Abhilash Kesavan | 6ccce69 | 2013-02-04 17:44:48 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| 3 | * http://www.samsung.com/ |
| 4 | * |
| 5 | * EXYNOS - PPMU support |
| 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 version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/io.h> |
| 15 | |
| 16 | #include "exynos_ppmu.h" |
| 17 | |
| 18 | void exynos_ppmu_reset(void __iomem *ppmu_base) |
| 19 | { |
| 20 | __raw_writel(PPMU_CYCLE_RESET | PPMU_COUNTER_RESET, ppmu_base); |
| 21 | __raw_writel(PPMU_ENABLE_CYCLE | |
| 22 | PPMU_ENABLE_COUNT0 | |
| 23 | PPMU_ENABLE_COUNT1 | |
| 24 | PPMU_ENABLE_COUNT2 | |
| 25 | PPMU_ENABLE_COUNT3, |
| 26 | ppmu_base + PPMU_CNTENS); |
| 27 | } |
| 28 | |
| 29 | void exynos_ppmu_setevent(void __iomem *ppmu_base, unsigned int ch, |
| 30 | unsigned int evt) |
| 31 | { |
| 32 | __raw_writel(evt, ppmu_base + PPMU_BEVTSEL(ch)); |
| 33 | } |
| 34 | |
| 35 | void exynos_ppmu_start(void __iomem *ppmu_base) |
| 36 | { |
| 37 | __raw_writel(PPMU_ENABLE, ppmu_base); |
| 38 | } |
| 39 | |
| 40 | void exynos_ppmu_stop(void __iomem *ppmu_base) |
| 41 | { |
| 42 | __raw_writel(PPMU_DISABLE, ppmu_base); |
| 43 | } |
| 44 | |
| 45 | unsigned int exynos_ppmu_read(void __iomem *ppmu_base, unsigned int ch) |
| 46 | { |
| 47 | unsigned int total; |
| 48 | |
| 49 | if (ch == PPMU_PMNCNT3) |
| 50 | total = ((__raw_readl(ppmu_base + PMCNT_OFFSET(ch)) << 8) | |
| 51 | __raw_readl(ppmu_base + PMCNT_OFFSET(ch + 1))); |
| 52 | else |
| 53 | total = __raw_readl(ppmu_base + PMCNT_OFFSET(ch)); |
| 54 | |
| 55 | return total; |
| 56 | } |