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| Rev | Author | Line No. | Line |
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| 173 | jermar | 1 | /* |
| 191 | decky | 2 | * Copyright (C) 2005 Martin Decky |
| 173 | jermar | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __ppc_ASM_H__ |
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| 30 | #define __ppc_ASM_H__ |
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| 31 | |||
| 32 | #include <arch/types.h> |
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| 33 | #include <config.h> |
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| 34 | |||
| 191 | decky | 35 | /** Set priority level low |
| 36 | * |
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| 37 | * Enable interrupts and return previous |
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| 38 | * value of EE. |
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| 39 | */ |
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| 40 | static inline pri_t cpu_priority_low(void) { |
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| 41 | pri_t v; |
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| 254 | decky | 42 | pri_t tmp; |
| 43 | |||
| 191 | decky | 44 | __asm__ volatile ( |
| 204 | decky | 45 | "mfmsr %0\n" |
| 254 | decky | 46 | "mfmsr %1\n" |
| 47 | "ori %1, %1, 1 << 15\n" |
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| 48 | "mtmsr %1\n" |
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| 49 | : "=r" (v), "=r" (tmp) |
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| 191 | decky | 50 | ); |
| 51 | return v; |
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| 52 | } |
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| 53 | |||
| 54 | /** Set priority level high |
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| 55 | * |
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| 56 | * Disable interrupts and return previous |
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| 57 | * value of EE. |
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| 58 | */ |
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| 59 | static inline pri_t cpu_priority_high(void) { |
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| 60 | pri_t v; |
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| 254 | decky | 61 | pri_t tmp; |
| 62 | |||
| 191 | decky | 63 | __asm__ volatile ( |
| 204 | decky | 64 | "mfmsr %0\n" |
| 254 | decky | 65 | "mfmsr %1\n" |
| 66 | "rlwinm %1, %1, 0, 17, 15\n" |
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| 67 | "mtmsr %1\n" |
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| 68 | : "=r" (v), "=r" (tmp) |
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| 191 | decky | 69 | ); |
| 70 | return v; |
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| 71 | } |
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| 72 | |||
| 73 | /** Restore priority level |
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| 74 | * |
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| 75 | * Restore EE. |
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| 76 | */ |
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| 77 | static inline void cpu_priority_restore(pri_t pri) { |
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| 254 | decky | 78 | pri_t tmp; |
| 79 | |||
| 191 | decky | 80 | __asm__ volatile ( |
| 254 | decky | 81 | "mfmsr %1\n" |
| 82 | "rlwimi %0, %1, 0, 17, 15\n" |
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| 83 | "cmpw 0, %0, %1\n" |
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| 210 | decky | 84 | "beq 0f\n" |
| 204 | decky | 85 | "mtmsr %0\n" |
| 210 | decky | 86 | "0:\n" |
| 254 | decky | 87 | : "=r" (pri), "=r" (tmp) |
| 204 | decky | 88 | : "0" (pri) |
| 191 | decky | 89 | ); |
| 90 | } |
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| 91 | |||
| 210 | decky | 92 | /** Return raw priority level |
| 93 | * |
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| 94 | * Return EE. |
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| 95 | */ |
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| 96 | static inline pri_t cpu_priority_read(void) { |
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| 97 | pri_t v; |
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| 98 | __asm__ volatile ( |
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| 99 | "mfmsr %0\n" |
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| 100 | : "=r" (v) |
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| 101 | ); |
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| 102 | return v; |
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| 103 | } |
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| 104 | |||
| 253 | jermar | 105 | /** Return base address of current stack. |
| 106 | * |
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| 107 | * Return the base address of the current stack. |
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| 108 | * The stack is assumed to be STACK_SIZE bytes long. |
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| 109 | * The stack must start on page boundary. |
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| 110 | */ |
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| 173 | jermar | 111 | static inline __address get_stack_base(void) |
| 112 | { |
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| 253 | jermar | 113 | __address v; |
| 114 | |||
| 115 | __asm__ volatile ("and %0, %%r1, %1\n" : "=r" (v) : "r" (~(STACK_SIZE-1))); |
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| 116 | |||
| 117 | return v; |
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| 173 | jermar | 118 | } |
| 119 | |||
| 254 | decky | 120 | void cpu_halt(void); |
| 201 | decky | 121 | void cpu_sleep(void); |
| 122 | void asm_delay_loop(__u32 t); |
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| 123 | |||
| 173 | jermar | 124 | #endif |