diff options
Diffstat (limited to 'arch/arm/mach-exynos/ppc.c')
-rw-r--r-- | arch/arm/mach-exynos/ppc.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/ppc.c b/arch/arm/mach-exynos/ppc.c new file mode 100644 index 0000000..8c97b1a --- /dev/null +++ b/arch/arm/mach-exynos/ppc.c @@ -0,0 +1,74 @@ +/* linux/arch/arm/mach-exynos/ppc.c + * + * Copyright (c) 2010 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * EXYNOS4 - PPMU support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/err.h> +#include <linux/io.h> + +#include <mach/map.h> +#include <mach/regs-clock.h> +#include <mach/ppmu.h> + +void exynos4_ppc_reset(struct exynos4_ppmu_hw *ppmu) +{ + void __iomem *ppmu_base = ppmu->hw_base; + int i; + + __raw_writel(0x8000000f, ppmu_base + 0xf010); + __raw_writel(0x8000000f, ppmu_base + 0xf050); + __raw_writel(0x6, ppmu_base + 0xf000); + __raw_writel(0x0, ppmu_base + 0xf100); + + ppmu->ccnt = 0; + for (i = 0; i < NUMBER_OF_COUNTER; i++) + ppmu->count[i] = 0; +} + +void exynos4_ppc_setevent(struct exynos4_ppmu_hw *ppmu, + unsigned int evt) +{ + void __iomem *ppmu_base = ppmu->hw_base; + + ppmu->event[0] = evt; + + __raw_writel(((evt << 12) | 0x1), ppmu_base + 0xfc); +} + +void exynos4_ppc_start(struct exynos4_ppmu_hw *ppmu) +{ + void __iomem *ppmu_base = ppmu->hw_base; + + __raw_writel(0x1, ppmu_base + 0xf000); +} + +void exynos4_ppc_stop(struct exynos4_ppmu_hw *ppmu) +{ + void __iomem *ppmu_base = ppmu->hw_base; + + __raw_writel(0x0, ppmu_base + 0xf000); +} + +unsigned long long exynos4_ppc_update(struct exynos4_ppmu_hw *ppmu) +{ + void __iomem *ppmu_base = ppmu->hw_base; + unsigned int i; + + ppmu->ccnt = __raw_readl(ppmu_base + 0xf100); + + for (i = 0; i < NUMBER_OF_COUNTER; i++) + ppmu->count[i] = + __raw_readl(ppmu_base + (0xf110 + (0x10 * i))); + + return 0; +} + |