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| author | Sven Eckelmann <sven.eckelmann@openmesh.com> | 2018-04-17 14:31:53 +0200 |
|---|---|---|
| committer | Mathias Kresin <dev@kresin.me> | 2018-04-20 20:58:52 +0200 |
| commit | 0d6243283415683dc792ea34fcba885454908836 (patch) | |
| tree | 79b6e3354a7ee03323573c80b5d3e01ab2c3ecc3 /target/linux/ipq40xx/patches-4.14 | |
| parent | 74a0d8cd92c7e753c6a342a7b90151ec042a03c5 (diff) | |
| download | upstream-0d6243283415683dc792ea34fcba885454908836.tar.gz upstream-0d6243283415683dc792ea34fcba885454908836.tar.bz2 upstream-0d6243283415683dc792ea34fcba885454908836.zip | |
ipq40xx: Remove unused reserved-memory nodes
The reserved-memory regions are mostly undocumented by QCA and are named
very unspecific in the QSDK device trees. It was tried to clean them up by
commit 71ed9f10a33e ("ipq40xx: Use detailed reserved memory for A42") and
similar changes.
The features which require these regions were mostly unknown but
Senthilkumar N L <snlakshm@qti.qualcomm.com> and Sricharan Ramabadhran
<srichara@qti.qualcomm.com> provided some more insight in some of them:
* crash dump feature
- a couple of regions used when 'qca,scm_restart_reason' dt node has the
value 'dload_status' not set to 1
+ apps_bl <0x87000000 0x400000>
+ sbl <0x87400000 0x100000>
+ cnss_debug <0x87400000 0x100000>
+ cpu_context_dump <0x87b00000 0x080000>
- required driver not available in Linux
- safe to remove
* QSEE app execution
- region tz_apps <0x87b80000 0x280000>
- required driver not available in Linux
- safe to remove
* communication with TZ/QSEE
- region smem <0x87b80000 0x280000>
- driver changes not yet upstreamed
- must not be removed because any access can crash kernel/program
* trustzone (QSEE) private memory
- region tz <0x87e80000 0x180000>
- must not be removed because any access can crash kernel/program
Removing the unnecessary regions saves some kilobyte of reserved-memory and
cleans up the device tree:
* 2560 KiB
- 8devices Jalapeno
- AVM FRITZ!Box 4040
- Compex WPJ428
- Meraki MR33 Access Point
- OpenMesh A42
* 14336 KiB
- GL.iNet GL-B1300
- Qualcomm Technologies, Inc. IPQ40xx/AP-DK01.1-C1
Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Diffstat (limited to 'target/linux/ipq40xx/patches-4.14')
| -rw-r--r-- | target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch | 27 |
1 files changed, 1 insertions, 26 deletions
diff --git a/target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch b/target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch index e9d262069f..3043d63f3e 100644 --- a/target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch +++ b/target/linux/ipq40xx/patches-4.14/864-07-dts-ipq4019-ap-dk01.1-c1-add-spi-and-ram-nodes.patch @@ -1,6 +1,6 @@ --- a/arch/arm/boot/dts/qcom-ipq4019-ap.dk01.1-c1.dts +++ b/arch/arm/boot/dts/qcom-ipq4019-ap.dk01.1-c1.dts -@@ -19,4 +19,112 @@ +@@ -19,4 +19,87 @@ / { model = "Qualcomm Technologies, Inc. IPQ40xx/AP-DK01.1-C1"; @@ -14,31 +14,6 @@ + #size-cells = <0x1>; + ranges; + -+ apps_bl@87000000 { -+ reg = <0x87000000 0x400000>; -+ no-map; -+ }; -+ -+ sbl@87400000 { -+ reg = <0x87400000 0x100000>; -+ no-map; -+ }; -+ -+ cnss_debug@87500000 { -+ reg = <0x87500000 0x600000>; -+ no-map; -+ }; -+ -+ cpu_context_dump@87b00000 { -+ reg = <0x87b00000 0x080000>; -+ no-map; -+ }; -+ -+ tz_apps@87b80000 { -+ reg = <0x87b80000 0x280000>; -+ no-map; -+ }; -+ + smem@87e00000 { + reg = <0x87e00000 0x080000>; + no-map; |