Rev 1398 | Go to most recent revision | Details | 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 | */ |
||
| 42 | static inline ipl_t interrupts_enable(void) { |
||
| 43 | ipl_t v; |
||
| 44 | ipl_t tmp; |
||
| 45 | |||
| 46 | __asm__ volatile ( |
||
| 47 | "mfmsr %0\n" |
||
| 48 | "mfmsr %1\n" |
||
| 49 | "ori %1, %1, 1 << 15\n" |
||
| 50 | "mtmsr %1\n" |
||
| 51 | : "=r" (v), "=r" (tmp) |
||
| 52 | ); |
||
| 53 | return v; |
||
| 54 | } |
||
| 55 | |||
| 56 | /** Disable interrupts. |
||
| 57 | * |
||
| 58 | * Disable interrupts and return previous |
||
| 59 | * value of EE. |
||
| 60 | * |
||
| 61 | * @return Old interrupt priority level. |
||
| 62 | */ |
||
| 63 | static inline ipl_t interrupts_disable(void) { |
||
| 64 | ipl_t v; |
||
| 65 | ipl_t tmp; |
||
| 66 | |||
| 67 | __asm__ volatile ( |
||
| 68 | "mfmsr %0\n" |
||
| 69 | "mfmsr %1\n" |
||
| 70 | "rlwinm %1, %1, 0, 17, 15\n" |
||
| 71 | "mtmsr %1\n" |
||
| 72 | : "=r" (v), "=r" (tmp) |
||
| 73 | ); |
||
| 74 | return v; |
||
| 75 | } |
||
| 76 | |||
| 77 | /** Restore interrupt priority level. |
||
| 78 | * |
||
| 79 | * Restore EE. |
||
| 80 | * |
||
| 81 | * @param ipl Saved interrupt priority level. |
||
| 82 | */ |
||
| 83 | static inline void interrupts_restore(ipl_t ipl) { |
||
| 84 | ipl_t tmp; |
||
| 85 | |||
| 86 | __asm__ volatile ( |
||
| 87 | "mfmsr %1\n" |
||
| 88 | "rlwimi %0, %1, 0, 17, 15\n" |
||
| 89 | "cmpw 0, %0, %1\n" |
||
| 90 | "beq 0f\n" |
||
| 91 | "mtmsr %0\n" |
||
| 92 | "0:\n" |
||
| 93 | : "=r" (ipl), "=r" (tmp) |
||
| 94 | : "0" (ipl) |
||
| 95 | ); |
||
| 96 | } |
||
| 97 | |||
| 98 | /** Return interrupt priority level. |
||
| 99 | * |
||
| 100 | * Return EE. |
||
| 101 | * |
||
| 102 | * @return Current interrupt priority level. |
||
| 103 | */ |
||
| 104 | static inline ipl_t interrupts_read(void) { |
||
| 105 | ipl_t v; |
||
| 106 | __asm__ volatile ( |
||
| 107 | "mfmsr %0\n" |
||
| 108 | : "=r" (v) |
||
| 109 | ); |
||
| 110 | return v; |
||
| 111 | } |
||
| 112 | |||
| 113 | /** Return base address of current stack. |
||
| 114 | * |
||
| 115 | * Return the base address of the current stack. |
||
| 116 | * The stack is assumed to be STACK_SIZE bytes long. |
||
| 117 | * The stack must start on page boundary. |
||
| 118 | */ |
||
| 119 | static inline __address get_stack_base(void) |
||
| 120 | { |
||
| 121 | __address v; |
||
| 122 | |||
| 123 | __asm__ volatile ("and %0, %%sp, %1\n" : "=r" (v) : "r" (~(STACK_SIZE-1))); |
||
| 124 | |||
| 125 | return v; |
||
| 126 | } |
||
| 127 | |||
| 128 | static inline void cpu_sleep(void) |
||
| 129 | { |
||
| 130 | } |
||
| 131 | |||
| 132 | void cpu_halt(void); |
||
| 133 | void asm_delay_loop(__u32 t); |
||
| 134 | |||
| 135 | #endif |