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[PATCH V2 4/5] ARM: BCM5301X: Specify all RAM by including an extra block

From Rafał Miłecki <zajec5@gmail.com>
Newsgroups linux.kernel
Subject [PATCH V2 4/5] ARM: BCM5301X: Specify all RAM by including an extra block
Date 2016-12-07 09:00 +0100
Message-ID <sLFiV-5Ca-11@gated-at.bofh.it> (permalink)
References <sLFiV-5Ca-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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From: Rafał Miłecki <rafal@milecki.pl>

The first 128 MiB of RAM can be accessed using an alias at address 0x0.

In theory we could access whole RAM using 0x80000000 - 0xbfffffff range
(up to 1 GiB) but it doesn't seem to work on Northstar. For some reason
(hardware setup left by the bootloader maybe?) 0x80000000 - 0x87ffffff
range can't be used. I reproduced this problem on:
1) Buffalo WZR-600DHP2 (BCM47081)
2) Netgear R6250 (BCM4708)
3) D-Link DIR-885L (BCM47094)

So it seems we're forced to access first 128 MiB using alias at 0x0 and
the rest using real base address + 128 MiB offset which is 0x88000000.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
V2: Updated commit message, thanks Jon!
    Included XWR-3100
---
 arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dts        | 3 ++-
 arch/arm/boot/dts/bcm4708-asus-rt-ac68u.dts        | 3 ++-
 arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dts  | 3 ++-
 arch/arm/boot/dts/bcm4708-netgear-r6250.dts        | 3 ++-
 arch/arm/boot/dts/bcm4708-netgear-r6300-v2.dts     | 3 ++-
 arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts      | 3 ++-
 arch/arm/boot/dts/bcm47081-asus-rt-n18u.dts        | 3 ++-
 arch/arm/boot/dts/bcm47081-buffalo-wzr-600dhp2.dts | 3 ++-
 arch/arm/boot/dts/bcm47081-buffalo-wzr-900dhp.dts  | 3 ++-
 arch/arm/boot/dts/bcm4709-asus-rt-ac87u.dts        | 3 ++-
 arch/arm/boot/dts/bcm4709-buffalo-wxr-1900dhp.dts  | 3 ++-
 arch/arm/boot/dts/bcm4709-netgear-r7000.dts        | 3 ++-
 arch/arm/boot/dts/bcm4709-netgear-r8000.dts        | 3 ++-
 arch/arm/boot/dts/bcm47094-dlink-dir-885l.dts      | 3 ++-
 arch/arm/boot/dts/bcm47094-luxul-xwr-3100.dts      | 3 ++-
 arch/arm/boot/dts/bcm47094-netgear-r8500.dts       | 3 ++-
 16 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dts b/arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dts
index 112a5a8..d241cee 100644
--- a/arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dts
+++ b/arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm4708-asus-rt-ac68u.dts b/arch/arm/boot/dts/bcm4708-asus-rt-ac68u.dts
index 3600f56..b0e6204 100644
--- a/arch/arm/boot/dts/bcm4708-asus-rt-ac68u.dts
+++ b/arch/arm/boot/dts/bcm4708-asus-rt-ac68u.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dts b/arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dts
index d49afec0..c9ba6b9 100644
--- a/arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dts
+++ b/arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x18000000>;
 	};
 
