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From:   Jiaxun Yang <jiaxun.yang@flygoat.com>
To:     linux-mips@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, tsbogend@alpha.franken.de,
        gregory.clement@bootlin.com, vladimir.kondratiev@intel.com,
        Jiaxun Yang <jiaxun.yang@flygoat.com>
Subject: [PATCH 5/5] MIPS: Allow kernel base to be set from Kconfig for all platforms
Date:   Mon, 23 Oct 2023 20:14:00 +0100
Message-Id: <20231023191400.170052-6-jiaxun.yang@flygoat.com>
In-Reply-To: <20231023191400.170052-1-jiaxun.yang@flygoat.com>
References: <20231023191400.170052-1-jiaxun.yang@flygoat.com>
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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 bc8421859006..bfedc8b48a81 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2884,12 +2884,22 @@ 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
-- 
2.34.1