1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2015 Regents of the University of California
6 #ifndef _ASM_RISCV_CSR_H
7 #define _ASM_RISCV_CSR_H
10 #include <linux/const.h>
12 /* Status register flags */
13 #define SR_SIE _AC(0x00000002, UL) /* Supervisor Interrupt Enable */
14 #define SR_MIE _AC(0x00000008, UL) /* Machine Interrupt Enable */
15 #define SR_SPIE _AC(0x00000020, UL) /* Previous Supervisor IE */
16 #define SR_MPIE _AC(0x00000080, UL) /* Previous Machine IE */
17 #define SR_SPP _AC(0x00000100, UL) /* Previously Supervisor */
18 #define SR_MPP _AC(0x00001800, UL) /* Previously Machine */
19 #define SR_SUM _AC(0x00040000, UL) /* Supervisor User Memory Access */
21 #define SR_FS _AC(0x00006000, UL) /* Floating-point Status */
22 #define SR_FS_OFF _AC(0x00000000, UL)
23 #define SR_FS_INITIAL _AC(0x00002000, UL)
24 #define SR_FS_CLEAN _AC(0x00004000, UL)
25 #define SR_FS_DIRTY _AC(0x00006000, UL)
27 #define SR_XS _AC(0x00018000, UL) /* Extension Status */
28 #define SR_XS_OFF _AC(0x00000000, UL)
29 #define SR_XS_INITIAL _AC(0x00008000, UL)
30 #define SR_XS_CLEAN _AC(0x00010000, UL)
31 #define SR_XS_DIRTY _AC(0x00018000, UL)
34 #define SR_SD _AC(0x80000000, UL) /* FS/XS dirty */
36 #define SR_SD _AC(0x8000000000000000, UL) /* FS/XS dirty */
41 #define SATP_PPN _AC(0x003FFFFF, UL)
42 #define SATP_MODE_32 _AC(0x80000000, UL)
43 #define SATP_ASID_BITS 9
44 #define SATP_ASID_SHIFT 22
45 #define SATP_ASID_MASK _AC(0x1FF, UL)
47 #define SATP_PPN _AC(0x00000FFFFFFFFFFF, UL)
48 #define SATP_MODE_39 _AC(0x8000000000000000, UL)
49 #define SATP_MODE_48 _AC(0x9000000000000000, UL)
50 #define SATP_ASID_BITS 16
51 #define SATP_ASID_SHIFT 44
52 #define SATP_ASID_MASK _AC(0xFFFF, UL)
55 /* Exception cause high bit - is an interrupt if set */
56 #define CAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1))
58 /* Interrupt causes (minus the high bit) */
63 #define IRQ_VS_TIMER 6
69 /* Exception causes */
70 #define EXC_INST_MISALIGNED 0
71 #define EXC_INST_ACCESS 1
72 #define EXC_INST_ILLEGAL 2
73 #define EXC_BREAKPOINT 3
74 #define EXC_LOAD_ACCESS 5
75 #define EXC_STORE_ACCESS 7
77 #define EXC_HYPERVISOR_SYSCALL 9
78 #define EXC_SUPERVISOR_SYSCALL 10
79 #define EXC_INST_PAGE_FAULT 12
80 #define EXC_LOAD_PAGE_FAULT 13
81 #define EXC_STORE_PAGE_FAULT 15
82 #define EXC_INST_GUEST_PAGE_FAULT 20
83 #define EXC_LOAD_GUEST_PAGE_FAULT 21
84 #define EXC_VIRTUAL_INST_FAULT 22
85 #define EXC_STORE_GUEST_PAGE_FAULT 23
87 /* PMP configuration */
92 #define PMP_A_TOR 0x08
93 #define PMP_A_NA4 0x10
94 #define PMP_A_NAPOT 0x18
99 #define HSTATUS_VSXL _AC(0x300000000, UL)
100 #define HSTATUS_VSXL_SHIFT 32
102 #define HSTATUS_VTSR _AC(0x00400000, UL)
103 #define HSTATUS_VTW _AC(0x00200000, UL)
