On 8/9/22 13:32, Pali Rohár wrote:
On Tuesday 09 August 2022 13:27:38 Marek Vasut wrote:
On 8/9/22 13:21, Pali Rohár wrote:
(reducing the CC list)
On Tuesday 09 August 2022 13:16:41 Marek Vasut wrote:
On 8/9/22 12:58, Pali Rohár wrote:
On Tuesday 09 August 2022 12:07:00 Philip Oberfichtner wrote:
This converts CONFIG_SYS_L2_PL310 to Kconfig.
...
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 949ebb46ba..dde06bdd96 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -488,6 +488,10 @@ config TPL_SYS_THUMB_BUILD
density. For ARM architectures that support Thumb2 this flag will
result in Thumb2 code generated by GCC.
+config SYS_L2_PL310
+ bool "ARM PL310 L2 cache controller"
+ help
+ Enable support for ARM PL310 L2 cache controller in U-Boot
config SYS_L2CACHE_OFF
bool "L2cache off"
diff --git a/arch/arm/mach-mvebu/include/mach/config.h
b/arch/arm/mach-mvebu/include/mach/config.h
index 4add0d9e10..0bba0a4cf9 100644
--- a/arch/arm/mach-mvebu/include/mach/config.h
+++ b/arch/arm/mach-mvebu/include/mach/config.h
@@ -25,8 +25,6 @@
#define MV88F78X60 /* for the DDR training bin_hdr code */
#endif
-#define CONFIG_SYS_L2_PL310
-
#define MV_UART_CONSOLE_BASE MVEBU_UART0_BASE
/* Needed for SPI NOR booting in SPL */
This option is required for mvebu SoC and is not user (de)-selectable.
So please do not define it in each individual mvebu board. It would make
it harder to introduce a new mvebu board into U-Boot. Instead enable it
for mvebu SoCs like it was before this change. It can be done e.g. by
"select" Kconfig keyword in mvebu Kconfig file.
Should it rather be 'default y if MVEBU' in that new PL310 Kconfig option ?
No, because this is just default value of this option and still allows
end-user to de-select this option.
"select" is IIRC the only way how to force Kconfig to always enable some
symbol without any option for end-user to disable it.
At least I do not know a way how CONFIG_SYS_L2_PL310 symbol could decide
that it is required for CONFIG_MVEBU. Just symbol CONFIG_MVEBU can
decide that it requires CONFIG_SYS_L2_PL310 symbol (and not in opposite
direction).
So why should the user be unable to deselect L2CC support on MVEBU ?
I can very well disable L2CC support on MX6 and the platform works without
it just fine. Maybe the MVEBU needs to be fixed to support the same instead
?
Well, I'm not sure, currently it is non-deselectable option. Maybe it is
a bug... but at least change which is doing kconfig conversion should
not change behavior.
I agree -- I think your proposal to make this non-user-configurable is
changing the behavior, see:
Before -- you could comment the entry in include/configs/board.h out to
deselect an option.
After -- you can flip Kconfig switch to deselect an option.
