162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci */ 462306a36Sopenharmony_ci#include <linux/fs.h> 562306a36Sopenharmony_ci#include <linux/fcntl.h> 662306a36Sopenharmony_ci#include <linux/memblock.h> 762306a36Sopenharmony_ci#include <linux/mm.h> 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci#include <asm/bootinfo.h> 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ci#include <loongson.h> 1262306a36Sopenharmony_ci#include <mem.h> 1362306a36Sopenharmony_ci#include <pci.h> 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ciu32 memsize, highmemsize; 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_civoid __init prom_init_memory(void) 1962306a36Sopenharmony_ci{ 2062306a36Sopenharmony_ci memblock_add(0x0, (memsize << 20)); 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG 2362306a36Sopenharmony_ci { 2462306a36Sopenharmony_ci int bit; 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ci bit = fls(memsize + highmemsize); 2762306a36Sopenharmony_ci if (bit != ffs(memsize + highmemsize)) 2862306a36Sopenharmony_ci bit += 20; 2962306a36Sopenharmony_ci else 3062306a36Sopenharmony_ci bit = bit + 20 - 1; 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci /* set cpu window3 to map CPU to DDR: 2G -> 2G */ 3362306a36Sopenharmony_ci LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul, 3462306a36Sopenharmony_ci 0x80000000ul, (1 << bit)); 3562306a36Sopenharmony_ci mmiowb(); 3662306a36Sopenharmony_ci } 3762306a36Sopenharmony_ci#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */ 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_ci#ifdef CONFIG_64BIT 4062306a36Sopenharmony_ci if (highmemsize > 0) 4162306a36Sopenharmony_ci memblock_add(LOONGSON_HIGHMEM_START, highmemsize << 20); 4262306a36Sopenharmony_ci#endif /* !CONFIG_64BIT */ 4362306a36Sopenharmony_ci} 44