From: Sjoerd Simons <sjoerd.sim...@collabora.co.uk>
Booting the kernel fails on RK3288 (and probably other rockchip SoCs)
when the i-cache is disabled/flushed before d-cache.
I have not investigated whether this is due to U-Boot hanging or whether
it's very early in the linux boot, but following the approach of the
various rockchip U-Boot forks (first disable d-cache then i-cache) makes
things work.
Signed-off-by: Sjoerd Simons <sjoerd.sim...@collabora.co.uk>
Reviewed-by: Simon Glass <s...@chromium.org>
Signed-off-by: Simon Glass <s...@chromium.org>
---
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
arch/arm/cpu/armv7/cpu.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/arch/arm/cpu/armv7/cpu.c b/arch/arm/cpu/armv7/cpu.c
index 0b0e500..6eac5ef 100644
--- a/arch/arm/cpu/armv7/cpu.c
+++ b/arch/arm/cpu/armv7/cpu.c
@@ -36,12 +36,6 @@ int cleanup_before_linux_select(int flags)
disable_interrupts();
#endif
- /*
- * Turn off I-cache and invalidate it
- */
- icache_disable();
- invalidate_icache_all();
-
if (flags & CBL_DISABLE_CACHES) {
/*
* turn off D-cache
@@ -61,7 +55,16 @@ int cleanup_before_linux_select(int flags)
* to avoid coherency problems for kernel
*/
invalidate_dcache_all();
+
+ icache_disable();
+ invalidate_icache_all();
} else {
+ /*
+ * Turn off I-cache and invalidate it
+ */
+ icache_disable();
+ invalidate_icache_all();
+
flush_dcache_all();
invalidate_icache_all();
icache_enable();
--
2.5.0.457.gab17608
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