[U-Boot] [PATCH 4/5] arm/mach-bcm283x/mbox: Flush and invalidate dcache when using fw mailbox

Alexander Stein
2015-07-04T09:48:43Z

When using dcache the setup data for the mailbox must be actually written
into memory before calling into firmware. Thus flush and invalidate the
memory.

Signed-off-by: Alexander Stein <alexanders83@web.de>
---
arch/arm/mach-bcm283x/mbox.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/arm/mach-bcm283x/mbox.c b/arch/arm/mach-bcm283x/mbox.c
index 1af9be7..237c76c 100644
--- a/arch/arm/mach-bcm283x/mbox.c
+++ b/arch/arm/mach-bcm283x/mbox.c
@@ -111,6 +111,12 @@ int bcm2835_mbox_call_prop(u32 chan, struct bcm2835_mbox_hdr *buffer)
dump_buf(buffer);
#endif

+ flush_dcache_range((unsigned long)buffer,
+ (unsigned long)((void *)buffer +
+ buffer->buf_size));
+ invalidate_dcache_range((unsigned long)buffer,
+ (unsigned long)((void *)buffer +
+ buffer->buf_size));
ret = bcm2835_mbox_call_raw(chan, phys_to_bus((u32)buffer), &rbuffer);
if (ret)
return ret;
--
2.4.5