57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
|
|
* Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
|
|
*/
|
|
#include <linux/memblock.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/pfn.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/string.h>
|
|
#include <linux/swap.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/page.h>
|
|
#include <asm/sections.h>
|
|
|
|
#include <asm/mach-ar7/ar7.h>
|
|
|
|
static int __init memsize(void)
|
|
{
|
|
u32 size = (64 << 20);
|
|
u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
|
|
u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
|
|
u32 *tmpaddr = addr;
|
|
|
|
while (tmpaddr > kernel_end) {
|
|
*tmpaddr = (u32)tmpaddr;
|
|
size >>= 1;
|
|
tmpaddr -= size >> 2;
|
|
}
|
|
|
|
do {
|
|
tmpaddr += size >> 2;
|
|
if (*tmpaddr != (u32)tmpaddr)
|
|
break;
|
|
size <<= 1;
|
|
} while (size < (64 << 20));
|
|
|
|
writel((u32)tmpaddr, &addr);
|
|
|
|
return size;
|
|
}
|
|
|
|
void __init prom_meminit(void)
|
|
{
|
|
unsigned long pages;
|
|
|
|
pages = memsize() >> PAGE_SHIFT;
|
|
add_memory_region(PHYS_OFFSET, pages << PAGE_SHIFT, BOOT_MEM_RAM);
|
|
}
|
|
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
/* Nothing to free */
|
|
}
|