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/*
* Early initialization code for BCM94710 boards
*
* Copyright 2006, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
*
* $Id$
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <asm/bootinfo.h>
void __init prom_init(int argc, char **argv, char **envp, int *prom_vec)
{
unsigned long mem, before, offset;
mips_machgroup = MACH_GROUP_BRCM;
mips_machtype = MACH_BCM947XX;
/* Figure out memory size by finding aliases.
*
* We assume that there will be no more than 128 MB of memory,
* and that the memory size will be a multiple of 1 MB.
*
* We set 'before' to be the amount of memory (in MB) before this
* function, i.e. one MB less than the number of MB of memory that we
* *know* we have. And we set 'offset' to be the address of 'prominit'
* minus 'before', so that KSEG0 or KSEG1 base + offset < 1 MB.
* This prevents us from overrunning 128 MB and causing a bus error.
*/
before = ((unsigned long) &prom_init) & (127 << 20);
offset = ((unsigned long) &prom_init) - before;
for (mem = before + (1 << 20); mem < (128 << 20); mem += (1 << 20))
if (*(unsigned long *)(offset + mem) ==
*(unsigned long *)(prom_init)) {
/*
* We may already be well past the end of memory at
* this point, so we'll have to compensate for it.
*/
mem -= before;
break;
}
add_memory_region(0, mem, BOOT_MEM_RAM);
}
void __init prom_free_prom_memory(void)
{
}
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