1 /*
2 * Macros for accessing system registers with older binutils.
3 *
4 * Copyright (C) 2014 ARM Ltd.
5 * Author: Catalin Marinas <catalin.marinas@arm.com>
6 *
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #ifndef __ASM_SYSREG_H
21 #define __ASM_SYSREG_H
22
23 #include <linux/stringify.h>
24
25 #include <asm/opcodes.h>
26
27 /*
28 * ARMv8 ARM reserves the following encoding for system registers:
29 * (Ref: ARMv8 ARM, Section: "System instruction class encoding overview",
30 * C5.2, version:ARM DDI 0487A.f)
31 * [20-19] : Op0
32 * [18-16] : Op1
33 * [15-12] : CRn
34 * [11-8] : CRm
35 * [7-5] : Op2
36 */
37 #define sys_reg(op0, op1, crn, crm, op2) \
38 ((((op0)&3)<<19)|((op1)<<16)|((crn)<<12)|((crm)<<8)|((op2)<<5))
39
40 #define SYS_MIDR_EL1 sys_reg(3, 0, 0, 0, 0)
41 #define SYS_MPIDR_EL1 sys_reg(3, 0, 0, 0, 5)
42 #define SYS_REVIDR_EL1 sys_reg(3, 0, 0, 0, 6)
43
44 #define SYS_ID_PFR0_EL1 sys_reg(3, 0, 0, 1, 0)
45 #define SYS_ID_PFR1_EL1 sys_reg(3, 0, 0, 1, 1)
46 #define SYS_ID_DFR0_EL1 sys_reg(3, 0, 0, 1, 2)
47 #define SYS_ID_MMFR0_EL1 sys_reg(3, 0, 0, 1, 4)
48 #define SYS_ID_MMFR1_EL1 sys_reg(3, 0, 0, 1, 5)
49 #define SYS_ID_MMFR2_EL1 sys_reg(3, 0, 0, 1, 6)
50 #define SYS_ID_MMFR3_EL1 sys_reg(3, 0, 0, 1, 7)
51
52 #define SYS_ID_ISAR0_EL1 sys_reg(3, 0, 0, 2, 0)
53 #define SYS_ID_ISAR1_EL1 sys_reg(3, 0, 0, 2, 1)
54 #define SYS_ID_ISAR2_EL1 sys_reg(3, 0, 0, 2, 2)
55 #define SYS_ID_ISAR3_EL1 sys_reg(3, 0, 0, 2, 3)
56 #define SYS_ID_ISAR4_EL1 sys_reg(3, 0, 0, 2, 4)
57 #define SYS_ID_ISAR5_EL1 sys_reg(3, 0, 0, 2, 5)
58 #define SYS_ID_MMFR4_EL1 sys_reg(3, 0, 0, 2, 6)
59
60 #define SYS_MVFR0_EL1 sys_reg(3, 0, 0, 3, 0)
61 #define SYS_MVFR1_EL1 sys_reg(3, 0, 0, 3, 1)
62 #define SYS_MVFR2_EL1 sys_reg(3, 0, 0, 3, 2)
63
64 #define SYS_ID_AA64PFR0_EL1 sys_reg(3, 0, 0, 4, 0)
65 #define SYS_ID_AA64PFR1_EL1 sys_reg(3, 0, 0, 4, 1)
66
67 #define SYS_ID_AA64DFR0_EL1 sys_reg(3, 0, 0, 5, 0)
68 #define SYS_ID_AA64DFR1_EL1 sys_reg(3, 0, 0, 5, 1)
69
70 #define SYS_ID_AA64ISAR0_EL1 sys_reg(3, 0, 0, 6, 0)
71 #define SYS_ID_AA64ISAR1_EL1 sys_reg(3, 0, 0, 6, 1)
72
73 #define SYS_ID_AA64MMFR0_EL1 sys_reg(3, 0, 0, 7, 0)
74 #define SYS_ID_AA64MMFR1_EL1 sys_reg(3, 0, 0, 7, 1)
75 #define SYS_ID_AA64MMFR2_EL1 sys_reg(3, 0, 0, 7, 2)
76
77 #define SYS_CNTFRQ_EL0 sys_reg(3, 3, 14, 0, 0)
78 #define SYS_CTR_EL0 sys_reg(3, 3, 0, 0, 1)
79 #define SYS_DCZID_EL0 sys_reg(3, 3, 0, 0, 7)
80
81 #define REG_PSTATE_PAN_IMM sys_reg(0, 0, 4, 0, 4)
82 #define REG_PSTATE_UAO_IMM sys_reg(0, 0, 4, 0, 3)
83
84 #define SET_PSTATE_PAN(x) __inst_arm(0xd5000000 | REG_PSTATE_PAN_IMM |\
85 (!!x)<<8 | 0x1f)
86 #define SET_PSTATE_UAO(x) __inst_arm(0xd5000000 | REG_PSTATE_UAO_IMM |\
87 (!!x)<<8 | 0x1f)
88
89 /* SCTLR_EL1 */
