From: Wenyou Yang <wenyou.yang@atmel.com> To: <nicolas.ferre@atmel.com>, <linux@arm.linux.org.uk> Cc: <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <alexandre.belloni@free-electrons.com>, <sylvain.rochet@finsecur.com>, <peda@axentia.se>, <wenyou.yang@atmel.com>, <Patrice.VILCHEZ@atmel.com> Subject: [PATCH 4/7] ARM: at91: enable the L2 Cache controller Date: Mon, 26 Jan 2015 18:07:16 +0800 [thread overview] Message-ID: <1422266836-24592-1-git-send-email-wenyou.yang@atmel.com> (raw) In-Reply-To: <1422266617-24381-1-git-send-email-wenyou.yang@atmel.com> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> --- arch/arm/mach-at91/board-dt-sama5.c | 53 +++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/arch/arm/mach-at91/board-dt-sama5.c b/arch/arm/mach-at91/board-dt-sama5.c index 86cffcd..ed6db28 100644 --- a/arch/arm/mach-at91/board-dt-sama5.c +++ b/arch/arm/mach-at91/board-dt-sama5.c @@ -17,17 +17,70 @@ #include <linux/of_platform.h> #include <linux/phy.h> #include <linux/clk-provider.h> +#include <linux/of_address.h> #include <asm/setup.h> #include <asm/irq.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> #include <asm/mach/irq.h> +#include <asm/hardware/cache-l2x0.h> #include "generic.h" +void __iomem *at91_l2cc_base; +EXPORT_SYMBOL_GPL(at91_l2cc_base); + +#ifdef CONFIG_CACHE_L2X0 +static void __init at91_init_l2cache(void) +{ + struct device_node *np; + u32 reg; + + np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache"); + if (!np) + return; + + at91_l2cc_base = of_iomap(np, 0); + if (!at91_l2cc_base) + panic("unable to map l2cc cpu registers\n"); + + of_node_put(np); + + /* Disable cache if it hasn't been done yet */ + if (readl_relaxed(at91_l2cc_base + L2X0_CTRL) & L2X0_CTRL_EN) + writel_relaxed(~L2X0_CTRL_EN, at91_l2cc_base + L2X0_CTRL); + + /* Prefetch Control */ + reg = readl_relaxed(at91_l2cc_base + L310_PREFETCH_CTRL); + reg &= ~L310_PREFETCH_CTRL_OFFSET_MASK; + reg |= 0x01; + reg |= L310_PREFETCH_CTRL_DBL_LINEFILL_INCR; + reg |= L310_PREFETCH_CTRL_PREFETCH_DROP; + reg |= L310_PREFETCH_CTRL_DATA_PREFETCH; + reg |= L310_PREFETCH_CTRL_INSTR_PREFETCH; + reg |= L310_PREFETCH_CTRL_DBL_LINEFILL; + writel_relaxed(reg, at91_l2cc_base + L310_PREFETCH_CTRL); + + /* Power Control */ + reg = readl_relaxed(at91_l2cc_base + L310_POWER_CTRL); + reg |= L310_STNDBY_MODE_EN; + reg |= L310_DYNAMIC_CLK_GATING_EN; + writel_relaxed(reg, at91_l2cc_base + L310_POWER_CTRL); + + /* Disable interrupts */ + writel_relaxed(0x00, at91_l2cc_base + L2X0_INTR_MASK); + writel_relaxed(0x01ff, at91_l2cc_base + L2X0_INTR_CLEAR); + l2x0_of_init(0, ~0UL); +} +#else +static inline void at91_init_l2cache(void) {} +#endif + static void __init sama5_dt_device_init(void) { + at91_init_l2cache(); + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); at91_sam9x5_pm_init(); } -- 1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: wenyou.yang@atmel.com (Wenyou Yang) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 4/7] ARM: at91: enable the L2 Cache controller Date: Mon, 26 Jan 2015 18:07:16 +0800 [thread overview] Message-ID: <1422266836-24592-1-git-send-email-wenyou.yang@atmel.com> (raw) In-Reply-To: <1422266617-24381-1-git-send-email-wenyou.yang@atmel.com> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> --- arch/arm/mach-at91/board-dt-sama5.c | 53 +++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/arch/arm/mach-at91/board-dt-sama5.c b/arch/arm/mach-at91/board-dt-sama5.c index 86cffcd..ed6db28 100644 --- a/arch/arm/mach-at91/board-dt-sama5.c +++ b/arch/arm/mach-at91/board-dt-sama5.c @@ -17,17 +17,70 @@ #include <linux/of_platform.h> #include <linux/phy.h> #include <linux/clk-provider.h> +#include <linux/of_address.h> #include <asm/setup.h> #include <asm/irq.