Rev 1398 | Rev 1702 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1160 | decky | 1 | /* |
2 | * Copyright (C) 2005 Martin Decky |
||
3 | * All rights reserved. |
||
4 | * |
||
5 | * Redistribution and use in source and binary forms, with or without |
||
6 | * modification, are permitted provided that the following conditions |
||
7 | * are met: |
||
8 | * |
||
9 | * - Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * - Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
13 | * documentation and/or other materials provided with the distribution. |
||
14 | * - The name of the author may not be used to endorse or promote products |
||
15 | * derived from this software without specific prior written permission. |
||
16 | * |
||
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | */ |
||
28 | |||
29 | #ifndef __ppc64_ASM_H__ |
||
30 | #define __ppc64_ASM_H__ |
||
31 | |||
32 | #include <arch/types.h> |
||
33 | #include <config.h> |
||
34 | |||
35 | /** Enable interrupts. |
||
36 | * |
||
37 | * Enable interrupts and return previous |
||
38 | * value of EE. |
||
39 | * |
||
40 | * @return Old interrupt priority level. |
||
41 | */ |
||
1398 | decky | 42 | static inline ipl_t interrupts_enable(void) |
43 | { |
||
1160 | decky | 44 | ipl_t v; |
45 | ipl_t tmp; |
||
46 | |||
1398 | decky | 47 | asm volatile ( |
1160 | decky | 48 | "mfmsr %0\n" |
49 | "mfmsr %1\n" |
||
50 | "ori %1, %1, 1 << 15\n" |
||
51 | "mtmsr %1\n" |
||
52 | : "=r" (v), "=r" (tmp) |
||
53 | ); |
||
54 | return v; |
||
55 | } |
||
56 | |||
57 | /** Disable interrupts. |
||
58 | * |
||
59 | * Disable interrupts and return previous |
||
60 | * value of EE. |
||
61 | * |
||
62 | * @return Old interrupt priority level. |
||
63 | */ |
||
1398 | decky | 64 | static inline ipl_t interrupts_disable(void) |
65 | { |
||
1160 | decky | 66 | ipl_t v; |
67 | ipl_t tmp; |
||
68 | |||
1398 | decky | 69 | asm volatile ( |
1160 | decky | 70 | "mfmsr %0\n" |
71 | "mfmsr %1\n" |
||
72 | "rlwinm %1, %1, 0, 17, 15\n" |
||
73 | "mtmsr %1\n" |
||
74 | : "=r" (v), "=r" (tmp) |
||
75 | ); |
||
76 | return v; |
||
77 | } |
||
78 | |||
79 | /** Restore interrupt priority level. |
||
80 | * |
||
81 | * Restore EE. |
||
82 | * |
||
83 | * @param ipl Saved interrupt priority level. |
||
84 | */ |
||
1398 | decky | 85 | static inline void interrupts_restore(ipl_t ipl) |
86 | { |
||
1160 | decky | 87 | ipl_t tmp; |
88 | |||
1398 | decky | 89 | asm volatile ( |
1160 | decky | 90 | "mfmsr %1\n" |
91 | "rlwimi %0, %1, 0, 17, 15\n" |
||
92 | "cmpw 0, %0, %1\n" |
||
93 | "beq 0f\n" |
||
94 | "mtmsr %0\n" |
||
95 | "0:\n" |
||
96 | : "=r" (ipl), "=r" (tmp) |
||
97 | : "0" (ipl) |
||
1398 | decky | 98 | : "cr0" |
1160 | decky | 99 | ); |
100 | } |
||
101 | |||
102 | /** Return interrupt priority level. |
||
103 | * |
||
104 | * Return EE. |
||
105 | * |
||
106 | * @return Current interrupt priority level. |
||
107 | */ |
||
1398 | decky | 108 | static inline ipl_t interrupts_read(void) |
109 | { |
||
1160 | decky | 110 | ipl_t v; |
1398 | decky | 111 | |
112 | asm volatile ( |
||
1160 | decky | 113 | "mfmsr %0\n" |
114 | : "=r" (v) |
||
115 | ); |
||
116 | return v; |
||
117 | } |
||
118 | |||
119 | /** Return base address of current stack. |
||
120 | * |
||
121 | * Return the base address of the current stack. |
||
122 | * The stack is assumed to be STACK_SIZE bytes long. |
||
123 | * The stack must start on page boundary. |
||
124 | */ |
||
125 | static inline __address get_stack_base(void) |
||
126 | { |
||
127 | __address v; |
||
128 | |||
1398 | decky | 129 | asm volatile ( |
130 | "and %0, %%sp, %1\n" |
||
131 | : "=r" (v) |
||
132 | : "r" (~(STACK_SIZE - 1)) |
||
133 | ); |
||
1160 | decky | 134 | return v; |
135 | } |
||
136 | |||
137 | static inline void cpu_sleep(void) |
||
138 | { |
||
139 | } |
||
140 | |||
1399 | decky | 141 | static inline void cpu_halt(void) |
142 | { |
||
143 | asm volatile ( |
||
144 | "b 0\n" |
||
145 | ); |
||
146 | } |
||
147 | |||
1160 | decky | 148 | void asm_delay_loop(__u32 t); |
149 | |||
1398 | decky | 150 | extern void userspace_asm(__address uspace_uarg, __address stack, __address entry); |
151 | |||
1160 | decky | 152 | #endif |