Annotation of src/sys/arch/sparc/include/psl.h, Revision 1.19
1.19 ! garbled 1: /* $NetBSD: psl.h,v 1.18 1999/08/05 21:16:55 thorpej Exp $ */
1.4 deraadt 2:
1.1 deraadt 3: /*
4: * Copyright (c) 1992, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * This software was developed by the Computer Systems Engineering group
8: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9: * contributed to Berkeley.
10: *
11: * All advertising materials mentioning features or use of this software
12: * must display the following acknowledgement:
13: * This product includes software developed by the University of
14: * California, Lawrence Berkeley Laboratory.
15: *
16: * Redistribution and use in source and binary forms, with or without
17: * modification, are permitted provided that the following conditions
18: * are met:
19: * 1. Redistributions of source code must retain the above copyright
20: * notice, this list of conditions and the following disclaimer.
21: * 2. Redistributions in binary form must reproduce the above copyright
22: * notice, this list of conditions and the following disclaimer in the
23: * documentation and/or other materials provided with the distribution.
24: * 3. All advertising materials mentioning features or use of this software
25: * must display the following acknowledgement:
26: * This product includes software developed by the University of
27: * California, Berkeley and its contributors.
28: * 4. Neither the name of the University nor the names of its contributors
29: * may be used to endorse or promote products derived from this software
30: * without specific prior written permission.
31: *
32: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42: * SUCH DAMAGE.
43: *
44: * @(#)psl.h 8.1 (Berkeley) 6/11/93
45: */
46:
47: #ifndef PSR_IMPL
48:
49: /*
50: * SPARC Process Status Register (in psl.h for hysterical raisins).
51: *
52: * The picture in the Sun manuals looks like this:
53: * 1 1
54: * 31 28 27 24 23 20 19 14 3 2 11 8 7 6 5 4 0
55: * +-------+-------+-------+-----------+-+-+-------+-+-+-+---------+
56: * | impl | ver | icc | reserved |E|E| pil |S|P|E| CWP |
57: * | | |n z v c| |C|F| | |S|T| |
58: * +-------+-------+-------+-----------+-+-+-------+-+-+-+---------+
59: */
60:
61: #define PSR_IMPL 0xf0000000 /* implementation */
62: #define PSR_VER 0x0f000000 /* version */
63: #define PSR_ICC 0x00f00000 /* integer condition codes */
64: #define PSR_N 0x00800000 /* negative */
65: #define PSR_Z 0x00400000 /* zero */
66: #define PSR_O 0x00200000 /* overflow */
67: #define PSR_C 0x00100000 /* carry */
68: #define PSR_EC 0x00002000 /* coprocessor enable */
69: #define PSR_EF 0x00001000 /* FP enable */
70: #define PSR_PIL 0x00000f00 /* interrupt level */
71: #define PSR_S 0x00000080 /* supervisor (kernel) mode */
72: #define PSR_PS 0x00000040 /* previous supervisor mode (traps) */
73: #define PSR_ET 0x00000020 /* trap enable */
74: #define PSR_CWP 0x0000001f /* current window pointer */
75:
76: #define PSR_BITS "\20\16EC\15EF\10S\7PS\6ET"
77:
1.15 mrg 78: #define PIL_CLOCK 10
79:
1.8 mycroft 80: #if defined(_KERNEL) && !defined(_LOCORE)
1.10 christos 81:
82: static __inline int getpsr __P((void));
83: static __inline void setpsr __P((int));
84: static __inline int spl0 __P((void));
85: static __inline int splhigh __P((void));
86: static __inline void splx __P((int));
1.12 pk 87: static __inline int getmid __P((void));
1.10 christos 88:
1.1 deraadt 89: /*
90: * GCC pseudo-functions for manipulating PSR (primarily PIL field).
91: */
1.10 christos 92: static __inline int getpsr()
93: {
1.1 deraadt 94: int psr;
95:
96: __asm __volatile("rd %%psr,%0" : "=r" (psr));
97: return (psr);
1.12 pk 98: }
99:
100: static __inline int getmid()
101: {
102: int mid;
103:
104: __asm __volatile("rd %%tbr,%0" : "=r" (mid));
105: return ((mid >> 20) & 0x3);
1.1 deraadt 106: }
107:
1.10 christos 108: static __inline void setpsr(newpsr)
109: int newpsr;
110: {
1.1 deraadt 111: __asm __volatile("wr %0,0,%%psr" : : "r" (newpsr));
112: __asm __volatile("nop");
113: __asm __volatile("nop");
114: __asm __volatile("nop");
115: }
116:
1.10 christos 117: static __inline int spl0()
118: {
1.1 deraadt 119: int psr, oldipl;
120:
121: /*
122: * wrpsr xors two values: we choose old psr and old ipl here,
123: * which gives us the same value as the old psr but with all
124: * the old PIL bits turned off.
125: */
126: __asm __volatile("rd %%psr,%0" : "=r" (psr));
127: oldipl = psr & PSR_PIL;
128: __asm __volatile("wr %0,%1,%%psr" : : "r" (psr), "r" (oldipl));
129:
130: /*
131: * Three instructions must execute before we can depend
132: * on the bits to be changed.
