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1  /*
2   * Declarations for to Hexagon Virtal Machine.
3   *
4   * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
5   *
6   * This program is free software; you can redistribute it and/or modify
7   * it under the terms of the GNU General Public License version 2 and
8   * only version 2 as published by the Free Software Foundation.
9   *
10   * This program is distributed in the hope that it will be useful,
11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   * GNU General Public License for more details.
14   *
15   * You should have received a copy of the GNU General Public License
16   * along with this program; if not, write to the Free Software
17   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18   * 02110-1301, USA.
19   */
20  
21  #ifndef ASM_HEXAGON_VM_H
22  #define ASM_HEXAGON_VM_H
23  
24  /*
25   * In principle, a Linux kernel for the VM could
26   * selectively define the virtual instructions
27   * as inline assembler macros, but for a first pass,
28   * we'll use subroutines for both the VM and the native
29   * kernels.  It's costing a subroutine call/return,
30   * but it makes for a single set of entry points
31   * for tracing/debugging.
32   */
33  
34  #define HVM_TRAP1_VMVERSION		0
35  #define HVM_TRAP1_VMRTE			1
36  #define HVM_TRAP1_VMSETVEC		2
37  #define HVM_TRAP1_VMSETIE		3
38  #define HVM_TRAP1_VMGETIE		4
39  #define HVM_TRAP1_VMINTOP		5
40  #define HVM_TRAP1_VMCLRMAP		10
41  #define HVM_TRAP1_VMNEWMAP		11
42  #define HVM_TRAP1_FORMERLY_VMWIRE	12
43  #define HVM_TRAP1_VMCACHE		13
44  #define HVM_TRAP1_VMGETTIME		14
45  #define HVM_TRAP1_VMSETTIME		15
46  #define HVM_TRAP1_VMWAIT		16
47  #define HVM_TRAP1_VMYIELD		17
48  #define HVM_TRAP1_VMSTART		18
49  #define HVM_TRAP1_VMSTOP		19
50  #define HVM_TRAP1_VMVPID		20
51  #define HVM_TRAP1_VMSETREGS		21
52  #define HVM_TRAP1_VMGETREGS		22
53  #define HVM_TRAP1_VMTIMEROP		24
54  
55  #ifndef __ASSEMBLY__
56  
57  enum VM_CACHE_OPS {
58  	hvmc_ickill,
59  	hvmc_dckill,
60  	hvmc_l2kill,
61  	hvmc_dccleaninva,
62  	hvmc_icinva,
63  	hvmc_idsync,
64  	hvmc_fetch_cfg
65  };
66  
67  enum VM_INT_OPS {
68  	hvmi_nop,
69  	hvmi_globen,
70  	hvmi_globdis,
71  	hvmi_locen,
72  	hvmi_locdis,
73  	hvmi_affinity,
74  	hvmi_get,
75  	hvmi_peek,
76  	hvmi_status,
77  	hvmi_post,
78  	hvmi_clear
79  };
80  
81  extern void _K_VM_event_vector(void);
82  
83  void __vmrte(void);
84  long __vmsetvec(void *);
85  long __vmsetie(long);
86  long __vmgetie(void);
87  long __vmintop(enum VM_INT_OPS, long, long, long, long);
88  long __vmclrmap(void *, unsigned long);
89  long __vmnewmap(void *);
90  long __vmcache(enum VM_CACHE_OPS op, unsigned long addr, unsigned long len);
91  unsigned long long __vmgettime(void);
92  long __vmsettime(unsigned long long);
93  long __vmstart(void *, void *);
94  void __vmstop(void);
95  long __vmwait(void);
96  void __vmyield(void);
97  long __vmvpid(void);
98  
__vmcache_ickill(void)99  static inline long __vmcache_ickill(void)
100  {
101  	return __vmcache(hvmc_ickill, 0, 0);
102  }
103  
__vmcache_dckill(void)104  static inline long __vmcache_dckill(void)
105  {
106  	return __vmcache(hvmc_dckill, 0, 0);
107  }
108  
__vmcache_l2kill(void)109  static inline long __vmcache_l2kill(void)
110  {
111  	return __vmcache(hvmc_l2kill, 0, 0);
112  }
113  
__vmcache_dccleaninva(unsigned long addr,unsigned long len)114  static inline long __vmcache_dccleaninva(unsigned long addr, unsigned long len)
115  {
116  	return __vmcache(hvmc_dccleaninva, addr, len);
117  }
118  
__vmcache_icinva(unsigned long addr,unsigned long len)119  static inline long __vmcache_icinva(unsigned long addr, unsigned long len)
120  {
121  	return __vmcache(hvmc_icinva, addr, len);
122  }
123  
__vmcache_idsync(unsigned long addr,unsigned long len)124  static inline long __vmcache_idsync(unsigned long addr,
125  					   unsigned long len)
126  {
127  	return __vmcache(hvmc_idsync, addr, len);
128  }
129  
__vmcache_fetch_cfg(unsigned long val)130  static inline long __vmcache_fetch_cfg(unsigned long val)
131  {
132  	return __vmcache(hvmc_fetch_cfg, val, 0);
133  }
134  
