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6ccce699 AK |
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 | } |