104 #define HSTATUS_VTVM _AC(0x00100000, UL)
105 #define HSTATUS_VGEIN _AC(0x0003f000, UL)
106 #define HSTATUS_VGEIN_SHIFT 12
107 #define HSTATUS_HU _AC(0x00000200, UL)
108 #define HSTATUS_SPVP _AC(0x00000100, UL)
109 #define HSTATUS_SPV _AC(0x00000080, UL)
110 #define HSTATUS_GVA _AC(0x00000040, UL)
111 #define HSTATUS_VSBE _AC(0x00000020, UL)
114 #define HGATP_MODE_OFF _AC(0, UL)
115 #define HGATP_MODE_SV32X4 _AC(1, UL)
116 #define HGATP_MODE_SV39X4 _AC(8, UL)
117 #define HGATP_MODE_SV48X4 _AC(9, UL)
119 #define HGATP32_MODE_SHIFT 31
120 #define HGATP32_VMID_SHIFT 22
121 #define HGATP32_VMID_MASK _AC(0x1FC00000, UL)
122 #define HGATP32_PPN _AC(0x003FFFFF, UL)
124 #define HGATP64_MODE_SHIFT 60
125 #define HGATP64_VMID_SHIFT 44
126 #define HGATP64_VMID_MASK _AC(0x03FFF00000000000, UL)
127 #define HGATP64_PPN _AC(0x00000FFFFFFFFFFF, UL)
129 #define HGATP_PAGE_SHIFT 12
132 #define HGATP_PPN HGATP64_PPN
133 #define HGATP_VMID_SHIFT HGATP64_VMID_SHIFT
134 #define HGATP_VMID_MASK HGATP64_VMID_MASK
135 #define HGATP_MODE_SHIFT HGATP64_MODE_SHIFT
137 #define HGATP_PPN HGATP32_PPN
138 #define HGATP_VMID_SHIFT HGATP32_VMID_SHIFT
139 #define HGATP_VMID_MASK HGATP32_VMID_MASK
140 #define HGATP_MODE_SHIFT HGATP32_MODE_SHIFT
143 /* VSIP & HVIP relation */
144 #define VSIP_TO_HVIP_SHIFT (IRQ_VS_SOFT - IRQ_S_SOFT)
145 #define VSIP_VALID_MASK ((_AC(1, UL) << IRQ_S_SOFT) | \
146 (_AC(1, UL) << IRQ_S_TIMER) | \
147 (_AC(1, UL) << IRQ_S_EXT))
149 /* symbolic CSR names: */
150 #define CSR_CYCLE 0xc00
151 #define CSR_TIME 0xc01
152 #define CSR_INSTRET 0xc02
153 #define CSR_CYCLEH 0xc80
154 #define CSR_TIMEH 0xc81
155 #define CSR_INSTRETH 0xc82
157 #define CSR_SSTATUS 0x100
158 #define CSR_SIE 0x104
159 #define CSR_STVEC 0x105
160 #define CSR_SCOUNTEREN 0x106
161 #define CSR_SSCRATCH 0x140
162 #define CSR_SEPC 0x141
163 #define CSR_SCAUSE 0x142
164 #define CSR_STVAL 0x143
165 #define CSR_SIP 0x144
166 #define CSR_SATP 0x180
168 #define CSR_VSSTATUS 0x200
169 #define CSR_VSIE 0x204
170 #define CSR_VSTVEC 0x205
171 #define CSR_VSSCRATCH 0x240
172 #define CSR_VSEPC 0x241
173 #define CSR_VSCAUSE 0x242
174 #define CSR_VSTVAL 0x243
175 #define CSR_VSIP 0x244
176 #define CSR_VSATP 0x280
178 #define CSR_HSTATUS 0x600
179 #define CSR_HEDELEG 0x602
180 #define CSR_HIDELEG 0x603
181 #define CSR_HIE 0x604
182 #define CSR_HTIMEDELTA 0x605
183 #define CSR_HCOUNTEREN 0x606
184 #define CSR_HGEIE 0x607
185 #define CSR_HTIMEDELTAH 0x615
186 #define CSR_HTVAL 0x643
187 #define CSR_HIP 0x644
188 #define CSR_HVIP 0x645
189 #define CSR_HTINST 0x64a
190 #define CSR_HGATP 0x680
191 #define CSR_HGEIP 0xe12
193 #define CSR_MSTATUS 0x300
194 #define CSR_MISA 0x301
195 #define CSR_MIE 0x304
