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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Martin Decky |
2 | * Copyright (C) 2005 Martin Decky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #ifndef __ppc_ASM_H__ |
29 | #ifndef __ppc_ASM_H__ |
30 | #define __ppc_ASM_H__ |
30 | #define __ppc_ASM_H__ |
31 | 31 | ||
32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
33 | #include <config.h> |
33 | #include <config.h> |
34 | 34 | ||
35 | /** Set priority level low |
35 | /** Set priority level low |
36 | * |
36 | * |
37 | * Enable interrupts and return previous |
37 | * Enable interrupts and return previous |
38 | * value of EE. |
38 | * value of EE. |
39 | */ |
39 | */ |
40 | static inline pri_t cpu_priority_low(void) { |
40 | static inline pri_t cpu_priority_low(void) { |
41 | pri_t v; |
41 | pri_t v; |
42 | __asm__ volatile ( |
42 | __asm__ volatile ( |
43 | "\n" |
43 | "mfmsr %0\n" |
- | 44 | "mfmsr %%r31\n" |
|
- | 45 | "ori %%r31, %%r31, 1 << 15\n" |
|
- | 46 | "mtmsr %%r31\n" |
|
44 | : "=r" (v) |
47 | : "=r" (v) |
- | 48 | : |
|
- | 49 | : "%r31" |
|
45 | ); |
50 | ); |
46 | return v; |
51 | return v; |
47 | } |
52 | } |
48 | 53 | ||
49 | /** Set priority level high |
54 | /** Set priority level high |
50 | * |
55 | * |
51 | * Disable interrupts and return previous |
56 | * Disable interrupts and return previous |
52 | * value of EE. |
57 | * value of EE. |
53 | */ |
58 | */ |
54 | static inline pri_t cpu_priority_high(void) { |
59 | static inline pri_t cpu_priority_high(void) { |
55 | pri_t v; |
60 | pri_t v; |
56 | __asm__ volatile ( |
61 | __asm__ volatile ( |
57 | "\n" |
62 | "mfmsr %0\n" |
- | 63 | "mfmsr %%r31\n" |
|
- | 64 | "rlwinm %%r31, %%r31, 0, 17, 15\n" |
|
- | 65 | "mtmsr %%r31\n" |
|
58 | : "=r" (v) |
66 | : "=r" (v) |
- | 67 | : |
|
- | 68 | : "%r31" |
|
59 | ); |
69 | ); |
60 | return v; |
70 | return v; |
61 | } |
71 | } |
62 | 72 | ||
63 | /** Restore priority level |
73 | /** Restore priority level |
64 | * |
74 | * |
65 | * Restore EE. |
75 | * Restore EE. |
66 | */ |
76 | */ |
67 | static inline void cpu_priority_restore(pri_t pri) { |
77 | static inline void cpu_priority_restore(pri_t pri) { |
68 | __asm__ volatile ( |
78 | __asm__ volatile ( |
- | 79 | "mfmsr %%r31\n" |
|
- | 80 | "rlwimi %0, %%r31, 0, 17, 15\n" |
|
69 | "\n" |
81 | "mtmsr %0\n" |
70 | : : "r" (pri) |
82 | : "=r" (pri) |
- | 83 | : "0" (pri) |
|
- | 84 | : "%r31" |
|
71 | ); |
85 | ); |
72 | } |
86 | } |
73 | 87 | ||
74 | /* TODO: implement the real stuff */ |
88 | /* TODO: implement the real stuff */ |
75 | static inline __address get_stack_base(void) |
89 | static inline __address get_stack_base(void) |
76 | { |
90 | { |
77 | return NULL; |
91 | return NULL; |
78 | } |
92 | } |
79 | 93 | ||
80 | void cpu_sleep(void); |
94 | void cpu_sleep(void); |
81 | void asm_delay_loop(__u32 t); |
95 | void asm_delay_loop(__u32 t); |
82 | 96 | ||
83 | #endif |
97 | #endif |
84 | 98 |