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kernel add
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/*
* Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
*
* Based on earlier code:
* Copyright (C) Paul Mackerras 1997.
*
* Matt Porter <mporter@kernel.crashing.org>
* Copyright 2002-2005 MontaVista Software Inc.
*
* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
* Copyright (c) 2003, 2004 Zultys Technologies
*
* Copyright 2007 David Gibson, IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <stdarg.h>
#include <stddef.h>
#include "types.h"
#include "elf.h"
#include "string.h"
#include "stdio.h"
#include "page.h"
#include "ops.h"
#include "reg.h"
#include "io.h"
#include "dcr.h"
#include "4xx.h"
#include "44x.h"
#include "libfdt.h"
BSS_STACK(4096);
static u32 ibm4xx_memstart;
static void iss_4xx_fixups(void)
{
void *memory;
u32 reg[3];
memory = finddevice("/memory");
if (!memory)
fatal("Can't find memory node
");
/* This assumes #address-cells = 2, #size-cells =1 and that */
getprop(memory, "reg", reg, sizeof(reg));
if (reg[2])
/* If the device tree specifies the memory range, use it */
ibm4xx_memstart = reg[1];
else
/* othersize, read it from the SDRAM controller */
ibm4xx_sdram_fixup_memsize();
}
static void *iss_4xx_vmlinux_alloc(unsigned long size)
{
return (void *)ibm4xx_memstart;
}
#define SPRN_PIR 0x11E /* Processor Indentification Register */
void platform_init(void)
{
unsigned long end_of_ram = 0x08000000;
unsigned long avail_ram = end_of_ram - (unsigned long)_end;
u32 pir_reg;
simple_alloc_init(_end, avail_ram, 128, 64);
platform_ops.fixups = iss_4xx_fixups;
platform_ops.vmlinux_alloc = iss_4xx_vmlinux_alloc;
platform_ops.exit = ibm44x_dbcr_reset;
pir_reg = mfspr(SPRN_PIR);
fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
fdt_init(_dtb_start);
serial_console_init();
}
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