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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Declarations for to Hexagon Virtal Machine.
4 *
5 * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
6 */
7
8#ifndef ASM_HEXAGON_VM_H
9#define ASM_HEXAGON_VM_H
10
11/*
12 * In principle, a Linux kernel for the VM could
13 * selectively define the virtual instructions
14 * as inline assembler macros, but for a first pass,
15 * we'll use subroutines for both the VM and the native
16 * kernels. It's costing a subroutine call/return,
17 * but it makes for a single set of entry points
18 * for tracing/debugging.
19 */
20
21#define HVM_TRAP1_VMVERSION 0
22#define HVM_TRAP1_VMRTE 1
23#define HVM_TRAP1_VMSETVEC 2
24#define HVM_TRAP1_VMSETIE 3
25#define HVM_TRAP1_VMGETIE 4
26#define HVM_TRAP1_VMINTOP 5
27#define HVM_TRAP1_VMCLRMAP 10
28#define HVM_TRAP1_VMNEWMAP 11
29#define HVM_TRAP1_FORMERLY_VMWIRE 12
30#define HVM_TRAP1_VMCACHE 13
31#define HVM_TRAP1_VMGETTIME 14
32#define HVM_TRAP1_VMSETTIME 15
33#define HVM_TRAP1_VMWAIT 16
34#define HVM_TRAP1_VMYIELD 17
35#define HVM_TRAP1_VMSTART 18
36#define HVM_TRAP1_VMSTOP 19
37#define HVM_TRAP1_VMVPID 20
38#define HVM_TRAP1_VMSETREGS 21
39#define HVM_TRAP1_VMGETREGS 22
40#define HVM_TRAP1_VMTIMEROP 24
41
42#ifndef __ASSEMBLY__
43
44enum VM_CACHE_OPS {
45 hvmc_ickill,
46 hvmc_dckill,
47 hvmc_l2kill,
48 hvmc_dccleaninva,
49 hvmc_icinva,
50 hvmc_idsync,
51 hvmc_fetch_cfg
52};
53
54enum VM_INT_OPS {
55 hvmi_nop,
56 hvmi_globen,
57 hvmi_globdis,
58 hvmi_locen,
59 hvmi_locdis,
60 hvmi_affinity,
61 hvmi_get,
62 hvmi_peek,
63 hvmi_status,
64 hvmi_post,
65 hvmi_clear
66};
67
68extern void _K_VM_event_vector(void);
69
70void __vmrte(void);
71long __vmsetvec(void *);
72long __vmsetie(long);
73long __vmgetie(void);
74long __vmintop(enum VM_INT_OPS, long, long, long, long);
75long __vmclrmap(void *, unsigned long);
76long __vmnewmap(void *);
77long __vmcache(enum VM_CACHE_OPS op, unsigned long addr, unsigned long len);
78unsigned long long __vmgettime(void);
79long __vmsettime(unsigned long long);
80long __vmstart(void *, void *);
81void __vmstop(void);
82long __vmwait(void);
83void __vmyield(void);
84long __vmvpid(void);
85
86static inline long __vmcache_ickill(void)
87{
88 return __vmcache(hvmc_ickill, 0, 0);
89}
90
91static inline long __vmcache_dckill(void)
92{
93 return __vmcache(hvmc_dckill, 0, 0);
94}
95
96static inline long __vmcache_l2kill(void)
97{
98 return __vmcache(hvmc_l2kill, 0, 0);
99}
100
101static inline long __vmcache_dccleaninva(unsigned long addr, unsigned long len)
102{
103 return __vmcache(hvmc_dccleaninva, addr, len);
104}
105
106static inline long __vmcache_icinva(unsigned long addr, unsigned long len)
107{
108 return __vmcache(hvmc_icinva, addr, len);
109}
110
111static inline long __vmcache_idsync(unsigned long addr,
112 unsigned long len)
113{
114 return __vmcache(hvmc_idsync, addr, len);
115}
116
117static inline long __vmcache_fetch_cfg(unsigned long val)
118{
119 return __vmcache(hvmc_fetch_cfg, val, 0);
120}
121
122/* interrupt operations */
123
124static inline long __vmintop_nop(void)
125{
126 return __vmintop(hvmi_nop, 0, 0, 0, 0);
127}
128
129static inline long __vmintop_globen(long i)
130{
131 return __vmintop(hvmi_globen, i, 0, 0, 0);
132}
133
134static inline long __vmintop_globdis(long i)
135{
136 return __vmintop(hvmi_globdis, i, 0, 0, 0);
