Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
plpar_wrappers.h
Go to the documentation of this file.
1 #ifndef _PSERIES_PLPAR_WRAPPERS_H
2 #define _PSERIES_PLPAR_WRAPPERS_H
3 
4 #include <linux/string.h>
5 
6 #include <asm/hvcall.h>
7 #include <asm/paca.h>
8 #include <asm/page.h>
9 
10 /* Get state of physical CPU from query_cpu_stopped */
11 int smp_query_cpu_stopped(unsigned int pcpu);
12 #define QCSS_STOPPED 0
13 #define QCSS_STOPPING 1
14 #define QCSS_NOT_STOPPED 2
15 #define QCSS_HARDWARE_ERROR -1
16 #define QCSS_HARDWARE_BUSY -2
17 
18 static inline long poll_pending(void)
19 {
20  return plpar_hcall_norets(H_POLL_PENDING);
21 }
22 
23 static inline u8 get_cede_latency_hint(void)
24 {
25  return get_lppaca()->cede_latency_hint;
26 }
27 
28 static inline void set_cede_latency_hint(u8 latency_hint)
29 {
30  get_lppaca()->cede_latency_hint = latency_hint;
31 }
32 
33 static inline long cede_processor(void)
34 {
35  return plpar_hcall_norets(H_CEDE);
36 }
37 
38 static inline long extended_cede_processor(unsigned long latency_hint)
39 {
40  long rc;
41  u8 old_latency_hint = get_cede_latency_hint();
42 
43  set_cede_latency_hint(latency_hint);
44  rc = cede_processor();
45  set_cede_latency_hint(old_latency_hint);
46 
47  return rc;
48 }
49 
50 static inline long vpa_call(unsigned long flags, unsigned long cpu,
51  unsigned long vpa)
52 {
53  /* flags are in bits 16-18 (counting from most significant bit) */
54  flags = flags << (63 - 18);
55 
56  return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa);
57 }
58 
59 static inline long unregister_vpa(unsigned long cpu)
60 {
61  return vpa_call(0x5, cpu, 0);
62 }
63 
64 static inline long register_vpa(unsigned long cpu, unsigned long vpa)
65 {
66  return vpa_call(0x1, cpu, vpa);
67 }
68 
69 static inline long unregister_slb_shadow(unsigned long cpu)
70 {
71  return vpa_call(0x7, cpu, 0);
72 }
73 
74 static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
75 {
76  return vpa_call(0x3, cpu, vpa);
77 }
78 
79 static inline long unregister_dtl(unsigned long cpu)
80 {
81  return vpa_call(0x6, cpu, 0);
82 }
83 
84 static inline long register_dtl(unsigned long cpu, unsigned long vpa)
85 {
86  return vpa_call(0x2, cpu, vpa);
87 }
88 
89 static inline long plpar_page_set_loaned(unsigned long vpa)
90 {
91  unsigned long cmo_page_sz = cmo_get_page_size();
92  long rc = 0;
93  int i;
94 
95  for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
96  rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa + i, 0);
97 
98  for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
99  plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE,
100  vpa + i - cmo_page_sz, 0);
101 
102  return rc;
103 }
104 
105 static inline long plpar_page_set_active(unsigned long vpa)
106 {
107  unsigned long cmo_page_sz = cmo_get_page_size();
108  long rc = 0;
109  int i;
110 
111  for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
112  rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa + i, 0);
113 
114  for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
115  plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED,
116  vpa + i - cmo_page_sz, 0);
117 
118  return rc;
119 }
120 
121 extern void vpa_init(int cpu);
122 
123 static inline long plpar_pte_enter(unsigned long flags,
124  unsigned long hpte_group, unsigned long hpte_v,
125  unsigned long hpte_r, unsigned long *slot)
126 {
127  long rc;
128  unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
129 
130  rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
131 
132  *slot = retbuf[0];
133 
134  return rc;
135 }
136 
137 static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
138  unsigned long avpn, unsigned long *old_pteh_ret,
139  unsigned long *old_ptel_ret)
140 {
141  long rc;
142  unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
143 
144  rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
145 
146  *old_pteh_ret = retbuf[0];
147  *old_ptel_ret = retbuf[1];
148 
149  return rc;
150 }
151 
152 /* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */
153 static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex,
154  unsigned long avpn, unsigned long *old_pteh_ret,
155  unsigned long *old_ptel_ret)
156 {
157  long rc;
158  unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
159 
160  rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn);
161 
162  *old_pteh_ret = retbuf[0];
163  *old_ptel_ret = retbuf[1];
164 
165  return rc;
166 }
167 
168 static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
169  unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
170 {
171  long rc;
172  unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
173 
174  rc = plpar_hcall(H_READ, retbuf, flags, ptex);
175 
176  *old_pteh_ret = retbuf[0];
177  *old_ptel_ret = retbuf[1];
178 
179  return rc;
180 }
181 
182 /* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */
183 static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
184  unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
185 {
186  long rc;
187  unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
188 
189  rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex);
190 
191  *old_pteh_ret = retbuf[0];
192  *old_ptel_ret = retbuf[1];
193 
194  return rc;
195 }
196 
197 /*
198  * plpar_pte_read_4_raw can be called in real mode.
199  * ptes must be 8*sizeof(unsigned long)
200  */
201 static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex,
202  unsigned long *ptes)
203 
204 {
205  long rc;
206  unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
207 
208  rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex);
209 
210  memcpy(ptes, retbuf, 8*sizeof(unsigned long));
211 
212  return rc;
213 }
214 
215 static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
216  unsigned long avpn)
217 {
218  return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
219 }
220 
221 static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
222  unsigned long *tce_ret)
223 {
224  long rc;
225  unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
226 
227  rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
228 
229  *tce_ret = retbuf[0];
230 
231  return rc;
232 }
233 
234 static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
235  unsigned long tceval)
236 {
237  return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
238 }
239 
240 static inline long plpar_tce_put_indirect(unsigned long liobn,
241  unsigned long ioba, unsigned long page, unsigned long count)
242 {
243  return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
244 }
245 
246 static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
247  unsigned long tceval, unsigned long count)
248 {
249  return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
250 }
251 
252 static inline long plpar_get_term_char(unsigned long termno,
253  unsigned long *len_ret, char *buf_ret)
254 {
255  long rc;
256  unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
257  unsigned long *lbuf = (unsigned long *)buf_ret; /* TODO: alignment? */
258 
259  rc = plpar_hcall(H_GET_TERM_CHAR, retbuf, termno);
260 
261  *len_ret = retbuf[0];
262  lbuf[0] = retbuf[1];
263  lbuf[1] = retbuf[2];
264 
265  return rc;
266 }
267 
268 static inline long plpar_put_term_char(unsigned long termno, unsigned long len,
269  const char *buffer)
270 {
271  unsigned long *lbuf = (unsigned long *)buffer; /* TODO: alignment? */
272  return plpar_hcall_norets(H_PUT_TERM_CHAR, termno, len, lbuf[0],
273  lbuf[1]);
274 }
275 
276 #endif /* _PSERIES_PLPAR_WRAPPERS_H */
Generated on Thu Jan 10 2013 13:15:56 for Linux Kernel by   doxygen 1.8.2