diff mbox series

[3/3] ARM: s3c: Bring back notes from removed debug-macro.S

Message ID 20200911143343.498-3-krzk@kernel.org
State Accepted
Headers show
Series [1/3] Documentation: Update paths of Samsung S3C machine files | expand

Commit Message

Krzysztof Kozlowski Sept. 11, 2020, 2:33 p.m. UTC
Documentation references notes from a removed debug-macro.S file so
bring the contents here.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 arch/arm/mach-s3c/s3c64xx.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Comments

Krzysztof Kozlowski Sept. 16, 2020, 5:48 p.m. UTC | #1
On Fri, Sep 11, 2020 at 04:33:43PM +0200, Krzysztof Kozlowski wrote:
> Documentation references notes from a removed debug-macro.S file so
> bring the contents here.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
> ---
>  arch/arm/mach-s3c/s3c64xx.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)

Applied.

Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/arch/arm/mach-s3c/s3c64xx.c b/arch/arm/mach-s3c/s3c64xx.c
index b5fc615a482f..4dfb648142f2 100644
--- a/arch/arm/mach-s3c/s3c64xx.c
+++ b/arch/arm/mach-s3c/s3c64xx.c
@@ -95,7 +95,12 @@  static struct cpu_table cpu_ids[] __initdata = {
 
 /* minimal IO mapping */
 
-/* see notes on uart map in arch/arm/mach-s3c64xx/include/mach/debug-macro.S */
+/*
+ * note, for the boot process to work we have to keep the UART
+ * virtual address aligned to an 1MiB boundary for the L1
+ * mapping the head code makes. We keep the UART virtual address
+ * aligned and add in the offset when we load the value here.
+ */
 #define UART_OFFS (S3C_PA_UART & 0xfffff)
 
 static struct map_desc s3c_iodesc[] __initdata = {