 	spi {
diff --git a/arch/arm/boot/dts/bcm4708-netgear-r6250.dts b/arch/arm/boot/dts/bcm4708-netgear-r6250.dts
index 8519548..b9f66c0 100644
--- a/arch/arm/boot/dts/bcm4708-netgear-r6250.dts
+++ b/arch/arm/boot/dts/bcm4708-netgear-r6250.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm4708-netgear-r6300-v2.dts b/arch/arm/boot/dts/bcm4708-netgear-r6300-v2.dts
index 6229ef2..ae0199f 100644
--- a/arch/arm/boot/dts/bcm4708-netgear-r6300-v2.dts
+++ b/arch/arm/boot/dts/bcm4708-netgear-r6300-v2.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts b/arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts
index 74cfcd3..36b628b1 100644
--- a/arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts
+++ b/arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm47081-asus-rt-n18u.dts b/arch/arm/boot/dts/bcm47081-asus-rt-n18u.dts
index 71b98cf..db8608b 100644
--- a/arch/arm/boot/dts/bcm47081-asus-rt-n18u.dts
+++ b/arch/arm/boot/dts/bcm47081-asus-rt-n18u.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm47081-buffalo-wzr-600dhp2.dts b/arch/arm/boot/dts/bcm47081-buffalo-wzr-600dhp2.dts
index 2922536..d51586d 100644
--- a/arch/arm/boot/dts/bcm47081-buffalo-wzr-600dhp2.dts
+++ b/arch/arm/boot/dts/bcm47081-buffalo-wzr-600dhp2.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	spi {
diff --git a/arch/arm/boot/dts/bcm47081-buffalo-wzr-900dhp.dts b/arch/arm/boot/dts/bcm47081-buffalo-wzr-900dhp.dts
index 184fd92..de041b8 100644
--- a/arch/arm/boot/dts/bcm47081-buffalo-wzr-900dhp.dts
+++ b/arch/arm/boot/dts/bcm47081-buffalo-wzr-900dhp.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	gpio-keys {
diff --git a/arch/arm/boot/dts/bcm4709-asus-rt-ac87u.dts b/arch/arm/boot/dts/bcm4709-asus-rt-ac87u.dts
index eac0f52..eaca687 100644
--- a/arch/arm/boot/dts/bcm4709-asus-rt-ac87u.dts
+++ b/arch/arm/boot/dts/bcm4709-asus-rt-ac87u.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm4709-buffalo-wxr-1900dhp.dts b/arch/arm/boot/dts/bcm4709-buffalo-wxr-1900dhp.dts
index aab39c9..b32957c 100644
--- a/arch/arm/boot/dts/bcm4709-buffalo-wxr-1900dhp.dts
+++ b/arch/arm/boot/dts/bcm4709-buffalo-wxr-1900dhp.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x18000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm4709-netgear-r7000.dts b/arch/arm/boot/dts/bcm4709-netgear-r7000.dts
index 7ab1176..f459a98 100644
--- a/arch/arm/boot/dts/bcm4709-netgear-r7000.dts
+++ b/arch/arm/boot/dts/bcm4709-netgear-r7000.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm4709-netgear-r8000.dts b/arch/arm/boot/dts/bcm4709-netgear-r8000.dts
index 56d38a3..cd13534 100644
--- a/arch/arm/boot/dts/bcm4709-netgear-r8000.dts
+++ b/arch/arm/boot/dts/bcm4709-netgear-r8000.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm47094-dlink-dir-885l.dts b/arch/arm/boot/dts/bcm47094-dlink-dir-885l.dts
index 7fb9270..64ded76 100644
--- a/arch/arm/boot/dts/bcm47094-dlink-dir-885l.dts
+++ b/arch/arm/boot/dts/bcm47094-dlink-dir-885l.dts
@@ -21,7 +21,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	nand: nand@18028000 {
diff --git a/arch/arm/boot/dts/bcm47094-luxul-xwr-3100.dts b/arch/arm/boot/dts/bcm47094-luxul-xwr-3100.dts
index 93cc91d..5cf4ab1 100644
--- a/arch/arm/boot/dts/bcm47094-luxul-xwr-3100.dts
+++ b/arch/arm/boot/dts/bcm47094-luxul-xwr-3100.dts
@@ -18,7 +18,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x08000000>;
 	};
 
 	leds {
diff --git a/arch/arm/boot/dts/bcm47094-netgear-r8500.dts b/arch/arm/boot/dts/bcm47094-netgear-r8500.dts
index 7ecd57c..600795e 100644
--- a/arch/arm/boot/dts/bcm47094-netgear-r8500.dts
+++ b/arch/arm/boot/dts/bcm47094-netgear-r8500.dts
@@ -18,7 +18,8 @@
 	};
 
 	memory {
-		reg = <0x00000000 0x08000000>;
+		reg = <0x00000000 0x08000000
+		       0x88000000 0x18000000>;
 	};
 
 	leds {
-- 
2.10.1

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[PATCH V2 1/5] ARM: BCM5301X: Fix LAN LED labels for Luxul XWR-3100 Rafał Miłecki <zajec5@gmail.com> - 2016-12-07 09:00 +0100
  [PATCH V2 2/5] ARM: BCM5301X: Specify USB controllers in DT Rafał Miłecki <zajec5@gmail.com> - 2016-12-07 09:00 +0100
    Re: [PATCH V2 2/5] ARM: BCM5301X: Specify USB controllers in DT Ray Jui <ray.jui@broadcom.com> - 2016-12-07 18:20 +0100
  [PATCH V2 4/5] ARM: BCM5301X: Specify all RAM by including an extra block Rafał Miłecki <zajec5@gmail.com> - 2016-12-07 09:00 +0100
    Re: [PATCH V2 4/5] ARM: BCM5301X: Specify all RAM by including an  extra block Jon Mason <jon.mason@broadcom.com> - 2016-12-07 21:00 +0100
  [PATCH V2 3/5] ARM: BCM5301X: Set GPIO enabling USB power on Netgear R7000 Rafał Miłecki <zajec5@gmail.com> - 2016-12-07 09:00 +0100

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