct cpuinfo_arc_mmu {
295 unsigned int ver, pg_sz, sets, ways, u_dtlb, u_itlb, num_tlb;
298 struct cpuinfo_arc_cache {
299 unsigned int sz, line_len, assoc, ver;
302 struct cpuinfo_arc_ccm {
303 unsigned int base_addr, sz;
307 struct cpuinfo_arc_cache icache, dcache;
308 struct cpuinfo_arc_mmu mmu;
309 struct bcr_identity core;
311 unsigned int vec_base;
312 unsigned int uncached_base;
313 struct cpuinfo_arc_ccm iccm, dccm;
314 struct bcr_extn extn;
315 struct bcr_extn_xymem extn_xymem;
316 struct bcr_extn_mac_mul extn_mac_mul;
317 struct bcr_fp fp, dpfp;
320 extern struct cpuinfo_arc cpuinfo_arc700[];
322 #endif /* __ASEMBLY__ */
324 #endif /* __KERNEL__ */
326 #endif /* _ASM_ARC_ARCREGS_H */