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 */
  16 unsigned long __maybe_unused _loongson_addrwincfg_base;
  17
  18 static 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
  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         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
  54 void __init prom_free_prom_memory(void)
  55 {
  56 }