tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Channel subsystem I/O instructions.
3 */
4
5#include <linux/export.h>
6
7#include <asm/chpid.h>
8#include <asm/schid.h>
9#include <asm/crw.h>
10
11#include "ioasm.h"
12#include "orb.h"
13#include "cio.h"
14
15int stsch(struct subchannel_id schid, struct schib *addr)
16{
17 register struct subchannel_id reg1 asm ("1") = schid;
18 int ccode = -EIO;
19
20 asm volatile(
21 " stsch 0(%3)\n"
22 "0: ipm %0\n"
23 " srl %0,28\n"
24 "1:\n"
25 EX_TABLE(0b, 1b)
26 : "+d" (ccode), "=m" (*addr)
27 : "d" (reg1), "a" (addr)
28 : "cc");
29 trace_s390_cio_stsch(schid, addr, ccode);
30
31 return ccode;
32}
33EXPORT_SYMBOL(stsch);
34
35int msch(struct subchannel_id schid, struct schib *addr)
36{
37 register struct subchannel_id reg1 asm ("1") = schid;
38 int ccode = -EIO;
39
40 asm volatile(
41 " msch 0(%2)\n"
42 "0: ipm %0\n"
43 " srl %0,28\n"
44 "1:\n"
45 EX_TABLE(0b, 1b)
46 : "+d" (ccode)
47 : "d" (reg1), "a" (addr), "m" (*addr)
48 : "cc");
49 trace_s390_cio_msch(schid, addr, ccode);
50
51 return ccode;
52}
53
54int tsch(struct subchannel_id schid, struct irb *addr)
55{
56 register struct subchannel_id reg1 asm ("1") = schid;
57 int ccode;
58
59 asm volatile(
60 " tsch 0(%3)\n"
61 " ipm %0\n"
62 " srl %0,28"
63 : "=d" (ccode), "=m" (*addr)
64 : "d" (reg1), "a" (addr)
65 : "cc");
66 trace_s390_cio_tsch(schid, addr, ccode);
67
68 return ccode;
69}
70
71int ssch(struct subchannel_id schid, union orb *addr)
72{
73 register struct subchannel_id reg1 asm("1") = schid;
74 int ccode = -EIO;
75
76 asm volatile(
77 " ssch 0(%2)\n"
78 "0: ipm %0\n"
79 " srl %0,28\n"
80 "1:\n"
81 EX_TABLE(0b, 1b)
82 : "+d" (ccode)
83 : "d" (reg1), "a" (addr), "m" (*addr)
84 : "cc", "memory");
85 trace_s390_cio_ssch(schid, addr, ccode);
86
87 return ccode;
88}
89EXPORT_SYMBOL(ssch);
90
91int csch(struct subchannel_id schid)
92{
93 register struct subchannel_id reg1 asm("1") = schid;
94 int ccode;
95
96 asm volatile(
97 " csch\n"
98 " ipm %0\n"
99 " srl %0,28"
100 : "=d" (ccode)
101 : "d" (reg1)
102 : "cc");
103 trace_s390_cio_csch(schid, ccode);
104
105 return ccode;
106}
107EXPORT_SYMBOL(csch);
108
109int tpi(struct tpi_info *addr)
110{
111 int ccode;
112
113 asm volatile(
114 " tpi 0(%2)\n"
115 " ipm %0\n"
116 " srl %0,28"
117 : "=d" (ccode), "=m" (*addr)
118 : "a" (addr)
119 : "cc");
120 trace_s390_cio_tpi(addr, ccode);
121
122 return ccode;
123}
124
125int chsc(void *chsc_area)
126{
127 typedef struct { char _[4096]; } addr_type;
128 int cc;
129
130 asm volatile(
131 " .insn rre,0xb25f0000,%2,0\n"
132 " ipm %0\n"
133 " srl %0,28\n"
134 : "=d" (cc), "=m" (*(addr_type *) chsc_area)
135 : "d" (chsc_area), "m" (*(addr_type *) chsc_area)
136 : "cc");
137 trace_s390_cio_chsc(chsc_area, cc);
138
139 return cc;
140}
141EXPORT_SYMBOL(chsc);
142
143int rchp(struct chp_id chpid)
144{
145 register struct chp_id reg1 asm ("1") = chpid;
146 int ccode;
147
148 asm volatile(
149 " lr 1,%1\n"
150 " rchp\n"
151 " ipm %0\n"
152 " srl %0,28"
153 : "=d" (ccode) : "d" (reg1) : "cc");
154 trace_s390_cio_rchp(chpid, ccode);
155
156 return ccode;
157}
158
159int rsch(struct subchannel_id schid)
160{
161 register struct subchannel_id reg1 asm("1") = schid;
162 int ccode;
163
164 asm volatile(
165 " rsch\n"
166 " ipm %0\n"
167 " srl %0,28"
168 : "=d" (ccode)
169 : "d" (reg1)
170 : "cc", "memory");
171 trace_s390_cio_rsch(schid, ccode);
172
173 return ccode;
174}
175
176int hsch(struct subchannel_id schid)
177{
178 register struct subchannel_id reg1 asm("1") = schid;
179 int ccode;
180
181 asm volatile(
182 " hsch\n"
183 " ipm %0\n"
184 " srl %0,28"
185 : "=d" (ccode)
186 : "d" (reg1)
187 : "cc");
188 trace_s390_cio_hsch(schid, ccode);
189
190 return ccode;
191}
192
193int xsch(struct subchannel_id schid)
194{
195 register struct subchannel_id reg1 asm("1") = schid;
196 int ccode;
197
198 asm volatile(
199 " xsch\n"
200 " ipm %0\n"
201 " srl %0,28"
202 : "=d" (ccode)
203 : "d" (reg1)
204 : "cc");
205 trace_s390_cio_xsch(schid, ccode);
206
207 return ccode;
208}
209
210int stcrw(struct crw *crw)
211{
212 int ccode;
213
214 asm volatile(
215 " stcrw 0(%2)\n"
216 " ipm %0\n"
217 " srl %0,28\n"
218 : "=d" (ccode), "=m" (*crw)
219 : "a" (crw)
220 : "cc");
221 trace_s390_cio_stcrw(crw, ccode);
222
223 return ccode;
224}