From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> To: Olof Johansson <olof@lixom.net>, Arnd Bergmann <arnd@arndb.de>, arm@kernel.org, soc@kernel.org Cc: Artur Weber <aweber.kernel@gmail.com>, Alim Akhtar <alim.akhtar@samsung.com>, Peter Griffin <peter.griffin@linaro.org>, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski <krzk@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>, Henrik Grimler <henrik@grimler.se> Subject: [PATCH PULL v6.9 3/3] ARM: dts: samsung: exynos4412: decrease memory to account for unusable region Date: Tue, 27 Feb 2024 09:07:55 +0100 [thread overview] Message-ID: <20240227080755.34170-3-krzysztof.kozlowski@linaro.org> (raw) In-Reply-To: <20240227080755.34170-1-krzysztof.kozlowski@linaro.org> From: Artur Weber <aweber.kernel@gmail.com> The last 4 MiB of RAM on those devices is likely used by trustzone firmware, and is unusable under Linux. Change the device tree memory node accordingly. The proprietary bootloader (S-BOOT) passes these memory ranges through ATAG_MEM; this change allows us to have the correct memory ranges without relying on ATAG_MEM. Tested-by: Henrik Grimler <henrik@grimler.se> # i9300, i9305 Signed-off-by: Artur Weber <aweber.kernel@gmail.com> Link: https://lore.kernel.org/r/20240217-exynos4-memsize-fix-v1-1-7858e9c5f844@gmail.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> --- arch/arm/boot/dts/samsung/exynos4412-i9300.dts | 2 +- arch/arm/boot/dts/samsung/exynos4412-i9305.dts | 2 +- arch/arm/boot/dts/samsung/exynos4412-n710x.dts | 2 +- arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm/boot/dts/samsung/exynos4412-i9300.dts b/arch/arm/boot/dts/samsung/exynos4412-i9300.dts index 61aca5798f38..b79d456e976d 100644 --- a/arch/arm/boot/dts/samsung/exynos4412-i9300.dts +++ b/arch/arm/boot/dts/samsung/exynos4412-i9300.dts @@ -18,7 +18,7 @@ / { memory@40000000 { device_type = "memory"; - reg = <0x40000000 0x40000000>; + reg = <0x40000000 0x3fc00000>; }; }; diff --git a/arch/arm/boot/dts/samsung/exynos4412-i9305.dts b/arch/arm/boot/dts/samsung/exynos4412-i9305.dts index 77083f1a8273..1048ef5d9bc3 100644 --- a/arch/arm/boot/dts/samsung/exynos4412-i9305.dts +++ b/arch/arm/boot/dts/samsung/exynos4412-i9305.dts @@ -11,7 +11,7 @@ / { memory@40000000 { device_type = "memory"; - reg = <0x40000000 0x80000000>; + reg = <0x40000000 0x7fc00000>; }; }; diff --git a/arch/arm/boot/dts/samsung/exynos4412-n710x.dts b/arch/arm/boot/dts/samsung/exynos4412-n710x.dts index 0a151437fc73..eee1000dea92 100644 --- a/arch/arm/boot/dts/samsung/exynos4412-n710x.dts +++ b/arch/arm/boot/dts/samsung/exynos4412-n710x.dts @@ -9,7 +9,7 @@ / { memory@40000000 { device_type = "memory"; - reg = <0x40000000 0x80000000>; + reg = <0x40000000 0x7fc00000>; }; /* bootargs are passed in by bootloader */ diff --git a/arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi b/arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi index 39a3d1cbe4c3..28a605802733 100644 --- a/arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi +++ b/arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi @@ -23,7 +23,7 @@ / { memory@40000000 { device_type = "memory"; - reg = <0x40000000 0x80000000>; + reg = <0x40000000 0x7fc00000>; }; aliases { -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> To: Olof Johansson <olof@lixom.net>, Arnd Bergmann <arnd@arndb.de>, arm@kernel.org, soc@kernel.org Cc: Artur Weber <aweber.kernel@gmail.com>, Alim Akhtar <alim.akhtar@samsung.com>, Peter Griffin <peter.griffin@linaro.org>, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski <krzk@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>, Henrik