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> #include <asm/mach/irq.h> +#include <asm/hardware/cache-l2x0.h> #include "generic.h" +void __iomem *at91_l2cc_base; +EXPORT_SYMBOL_GPL(at91_l2cc_base); + +#ifdef CONFIG_CACHE_L2X0 +static void __init at91_init_l2cache(void) +{ + struct device_node *np; + u32 reg; + + np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache"); + if (!np) + return; + + at91_l2cc_base = of_iomap(np, 0); + if (!at91_l2cc_base) + panic("unable to map l2cc cpu registers\n"); + + of_node_put(np); + + /* Disable cache if it hasn't been done yet */ + if (readl_relaxed(at91_l2cc_base + L2X0_CTRL) & L2X0_CTRL_EN) + writel_relaxed(~L2X0_CTRL_EN, at91_l2cc_base + L2X0_CTRL); + + /* Prefetch Control */ + reg = readl_relaxed(at91_l2cc_base + L310_PREFETCH_CTRL); + reg &= ~L310_PREFETCH_CTRL_OFFSET_MASK; + reg |= 0x01; + reg |= L310_PREFETCH_CTRL_DBL_LINEFILL_INCR; + reg |= L310_PREFETCH_CTRL_PREFETCH_DROP; + reg |= L310_PREFETCH_CTRL_DATA_PREFETCH; + reg |= L310_PREFETCH_CTRL_INSTR_PREFETCH; + reg |= L310_PREFETCH_CTRL_DBL_LINEFILL; + writel_relaxed(reg, at91_l2cc_base + L310_PREFETCH_CTRL); + + /* Power Control */ + reg = readl_relaxed(at91_l2cc_base + L310_POWER_CTRL); + reg |= L310_STNDBY_MODE_EN; + reg |= L310_DYNAMIC_CLK_GATING_EN; + writel_relaxed(reg, at91_l2cc_base + L310_POWER_CTRL); + + /* Disable interrupts */ + writel_relaxed(0x00, at91_l2cc_base + L2X0_INTR_MASK); + writel_relaxed(0x01ff, at91_l2cc_base + L2X0_INTR_CLEAR); + l2x0_of_init(0, ~0UL); +} +#else +static inline void at91_init_l2cache(void) {} +#endif + static void __init sama5_dt_device_init(void) { + at91_init_l2cache(); + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); at91_sam9x5_pm_init(); } -- 1.7.9.5
next prev parent reply other threads:[~2015-01-26 10:08 UTC|newest] Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-01-26 10:03 [PATCH 0/7] AT91 pm improvements for 3.20 Wenyou Yang 2015-01-26 10:03 ` Wenyou Yang 2015-01-26 10:04 ` [PATCH 1/7] pm: at91: achieve the memory controller's type from the dts file Wenyou Yang 2015-01-26 10:04 ` Wenyou Yang 2015-01-26 10:06 ` [PATCH 2/7] pm: at91: pm_suspend: add the WFI support for ARMv7 Wenyou Yang 2015-01-26 10:06 ` Wenyou Yang 2015-01-26 13:05 ` Sergei Shtylyov 2015-01-26 13:05 ` Sergei Shtylyov 2015-01-27 4:44 ` Yang, Wenyou 2015-01-27 4:44 ` Yang, Wenyou 2015-01-28 11:25 ` Lorenzo Pieralisi 2015-01-28 11:25 ` Lorenzo Pieralisi 2015-01-29 2:36 ` Yang, Wenyou 2015-01-29 2:36 ` Yang, Wenyou 2015-01-29 12:22 ` Lorenzo Pieralisi 2015-01-29 12:22 ` Lorenzo Pieralisi 2015-01-30 7:23 ` Yang, Wenyou 2015-01-30 7:23 ` Yang, Wenyou 2015-01-30 10:17 ` Lorenzo Pieralisi 2015-01-30 10:17 ` Lorenzo Pieralisi 2015-01-30 10:44 ` Lorenzo Pieralisi 2015-01-30 10:44 ` Lorenzo Pieralisi 2015-01-26 10:06 ` [PATCH 3/7] pm: at91: pm_suspend: MOR register KEY was missing Wenyou Yang 2015-01-26 10:06 ` Wenyou Yang 2015-01-26 10:07 ` Wenyou Yang [this message] 2015-01-26 10:07 ` [PATCH 4/7] ARM: at91: enable the L2 Cache controller Wenyou Yang 2015-01-26 11:46 ` Mark Rutland 2015-01-26 11:46 ` Mark Rutland 2015-01-26 12:45 ` Russell King - ARM Linux 2015-01-26 12:45 ` Russell King - ARM Linux 2015-01-26 22:36 ` Alexandre Belloni 2015-01-26 22:36 ` Alexandre Belloni 2015-01-27 5:11 ` Yang, Wenyou 2015-01-27 5:11 ` Yang, Wenyou 2015-01-26 10:07 ` [PATCH 5/7] pm: at91: add disable/enable the L1/L2 cache while suspend/resume Wenyou Yang 2015-01-26 10:07 ` Wenyou Yang 2015-01-26 10:08 ` [PATCH 6/7] pm: at91: add achieve the mpddrc peripheral ID and the DDR clock ID support Wenyou Yang 2015-01-26 10:08 ` Wenyou Yang 2015-01-26 11:49 ` Mark Rutland 2015-01-26 11:49 ` Mark Rutland 2015-01-27 5:24 ` Yang, Wenyou 2015-01-27 5:24 ` Yang, Wenyou 2015-01-26 10:08 ` [PATCH 7/7] pm: at91: add disable/enable the mpddrc's clock and DDR clock support Wenyou Yang 2015-01-26 10:08 ` Wenyou Yang
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