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e1b77baed6
The existing code is buggy because built-in DTBs are in init memory. It is also broken because the reserved bootmem was then freed after unflattening, but the unflattened tree points to data in the flat tree. Fix this by using the unflatten_and_copy_device_tree function. This removes all accesses to FDT header data by the arch code. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Tested-by: Grant Likely <grant.likely@linaro.org>
105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/*
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* Copyright 2003-2013 Broadcom Corporation.
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* All Rights Reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the Broadcom
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/kernel.h>
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#include <linux/bootmem.h>
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#include <linux/of_fdt.h>
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#include <linux/of_platform.h>
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#include <linux/of_device.h>
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#include <asm/prom.h>
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extern u32 __dtb_xlp_evp_begin[], __dtb_xlp_svp_begin[],
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__dtb_xlp_fvp_begin[], __dtb_xlp_gvp_begin[], __dtb_start[];
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static void *xlp_fdt_blob;
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void __init *xlp_dt_init(void *fdtp)
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{
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if (!fdtp) {
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switch (current_cpu_data.processor_id & 0xff00) {
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#ifdef CONFIG_DT_XLP_GVP
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case PRID_IMP_NETLOGIC_XLP9XX:
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fdtp = __dtb_xlp_gvp_begin;
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break;
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#endif
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#ifdef CONFIG_DT_XLP_FVP
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case PRID_IMP_NETLOGIC_XLP2XX:
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fdtp = __dtb_xlp_fvp_begin;
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break;
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#endif
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#ifdef CONFIG_DT_XLP_SVP
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case PRID_IMP_NETLOGIC_XLP3XX:
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fdtp = __dtb_xlp_svp_begin;
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break;
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#endif
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#ifdef CONFIG_DT_XLP_EVP
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case PRID_IMP_NETLOGIC_XLP8XX:
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fdtp = __dtb_xlp_evp_begin;
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break;
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#endif
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default:
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/* Pick a built-in if any, and hope for the best */
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fdtp = __dtb_start;
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break;
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}
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}
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xlp_fdt_blob = fdtp;
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return fdtp;
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}
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void __init xlp_early_init_devtree(void)
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{
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__dt_setup_arch(xlp_fdt_blob);
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strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
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}
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void __init device_tree_init(void)
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{
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unflatten_and_copy_device_tree();
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}
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static struct of_device_id __initdata xlp_ids[] = {
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{ .compatible = "simple-bus", },
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{},
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};
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int __init xlp8xx_ds_publish_devices(void)
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{
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if (!of_have_populated_dt())
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return 0;
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return of_platform_bus_probe(NULL, xlp_ids, NULL);
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}
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device_initcall(xlp8xx_ds_publish_devices);
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