135  /* interrupt operations  */
136  
__vmintop_nop(void)137  static inline long __vmintop_nop(void)
138  {
139  	return __vmintop(hvmi_nop, 0, 0, 0, 0);
140  }
141  
__vmintop_globen(long i)142  static inline long __vmintop_globen(long i)
143  {
144  	return __vmintop(hvmi_globen, i, 0, 0, 0);
145  }
146  
__vmintop_globdis(long i)147  static inline long __vmintop_globdis(long i)
148  {
149  	return __vmintop(hvmi_globdis, i, 0, 0, 0);
150  }
151  
__vmintop_locen(long i)152  static inline long __vmintop_locen(long i)
153  {
154  	return __vmintop(hvmi_locen, i, 0, 0, 0);
155  }
156  
__vmintop_locdis(long i)157  static inline long __vmintop_locdis(long i)
158  {
159  	return __vmintop(hvmi_locdis, i, 0, 0, 0);
160  }
161  
__vmintop_affinity(long i,long cpu)162  static inline long __vmintop_affinity(long i, long cpu)
163  {
164  	return __vmintop(hvmi_affinity, i, cpu, 0, 0);
165  }
166  
__vmintop_get(void)167  static inline long __vmintop_get(void)
168  {
169  	return __vmintop(hvmi_get, 0, 0, 0, 0);
170  }
171  
__vmintop_peek(void)172  static inline long __vmintop_peek(void)
173  {
174  	return __vmintop(hvmi_peek, 0, 0, 0, 0);
175  }
176  
__vmintop_status(long i)177  static inline long __vmintop_status(long i)
178  {
179  	return __vmintop(hvmi_status, i, 0, 0, 0);
180  }
181  
__vmintop_post(long i)182  static inline long __vmintop_post(long i)
183  {
184  	return __vmintop(hvmi_post, i, 0, 0, 0);
185  }
186  
__vmintop_clear(long i)187  static inline long __vmintop_clear(long i)
188  {
189  	return __vmintop(hvmi_clear, i, 0, 0, 0);
190  }
191  
192  #else /* Only assembly code should reference these */
193  
194  #endif /* __ASSEMBLY__ */
195  
196  /*
197   * Constants for virtual instruction parameters and return values
198   */
199  
200  /* vmnewmap arguments */
201  
202  #define VM_TRANS_TYPE_LINEAR 0
203  #define VM_TRANS_TYPE_TABLE 1
204  #define VM_TLB_INVALIDATE_FALSE 0
205  #define VM_TLB_INVALIDATE_TRUE 1
206  
207  /* vmsetie arguments */
208  
209  #define VM_INT_DISABLE	0
210  #define VM_INT_ENABLE	1
211  
212  /* vmsetimask arguments */
213  
214  #define VM_INT_UNMASK	0
215  #define VM_INT_MASK	1
216  
217  #define VM_NEWMAP_TYPE_LINEAR	0
218  #define VM_NEWMAP_TYPE_PGTABLES	1
219  
220  
221  /*
222   * Event Record definitions useful to both C and Assembler
223   */
224  
225  /* VMEST Layout */
226  
227  #define HVM_VMEST_UM_SFT	31
228  #define HVM_VMEST_UM_MSK	1
229  #define HVM_VMEST_IE_SFT	30
230  #define HVM_VMEST_IE_MSK	1
231  #define HVM_VMEST_SS_SFT	29
232  #define HVM_VMEST_SS_MSK	1
233  #define HVM_VMEST_EVENTNUM_SFT	16
234  #define HVM_VMEST_EVENTNUM_MSK	0xff
235  #define HVM_VMEST_CAUSE_SFT	0
236  #define HVM_VMEST_CAUSE_MSK	0xffff
237  
238  /*
239   * The initial program gets to find a system environment descriptor
240   * on its stack when it begins exection. The first word is a version
241   * code to indicate what is there.  Zero means nothing more.
242   */
243  
244  #define HEXAGON_VM_SED_NULL	0
245  
246  /*
247   * Event numbers for vector binding
248   */
249  
250  #define HVM_EV_RESET		0
251  #define HVM_EV_MACHCHECK	1
252  #define HVM_EV_GENEX		2
253  #define HVM_EV_TRAP		8
254  #define HVM_EV_INTR		15
255  /* These shoud be nuked as soon as we know the VM is up to spec v0.1.1 */
256  #define HVM_EV_INTR_0		16
257  #define HVM_MAX_INTR		240
258  
259  /*
260   * Cause values for General Exception
261   */
262  
263  #define HVM_GE_C_BUS	0x01
264  #define HVM_GE_C_XPROT	0x11
265  #define HVM_GE_C_XUSER	0x14
266  #define HVM_GE_C_INVI	0x15
267  #define HVM_GE_C_PRIVI	0x1B
268  #define HVM_GE_C_XMAL	0x1C
269  #define HVM_GE_C_WREG	0x1D
270  #define HVM_GE_C_PCAL	0x1E
271  #define HVM_GE_C_RMAL	0x20
272  #define HVM_GE_C_WMAL	0x21
273  #define HVM_GE_C_RPROT	0x22
274  #define HVM_GE_C_WPROT	0x23
275  #define HVM_GE_C_RUSER	0x24
276  #define HVM_GE_C_WUSER	0x25
277  #define HVM_GE_C_CACHE	0x28
278  
279  /*
280   * Cause codes for Machine Check
281   */
282  
283  #define	HVM_MCHK_C_DOWN		0x00
284  #define	HVM_MCHK_C_BADSP	0x01
285  #define	HVM_MCHK_C_BADEX	0x02
286  #define	HVM_MCHK_C_BADPT	0x03
287  #define	HVM_MCHK_C_REGWR	0x29
288  
289  #endif
290