Annotation of src/sys/arch/sparc/include/psl.h, Revision 1.18.2.2
1.18.2.2! bouyer 1: /* $NetBSD$ */
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:
1.18.2.1 bouyer 78: /* define audio software interrupts to be at software level 4 */
79: #define PIL_AUSOFT 4
80: /* define floppy software interrupts to be at software level 4 too */
81: #define PIL_FDSOFT 4
82: /* network hardware interrupts at at most (XXX - is that true?) level 6 */
83: #define PIL_NET 6
1.15 mrg 84: #define PIL_CLOCK 10
85:
1.8 mycroft 86: #if defined(_KERNEL) && !defined(_LOCORE)
1.10 christos 87:
88: static __inline int getpsr __P((void));
89: static __inline void setpsr __P((int));
1.18.2.1 bouyer 90: static __inline void spl0 __P((void));
1.10 christos 91: static __inline int splhigh __P((void));
92: static __inline void splx __P((int));
1.12 pk 93: static __inline int getmid __P((void));
1.10 christos 94:
1.1 deraadt 95: /*
96: * GCC pseudo-functions for manipulating PSR (primarily PIL field).
97: */
1.10 christos 98: static __inline int getpsr()
99: {
1.1 deraadt 100: int psr;
101:
102: __asm __volatile("rd %%psr,%0" : "=r" (psr));
103: return (psr);
1.12 pk 104: }
105:
106: static __inline int getmid()
107: {
108: int mid;
109:
110: __asm __volatile("rd %%tbr,%0" : "=r" (mid));
111: return ((mid >> 20) & 0x3);
1.1 deraadt 112: }
113:
1.10 christos 114: static __inline void setpsr(newpsr)
115: int newpsr;
116: {
1.1 deraadt 117: __asm __volatile("wr %0,0,%%psr" : : "r" (newpsr));
1.18.2.1 bouyer 118: __asm __volatile("nop; nop; nop");
1.1 deraadt 119: }
120:
1.18.2.1 bouyer 121: static __inline void spl0()
1.10 christos 122: {
1.1 deraadt 123: int psr, oldipl;
124:
125: /*
126: * wrpsr xors two values: we choose old psr and old ipl here,
127: * which gives us the same value as the old psr but with all
128: * the old PIL bits turned off.
129: */
130: __asm __volatile("rd %%psr,%0" : "=r" (psr));
131: oldipl = psr & PSR_PIL;
132: __asm __volatile("wr %0,%1,%%psr" : : "r" (psr), "r" (oldipl));
133:
134: /*
135: * Three instructions must execute before we can depend
136: * on the bits to be changed.
137: */
138: __asm __volatile("nop; nop; nop");
139: }
140:
141: /*
142: * PIL 1 through 14 can use this macro.
143: * (spl0 and splhigh are special since they put all 0s or all 1s
144: * into the ipl field.)
