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
poll_pending(void)18 static inline long poll_pending(void)
19 {
20 return plpar_hcall_norets(H_POLL_PENDING);
21 }
22
get_cede_latency_hint(void)23 static inline u8 get_cede_latency_hint(void)
24 {
25 return get_lppaca()->gpr5_dword.fields.cede_latency_hint;
26 }
27
set_cede_latency_hint(u8 latency_hint)28 static inline void set_cede_latency_hint(u8 latency_hint)
29 {
30 get_lppaca()->gpr5_dword.fields.cede_latency_hint = latency_hint;
31 }
32
cede_processor(void)33 static inline long cede_processor(void)
34 {
35 return plpar_hcall_norets(H_CEDE);
36 }
37
extended_cede_processor(unsigned long latency_hint)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
vpa_call(unsigned long flags,unsigned long cpu,unsigned long vpa)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
unregister_vpa(unsigned long cpu)59 static inline long unregister_vpa(unsigned long cpu)
60 {
61 return vpa_call(0x5, cpu, 0);
62 }
63
register_vpa(unsigned long cpu,unsigned long vpa)64 static inline long register_vpa(unsigned long cpu, unsigned long vpa)
65 {
66 return vpa_call(0x1, cpu, vpa);
67 }
68
unregister_slb_shadow(unsigned long cpu)69 static inline long unregister_slb_shadow(unsigned long cpu)
70 {
71 return vpa_call(0x7, cpu, 0);
72 }
73
register_slb_shadow(unsigned long cpu,unsigned long vpa)74 static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
75 {
76 return vpa_call(0x3, cpu, vpa);
77 }
78
unregister_dtl(unsigned long cpu)79 static inline long unregister_dtl(unsigned long cpu)
80 {
81 return vpa_call(0x6, cpu, 0);
82 }
83
register_dtl(unsigned long cpu,unsigned long vpa)84 static inline long register_dtl(unsigned long cpu, unsigned long vpa)
85 {
86 return vpa_call(0x2, cpu, vpa);
87 }
88
plpar_page_set_loaned(unsigned long vpa)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
plpar_page_set_active(unsigned long vpa)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
plpar_pte_enter(unsigned long flags,unsigned long hpte_group,unsigned long hpte_v,unsigned long hpte_r,unsigned long * slot)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
plpar_pte_remove(unsigned long flags,unsigned long ptex,unsigned long avpn,unsigned long * old_pteh_ret,unsigned long * old_ptel_ret)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 */
plpar_pte_remove_raw(unsigned long flags,unsigned long ptex,unsigned long avpn,unsigned long * old_pteh_ret,unsigned long * old_ptel_ret)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
plpar_pte_read(unsigned long flags,unsigned long ptex,unsigned long * old_pteh_ret,unsigned long * old_ptel_ret)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 */
plpar_pte_read_raw(unsigned long flags,unsigned long ptex,unsigned long * old_pteh_ret,unsigned long * old_ptel_ret)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 */
plpar_pte_read_4_raw(unsigned long flags,unsigned long ptex,unsigned long * ptes)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
plpar_pte_protect(unsigned long flags,unsigned long ptex,unsigned long avpn)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
plpar_tce_get(unsigned long liobn,unsigned long ioba,unsigned long * tce_ret)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
plpar_tce_put(unsigned long liobn,unsigned long ioba,unsigned long tceval)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
plpar_tce_put_indirect(unsigned long liobn,unsigned long ioba,unsigned long page,unsigned long count)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
plpar_tce_stuff(unsigned long liobn,unsigned long ioba,unsigned long tceval,unsigned long count)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
plpar_get_term_char(unsigned long termno,unsigned long * len_ret,char * buf_ret)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
plpar_put_term_char(unsigned long termno,unsigned long len,const char * buffer)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 */
277