Grimler <henrik@grimler.se> Subject: [PATCH PULL v6.9 3/3] ARM: dts: samsung: exynos4412: decrease memory to account for unusable region Date: Tue, 27 Feb 2024 09:07:55 +0100 [thread overview] Message-ID: <20240227080755.34170-3-krzysztof.kozlowski@linaro.org> (raw) In-Reply-To: <20240227080755.34170-1-krzysztof.kozlowski@linaro.org> From: Artur Weber <aweber.kernel@gmail.com> The last 4 MiB of RAM on those devices is likely used by trustzone firmware, and is unusable under Linux. Change the device tree memory node accordingly. The proprietary bootloader (S-BOOT) passes these memory ranges through ATAG_MEM; this change allows us to have the correct memory ranges without relying on ATAG_MEM. Tested-by: Henrik Grimler <henrik@grimler.se> # i9300, i9305 Signed-off-by: Artur Weber <aweber.kernel@gmail.com> Link: https://lore.kernel.org/r/20240217-exynos4-memsize-fix-v1-1-7858e9c5f844@gmail.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> --- arch/arm/boot/dts/samsung/exynos4412-i9300.dts | 2 +- arch/arm/boot/dts/samsung/exynos4412-i9305.dts | 2 +- arch/arm/boot/dts/samsung/exynos4412-n710x.dts | 2 +- arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm/boot/dts/samsung/exynos4412-i9300.dts b/arch/arm/boot/dts/samsung/exynos4412-i9300.dts index 61aca5798f38..b79d456e976d 100644 --- a/arch/arm/boot/dts/samsung/exynos4412-i9300.dts +++ b/arch/arm/boot/dts/samsung/exynos4412-i9300.dts @@ -18,7 +18,7 @@ / { memory@40000000 { device_type = "memory"; - reg = <0x40000000 0x40000000>; + reg = <0x40000000 0x3fc00000>; }; }; diff --git a/arch/arm/boot/dts/samsung/exynos4412-i9305.dts b/arch/arm/boot/dts/samsung/exynos4412-i9305.dts index 77083f1a8273..1048ef5d9bc3 100644 --- a/arch/arm/boot/dts/samsung/exynos4412-i9305.dts +++ b/arch/arm/boot/dts/samsung/exynos4412-i9305.dts @@ -11,7 +11,7 @@ / { memory@40000000 { device_type = "memory"; - reg = <0x40000000 0x80000000>; + reg = <0x40000000 0x7fc00000>; }; }; diff --git a/arch/arm/boot/dts/samsung/exynos4412-n710x.dts b/arch/arm/boot/dts/samsung/exynos4412-n710x.dts index 0a151437fc73..eee1000dea92 100644 --- a/arch/arm/boot/dts/samsung/exynos4412-n710x.dts +++ b/arch/arm/boot/dts/samsung/exynos4412-n710x.dts @@ -9,7 +9,7 @@ / { memory@40000000 { device_type = "memory"; - reg = <0x40000000 0x80000000>; + reg = <0x40000000 0x7fc00000>; }; /* bootargs are passed in by bootloader */ diff --git a/arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi b/arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi index 39a3d1cbe4c3..28a605802733 100644 --- a/arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi +++ b/arch/arm/boot/dts/samsung/exynos4412-p4note.dtsi @@ -23,7 +23,7 @@ / { memory@40000000 { device_type = "memory"; - reg = <0x40000000 0x80000000>; + reg = <0x40000000 0x7fc00000>; }; aliases { -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2024-02-27 8:08 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-02-27 8:07 [GIT PULL 1/3] samsung: drivers for v6.9, part two Krzysztof Kozlowski 2024-02-27 8:07 ` Krzysztof Kozlowski 2024-02-27 8:07 ` [PATCH PULL v6.9 2/3] ARM: defconfig: enable STMicroelectronics accelerometer and gyro for Exynos Krzysztof Kozlowski 2024-02-27 8:07 ` Krzysztof Kozlowski 2024-02-27 8:07 ` Krzysztof Kozlowski [this message] 2024-02-27 8:07 ` [PATCH PULL v6.9 3/3] ARM: dts: samsung: exynos4412: decrease memory to account for unusable region Krzysztof Kozlowski 2024-03-04 16:12 ` [GIT PULL 1/3] samsung: drivers for v6.9, part two patchwork-bot+linux-soc 2024-03-04 17:40 ` patchwork-bot+linux-soc
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