LXR linux/arch/mips/loongson64/common/init.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (C) 2009 Lemote Inc.
   4 * Author: Wu Zhangjin, wuzhangjin@gmail.com
   5 */
   6
   7#include <linux/memblock.h>
   8#include <asm/bootinfo.h>
   9#include <asm/traps.h>
  10#include <asm/smp-ops.h>
  11#include <asm/cacheflush.h>
  12
  13#include <loongson.h>
  14
  15/* Loongson CPU address windows config space base address */
  16unsigned long __maybe_unused _loongson_addrwincfg_base;
  17
  18static void __init mips_nmi_setup(void)
  19{
  20        void *base;
  21        extern char except_vec_nmi;
  22
  23        base = (void *)(CAC_BASE + 0x380);
  24        memcpy(base, &except_vec_nmi, 0x80);
  25        flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
  26}
  27
  28void __init prom_init(void)
  29{
  30#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
  31        _loongson_addrwincfg_base = (unsigned long)
  32                ioremap(LOONGSON_ADDRWINCFG_BASE, LOONGSON_ADDRWINCFG_SIZE);
  33#endif
  34
  35        prom_init_cmdline();
  36        prom_init_env();
  37
  38        /* init base address of io space */
  39        set_io_port_base((unsigned long)
  40                ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
  41
  42#ifdef CONFIG_NUMA
  43        prom_init_numa_memory();
  44#else
  45        prom_init_memory();
  46#endif
  47
  48        /*init the uart base address */
  49        prom_init_uart_base();
  50        register_smp_ops(&loongson3_smp_ops);
  51        board_nmi_handler_setup = mips_nmi_setup;
  52}
  53
  54void __init prom_free_prom_memory(void)
  55{
  56}
  57