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From:   Gregory CLEMENT <gregory.clement@bootlin.com>
To:     Paul Burton <paulburton@kernel.org>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        linux-mips@vger.kernel.org, Jiaxun Yang <jiaxun.yang@flygoat.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>,
        Tawfik Bayouk <tawfik.bayouk@mobileye.com>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        =?UTF-8?q?Th=C3=A9o=20Lebrun?= <theo.lebrun@bootlin.com>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: [PATCH v4 08/22] MIPS: Allow kernel base to be set from Kconfig for all platforms
Date:   Fri,  8 Dec 2023 17:12:24 +0100
Message-ID: <20231208161249.1827174-9-gregory.clement@bootlin.com>
In-Reply-To: <20231208161249.1827174-1-gregory.clement@bootlin.com>
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From: Jiaxun Yang <jiaxun.yang@flygoat.com>

There are some platforms in wild that generic loading address won't
work with them due to memory layout.

Allow PHYSICAL_START to be override from Kconfig, introduce
PHYSICAL_START_BOOL symbol as powerpc did.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 arch/mips/Kconfig | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index fad05f699efdf..11bacbd3971f6 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2866,12 +2866,22 @@ config ARCH_SUPPORTS_KEXEC
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool y
 
+config PHYSICAL_START_BOOL
+	bool "Set physical address where the kernel is loaded"
+	default y if CRASH_DUMP
+	help
+	  This gives the CKSEG0, KSEG0 or XKPHYS address where the kernel
+	  is loaded.
+
+	  Say N here unless you know what you are doing.
+
 config PHYSICAL_START
-	hex "Physical address where the kernel is loaded"
-	default "0xffffffff84000000"
-	depends on CRASH_DUMP
+	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
+	default "0xffffffff84000000" if CRASH_DUMP
+	default "0xffffffff80100000"
 	help
-	  This gives the CKSEG0 or KSEG0 address where the kernel is loaded.
+	  This gives the CKSEG0, KSEG0 or XKPHYS address where the kernel
+	  is loaded.
 	  If you plan to use kernel for capturing the crash dump change
 	  this value to start of the reserved region (the "X" value as
 	  specified in the "crashkernel=YM@XM" command line boot parameter
-- 
2.42.0