2008-09-03 18:58:22 -06:00
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/*
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* Generic PowerPC 40x platform support
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*
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* Copyright 2008 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; version 2 of the License.
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*
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* This implements simple platform support for PowerPC 44x chips. This is
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* mostly used for eval boards or other simple and "generic" 44x boards. If
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* your board has custom functions or hardware, then you will likely want to
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* implement your own board.c file to accommodate it.
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*/
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#include <asm/machdep.h>
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#include <asm/pci-bridge.h>
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#include <asm/ppc4xx.h>
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#include <asm/prom.h>
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#include <asm/time.h>
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#include <asm/udbg.h>
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#include <asm/uic.h>
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#include <linux/init.h>
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#include <linux/of_platform.h>
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2014-09-10 13:56:38 -06:00
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static const struct of_device_id ppc40x_of_bus[] __initconst = {
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2008-09-03 18:58:22 -06:00
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{ .compatible = "ibm,plb3", },
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{ .compatible = "ibm,plb4", },
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{ .compatible = "ibm,opb", },
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{ .compatible = "ibm,ebc", },
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{ .compatible = "simple-bus", },
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{},
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};
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static int __init ppc40x_device_probe(void)
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{
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of_platform_bus_probe(NULL, ppc40x_of_bus, NULL);
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return 0;
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}
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machine_device_initcall(ppc40x_simple, ppc40x_device_probe);
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/* This is the list of boards that can be supported by this simple
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* platform code. This does _not_ mean the boards are compatible,
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* as they most certainly are not from a device tree perspective.
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* However, their differences are handled by the device tree and the
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* drivers and therefore they don't need custom board support files.
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*
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* Again, if your board needs to do things differently then create a
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* board.c file for it rather than adding it to this list.
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*/
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2012-10-04 18:11:37 -06:00
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static const char * const board[] __initconst = {
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2009-06-02 23:24:12 -06:00
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"amcc,acadia",
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2009-06-02 23:28:03 -06:00
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"amcc,haleakala",
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"amcc,kilauea",
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2009-08-20 04:19:47 -06:00
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"amcc,makalu",
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2011-11-28 14:01:41 -07:00
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"apm,klondike",
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2011-12-01 12:35:08 -07:00
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"est,hotfoot",
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powerpc: Add missing NULL terminator to avoid boot panic on PPC40x
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>
2012-12-19 20:44:28 -07:00
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"plathome,obs600",
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NULL
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2008-09-03 18:58:22 -06:00
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};
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static int __init ppc40x_probe(void)
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{
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2016-07-04 23:04:05 -06:00
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if (of_device_compatible_match(of_root, board)) {
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2011-07-12 08:25:51 -06:00
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pci_set_flags(PCI_REASSIGN_ALL_RSRC);
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2010-10-30 09:49:09 -06:00
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return 1;
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2008-09-03 18:58:22 -06:00
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}
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return 0;
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}
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define_machine(ppc40x_simple) {
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.name = "PowerPC 40x Platform",
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.probe = ppc40x_probe,
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.progress = udbg_progress,
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.init_IRQ = uic_init_tree,
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.get_irq = uic_get_irq,
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.restart = ppc4xx_reset_system,
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.calibrate_decr = generic_calibrate_decr,
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};
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