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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 | |||
| 1702 | cejka | 29 | /** @addtogroup ppc64 |
| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 1160 | decky | 35 | #ifndef __ppc64_ASM_H__ |
| 36 | #define __ppc64_ASM_H__ |
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| 37 | |||
| 38 | #include <arch/types.h> |
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| 39 | #include <config.h> |
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| 40 | |||
| 41 | /** Enable interrupts. |
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| 42 | * |
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| 43 | * Enable interrupts and return previous |
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| 44 | * value of EE. |
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| 45 | * |
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| 46 | * @return Old interrupt priority level. |
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| 47 | */ |
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| 1398 | decky | 48 | static inline ipl_t interrupts_enable(void) |
| 49 | { |
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| 1160 | decky | 50 | ipl_t v; |
| 51 | ipl_t tmp; |
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| 52 | |||
| 1398 | decky | 53 | asm volatile ( |
| 1160 | decky | 54 | "mfmsr %0\n" |
| 55 | "mfmsr %1\n" |
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| 56 | "ori %1, %1, 1 << 15\n" |
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| 57 | "mtmsr %1\n" |
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| 58 | : "=r" (v), "=r" (tmp) |
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| 59 | ); |
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| 60 | return v; |
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| 61 | } |
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| 62 | |||
| 63 | /** Disable interrupts. |
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| 64 | * |
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| 65 | * Disable interrupts and return previous |
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| 66 | * value of EE. |
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| 67 | * |
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| 68 | * @return Old interrupt priority level. |
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| 69 | */ |
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| 1398 | decky | 70 | static inline ipl_t interrupts_disable(void) |
| 71 | { |
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| 1160 | decky | 72 | ipl_t v; |
| 73 | ipl_t tmp; |
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| 74 | |||
| 1398 | decky | 75 | asm volatile ( |
| 1160 | decky | 76 | "mfmsr %0\n" |
| 77 | "mfmsr %1\n" |
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| 78 | "rlwinm %1, %1, 0, 17, 15\n" |
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| 79 | "mtmsr %1\n" |
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| 80 | : "=r" (v), "=r" (tmp) |
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| 81 | ); |
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| 82 | return v; |
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| 83 | } |
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| 84 | |||
| 85 | /** Restore interrupt priority level. |
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| 86 | * |
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| 87 | * Restore EE. |
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| 88 | * |
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| 89 | * @param ipl Saved interrupt priority level. |
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| 90 | */ |
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| 1398 | decky | 91 | static inline void interrupts_restore(ipl_t ipl) |
| 92 | { |
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| 1160 | decky | 93 | ipl_t tmp; |
| 94 | |||
| 1398 | decky | 95 | asm volatile ( |
| 1160 | decky | 96 | "mfmsr %1\n" |
| 97 | "rlwimi %0, %1, 0, 17, 15\n" |
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| 98 | "cmpw 0, %0, %1\n" |
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| 99 | "beq 0f\n" |
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| 100 | "mtmsr %0\n" |
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| 101 | "0:\n" |
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| 102 | : "=r" (ipl), "=r" (tmp) |
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| 103 | : "0" (ipl) |
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| 1398 | decky | 104 | : "cr0" |
| 1160 | decky | 105 | ); |
| 106 | } |
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| 107 | |||
| 108 | /** Return interrupt priority level. |
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| 109 | * |
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| 110 | * Return EE. |
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| 111 | * |
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| 112 | * @return Current interrupt priority level. |
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| 113 | */ |
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| 1398 | decky | 114 | static inline ipl_t interrupts_read(void) |
| 115 | { |
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| 1160 | decky | 116 | ipl_t v; |
| 1398 | decky | 117 | |
| 118 | asm volatile ( |
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| 1160 | decky | 119 | "mfmsr %0\n" |
| 120 | : "=r" (v) |
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| 121 | ); |
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| 122 | return v; |
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| 123 | } |
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| 124 | |||
| 125 | /** Return base address of current stack. |
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| 126 | * |
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| 127 | * Return the base address of the current stack. |
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| 128 | * The stack is assumed to be STACK_SIZE bytes long. |
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| 129 | * The stack must start on page boundary. |
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| 130 | */ |
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| 131 | static inline __address get_stack_base(void) |
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| 132 | { |
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| 133 | __address v; |
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| 134 | |||
| 1398 | decky | 135 | asm volatile ( |
| 136 | "and %0, %%sp, %1\n" |
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| 137 | : "=r" (v) |
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| 138 | : "r" (~(STACK_SIZE - 1)) |
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| 139 | ); |
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| 1160 | decky | 140 | return v; |
| 141 | } |
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| 142 | |||
| 143 | static inline void cpu_sleep(void) |
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| 144 | { |
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| 145 | } |
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| 146 | |||
| 1399 | decky | 147 | static inline void cpu_halt(void) |
| 148 | { |
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| 149 | asm volatile ( |
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| 150 | "b 0\n" |
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| 151 | ); |
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| 152 | } |
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| 153 | |||
| 1160 | decky | 154 | void asm_delay_loop(__u32 t); |
| 155 | |||
| 1398 | decky | 156 | extern void userspace_asm(__address uspace_uarg, __address stack, __address entry); |
| 157 | |||
| 1160 | decky | 158 | #endif |
| 1702 | cejka | 159 | |
| 160 | /** @} |
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| 161 | */ |
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| 162 |