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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
11int 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
18static inline long poll_pending(void)
19{
20 return plpar_hcall_norets(H_POLL_PENDING);
21}
22
23static inline u8 get_cede_latency_hint(void)
24{
25 return get_lppaca()->cede_latency_hint;
26}
27
28static inline void set_cede_latency_hint(u8 latency_hint)
29{
30 get_lppaca()->cede_latency_hint = latency_hint;
31}
32
33static inline long cede_processor(void)
34{
35 return plpar_hcall_norets(H_CEDE);
36}
37
38static 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
50static 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
59static inline long unregister_vpa(unsigned long cpu)
60{
61 return vpa_call(0x5, cpu, 0);
62}
63
64static inline long register_vpa(unsigned long cpu, unsigned long vpa)
65{
66 return vpa_call(0x1, cpu, vpa);
67}
68
69static inline long unregister_slb_shadow(unsigned long cpu)
70{
71 return vpa_call(0x7, cpu, 0);
72}
73
74static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
75{
76 return vpa_call(0x3, cpu, vpa);
77}
78
79static inline long unregister_dtl(unsigned long cpu)
80{
81 return vpa_call(0x6, cpu, 0);
82}
83
84static inline long register_dtl(unsigned long cpu, unsigned long vpa)
85{
86 return vpa_call(0x2, cpu, vpa);
87}
88
89static 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
105static 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
121extern void vpa_init(int cpu);
122
123static 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
137static 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 */
153static 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
168static 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 */
183static 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 */
201static 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
215static 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
221static 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
234static 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
240static 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
246static 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
252static 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
268static 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 */