5e49c57956
1)Changes - Rebased the patches for linux-4.4.7 - Added patch to fix spi nor fifo and dma support - Added patch to configure watchdog barktime 2)Testing Tested on IPQ AP148 Board: a. NOR boot and NAND boot b. ethernet network and ath10k wifi c. ubi sysupgrade UnTested dwc3 usb has not been validated on IPQ board(AP148) 3)Known Issues: Once we flash ubi image on AP148, and if we reset the board, uboot on first boot creates PEB and LEB for dynamic sized partitions, which is incorrect and not what linux expects which causes errors when trying to mount rootfs. In order to test this, we can use the below steps: a. Flash the ubi image on board and don't reset the board b. load the kernel fit image in RAM and boot from there. Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org>
144 lines
4.8 KiB
Diff
144 lines
4.8 KiB
Diff
Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: [v3,01/13] ARM: Add Krait L2 register accessor functions
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From: Stephen Boyd <sboyd@codeaurora.org>
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X-Patchwork-Id: 6063051
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Message-Id: <1426920332-9340-2-git-send-email-sboyd@codeaurora.org>
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To: Mike Turquette <mturquette@linaro.org>, Stephen Boyd <sboyd@codeaurora.org>
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Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
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linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
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Viresh Kumar <viresh.kumar@linaro.org>,
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Mark Rutland <mark.rutland@arm.com>, Russell King <linux@arm.linux.org.uk>,
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Courtney Cavin <courtney.cavin@sonymobile.com>
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Date: Fri, 20 Mar 2015 23:45:20 -0700
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Krait CPUs have a handful of L2 cache controller registers that
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live behind a cp15 based indirection register. First you program
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the indirection register (l2cpselr) to point the L2 'window'
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register (l2cpdr) at what you want to read/write. Then you
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read/write the 'window' register to do what you want. The
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l2cpselr register is not banked per-cpu so we must lock around
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accesses to it to prevent other CPUs from re-pointing l2cpdr
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underneath us.
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Cc: Mark Rutland <mark.rutland@arm.com>
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Cc: Russell King <linux@arm.linux.org.uk>
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Cc: Courtney Cavin <courtney.cavin@sonymobile.com>
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Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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---
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arch/arm/common/Kconfig | 3 ++
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arch/arm/common/Makefile | 1 +
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arch/arm/common/krait-l2-accessors.c | 58 +++++++++++++++++++++++++++++++
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arch/arm/include/asm/krait-l2-accessors.h | 20 +++++++++++
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4 files changed, 82 insertions(+)
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create mode 100644 arch/arm/common/krait-l2-accessors.c
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create mode 100644 arch/arm/include/asm/krait-l2-accessors.h
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--- a/arch/arm/common/Kconfig
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+++ b/arch/arm/common/Kconfig
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@@ -9,6 +9,9 @@
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bool
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select ZONE_DMA
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+config KRAIT_L2_ACCESSORS
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+ bool
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+
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config SHARP_LOCOMO
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bool
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--- a/arch/arm/common/Makefile
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+++ b/arch/arm/common/Makefile
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@@ -7,6 +7,7 @@
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obj-$(CONFIG_ICST) += icst.o
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obj-$(CONFIG_SA1111) += sa1111.o
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obj-$(CONFIG_DMABOUNCE) += dmabounce.o
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+obj-$(CONFIG_KRAIT_L2_ACCESSORS) += krait-l2-accessors.o
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obj-$(CONFIG_SHARP_LOCOMO) += locomo.o
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obj-$(CONFIG_SHARP_PARAM) += sharpsl_param.o
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obj-$(CONFIG_SHARP_SCOOP) += scoop.o
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--- /dev/null
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+++ b/arch/arm/common/krait-l2-accessors.c
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@@ -0,0 +1,58 @@
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+/*
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+ * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 and
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+ * only version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#include <linux/spinlock.h>
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+#include <linux/export.h>
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+
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+#include <asm/barrier.h>
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+#include <asm/krait-l2-accessors.h>
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+
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+static DEFINE_RAW_SPINLOCK(krait_l2_lock);
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+
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+void krait_set_l2_indirect_reg(u32 addr, u32 val)
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+{
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+ unsigned long flags;
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+
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+ raw_spin_lock_irqsave(&krait_l2_lock, flags);
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+ /*
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+ * Select the L2 window by poking l2cpselr, then write to the window
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+ * via l2cpdr.
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+ */
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+ asm volatile ("mcr p15, 3, %0, c15, c0, 6 @ l2cpselr" : : "r" (addr));
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+ isb();
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+ asm volatile ("mcr p15, 3, %0, c15, c0, 7 @ l2cpdr" : : "r" (val));
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+ isb();
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+
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+ raw_spin_unlock_irqrestore(&krait_l2_lock, flags);
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+}
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+EXPORT_SYMBOL(krait_set_l2_indirect_reg);
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+
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+u32 krait_get_l2_indirect_reg(u32 addr)
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+{
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+ u32 val;
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+ unsigned long flags;
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+
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+ raw_spin_lock_irqsave(&krait_l2_lock, flags);
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+ /*
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+ * Select the L2 window by poking l2cpselr, then read from the window
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+ * via l2cpdr.
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+ */
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+ asm volatile ("mcr p15, 3, %0, c15, c0, 6 @ l2cpselr" : : "r" (addr));
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+ isb();
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+ asm volatile ("mrc p15, 3, %0, c15, c0, 7 @ l2cpdr" : "=r" (val));
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+
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+ raw_spin_unlock_irqrestore(&krait_l2_lock, flags);
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+
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+ return val;
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+}
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+EXPORT_SYMBOL(krait_get_l2_indirect_reg);
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--- /dev/null
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+++ b/arch/arm/include/asm/krait-l2-accessors.h
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@@ -0,0 +1,20 @@
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+/*
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+ * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 and
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+ * only version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#ifndef __ASMARM_KRAIT_L2_ACCESSORS_H
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+#define __ASMARM_KRAIT_L2_ACCESSORS_H
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+
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+extern void krait_set_l2_indirect_reg(u32 addr, u32 val);
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+extern u32 krait_get_l2_indirect_reg(u32 addr);
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+
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+#endif
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