// SPDX-License-Identifier: GPL-2.0-or-later
/*
 */
#include <linux/fs.h>
#include <linux/fcntl.h>
#include <linux/memblock.h>
#include <linux/mm.h>

#include <asm/bootinfo.h>

#include <loongson.h>
#include <mem.h>
#include <pci.h>


u32 memsize, highmemsize;

void __init prom_init_memory(void)
{
        memblock_add(0x0, (memsize << 20));

#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
        {
                int bit;

                bit = fls(memsize + highmemsize);
                if (bit != ffs(memsize + highmemsize))
                        bit += 20;
                else
                        bit = bit + 20 - 1;

                /* set cpu window3 to map CPU to DDR: 2G -> 2G */
                LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul,
                                          0x80000000ul, (1 << bit));
                mmiowb();
        }
#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */

#ifdef CONFIG_64BIT
        if (highmemsize > 0)
                memblock_add(LOONGSON_HIGHMEM_START, highmemsize << 20);
#endif /* !CONFIG_64BIT */
}