* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* @(#)psl.h 8.2 (Berkeley) 9/27/93
* from: $Header: psl.h,v 1.13 93/09/27 01:37:25 torek Exp $
* SPARC Process Status Register (in psl.h for hysterical raisins).
* The picture in the Sun manuals looks like this:
* 31 28 27 24 23 20 19 14 3 2 11 8 7 6 5 4 0
* +-------+-------+-------+-----------+-+-+-------+-+-+-+---------+
* | impl | ver | icc | reserved |E|E| pil |S|P|E| CWP |
* | | |n z v c| |C|F| | |S|T| |
* +-------+-------+-------+-----------+-+-+-------+-+-+-+---------+
#define PSR_IMPL 0xf0000000 /* implementation */
#define PSR_VER 0x0f000000 /* version */
#define PSR_ICC 0x00f00000 /* integer condition codes */
#define PSR_N 0x00800000 /* negative */
#define PSR_Z 0x00400000 /* zero */
#define PSR_O 0x00200000 /* overflow */
#define PSR_C 0x00100000 /* carry */
#define PSR_EC 0x00002000 /* coprocessor enable */
#define PSR_EF 0x00001000 /* FP enable */
#define PSR_PIL 0x00000f00 /* interrupt level */
#define PSR_S 0x00000080 /* supervisor (kernel) mode */
#define PSR_PS 0x00000040 /* previous supervisor mode (traps) */
#define PSR_ET 0x00000020 /* trap enable */
#define PSR_CWP 0x0000001f /* current window pointer */
#define PSR_BITS "\20\16EC\15EF\10S\7PS\6ET"
#if defined(KERNEL) && !defined(LOCORE)
* GCC pseudo-functions for manipulating PSR (primarily PIL field).
static __inline
int getpsr() {
__asm
__volatile("rd %%psr,%0" : "=r" (psr
));
static __inline
void setpsr(int newpsr
) {
__asm
__volatile("wr %0,0,%%psr" : : "r" (newpsr
));
static __inline
int spl0() {
* wrpsr xors two values: we choose old psr and old ipl here,
* which gives us the same value as the old psr but with all
* the old PIL bits turned off.
__asm
__volatile("rd %%psr,%0" : "=r" (psr
));
__asm
__volatile("wr %0,%1,%%psr" : : "r" (psr
), "r" (oldipl
));
* Three instructions must execute before we can depend
* on the bits to be changed.
__asm
__volatile("nop; nop; nop");
* PIL 1 through 14 can use this macro.
* (spl0 and splhigh are special since they put all 0s or all 1s
#define SPL(name, newipl) \
static __inline int name() { \
__asm __volatile("rd %%psr,%0" : "=r" (psr)); \
oldipl = psr & PSR_PIL; \
__asm __volatile("wr %0,%1,%%psr" : : \
"r" (psr), "n" ((newipl) << 8)); \
__asm __volatile("nop; nop; nop"); \
#define splnet splsoftint
#define splsoftclock splsoftint
/* Memory allocation (must be as high as highest network device) */
/* tty input runs at software level 6 */
/* audio software interrupts are at software level 4 */
SPL(splausoft
, PIL_AUSOFT
)
/* zs hardware interrupts are at level 12 */
/* audio hardware interrupts are at level 13 */
/* second sparc timer interrupts at level 14 */
static __inline
int splhigh() {
__asm
__volatile("rd %%psr,%0" : "=r" (psr
));
__asm
__volatile("wr %0,0,%%psr" : : "r" (psr
| PSR_PIL
));
__asm
__volatile("and %1,%2,%0; nop; nop" : "=r" (oldipl
) : \
"r" (psr
), "n" (PSR_PIL
));
/* splx does not have a return value */
static __inline
void splx(int newipl
) {
__asm
__volatile("rd %%psr,%0" : "=r" (psr
));
__asm
__volatile("wr %0,%1,%%psr" : : \
"r" (psr
& ~PSR_PIL
), "rn" (newipl
));
__asm
__volatile("nop; nop; nop");
#endif /* KERNEL && !LOCORE */