2022-10-18 21:49:18 +00:00
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From 9c896e9fc2ef1209e4a56d8c9fdd183847c2c814 Mon Sep 17 00:00:00 2001
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From: Christian Marangi <ansuelsmth@gmail.com>
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Date: Tue, 18 Oct 2022 22:02:46 +0200
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Subject: [PATCH] ARM: mach-qcom: fix support for ipq806x
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Add a specific config flag for Qcom IPQ806x as this SoC can't use
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AUTO_ZRELADDR and require the PHYS_OFFSET set to 0x42000000.
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This is needed as some legacy board (or some wrongly configured
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bootloader) pass the wrong memory map and doesn't exclude the first
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~20MB of RAM reserved for the hardware network accellerators.
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With this change we can correctly support each board and prevent any
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kind of misconfiguration done by the OEM.
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Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
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---
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arch/arm/Kconfig | 3 ++-
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arch/arm/mach-qcom/Kconfig | 13 +++++++++++++
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2 files changed, 15 insertions(+), 1 deletion(-)
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--- a/arch/arm/Kconfig
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+++ b/arch/arm/Kconfig
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2023-08-08 23:55:51 +00:00
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@@ -285,6 +285,7 @@ config PHYS_OFFSET
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2022-10-18 21:49:18 +00:00
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default 0x30000000 if ARCH_S3C24XX
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default 0xa0000000 if ARCH_IOP32X || ARCH_PXA
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default 0xc0000000 if ARCH_EP93XX || ARCH_SA1100
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+ default 0x42000000 if ARCH_IPQ806X
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default 0
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help
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Please provide the physical address corresponding to the
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2023-08-08 23:55:51 +00:00
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@@ -1704,7 +1705,7 @@ config CRASH_DUMP
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2022-10-18 21:49:18 +00:00
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config AUTO_ZRELADDR
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bool "Auto calculation of the decompressed kernel image address" if !ARCH_MULTIPLATFORM
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- default !(ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100)
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+ default !(ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100 || ARCH_IPQ806X)
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help
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ZRELADDR is the physical address where the decompressed kernel
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image will be placed. If AUTO_ZRELADDR is selected, the address
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--- a/arch/arm/mach-qcom/Kconfig
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+++ b/arch/arm/mach-qcom/Kconfig
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@@ -46,4 +46,17 @@ config ARCH_MDM9615
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bool "Enable support for MDM9615"
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select CLKSRC_QCOM
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+config ARCH_IPQ806X
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+ bool "Enable support for IPQ806x"
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+ help
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+ Enable support for the Qualcomm IPQ806x.
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+
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+ IPQ806x require special PHYS_OFFSET and can't use AUTO_ZRELADDR.
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+ The first ~20MB of RAM is reserved for the hardware network accelerators,
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+ and the bootloader removes this section from the layout passed from the
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+ ATAGS (when used by some bootloader doesn't even do that).
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+
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+ To support every system and handle legacy systems, hardcode PHYS_OFFSET and
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+ disable AUTO_ZRELADDR.
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+
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endif
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