projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| c2f02da2 DH |
1 | /* |
| 2 | * (C) Copyright 2000-2002 | |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
| 4 | * | |
| 5 | * (C) Copyright 2003 | |
| 6 | * Gleb Natapov <gnatapov@mrv.com> | |
| 7 | * | |
| 8 | * (C) Copyright 2007 | |
| 9 | * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com. | |
| 10 | * | |
| 11 | * See file CREDITS for list of people who contributed to this | |
| 12 | * project. | |
| 13 | * | |
| 14 | * This program is free software; you can redistribute it and/or | |
| 15 | * modify it under the terms of the GNU General Public License as | |
| 16 | * published by the Free Software Foundation; either version 2 of | |
| 17 | * the License, or (at your option) any later version. | |
| 18 | * | |
| 19 | * This program is distributed in the hope that it will be useful, | |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 22 | * GNU General Public License for more details. | |
| 23 | * | |
| 24 | * You should have received a copy of the GNU General Public License | |
| 25 | * along with this program; if not, write to the Free Software | |
| 26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
| 27 | * MA 02111-1307 USA | |
| 28 | */ | |
| 29 | ||
| 30 | #include <common.h> | |
| 31 | #include <asm/processor.h> | |
| 32 | #include <asm/irq.h> | |
| 33 | ||
| 34 | /* Implemented by SPARC CPUs */ | |
| 35 | extern int interrupt_init_cpu(void); | |
| 36 | extern void timer_interrupt_cpu(void *arg); | |
| 37 | extern int timer_interrupt_init_cpu(void); | |
| 38 | ||
| 39 | int intLock(void) | |
| 40 | { | |
| 41 | unsigned int pil; | |
| 42 | ||
| 43 | pil = get_pil(); | |
| 44 | ||
| 45 | /* set PIL to 15 ==> no pending interrupts will interrupt CPU */ | |
| 46 | set_pil(15); | |
| 47 | ||
| 48 | return pil; | |
| 49 | } | |
| 50 | ||
| 51 | void intUnlock(int oldLevel) | |
| 52 | { | |
| 53 | set_pil(oldLevel); | |
| 54 | } | |
| 55 | ||
| 56 | void enable_interrupts(void) | |
| 57 | { | |
| 58 | set_pil(0); /* enable all interrupts */ | |
| 59 | } | |
| 60 | ||
| 61 | int disable_interrupts(void) | |
| 62 | { | |
| 63 | return intLock(); | |
| 64 | } | |
| 65 | ||
| 66 | int interrupt_init(void) | |
| 67 | { | |
| 68 | int ret; | |
| 69 | ||
| 70 | /* call cpu specific function from $(CPU)/interrupts.c */ | |
| 71 | ret = interrupt_init_cpu(); | |
| 72 | ||
| 73 | /* enable global interrupts */ | |
| 74 | enable_interrupts(); | |
| 75 | ||
| 76 | return ret; | |
| 77 | } | |
| 78 | ||
| 79 | /* timer interrupt/overflow counter */ | |
| 80 | static volatile ulong timestamp = 0; | |
| 81 | ||
| 82 | /* regs can not be used here! regs is actually the pointer given in | |
| 83 | * irq_install_handler | |
| 84 | */ | |
| 85 | void timer_interrupt(struct pt_regs *regs) | |
| 86 | { | |
| 87 | /* call cpu specific function from $(CPU)/interrupts.c */ | |
| 88 | timer_interrupt_cpu((void *)regs); | |
| 89 | ||
| 90 | timestamp++; | |
| 91 | } | |
| 92 | ||
| 93 | void reset_timer(void) | |
| 94 | { | |
| 95 | timestamp = 0; | |
| 96 | } | |
| 97 | ||
| 98 | ulong get_timer(ulong base) | |
| 99 | { | |
| 100 | return (timestamp - base); | |
| 101 | } | |
| 102 | ||
| 103 | void set_timer(ulong t) | |
| 104 | { | |
| 105 | timestamp = t; | |
| 106 | } | |
| 107 | ||
| 108 | void timer_interrupt_init(void) | |
| 109 | { | |
| 110 | int irq; | |
| 111 | ||
| 112 | reset_timer(); | |
| 113 | ||
| 114 | irq = timer_interrupt_init_cpu(); | |
| 115 | ||
| 116 | if (irq < 0) { | |
| 117 | /* cpu specific code handled the interrupt registration it self */ | |
| 118 | return; | |
| 119 | } | |
| 120 | /* register interrupt handler for timer */ | |
| 121 | irq_install_handler(irq, (void (*)(void *))timer_interrupt, NULL); | |
| 122 | } |