Rev 204 | Rev 253 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 173 | jermar | 1 | /* |
| 191 | decky | 2 | * Copyright (C) 2005 Martin Decky |
| 173 | jermar | 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 __ppc_ASM_H__ |
||
| 30 | #define __ppc_ASM_H__ |
||
| 31 | |||
| 32 | #include <arch/types.h> |
||
| 33 | #include <config.h> |
||
| 34 | |||
| 191 | decky | 35 | /** Set priority level low |
| 36 | * |
||
| 37 | * Enable interrupts and return previous |
||
| 38 | * value of EE. |
||
| 39 | */ |
||
| 40 | static inline pri_t cpu_priority_low(void) { |
||
| 41 | pri_t v; |
||
| 42 | __asm__ volatile ( |
||
| 204 | decky | 43 | "mfmsr %0\n" |
| 44 | "mfmsr %%r31\n" |
||
| 45 | "ori %%r31, %%r31, 1 << 15\n" |
||
| 46 | "mtmsr %%r31\n" |
||
| 191 | decky | 47 | : "=r" (v) |
| 204 | decky | 48 | : |
| 49 | : "%r31" |
||
| 191 | decky | 50 | ); |
| 51 | return v; |
||
| 52 | } |
||
| 53 | |||
| 54 | /** Set priority level high |
||
| 55 | * |
||
| 56 | * Disable interrupts and return previous |
||
| 57 | * value of EE. |
||
| 58 | */ |
||
| 59 | static inline pri_t cpu_priority_high(void) { |
||
| 60 | pri_t v; |
||
| 61 | __asm__ volatile ( |
||
| 204 | decky | 62 | "mfmsr %0\n" |
| 63 | "mfmsr %%r31\n" |
||
| 64 | "rlwinm %%r31, %%r31, 0, 17, 15\n" |
||
| 65 | "mtmsr %%r31\n" |
||
| 191 | decky | 66 | : "=r" (v) |
| 204 | decky | 67 | : |
| 68 | : "%r31" |
||
| 191 | decky | 69 | ); |
| 70 | return v; |
||
| 71 | } |
||
| 72 | |||
| 73 | /** Restore priority level |
||
| 74 | * |
||
| 75 | * Restore EE. |
||
| 76 | */ |
||
| 77 | static inline void cpu_priority_restore(pri_t pri) { |
||
| 78 | __asm__ volatile ( |
||
| 204 | decky | 79 | "mfmsr %%r31\n" |
| 80 | "rlwimi %0, %%r31, 0, 17, 15\n" |
||
| 210 | decky | 81 | "cmpw 0, %0, %%r31\n" |
| 82 | "beq 0f\n" |
||
| 204 | decky | 83 | "mtmsr %0\n" |
| 210 | decky | 84 | "0:\n" |
| 204 | decky | 85 | : "=r" (pri) |
| 86 | : "0" (pri) |
||
| 87 | : "%r31" |
||
| 191 | decky | 88 | ); |
| 89 | } |
||
| 90 | |||
| 210 | decky | 91 | /** Return raw priority level |
| 92 | * |
||
| 93 | * Return EE. |
||
| 94 | */ |
||
| 95 | static inline pri_t cpu_priority_read(void) { |
||
| 96 | pri_t v; |
||
| 97 | __asm__ volatile ( |
||
| 98 | "mfmsr %0\n" |
||
| 99 | : "=r" (v) |
||
| 100 | ); |
||
| 101 | return v; |
||
| 102 | } |
||
| 103 | |||
| 173 | jermar | 104 | /* TODO: implement the real stuff */ |
| 105 | static inline __address get_stack_base(void) |
||
| 106 | { |
||
| 107 | return NULL; |
||
| 108 | } |
||
| 109 | |||
| 201 | decky | 110 | void cpu_sleep(void); |
| 111 | void asm_delay_loop(__u32 t); |
||
| 112 | |||
| 173 | jermar | 113 | #endif |