[PATCH v2 08/21] MIPS: Allow kernel base to be set from Kconfig for all platforms

Gregory CLEMENT
2023-11-23T15:27:02Z

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 76db82542519c..f7fa4f231c6c6 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2862,12 +2862,22 @@ 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