[U-Boot] [PATCH] MIPS: add compile time definition of L2 cache size

[Ramon Fried <rfried.dev@gmail.com>]

If configuration is set to skip low level init, automatic
probe of L2 cache size is not performed and the size is set to 0.
Flushing or invalidating the L2 cache will fail in this case.

Add a static configuration (SYS_DCACHE_LINE_SIZE) with default set to 0.

Signed-off-by: Ramon Fried <rfried.dev@gmail.com>
---
 arch/mips/Kconfig     | 10 +++++++++-
 arch/mips/lib/cache.c |  2 +-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 5cb9bdf2ee..235bb5b7e6 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -408,9 +408,17 @@ config SYS_ICACHE_LINE_SIZE
 	help
 	  The size of L1 Icache lines, if known at compile time.
 
+config SYS_SCACHE_LINE_SIZE
+	int
+	default 0
+	help
+	  The size of L2 cache lines, if known at compile time.
+
+
 config SYS_CACHE_SIZE_AUTO
 	def_bool y if SYS_DCACHE_SIZE = 0 && SYS_ICACHE_SIZE = 0 && \
-		SYS_DCACHE_LINE_SIZE = 0 && SYS_ICACHE_LINE_SIZE = 0
+		SYS_DCACHE_LINE_SIZE = 0 && SYS_ICACHE_LINE_SIZE = 0 && \
+		SYS_SCACHE_LINE_SIZE = 0
 	help
 	  Select this (or let it be auto-selected by not defining any cache
 	  sizes) in order to allow U-Boot to automatically detect the sizes
diff --git a/arch/mips/lib/cache.c b/arch/mips/lib/cache.c
index d56fd1e0f4..0ddae30f2c 100644
--- a/arch/mips/lib/cache.c
+++ b/arch/mips/lib/cache.c
@@ -87,7 +87,7 @@ static inline unsigned long scache_line_size(void)
 #ifdef CONFIG_MIPS_L2_CACHE
 	return gd->arch.l2_line_size;
 #else
-	return 0;
+	return CONFIG_SYS_SCACHE_LINE_SIZE;
 #endif
 }
 
-- 
2.21.0