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From: Krzysztof Kozlowski <krzk@kernel.org>
To: Jonathan Corbet <corbet@lwn.net>, Kukjin Kim <kgene@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH 3/3] ARM: s3c: Bring back notes from removed debug-macro.S
Date: Fri, 11 Sep 2020 16:33:43 +0200	[thread overview]
Message-ID: <20200911143343.498-3-krzk@kernel.org> (raw)
In-Reply-To: <20200911143343.498-1-krzk@kernel.org>

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(-)

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 = {
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzk@kernel.org>
To: Jonathan Corbet <corbet@lwn.net>, Kukjin Kim <kgene@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH 3/3] ARM: s3c: Bring back notes from removed debug-macro.S
Date: Fri, 11 Sep 2020 16:33:43 +0200	[thread overview]
Message-ID: <20200911143343.498-3-krzk@kernel.org> (raw)
In-Reply-To: <20200911143343.498-1-krzk@kernel.org>

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(-)

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 = {
-- 
2.17.1


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  parent reply	other threads:[~2020-09-11 15:26 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-11 14:33 [PATCH 1/3] Documentation: Update paths of Samsung S3C machine files Krzysztof Kozlowski
2020-09-11 14:33 ` Krzysztof Kozlowski
2020-09-11 14:33 ` [PATCH 2/3] serial: s3c: Update path of Samsung S3C machine file Krzysztof Kozlowski
2020-09-11 14:33   ` Krzysztof Kozlowski
2020-09-11 14:33 ` Krzysztof Kozlowski [this message]
2020-09-11 14:33   ` [PATCH 3/3] ARM: s3c: Bring back notes from removed debug-macro.S Krzysztof Kozlowski
2020-09-16 17:48   ` Krzysztof Kozlowski
2020-09-16 17:48     ` Krzysztof Kozlowski

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