90 #define SCTLR_EL1_CP15BEN (0x1 << 5)
91 #define SCTLR_EL1_SED (0x1 << 8)
92 #define SCTLR_EL1_SPAN (0x1 << 23)
93
94
95 /* id_aa64isar0 */
96 #define ID_AA64ISAR0_RDM_SHIFT 28
97 #define ID_AA64ISAR0_ATOMICS_SHIFT 20
98 #define ID_AA64ISAR0_CRC32_SHIFT 16
99 #define ID_AA64ISAR0_SHA2_SHIFT 12
100 #define ID_AA64ISAR0_SHA1_SHIFT 8
101 #define ID_AA64ISAR0_AES_SHIFT 4
102
103 /* id_aa64pfr0 */
104 #define ID_AA64PFR0_GIC_SHIFT 24
105 #define ID_AA64PFR0_ASIMD_SHIFT 20
106 #define ID_AA64PFR0_FP_SHIFT 16
107 #define ID_AA64PFR0_EL3_SHIFT 12
108 #define ID_AA64PFR0_EL2_SHIFT 8
109 #define ID_AA64PFR0_EL1_SHIFT 4
110 #define ID_AA64PFR0_EL0_SHIFT 0
111
112 #define ID_AA64PFR0_FP_NI 0xf
113 #define ID_AA64PFR0_FP_SUPPORTED 0x0
114 #define ID_AA64PFR0_ASIMD_NI 0xf
115 #define ID_AA64PFR0_ASIMD_SUPPORTED 0x0
116 #define ID_AA64PFR0_EL1_64BIT_ONLY 0x1
117 #define ID_AA64PFR0_EL0_64BIT_ONLY 0x1
118 #define ID_AA64PFR0_EL0_32BIT_64BIT 0x2
119
120 /* id_aa64mmfr0 */
121 #define ID_AA64MMFR0_TGRAN4_SHIFT 28
122 #define ID_AA64MMFR0_TGRAN64_SHIFT 24
123 #define ID_AA64MMFR0_TGRAN16_SHIFT 20
124 #define ID_AA64MMFR0_BIGENDEL0_SHIFT 16
125 #define ID_AA64MMFR0_SNSMEM_SHIFT 12
126 #define ID_AA64MMFR0_BIGENDEL_SHIFT 8
127 #define ID_AA64MMFR0_ASID_SHIFT 4
128 #define ID_AA64MMFR0_PARANGE_SHIFT 0
129
130 #define ID_AA64MMFR0_TGRAN4_NI 0xf
131 #define ID_AA64MMFR0_TGRAN4_SUPPORTED 0x0
132 #define ID_AA64MMFR0_TGRAN64_NI 0xf
133 #define ID_AA64MMFR0_TGRAN64_SUPPORTED 0x0
134 #define ID_AA64MMFR0_TGRAN16_NI 0x0
135 #define ID_AA64MMFR0_TGRAN16_SUPPORTED 0x1
136
137 /* id_aa64mmfr1 */
138 #define ID_AA64MMFR1_PAN_SHIFT 20
139 #define ID_AA64MMFR1_LOR_SHIFT 16
140 #define ID_AA64MMFR1_HPD_SHIFT 12
141 #define ID_AA64MMFR1_VHE_SHIFT 8
142 #define ID_AA64MMFR1_VMIDBITS_SHIFT 4
143 #define ID_AA64MMFR1_HADBS_SHIFT 0
144
145 /* id_aa64mmfr2 */
146 #define ID_AA64MMFR2_UAO_SHIFT 4
147
148 /* id_aa64dfr0 */
149 #define ID_AA64DFR0_CTX_CMPS_SHIFT 28
150 #define ID_AA64DFR0_WRPS_SHIFT 20
151 #define ID_AA64DFR0_BRPS_SHIFT 12
152 #define ID_AA64DFR0_PMUVER_SHIFT 8
153 #define ID_AA64DFR0_TRACEVER_SHIFT 4
154 #define ID_AA64DFR0_DEBUGVER_SHIFT 0
155
156 #define ID_ISAR5_RDM_SHIFT 24
157 #define ID_ISAR5_CRC32_SHIFT 16
158 #define ID_ISAR5_SHA2_SHIFT 12
159 #define ID_ISAR5_SHA1_SHIFT 8
160 #define ID_ISAR5_AES_SHIFT 4
161 #define ID_ISAR5_SEVL_SHIFT 0
162
163 #define MVFR0_FPROUND_SHIFT 28
164 #define MVFR0_FPSHVEC_SHIFT 24
165 #define MVFR0_FPSQRT_SHIFT 20
166 #define MVFR0_FPDIVIDE_SHIFT 16
167 #define MVFR0_FPTRAP_SHIFT 12
168 #define MVFR0_FPDP_SHIFT 8
169 #define MVFR0_FPSP_SHIFT 4
170 #define MVFR0_SIMD_SHIFT 0
171
172 #define MVFR1_SIMDFMAC_SHIFT 28
173 #define MVFR1_FPHP_SHIFT 24