133: */
134: __asm __volatile("nop; nop; nop");
135: return (oldipl);
136: }
137:
138: /*
139: * PIL 1 through 14 can use this macro.
140: * (spl0 and splhigh are special since they put all 0s or all 1s
141: * into the ipl field.)
142: */
143: #define SPL(name, newipl) \
1.10 christos 144: static __inline int name __P((void)); \
145: static __inline int name() \
146: { \
1.1 deraadt 147: int psr, oldipl; \
148: __asm __volatile("rd %%psr,%0" : "=r" (psr)); \
149: oldipl = psr & PSR_PIL; \
150: psr &= ~oldipl; \
151: __asm __volatile("wr %0,%1,%%psr" : : \
152: "r" (psr), "n" ((newipl) << 8)); \
153: __asm __volatile("nop; nop; nop"); \
154: return (oldipl); \
155: }
1.11 pk 156: /* A non-priority-decreasing version of SPL */
1.13 pk 157: #define _SPLRAISE(name, newipl) \
1.11 pk 158: static __inline int name __P((void)); \
159: static __inline int name() \
160: { \
161: int psr, oldipl; \
162: __asm __volatile("rd %%psr,%0" : "=r" (psr)); \
163: oldipl = psr & PSR_PIL; \
164: if ((newipl << 8) <= oldipl) \
165: return oldipl; \
166: psr &= ~oldipl; \
167: __asm __volatile("wr %0,%1,%%psr" : : \
168: "r" (psr), "n" ((newipl) << 8)); \
169: __asm __volatile("nop; nop; nop"); \
170: return (oldipl); \
171: }
1.1 deraadt 172:
1.18 thorpej 173: SPL(spllowersoftclock, 1)
174:
175: _SPLRAISE(splsoftint, 1)
176: #define splsoftclock splsoftint
1.7 mycroft 177: #define splsoftnet splsoftint
178:
1.9 pk 179: /* audio software interrupts are at software level 4 */
180: #define PIL_AUSOFT 4
1.18 thorpej 181: _SPLRAISE(splausoft, PIL_AUSOFT)
1.9 pk 182:
183: /* floppy software interrupts are at software level 4 too */
184: #define PIL_FDSOFT 4
1.18 thorpej 185: _SPLRAISE(splfdsoft, PIL_FDSOFT)
1.9 pk 186:
187: /* Block devices */
1.18 thorpej 188: _SPLRAISE(splbio, 5)
1.9 pk 189:
1.7 mycroft 190: /* network hardware interrupts are at level 6 */
191: #define PIL_NET 6
1.18 thorpej 192: _SPLRAISE(splnet, PIL_NET)
1.1 deraadt 193:
194: /* tty input runs at software level 6 */
195: #define PIL_TTY 6
1.18 thorpej 196: _SPLRAISE(spltty, PIL_TTY)
1.3 deraadt 197:
1.9 pk 198: /*
199: * Memory allocation (must be as high as highest network, tty, or disk device)
200: */
1.18 thorpej 201: _SPLRAISE(splimp, 7)
202: _SPLRAISE(splpmap, 7)
1.1 deraadt 203:
1.14 mrg 204: /* clock interrupts at level 10 */
1.18 thorpej 205: _SPLRAISE(splclock, PIL_CLOCK)
1.5 pk 206:
1.19 ! garbled 207: /* fd hardware, ts102, and tadpole microcontoller interrupts are at level 11 */
1.18 thorpej 208: _SPLRAISE(splfd, 11)
1.19 ! garbled 209: _SPLRAISE(splts102, 11)
1.1 deraadt 210:
211: /* zs hardware interrupts are at level 12 */
1.18 thorpej 212: _SPLRAISE(splzs, 12)
213: _SPLRAISE(splserial, 12) /* XXX - other serial hardware might not be at lvl 12 */
1.1 deraadt 214:
215: /* audio hardware interrupts are at level 13 */
1.18 thorpej 216: _SPLRAISE(splaudio, 13)
1.1 deraadt 217:
218: /* second sparc timer interrupts at level 14 */
1.18 thorpej 219: _SPLRAISE(splstatclock, 14)
1.1 deraadt 220:
1.10 christos 221: static __inline int splhigh()
222: {
1.1 deraadt 223: int psr, oldipl;
224:
225: __asm __volatile("rd %%psr,%0" : "=r" (psr));
226: __asm __volatile("wr %0,0,%%psr" : : "r" (psr | PSR_PIL));
227: __asm __volatile("and %1,%2,%0; nop; nop" : "=r" (oldipl) : \
228: "r" (psr), "n" (PSR_PIL));
229: return (oldipl);
230: }
231:
232: /* splx does not have a return value */
1.10 christos 233: static __inline void splx(newipl)
234: int newipl;
235: {
1.1 deraadt 236: int psr;
237:
238: __asm __volatile("rd %%psr,%0" : "=r" (psr));
239: __asm __volatile("wr %0,%1,%%psr" : : \
240: "r" (psr & ~PSR_PIL), "rn" (newipl));
241: __asm __volatile("nop; nop; nop");
242: }
1.8 mycroft 243: #endif /* KERNEL && !_LOCORE */
1.1 deraadt 244:
245: #endif /* PSR_IMPL */
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