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7a7089f7e3
This was missing in commit r20072 git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20651 3c298f89-4303-0410-b956-a3cf2f4a3e73
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* Early initialization code for BCM94710 boards
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*
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* Copyright 2004, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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*
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*/
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <asm/bootinfo.h>
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void __init
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prom_init(int argc, const char **argv)
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{
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unsigned long mem;
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unsigned long max;
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mips_machgroup = MACH_GROUP_BRCM;
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mips_machtype = MACH_BCM947XX;
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/* Figure out memory size by finding aliases
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*
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* BCM47XX uses 128MB for addressing the ram, if the system contains
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* less that that amount of ram it remaps the ram more often into the
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* available space.
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* Accessing memory after 128MB will cause an exception.
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* max contains the biggest possible address supported by the platform.
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* If the method wants to try something above we assume 128MB ram.
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*/
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max = ((unsigned long)(prom_init) | ((128 << 20) - 1));
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for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) {
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if (((unsigned long)(prom_init) + mem) > max) {
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mem = (128 << 20);
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printk("assume 128MB RAM\n");
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break;
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}
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if (*(unsigned long *)((unsigned long)(prom_init) + mem) ==
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*(unsigned long *)(prom_init))
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break;
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}
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add_memory_region(0, mem, BOOT_MEM_RAM);
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}
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void __init
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prom_free_prom_memory(void)
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{
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}
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