174 #define MVFR1_SIMDHP_SHIFT 20
175 #define MVFR1_SIMDSP_SHIFT 16
176 #define MVFR1_SIMDINT_SHIFT 12
177 #define MVFR1_SIMDLS_SHIFT 8
178 #define MVFR1_FPDNAN_SHIFT 4
179 #define MVFR1_FPFTZ_SHIFT 0
180
181
182 #define ID_AA64MMFR0_TGRAN4_SHIFT 28
183 #define ID_AA64MMFR0_TGRAN64_SHIFT 24
184 #define ID_AA64MMFR0_TGRAN16_SHIFT 20
185
186 #define ID_AA64MMFR0_TGRAN4_NI 0xf
187 #define ID_AA64MMFR0_TGRAN4_SUPPORTED 0x0
188 #define ID_AA64MMFR0_TGRAN64_NI 0xf
189 #define ID_AA64MMFR0_TGRAN64_SUPPORTED 0x0
190 #define ID_AA64MMFR0_TGRAN16_NI 0x0
191 #define ID_AA64MMFR0_TGRAN16_SUPPORTED 0x1
192
193 #if defined(CONFIG_ARM64_4K_PAGES)
194 #define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN4_SHIFT
195 #define ID_AA64MMFR0_TGRAN_SUPPORTED ID_AA64MMFR0_TGRAN4_SUPPORTED
196 #elif defined(CONFIG_ARM64_16K_PAGES)
197 #define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN16_SHIFT
198 #define ID_AA64MMFR0_TGRAN_SUPPORTED ID_AA64MMFR0_TGRAN16_SUPPORTED
199 #elif defined(CONFIG_ARM64_64K_PAGES)
200 #define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN64_SHIFT
201 #define ID_AA64MMFR0_TGRAN_SUPPORTED ID_AA64MMFR0_TGRAN64_SUPPORTED
202 #endif
203
204 #ifdef __ASSEMBLY__
205
206 .irp num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30
207 .equ .L__reg_num_x\num, \num
208 .endr
209 .equ .L__reg_num_xzr, 31
210
211 .macro mrs_s, rt, sreg
212 .inst 0xd5200000|(\sreg)|(.L__reg_num_\rt)
213 .endm
214
215 .macro msr_s, sreg, rt
216 .inst 0xd5000000|(\sreg)|(.L__reg_num_\rt)
217 .endm
218
219 #else
220
221 #include <linux/types.h>
222
223 asm(
224 " .irp num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30\n"
225 " .equ .L__reg_num_x\\num, \\num\n"
226 " .endr\n"
227 " .equ .L__reg_num_xzr, 31\n"
228 "\n"
229 " .macro mrs_s, rt, sreg\n"
230 " .inst 0xd5200000|(\\sreg)|(.L__reg_num_\\rt)\n"
231 " .endm\n"
232 "\n"
233 " .macro msr_s, sreg, rt\n"
234 " .inst 0xd5000000|(\\sreg)|(.L__reg_num_\\rt)\n"
235 " .endm\n"
236 );
237
config_sctlr_el1(u32 clear,u32 set)238 static inline void config_sctlr_el1(u32 clear, u32 set)
239 {
240 u32 val;
241
242 asm volatile("mrs %0, sctlr_el1" : "=r" (val));
243 val &= ~clear;
244 val |= set;
245 asm volatile("msr sctlr_el1, %0" : : "r" (val));
246 }
247
248 /*
249 * Unlike read_cpuid, calls to read_sysreg are never expected to be
250 * optimized away or replaced with synthetic values.
251 */
252 #define read_sysreg(r) ({ \
253 u64 __val; \
254 asm volatile("mrs %0, " __stringify(r) : "=r" (__val)); \
255 __val; \
256 })
257
258 #define write_sysreg(v, r) do { \
259 u64 __val = (u64)v; \
260 asm volatile("msr " __stringify(r) ", %0" \
261 : : "r" (__val)); \
262 } while (0)
263
264 #endif
265
266 #endif /* __ASM_SYSREG_H */
267