137}
138
139static inline long __vmintop_locen(long i)
140{
141 return __vmintop(hvmi_locen, i, 0, 0, 0);
142}
143
144static inline long __vmintop_locdis(long i)
145{
146 return __vmintop(hvmi_locdis, i, 0, 0, 0);
147}
148
149static inline long __vmintop_affinity(long i, long cpu)
150{
151 return __vmintop(hvmi_affinity, i, cpu, 0, 0);
152}
153
154static inline long __vmintop_get(void)
155{
156 return __vmintop(hvmi_get, 0, 0, 0, 0);
157}
158
159static inline long __vmintop_peek(void)
160{
161 return __vmintop(hvmi_peek, 0, 0, 0, 0);
162}
163
164static inline long __vmintop_status(long i)
165{
166 return __vmintop(hvmi_status, i, 0, 0, 0);
167}
168
169static inline long __vmintop_post(long i)
170{
171 return __vmintop(hvmi_post, i, 0, 0, 0);
172}
173
174static inline long __vmintop_clear(long i)
175{
176 return __vmintop(hvmi_clear, i, 0, 0, 0);
177}
178
179#else /* Only assembly code should reference these */
180
181#endif /* __ASSEMBLY__ */
182
183/*
184 * Constants for virtual instruction parameters and return values
185 */
186
187/* vmnewmap arguments */
188
189#define VM_TRANS_TYPE_LINEAR 0
190#define VM_TRANS_TYPE_TABLE 1
191#define VM_TLB_INVALIDATE_FALSE 0
192#define VM_TLB_INVALIDATE_TRUE 1
193
194/* vmsetie arguments */
195
196#define VM_INT_DISABLE 0
197#define VM_INT_ENABLE 1
198
199/* vmsetimask arguments */
200
201#define VM_INT_UNMASK 0
202#define VM_INT_MASK 1
203
204#define VM_NEWMAP_TYPE_LINEAR 0
205#define VM_NEWMAP_TYPE_PGTABLES 1
206
207
208/*
209 * Event Record definitions useful to both C and Assembler
210 */
211
212/* VMEST Layout */
213
214#define HVM_VMEST_UM_SFT 31
215#define HVM_VMEST_UM_MSK 1
216#define HVM_VMEST_IE_SFT 30
217#define HVM_VMEST_IE_MSK 1
218#define HVM_VMEST_SS_SFT 29
219#define HVM_VMEST_SS_MSK 1
220#define HVM_VMEST_EVENTNUM_SFT 16
221#define HVM_VMEST_EVENTNUM_MSK 0xff
222#define HVM_VMEST_CAUSE_SFT 0
223#define HVM_VMEST_CAUSE_MSK 0xffff
224
225/*
226 * The initial program gets to find a system environment descriptor
227 * on its stack when it begins execution. The first word is a version
228 * code to indicate what is there. Zero means nothing more.
229 */
230
231#define HEXAGON_VM_SED_NULL 0
232
233/*
234 * Event numbers for vector binding
235 */
236
237#define HVM_EV_RESET 0
238#define HVM_EV_MACHCHECK 1
239#define HVM_EV_GENEX 2
240#define HVM_EV_TRAP 8
241#define HVM_EV_INTR 15
242/* These shoud be nuked as soon as we know the VM is up to spec v0.1.1 */
243#define HVM_EV_INTR_0 16
244#define HVM_MAX_INTR 240
245
246/*
247 * Cause values for General Exception
248 */
249
250#define HVM_GE_C_BUS 0x01
251#define HVM_GE_C_XPROT 0x11
252#define HVM_GE_C_XUSER 0x14
253#define HVM_GE_C_INVI 0x15
254#define HVM_GE_C_PRIVI 0x1B
255#define HVM_GE_C_XMAL 0x1C
256#define HVM_GE_C_WREG 0x1D
257#define HVM_GE_C_PCAL 0x1E
258#define HVM_GE_C_RMAL 0x20
259#define HVM_GE_C_WMAL 0x21
260#define HVM_GE_C_RPROT 0x22
261#define HVM_GE_C_WPROT 0x23
262#define HVM_GE_C_RUSER 0x24
263#define HVM_GE_C_WUSER 0x25
264#define HVM_GE_C_CACHE 0x28
265
266/*
267 * Cause codes for Machine Check
268 */
269
270#define HVM_MCHK_C_DOWN 0x00
271#define HVM_MCHK_C_BADSP 0x01
272#define HVM_MCHK_C_BADEX 0x02
273#define HVM_MCHK_C_BADPT 0x03
274#define HVM_MCHK_C_REGWR 0x29
275
276#endif
277

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source code of linux/arch/hexagon/include/asm/hexagon_vm.h