| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * linux/arch/arm/plat-versatile/sched-clock.c |
| 3 | * |
| 4 | * Copyright (C) 1999 - 2003 ARM Limited |
| 5 | * Copyright (C) 2000 Deep Blue Solutions Ltd |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/io.h> |
| 23 | #include <linux/sched_clock.h> |
| 24 | |
| 25 | #include <plat/sched_clock.h> |
| 26 | |
| 27 | static void __iomem *ctr; |
| 28 | |
| 29 | static u64 notrace versatile_read_sched_clock(void) |
| 30 | { |
| 31 | if (ctr) |
| 32 | return readl(ctr); |
| 33 | |
| 34 | return 0; |
| 35 | } |
| 36 | |
| 37 | void __init versatile_sched_clock_init(void __iomem *reg, unsigned long rate) |
| 38 | { |
| 39 | ctr = reg; |
| 40 | sched_clock_register(versatile_read_sched_clock, 32, rate); |
| 41 | } |