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/logic_pio.h>
9#include <linux/memblock.h>
10#include <linux/of.h>
11#include <linux/of_address.h>
12#include <asm/bootinfo.h>
13#include <asm/traps.h>
14#include <asm/smp-ops.h>
15#include <asm/cacheflush.h>
16#include <asm/fw/fw.h>
17
18#include <loongson.h>
19#include <boot_param.h>
20
21#define NODE_ID_OFFSET_ADDR	((void __iomem *)TO_UNCAC(0x1001041c))
22
23u32 node_id_offset;
24
25static void __init mips_nmi_setup(void)
26{
27	void *base;
28	extern char except_vec_nmi[];
29
30	base = (void *)(CAC_BASE + 0x380);
31	memcpy(base, except_vec_nmi, 0x80);
32	flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
33}
34
35void ls7a_early_config(void)
36{
37	node_id_offset = ((readl(NODE_ID_OFFSET_ADDR) >> 8) & 0x1f) + 36;
38}
39
40void rs780e_early_config(void)
41{
42	node_id_offset = 37;
43}
44
45void virtual_early_config(void)
46{
47	node_id_offset = 44;
48}
49
50void __init prom_init(void)
51{
52	fw_init_cmdline();
53	prom_init_env();
54
55	/* init base address of io space */
56	set_io_port_base(PCI_IOBASE);
57
58	loongson_sysconf.early_config();
59
60	prom_init_numa_memory();
61
62	/* Hardcode to CPU UART 0 */
63	setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
64
65	register_smp_ops(&loongson3_smp_ops);
66	board_nmi_handler_setup = mips_nmi_setup;
67}
68
69void __init prom_free_prom_memory(void)
70{
71}
72
73static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_t hw_start,
74				    resource_size_t size)
75{
76	int ret = 0;
77	struct logic_pio_hwaddr *range;
78	unsigned long vaddr;
79
80	range = kzalloc(sizeof(*range), GFP_ATOMIC);
81	if (!range)
82		return -ENOMEM;
83
84	range->fwnode = fwnode;
85	range->size = size = round_up(size, PAGE_SIZE);
86	range->hw_start = hw_start;
87	range->flags = LOGIC_PIO_CPU_MMIO;
88
89	ret = logic_pio_register_range(range);
90	if (ret) {
91		kfree(range);
92		return ret;
93	}
94
95	/* Legacy ISA must placed at the start of PCI_IOBASE */
96	if (range->io_start != 0) {
97		logic_pio_unregister_range(range);
98		kfree(range);
99		return -EINVAL;
100	}
101
102	vaddr = PCI_IOBASE + range->io_start;
103
104	ioremap_page_range(vaddr, vaddr + size, hw_start, pgprot_device(PAGE_KERNEL));
105
106	return 0;
107}
108
109static __init void reserve_pio_range(void)
110{
111	struct device_node *np;
112
113	for_each_node_by_name(np, "isa") {
114		struct of_range range;
115		struct of_range_parser parser;
116
117		pr_info("ISA Bridge: %pOF\n", np);
118
119		if (of_range_parser_init(&parser, np)) {
120			pr_info("Failed to parse resources.\n");
121			break;
122		}
123
124		for_each_of_range(&parser, &range) {
125			switch (range.flags & IORESOURCE_TYPE_BITS) {
126			case IORESOURCE_IO:
127				pr_info(" IO 0x%016llx..0x%016llx  ->  0x%016llx\n",
128					range.cpu_addr,
129					range.cpu_addr + range.size - 1,
130					range.bus_addr);
131				if (add_legacy_isa_io(&np->fwnode, range.cpu_addr, range.size))
132					pr_warn("Failed to reserve legacy IO in Logic PIO\n");
133				break;
134			case IORESOURCE_MEM:
135				pr_info(" MEM 0x%016llx..0x%016llx  ->  0x%016llx\n",
136					range.cpu_addr,
137					range.cpu_addr + range.size - 1,
138					range.bus_addr);
139				break;
140			}
141		}
142	}
143
144	/* Reserve vgabios if it comes from firmware */
145	if (loongson_sysconf.vgabios_addr)
146		memblock_reserve(virt_to_phys((void *)loongson_sysconf.vgabios_addr),
147				SZ_256K);
148}
149
150void __init arch_init_irq(void)
151{
152	reserve_pio_range();
153	irqchip_init();
154}
155