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
29	base = (void *)(CAC_BASE + 0x380);
30	memcpy(base, except_vec_nmi, 0x80);
31	flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
32}
33
34void ls7a_early_config(void)
35{
36	node_id_offset = ((readl(NODE_ID_OFFSET_ADDR) >> 8) & 0x1f) + 36;
37}
38
39void rs780e_early_config(void)
40{
41	node_id_offset = 37;
42}
43
44void virtual_early_config(void)
45{
46	node_id_offset = 44;
47}
48
49void __init szmem(unsigned int node)
50{
51	u32 i, mem_type;
52	phys_addr_t node_id, mem_start, mem_size;
53
54	/* Otherwise come from DTB */
55	if (loongson_sysconf.fw_interface != LOONGSON_LEFI)
56		return;
57
58	/* Parse memory information and activate */
59	for (i = 0; i < loongson_memmap->nr_map; i++) {
60		node_id = loongson_memmap->map[i].node_id;
61		if (node_id != node)
62			continue;
63
64		mem_type = loongson_memmap->map[i].mem_type;
65		mem_size = loongson_memmap->map[i].mem_size;
66
67		/* Memory size comes in MB if MEM_SIZE_IS_IN_BYTES not set */
68		if (mem_size & MEM_SIZE_IS_IN_BYTES)
69			mem_size &= ~MEM_SIZE_IS_IN_BYTES;
70		else
71			mem_size = mem_size << 20;
72
73		mem_start = (node_id << 44) | loongson_memmap->map[i].mem_start;
74
75		switch (mem_type) {
76		case SYSTEM_RAM_LOW:
77		case SYSTEM_RAM_HIGH:
78		case UMA_VIDEO_RAM:
79			pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes usable\n",
80				(u32)node_id, mem_type, &mem_start, &mem_size);
81			memblock_add_node(mem_start, mem_size, node,
82					  MEMBLOCK_NONE);
83			break;
84		case SYSTEM_RAM_RESERVED:
85		case VIDEO_ROM:
86		case ADAPTER_ROM:
87		case ACPI_TABLE:
88		case SMBIOS_TABLE:
89			pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes reserved\n",
90				(u32)node_id, mem_type, &mem_start, &mem_size);
91			memblock_reserve(mem_start, mem_size);
92			break;
93		/* We should not reserve VUMA_VIDEO_RAM as it overlaps with MMIO */
94		case VUMA_VIDEO_RAM:
95		default:
96			pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes unhandled\n",
97				(u32)node_id, mem_type, &mem_start, &mem_size);
98			break;
99		}
100	}
101
102	/* Reserve vgabios if it comes from firmware */
103	if (loongson_sysconf.vgabios_addr)
104		memblock_reserve(virt_to_phys((void *)loongson_sysconf.vgabios_addr),
105				SZ_256K);
106	/* set nid for reserved memory */
107	memblock_set_node((u64)node << 44, (u64)(node + 1) << 44,
108			&memblock.reserved, node);
109}
110
111#ifndef CONFIG_NUMA
112static void __init prom_init_memory(void)
113{
114	szmem(0);
115}
116#endif
117
118void __init prom_init(void)
119{
120	fw_init_cmdline();
121
122	if (fw_arg2 == 0 || (fdt_magic(fw_arg2) == FDT_MAGIC)) {
123		loongson_sysconf.fw_interface = LOONGSON_DTB;
124		prom_dtb_init_env();
125	} else {
126		loongson_sysconf.fw_interface = LOONGSON_LEFI;
127		prom_lefi_init_env();
128	}
129
130	/* init base address of io space */
131	set_io_port_base(PCI_IOBASE);
132
133	if (loongson_sysconf.early_config)
134		loongson_sysconf.early_config();
135
136#ifdef CONFIG_NUMA
137	prom_init_numa_memory();
138#else
139	prom_init_memory();
140#endif
141
142	/* Hardcode to CPU UART 0 */
143	if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64R)
144		setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE), 0, 1024);
145	else
146		setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
147
148	register_smp_ops(&loongson3_smp_ops);
149	board_nmi_handler_setup = mips_nmi_setup;
150}
151
152static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_t hw_start,
153				    resource_size_t size)
154{
155	int ret = 0;
156	struct logic_pio_hwaddr *range;
157	unsigned long vaddr;
158
159	range = kzalloc(sizeof(*range), GFP_ATOMIC);
160	if (!range)
161		return -ENOMEM;
162
163	range->fwnode = fwnode;
164	range->size = size = round_up(size, PAGE_SIZE);
165	range->hw_start = hw_start;
166	range->flags = LOGIC_PIO_CPU_MMIO;
167
168	ret = logic_pio_register_range(range);
169	if (ret) {
170		kfree(range);
171		return ret;
172	}
173
174	/* Legacy ISA must placed at the start of PCI_IOBASE */
175	if (range->io_start != 0) {
176		logic_pio_unregister_range(range);
177		kfree(range);
178		return -EINVAL;
179	}
180
181	vaddr = PCI_IOBASE + range->io_start;
182
183	vmap_page_range(vaddr, vaddr + size, hw_start, pgprot_device(PAGE_KERNEL));
184
185	return 0;
186}
187
188static __init void reserve_pio_range(void)
189{
190	struct device_node *np;
191
192	for_each_node_by_name(np, "isa") {
193		struct of_range range;
194		struct of_range_parser parser;
195
196		pr_info("ISA Bridge: %pOF\n", np);
197
198		if (of_range_parser_init(&parser, np)) {
199			pr_info("Failed to parse resources.\n");
200			of_node_put(np);
201			break;
202		}
203
204		for_each_of_range(&parser, &range) {
205			switch (range.flags & IORESOURCE_TYPE_BITS) {
206			case IORESOURCE_IO:
207				pr_info(" IO 0x%016llx..0x%016llx  ->  0x%016llx\n",
208					range.cpu_addr,
209					range.cpu_addr + range.size - 1,
210					range.bus_addr);
211				if (add_legacy_isa_io(&np->fwnode, range.cpu_addr, range.size))
212					pr_warn("Failed to reserve legacy IO in Logic PIO\n");
213				break;
214			case IORESOURCE_MEM:
215				pr_info(" MEM 0x%016llx..0x%016llx  ->  0x%016llx\n",
216					range.cpu_addr,
217					range.cpu_addr + range.size - 1,
218					range.bus_addr);
219				break;
220			}
221		}
222	}
223}
224
225void __init arch_init_irq(void)
226{
227	reserve_pio_range();
228	irqchip_init();
229}
230