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 
mips_nmi_setup(void)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 
prom_init(void)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 
prom_free_prom_memory(void)54 void __init prom_free_prom_memory(void)
55 {
56 }
57