0c9fa29149
This makes the "OF" zImage wrapper (zImage.pseries, zImage.pmac, zImage.maple) work if booted via a flat device-tree (ePAPR boot mode), and thus potentially usable with kexec. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/*
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* Bootwrapper for ePAPR compliant firmwares
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*
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* Copyright 2010 David Gibson <david@gibson.dropbear.id.au>, IBM Corporation.
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*
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* Based on earlier bootwrappers by:
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* (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\
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* and
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* Scott Wood <scottwood@freescale.com>
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* Copyright (c) 2007 Freescale Semiconductor, Inc.
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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 version 2 as published
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* by the Free Software Foundation.
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*/
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#include "ops.h"
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#include "stdio.h"
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#include "io.h"
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#include <libfdt.h>
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BSS_STACK(4096);
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#define EPAPR_SMAGIC 0x65504150
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#define EPAPR_EMAGIC 0x45504150
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static unsigned epapr_magic;
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static unsigned long ima_size;
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static unsigned long fdt_addr;
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static void platform_fixups(void)
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{
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if ((epapr_magic != EPAPR_EMAGIC)
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&& (epapr_magic != EPAPR_SMAGIC))
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fatal("r6 contained 0x%08x instead of ePAPR magic number\n",
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epapr_magic);
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if (ima_size < (unsigned long)_end)
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printf("WARNING: Image loaded outside IMA!"
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" (_end=%p, ima_size=0x%lx)\n", _end, ima_size);
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if (ima_size < fdt_addr)
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printf("WARNING: Device tree address is outside IMA!"
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"(fdt_addr=0x%lx, ima_size=0x%lx)\n", fdt_addr,
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ima_size);
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if (ima_size < fdt_addr + fdt_totalsize((void *)fdt_addr))
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printf("WARNING: Device tree extends outside IMA!"
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" (fdt_addr=0x%lx, size=0x%x, ima_size=0x%lx\n",
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fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size);
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}
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void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7)
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{
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epapr_magic = r6;
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ima_size = r7;
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fdt_addr = r3;
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/* FIXME: we should process reserve entries */
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simple_alloc_init(_end, ima_size - (unsigned long)_end, 32, 64);
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fdt_init((void *)fdt_addr);
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serial_console_init();
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platform_ops.fixups = platform_fixups;
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}
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