145: */
1.18.2.1 bouyer 146: #define _SPLSET(name, newipl) \
147: static __inline void name __P((void)); \
148: static __inline void name() \
1.10 christos 149: { \
1.1 deraadt 150: int psr, oldipl; \
151: __asm __volatile("rd %%psr,%0" : "=r" (psr)); \
152: oldipl = psr & PSR_PIL; \
153: psr &= ~oldipl; \
154: __asm __volatile("wr %0,%1,%%psr" : : \
155: "r" (psr), "n" ((newipl) << 8)); \
156: __asm __volatile("nop; nop; nop"); \
157: }
1.18.2.1 bouyer 158:
159: /* Raise IPL and return previous value */
1.13 pk 160: #define _SPLRAISE(name, newipl) \
1.11 pk 161: static __inline int name __P((void)); \
162: static __inline int name() \
163: { \
164: int psr, oldipl; \
165: __asm __volatile("rd %%psr,%0" : "=r" (psr)); \
166: oldipl = psr & PSR_PIL; \
167: if ((newipl << 8) <= oldipl) \
1.18.2.1 bouyer 168: return (oldipl); \
1.11 pk 169: psr &= ~oldipl; \
170: __asm __volatile("wr %0,%1,%%psr" : : \
171: "r" (psr), "n" ((newipl) << 8)); \
172: __asm __volatile("nop; nop; nop"); \
173: return (oldipl); \
174: }
1.1 deraadt 175:
1.18.2.1 bouyer 176: _SPLSET(spllowersoftclock, 1)
1.18 thorpej 177:
178: _SPLRAISE(splsoftint, 1)
179: #define splsoftclock splsoftint
1.7 mycroft 180: #define splsoftnet splsoftint
181:
1.18.2.1 bouyer 182:
183: /* audio software interrupts */
1.18 thorpej 184: _SPLRAISE(splausoft, PIL_AUSOFT)
1.9 pk 185:
1.18.2.1 bouyer 186: /* floppy software interrupts */
1.18 thorpej 187: _SPLRAISE(splfdsoft, PIL_FDSOFT)
1.9 pk 188:
189: /* Block devices */
1.18 thorpej 190: _SPLRAISE(splbio, 5)
1.9 pk 191:
1.7 mycroft 192: /* network hardware interrupts are at level 6 */
1.18 thorpej 193: _SPLRAISE(splnet, PIL_NET)
1.1 deraadt 194:
195: /* tty input runs at software level 6 */
196: #define PIL_TTY 6
1.18 thorpej 197: _SPLRAISE(spltty, PIL_TTY)
1.3 deraadt 198:
1.9 pk 199: /*
200: * Memory allocation (must be as high as highest network, tty, or disk device)
201: */
1.18 thorpej 202: _SPLRAISE(splimp, 7)
1.18.2.2! bouyer 203: _SPLRAISE(splvm, 7)
1.1 deraadt 204:
1.14 mrg 205: /* clock interrupts at level 10 */
1.18 thorpej 206: _SPLRAISE(splclock, PIL_CLOCK)
1.5 pk 207:
1.18.2.1 bouyer 208: /* fd hardware, ts102, and tadpole microcontoller interrupts are at level 11 */
1.18 thorpej 209: _SPLRAISE(splfd, 11)
1.18.2.1 bouyer 210: _SPLRAISE(splts102, 11)
1.1 deraadt 211:
212: /* zs hardware interrupts are at level 12 */
1.18 thorpej 213: _SPLRAISE(splzs, 12)
214: _SPLRAISE(splserial, 12) /* XXX - other serial hardware might not be at lvl 12 */
1.1 deraadt 215:
216: /* audio hardware interrupts are at level 13 */
1.18 thorpej 217: _SPLRAISE(splaudio, 13)
1.1 deraadt 218:
219: /* second sparc timer interrupts at level 14 */
1.18 thorpej 220: _SPLRAISE(splstatclock, 14)
1.1 deraadt 221:
1.10 christos 222: static __inline int splhigh()
223: {
1.1 deraadt 224: int psr, oldipl;
225:
226: __asm __volatile("rd %%psr,%0" : "=r" (psr));
227: __asm __volatile("wr %0,0,%%psr" : : "r" (psr | PSR_PIL));
228: __asm __volatile("and %1,%2,%0; nop; nop" : "=r" (oldipl) : \
229: "r" (psr), "n" (PSR_PIL));
230: return (oldipl);
231: }
1.18.2.1 bouyer 232:
233: #define splsched() splhigh()
234: #define spllock() splhigh()
1.1 deraadt 235:
236: /* splx does not have a return value */
1.10 christos 237: static __inline void splx(newipl)
238: int newipl;
239: {
1.1 deraadt 240: int psr;
241:
242: __asm __volatile("rd %%psr,%0" : "=r" (psr));
243: __asm __volatile("wr %0,%1,%%psr" : : \
244: "r" (psr & ~PSR_PIL), "rn" (newipl));
245: __asm __volatile("nop; nop; nop");
246: }
1.8 mycroft 247: #endif /* KERNEL && !_LOCORE */
1.1 deraadt 248:
249: #endif /* PSR_IMPL */
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