196 #define CSR_MTVEC 0x305
197 #define CSR_MSCRATCH 0x340
198 #define CSR_MEPC 0x341
199 #define CSR_MCAUSE 0x342
200 #define CSR_MTVAL 0x343
201 #define CSR_MIP 0x344
202 #define CSR_PMPCFG0 0x3a0
203 #define CSR_PMPADDR0 0x3b0
204 #define CSR_MVENDORID 0xf11
205 #define CSR_MARCHID 0xf12
206 #define CSR_MIMPID 0xf13
207 #define CSR_MHARTID 0xf14
209 #ifdef CONFIG_RISCV_M_MODE
210 # define CSR_STATUS CSR_MSTATUS
211 # define CSR_IE CSR_MIE
212 # define CSR_TVEC CSR_MTVEC
213 # define CSR_SCRATCH CSR_MSCRATCH
214 # define CSR_EPC CSR_MEPC
215 # define CSR_CAUSE CSR_MCAUSE
216 # define CSR_TVAL CSR_MTVAL
217 # define CSR_IP CSR_MIP
219 # define SR_IE SR_MIE
220 # define SR_PIE SR_MPIE
221 # define SR_PP SR_MPP
223 # define RV_IRQ_SOFT IRQ_M_SOFT
224 # define RV_IRQ_TIMER IRQ_M_TIMER
225 # define RV_IRQ_EXT IRQ_M_EXT
226 #else /* CONFIG_RISCV_M_MODE */
227 # define CSR_STATUS CSR_SSTATUS
228 # define CSR_IE CSR_SIE
229 # define CSR_TVEC CSR_STVEC
230 # define CSR_SCRATCH CSR_SSCRATCH
231 # define CSR_EPC CSR_SEPC
232 # define CSR_CAUSE CSR_SCAUSE
233 # define CSR_TVAL CSR_STVAL
234 # define CSR_IP CSR_SIP
236 # define SR_IE SR_SIE
237 # define SR_PIE SR_SPIE
238 # define SR_PP SR_SPP
240 # define RV_IRQ_SOFT IRQ_S_SOFT
241 # define RV_IRQ_TIMER IRQ_S_TIMER
242 # define RV_IRQ_EXT IRQ_S_EXT
243 #endif /* CONFIG_RISCV_M_MODE */
245 /* IE/IP (Supervisor/Machine Interrupt Enable/Pending) flags */
246 #define IE_SIE (_AC(0x1, UL) << RV_IRQ_SOFT)
247 #define IE_TIE (_AC(0x1, UL) << RV_IRQ_TIMER)
248 #define IE_EIE (_AC(0x1, UL) << RV_IRQ_EXT)
252 #define csr_swap(csr, val) \
254 unsigned long __v = (unsigned long)(val); \
255 __asm__ __volatile__ ("csrrw %0, " __ASM_STR(csr) ", %1"\
256 : "=r" (__v) : "rK" (__v) \
261 #define csr_read(csr) \
263 register unsigned long __v; \
264 __asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) \
270 #define csr_write(csr, val) \
272 unsigned long __v = (unsigned long)(val); \
273 __asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0" \
278 #define csr_read_set(csr, val) \
280 unsigned long __v = (unsigned long)(val); \
281 __asm__ __volatile__ ("csrrs %0, " __ASM_STR(csr) ", %1"\
282 : "=r" (__v) : "rK" (__v) \
287 #define csr_set(csr, val) \
289 unsigned long __v = (unsigned long)(val); \
290 __asm__ __volatile__ ("csrs " __ASM_STR(csr) ", %0" \
295 #define csr_read_clear(csr, val) \
297 unsigned long __v = (unsigned long)(val); \
298 __asm__ __volatile__ ("csrrc %0, " __ASM_STR(csr) ", %1"\
299 : "=r" (__v) : "rK" (__v) \
304 #define csr_clear(csr, val) \
306 unsigned long __v = (unsigned long)(val); \
307 __asm__ __volatile__ ("csrc " __ASM_STR(csr) ", %0" \
312 #endif /* __ASSEMBLY__ */
314 #endif /* _ASM_RISCV_CSR_H */