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1/*
2 * psr.h: This file holds the macros for masking off various parts of
3 * the processor status register on the Sparc. This is valid
4 * for Version 8. On the V9 this is renamed to the PSTATE
5 * register and its members are accessed as fields like
6 * PSTATE.PRIV for the current CPU privilege level.
7 *
8 * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
9 */
10
11#ifndef __LINUX_SPARC_PSR_H
12#define __LINUX_SPARC_PSR_H
13
14/* The Sparc PSR fields are laid out as the following:
15 *
16 * ------------------------------------------------------------------------
17 * | impl | vers | icc | resv | EC | EF | PIL | S | PS | ET | CWP |
18 * | 31-28 | 27-24 | 23-20 | 19-14 | 13 | 12 | 11-8 | 7 | 6 | 5 | 4-0 |
19 * ------------------------------------------------------------------------
20 */
21#define PSR_CWP 0x0000001f /* current window pointer */
22#define PSR_ET 0x00000020 /* enable traps field */
23#define PSR_PS 0x00000040 /* previous privilege level */
24#define PSR_S 0x00000080 /* current privilege level */
25#define PSR_PIL 0x00000f00 /* processor interrupt level */
26#define PSR_EF 0x00001000 /* enable floating point */
27#define PSR_EC 0x00002000 /* enable co-processor */
28#define PSR_SYSCALL 0x00004000 /* inside of a syscall */
29#define PSR_LE 0x00008000 /* SuperSparcII little-endian */
30#define PSR_ICC 0x00f00000 /* integer condition codes */
31#define PSR_C 0x00100000 /* carry bit */
32#define PSR_V 0x00200000 /* overflow bit */
33#define PSR_Z 0x00400000 /* zero bit */
34#define PSR_N 0x00800000 /* negative bit */
35#define PSR_VERS 0x0f000000 /* cpu-version field */
36#define PSR_IMPL 0xf0000000 /* cpu-implementation field */
37
38#define PSR_VERS_SHIFT 24
39#define PSR_IMPL_SHIFT 28
40#define PSR_VERS_SHIFTED_MASK 0xf
41#define PSR_IMPL_SHIFTED_MASK 0xf
42
43#define PSR_IMPL_TI 0x4
44#define PSR_IMPL_LEON 0xf
45
46#ifdef __KERNEL__
47
48#ifndef __ASSEMBLY__
49/* Get the %psr register. */
50static inline unsigned int get_psr(void)
51{
52 unsigned int psr;
53 __asm__ __volatile__(
54 "rd %%psr, %0\n\t"
55 "nop\n\t"
56 "nop\n\t"
57 "nop\n\t"
58 : "=r" (psr)
59 : /* no inputs */
60 : "memory");
61
62 return psr;
63}
64
65static inline void put_psr(unsigned int new_psr)
66{
67 __asm__ __volatile__(
68 "wr %0, 0x0, %%psr\n\t"
69 "nop\n\t"
70 "nop\n\t"
71 "nop\n\t"
72 : /* no outputs */
73 : "r" (new_psr)
74 : "memory", "cc");
75}
76
77/* Get the %fsr register. Be careful, make sure the floating point
78 * enable bit is set in the %psr when you execute this or you will
79 * incur a trap.
80 */
81
82extern unsigned int fsr_storage;
83
84static inline unsigned int get_fsr(void)
85{
86 unsigned int fsr = 0;
87
88 __asm__ __volatile__(
89 "st %%fsr, %1\n\t"
90 "ld %1, %0\n\t"
91 : "=r" (fsr)
92 : "m" (fsr_storage));
93
94 return fsr;
95}
96
97#endif /* !(__ASSEMBLY__) */
98
99#endif /* (__KERNEL__) */
100
101#endif /* !(__LINUX_SPARC_PSR_H) */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * psr.h: This file holds the macros for masking off various parts of
4 * the processor status register on the Sparc. This is valid
5 * for Version 8. On the V9 this is renamed to the PSTATE
6 * register and its members are accessed as fields like
7 * PSTATE.PRIV for the current CPU privilege level.
8 *
9 * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
10 */
11#ifndef __LINUX_SPARC_PSR_H
12#define __LINUX_SPARC_PSR_H
13
14#include <uapi/asm/psr.h>
15
16
17#ifndef __ASSEMBLY__
18/* Get the %psr register. */
19static inline unsigned int get_psr(void)
20{
21 unsigned int psr;
22 __asm__ __volatile__(
23 "rd %%psr, %0\n\t"
24 "nop\n\t"
25 "nop\n\t"
26 "nop\n\t"
27 : "=r" (psr)
28 : /* no inputs */
29 : "memory");
30
31 return psr;
32}
33
34static inline void put_psr(unsigned int new_psr)
35{
36 __asm__ __volatile__(
37 "wr %0, 0x0, %%psr\n\t"
38 "nop\n\t"
39 "nop\n\t"
40 "nop\n\t"
41 : /* no outputs */
42 : "r" (new_psr)
43 : "memory", "cc");
44}
45
46/* Get the %fsr register. Be careful, make sure the floating point
47 * enable bit is set in the %psr when you execute this or you will
48 * incur a trap.
49 */
50
51extern unsigned int fsr_storage;
52
53static inline unsigned int get_fsr(void)
54{
55 unsigned int fsr = 0;
56
57 __asm__ __volatile__(
58 "st %%fsr, %1\n\t"
59 "ld %1, %0\n\t"
60 : "=r" (fsr)
61 : "m" (fsr_storage));
62
63 return fsr;
64}
65
66#endif /* !(__ASSEMBLY__) */
67
68#endif /* !(__LINUX_SPARC_PSR_H) */