arch/mips/loongson2ef/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 #include <asm/fw/fw.h>
  13
  14 #include <loongson.h>
  15
  16 /* Loongson CPU address windows config space base address */
  17 unsigned long __maybe_unused _loongson_addrwincfg_base;
  18
  19 static void __init mips_nmi_setup(void)
  20 {
  21         void *base;
  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
  28 void __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         fw_init_cmdline();
  36         prom_init_machtype();
  37         prom_init_env();
  38
  39         /* init base address of io space */
  40         set_io_port_base((unsigned long)
  41                 ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
  42         prom_init_memory();
  43
  44         /*init the uart base address */
  45         prom_init_uart_base();
  46         board_nmi_handler_setup = mips_nmi_setup;
  47 }