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The missing NULL terminator can cause a panic on
PPC405 boards during boot:
Linux/PowerPC load: console=ttyS0,115200 root=/dev/mtdblock1 rootfstype=squashfs,jffs2 noinitrd init=/etc/preinit
Finalizing device tree... flat tree at 0x6a5160
bootconsole [udbg0] enabled
Page fault in user mode with in_atomic() = 1 mm = (null)
NIP = c0275f50 MSR = fffffffe
Oops: Weird page fault, sig: 11 [#1]
PowerPC 40x Platform
Modules linked in:
NIP: c0275f50 LR: c0275f60 CTR: c0280000
REGS: c0275eb0 TRAP: 636f7265 Not tainted (3.7.1)
MSR: fffffffe <VEC,VSX,EE,PR,FP,ME,SE,BE,IR,DR,PMM,RI> CR: c06a6190 XER: 00000001
TASK = c02662a8[0] 'swapper' THREAD: c0274000
GPR00: c0275ec0 c000c658 c027c4bf 00000000 c0275ee0 c000a0ec c020a1a8 c020a1f0
GPR08: c020f631 c020f404 c025f078 c025f080 c0275f10
Call Trace:
---[ end trace 31fd0ba7d8756001 ]---
Kernel panic - not syncing: Attempted to kill the idle task!
The panic happens since commit 9597abe00c1bab2aedce6b49866bf6d1e81c9eed
(sections: fix section conflicts in arch/powerpc), however the root
cause of this is that the NULL terminator were not added in commit
a4f740cf33f7f6c164bbde3c0cdbcc77b0c4997c (of/flattree: Add of_flat_dt_match()
helper function).
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: <stable@vger.kernel.org>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Conflicts:
arch/powerpc/platforms/40x/ppc40x_simple.c
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So I've had one of these for a while and it looks like the vendor never
bothered submitting the support upstream.
This adds it using ppc40x_simple and provides a device-tree.
There are some changes to the boot wrapper because the way u-boot works
on this thing, it seems to expect a multipart image with the kernel,
initrd and dtb in it.
The USB support is missing as it needs the yet unmerged driver for
the DWC OTG part and the GPIOs may need further definition in the dts.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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The AppliedMicro APM8018X embedded processor targets embedded applications that
require low power and a small footprint. It features a PowerPC 405 processor
core built in a 65nm low-power CMOS process with a five-stage pipeline executing
up to one instruction per cycle. The family has 128-kbytes of on-chip memory,
a 128-bit local bus and on-chip DDR2 SDRAM controller with 16-bit interface.
Signed-off-by: Tanmay Inamdar <tinamdar@apm.com>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
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This renames pci flags functions and enums in preparation for creating
generic version in asm-generic/pci-bridge.h. The following search and
replace is done:
s/ppc_pci_/pci_/
s/PPC_PCI_/PCI_/
Direct accesses to ppc_pci_flag variable are replaced with helper
functions.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
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This patch adds of_flat_dt_match() which tests a node for
compatibility with a list of values and converts the relevant powerpc
platform code to use it. This approach simplifies the board support
code a bit.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
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This patch adds support for the ESTeem 195E Hotfoot SBC.
There are several variants of the SBC deployed, single/dual
ethernet+serial, and also 4MB/8MB flash variations. In the interest of
having a single kernel image boot on all boards, the cuboot shim detects
the differences and mangles the DTS tree appropriately.
With the exception of the CF interface that was never populated on
production boards, this code/DTS supports all boardpop options.
Signed-off-by: Solomon Peachy <solomon@linux-wlan.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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This cleans up the kilauea/halekala board ports to use the ppc40x_simple
platform support.
Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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This cleans up the makalu board port to use the ppc40x_simple platform
support.
Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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Currently there are a number of platforms that open code access to
the ppc_pci_flags global variable. However, that variable is not
present if CONFIG_PCI is not set, which can lead to a build break.
This introduces a number of accessor functions that are defined
to be empty in the case of CONFIG_PCI being disabled. The
various platform files in the kernel are updated to use these.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This adds a common board file for almost all of the "simple" PowerPC 40x
boards that exist today. This is intended to be a single place to add
support for boards that do not differ in platform support from most of the
evaluation boards that are used as reference platforms. Boards that have
specific requirements or custom hardware setup should still have their own
board.c file.
The first board ported to this is the AMCC PowerPC 405EZ Acadia board.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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