diff options
Diffstat (limited to 'target/linux/ipq806x/patches-5.4/0034-0001-ARM-Add-Krait-L2-register-accessor-functions.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-5.4/0034-0001-ARM-Add-Krait-L2-register-accessor-functions.patch | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/target/linux/ipq806x/patches-5.4/0034-0001-ARM-Add-Krait-L2-register-accessor-functions.patch b/target/linux/ipq806x/patches-5.4/0034-0001-ARM-Add-Krait-L2-register-accessor-functions.patch deleted file mode 100644 index 68acbeeec2..0000000000 --- a/target/linux/ipq806x/patches-5.4/0034-0001-ARM-Add-Krait-L2-register-accessor-functions.patch +++ /dev/null @@ -1,115 +0,0 @@ -From 36d68f64c411e09788687d5919886aadeb92adca Mon Sep 17 00:00:00 2001 -From: Stephen Boyd <sboyd@codeaurora.org> -Date: Tue, 14 Aug 2018 17:42:20 +0530 -Subject: [PATCH 01/12] ARM: Add Krait L2 register accessor functions - -Krait CPUs have a handful of L2 cache controller registers that -live behind a cp15 based indirection register. First you program -the indirection register (l2cpselr) to point the L2 'window' -register (l2cpdr) at what you want to read/write. Then you -read/write the 'window' register to do what you want. The -l2cpselr register is not banked per-cpu so we must lock around -accesses to it to prevent other CPUs from re-pointing l2cpdr -underneath us. - -Cc: Mark Rutland <mark.rutland@arm.com> -Cc: Russell King <linux@arm.linux.org.uk> -Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> -Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> -Signed-off-by: Sricharan R <sricharan@codeaurora.org> -Tested-by: Craig Tatlor <ctatlor97@gmail.com> -Signed-off-by: Stephen Boyd <sboyd@kernel.org> ---- - arch/arm/common/Kconfig | 3 ++ - arch/arm/common/Makefile | 1 + - arch/arm/common/krait-l2-accessors.c | 48 +++++++++++++++++++++++ - arch/arm/include/asm/krait-l2-accessors.h | 9 +++++ - 4 files changed, 61 insertions(+) - create mode 100644 arch/arm/common/krait-l2-accessors.c - create mode 100644 arch/arm/include/asm/krait-l2-accessors.h - ---- a/arch/arm/common/Kconfig -+++ b/arch/arm/common/Kconfig -@@ -7,6 +7,9 @@ config DMABOUNCE - bool - select ZONE_DMA - -+config KRAIT_L2_ACCESSORS -+ bool -+ - config SHARP_LOCOMO - bool - ---- a/arch/arm/common/Makefile -+++ b/arch/arm/common/Makefile -@@ -7,6 +7,7 @@ obj-y += firmware.o - - obj-$(CONFIG_SA1111) += sa1111.o - obj-$(CONFIG_DMABOUNCE) += dmabounce.o -+obj-$(CONFIG_KRAIT_L2_ACCESSORS) += krait-l2-accessors.o - obj-$(CONFIG_SHARP_LOCOMO) += locomo.o - obj-$(CONFIG_SHARP_PARAM) += sharpsl_param.o - obj-$(CONFIG_SHARP_SCOOP) += scoop.o ---- /dev/null -+++ b/arch/arm/common/krait-l2-accessors.c -@@ -0,0 +1,48 @@ -+// SPDX-License-Identifier: GPL-2.0 -+// Copyright (c) 2018, The Linux Foundation. All rights reserved. -+ -+#include <linux/spinlock.h> -+#include <linux/export.h> -+ -+#include <asm/barrier.h> -+#include <asm/krait-l2-accessors.h> -+ -+static DEFINE_RAW_SPINLOCK(krait_l2_lock); -+ -+void krait_set_l2_indirect_reg(u32 addr, u32 val) -+{ -+ unsigned long flags; -+ -+ raw_spin_lock_irqsave(&krait_l2_lock, flags); -+ /* -+ * Select the L2 window by poking l2cpselr, then write to the window -+ * via l2cpdr. -+ */ -+ asm volatile ("mcr p15, 3, %0, c15, c0, 6 @ l2cpselr" : : "r" (addr)); -+ isb(); -+ asm volatile ("mcr p15, 3, %0, c15, c0, 7 @ l2cpdr" : : "r" (val)); -+ isb(); -+ -+ raw_spin_unlock_irqrestore(&krait_l2_lock, flags); -+} -+EXPORT_SYMBOL(krait_set_l2_indirect_reg); -+ -+u32 krait_get_l2_indirect_reg(u32 addr) -+{ -+ u32 val; -+ unsigned long flags; -+ -+ raw_spin_lock_irqsave(&krait_l2_lock, flags); -+ /* -+ * Select the L2 window by poking l2cpselr, then read from the window -+ * via l2cpdr. -+ */ -+ asm volatile ("mcr p15, 3, %0, c15, c0, 6 @ l2cpselr" : : "r" (addr)); -+ isb(); -+ asm volatile ("mrc p15, 3, %0, c15, c0, 7 @ l2cpdr" : "=r" (val)); -+ -+ raw_spin_unlock_irqrestore(&krait_l2_lock, flags); -+ -+ return val; -+} -+EXPORT_SYMBOL(krait_get_l2_indirect_reg); ---- /dev/null -+++ b/arch/arm/include/asm/krait-l2-accessors.h -@@ -0,0 +1,9 @@ -+/* SPDX-License-Identifier: GPL-2.0 */ -+ -+#ifndef __ASMARM_KRAIT_L2_ACCESSORS_H -+#define __ASMARM_KRAIT_L2_ACCESSORS_H -+ -+extern void krait_set_l2_indirect_reg(u32 addr, u32 val); -+extern u32 krait_get_l2_indirect_reg(u32 addr); -+ -+#endif |