mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 01:26:29 +07:00
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
/*
|
|
* Bootwrapper for ePAPR compliant firmwares
|
|
*
|
|
* Copyright 2010 David Gibson <david@gibson.dropbear.id.au>, IBM Corporation.
|
|
*
|
|
* Based on earlier bootwrappers by:
|
|
* (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\
|
|
* and
|
|
* Scott Wood <scottwood@freescale.com>
|
|
* Copyright (c) 2007 Freescale Semiconductor, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*/
|
|
|
|
#include "ops.h"
|
|
#include "stdio.h"
|
|
#include "io.h"
|
|
#include <libfdt.h>
|
|
|
|
BSS_STACK(4096);
|
|
|
|
#define EPAPR_SMAGIC 0x65504150
|
|
#define EPAPR_EMAGIC 0x45504150
|
|
|
|
static unsigned epapr_magic;
|
|
static unsigned long ima_size;
|
|
static unsigned long fdt_addr;
|
|
|
|
static void platform_fixups(void)
|
|
{
|
|
if ((epapr_magic != EPAPR_EMAGIC)
|
|
&& (epapr_magic != EPAPR_SMAGIC))
|
|
fatal("r6 contained 0x%08x instead of ePAPR magic number\n",
|
|
epapr_magic);
|
|
|
|
if (ima_size < (unsigned long)_end)
|
|
printf("WARNING: Image loaded outside IMA!"
|
|
" (_end=%p, ima_size=0x%lx)\n", _end, ima_size);
|
|
if (ima_size < fdt_addr)
|
|
printf("WARNING: Device tree address is outside IMA!"
|
|
"(fdt_addr=0x%lx, ima_size=0x%lx)\n", fdt_addr,
|
|
ima_size);
|
|
if (ima_size < fdt_addr + fdt_totalsize((void *)fdt_addr))
|
|
printf("WARNING: Device tree extends outside IMA!"
|
|
" (fdt_addr=0x%lx, size=0x%x, ima_size=0x%lx\n",
|
|
fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size);
|
|
}
|
|
|
|
void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
|
|
unsigned long r6, unsigned long r7)
|
|
{
|
|
epapr_magic = r6;
|
|
ima_size = r7;
|
|
fdt_addr = r3;
|
|
|
|
/* FIXME: we should process reserve entries */
|
|
|
|
simple_alloc_init(_end, ima_size - (unsigned long)_end, 32, 64);
|
|
|
|
fdt_init((void *)fdt_addr);
|
|
|
|
serial_console_init();
|
|
platform_ops.fixups = platform_fixups;
|
|
}
|