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| Rev | Author | Line No. | Line |
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| 1160 | decky | 1 | /* |
| 2 | * Copyright (C) 2005 Martin Decky |
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| 3 | * All rights reserved. |
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| 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 __ppc64_ASM_H__ |
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| 30 | #define __ppc64_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 | |||
| 35 | /** Enable interrupts. |
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| 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 | * @return Old interrupt priority level. |
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| 41 | */ |
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| 1398 | decky | 42 | static inline ipl_t interrupts_enable(void) |
| 43 | { |
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| 1160 | decky | 44 | ipl_t v; |
| 45 | ipl_t tmp; |
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| 46 | |||
| 1398 | decky | 47 | asm volatile ( |
| 1160 | decky | 48 | "mfmsr %0\n" |
| 49 | "mfmsr %1\n" |
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| 50 | "ori %1, %1, 1 << 15\n" |
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| 51 | "mtmsr %1\n" |
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| 52 | : "=r" (v), "=r" (tmp) |
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| 53 | ); |
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| 54 | return v; |
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| 55 | } |
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| 56 | |||
| 57 | /** Disable interrupts. |
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| 58 | * |
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| 59 | * Disable interrupts and return previous |
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| 60 | * value of EE. |
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| 61 | * |
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| 62 | * @return Old interrupt priority level. |
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| 63 | */ |
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| 1398 | decky | 64 | static inline ipl_t interrupts_disable(void) |
| 65 | { |
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| 1160 | decky | 66 | ipl_t v; |
| 67 | ipl_t tmp; |
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| 68 | |||
| 1398 | decky | 69 | asm volatile ( |
| 1160 | decky | 70 | "mfmsr %0\n" |
| 71 | "mfmsr %1\n" |
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| 72 | "rlwinm %1, %1, 0, 17, 15\n" |
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| 73 | "mtmsr %1\n" |
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| 74 | : "=r" (v), "=r" (tmp) |
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| 75 | ); |
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| 76 | return v; |
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| 77 | } |
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| 78 | |||
| 79 | /** Restore interrupt priority level. |
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| 80 | * |
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| 81 | * Restore EE. |
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| 82 | * |
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| 83 | * @param ipl Saved interrupt priority level. |
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| 84 | */ |
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| 1398 | decky | 85 | static inline void interrupts_restore(ipl_t ipl) |
| 86 | { |
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| 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" |
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| 92 | "cmpw 0, %0, %1\n" |
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| 93 | "beq 0f\n" |
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| 94 | "mtmsr %0\n" |
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| 95 | "0:\n" |
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| 96 | : "=r" (ipl), "=r" (tmp) |
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| 97 | : "0" (ipl) |
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| 1398 | decky | 98 | : "cr0" |
| 1160 | decky | 99 | ); |
| 100 | } |
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| 101 | |||
| 102 | /** Return interrupt priority level. |
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| 103 | * |
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| 104 | * Return EE. |
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| 105 | * |
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| 106 | * @return Current interrupt priority level. |
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| 107 | */ |
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| 1398 | decky | 108 | static inline ipl_t interrupts_read(void) |
| 109 | { |
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| 1160 | decky | 110 | ipl_t v; |
| 1398 | decky | 111 | |
| 112 | asm volatile ( |
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| 1160 | decky | 113 | "mfmsr %0\n" |
| 114 | : "=r" (v) |
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| 115 | ); |
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| 116 | return v; |
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| 117 | } |
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| 118 | |||
| 119 | /** Return base address of current stack. |
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| 120 | * |
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| 121 | * Return the base address of the current stack. |
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| 122 | * The stack is assumed to be STACK_SIZE bytes long. |
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| 123 | * The stack must start on page boundary. |
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| 124 | */ |
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| 125 | static inline __address get_stack_base(void) |
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| 126 | { |
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| 127 | __address v; |
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| 128 | |||
| 1398 | decky | 129 | asm volatile ( |
| 130 | "and %0, %%sp, %1\n" |
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| 131 | : "=r" (v) |
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| 132 | : "r" (~(STACK_SIZE - 1)) |
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| 133 | ); |
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| 1160 | decky | 134 | return v; |
| 135 | } |
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| 136 | |||
| 137 | static inline void cpu_sleep(void) |
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| 138 | { |
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| 139 | } |
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| 140 | |||
| 1399 | decky | 141 | static inline void cpu_halt(void) |
| 142 | { |
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| 143 | asm volatile ( |
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| 144 | "b 0\n" |
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| 145 | ); |
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| 146 | } |
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| 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 |