forked from Minki/linux
c461731836
Multiple Loongson-3A chips can be interconnected with HT0-bus. This is a CC-NUMA system that every chip (node) has its own local memory and cache coherency is maintained by hardware. The 64-bit physical memory address format is as follows: 0x-0000-YZZZ-ZZZZ-ZZZZ The high 16 bits should be 0, which means the real physical address supported by Loongson-3 is 48-bit. The "Y" bits is the base address of each node, which can be also considered as the node-id. The "Z" bits is the address offset within a node, which means every node has a 44 bits address space. Macros XPHYSADDR and MAX_PHYSMEM_BITS are modified unconditionally, because many other MIPS CPUs have also extended their address spaces. Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/7187/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
|
|
* Copyright (C) 2009 Lemote Inc.
|
|
* Author: Wu Zhangjin, wuzhangjin@gmail.com
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <linux/bootmem.h>
|
|
#include <asm/smp-ops.h>
|
|
|
|
#include <loongson.h>
|
|
|
|
/* Loongson CPU address windows config space base address */
|
|
unsigned long __maybe_unused _loongson_addrwincfg_base;
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
|
|
_loongson_addrwincfg_base = (unsigned long)
|
|
ioremap(LOONGSON_ADDRWINCFG_BASE, LOONGSON_ADDRWINCFG_SIZE);
|
|
#endif
|
|
|
|
prom_init_cmdline();
|
|
prom_init_env();
|
|
|
|
/* init base address of io space */
|
|
set_io_port_base((unsigned long)
|
|
ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
|
|
|
|
#ifdef CONFIG_NUMA
|
|
prom_init_numa_memory();
|
|
#else
|
|
prom_init_memory();
|
|
#endif
|
|
|
|
/*init the uart base address */
|
|
prom_init_uart_base();
|
|
register_smp_ops(&loongson3_smp_ops);
|
|
}
|
|
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
}
|