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/irqchip.h> 8 #include <linux/memblock.h> 9 #include <asm/bootinfo.h> 10 #include <asm/traps.h> 11 #include <asm/smp-ops.h> 12 #include <asm/cacheflush.h> 13 #include <asm/fw/fw.h> 14 15 #include <loongson.h> 16 17 static void __init mips_nmi_setup(void) 18 { 19 void *base; 20 extern char except_vec_nmi; 21 22 base = (void *)(CAC_BASE + 0x380); 23 memcpy(base, &except_vec_nmi, 0x80); 24 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80); 25 } 26 27 void __init prom_init(void) 28 { 29 fw_init_cmdline(); 30 prom_init_env(); 31 32 /* init base address of io space */ 33 set_io_port_base((unsigned long) 34 ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE)); 35 36 prom_init_numa_memory(); 37 38 /* Hardcode to CPU UART 0 */ 39 setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024); 40 41 register_smp_ops(&loongson3_smp_ops); 42 board_nmi_handler_setup = mips_nmi_setup; 43 } 44 45 void __init prom_free_prom_memory(void) 46 { 47 } 48 49 void __init arch_init_irq(void) 50 { 51 irqchip_init(); 52 } 53