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 23 u32 node_id_offset; 24 25 static 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 34 void ls7a_early_config(void) 35 { 36 node_id_offset = ((readl(NODE_ID_OFFSET_ADDR) >> 8) & 0x1f) + 36; 37 } 38 39 void rs780e_early_config(void) 40 { 41 node_id_offset = 37; 42 } 43 44 void virtual_early_config(void) 45 { 46 node_id_offset = 44; 47 } 48 49 void __init szmem(unsigned int node) 50 { 51 u32 i, mem_type; 52 static unsigned long num_physpages; 53 u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size; 54 55 /* Parse memory information and activate */ 56 for (i = 0; i < loongson_memmap->nr_map; i++) { 57 node_id = loongson_memmap->map[i].node_id; 58 if (node_id != node) 59 continue; 60 61 mem_type = loongson_memmap->map[i].mem_type; 62 mem_size = loongson_memmap->map[i].mem_size; 63 mem_start = loongson_memmap->map[i].mem_start; 64 65 switch (mem_type) { 66 case SYSTEM_RAM_LOW: 67 case SYSTEM_RAM_HIGH: 68 start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT; 69 node_psize = (mem_size << 20) >> PAGE_SHIFT; 70 end_pfn = start_pfn + node_psize; 71 num_physpages += node_psize; 72 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n", 73 (u32)node_id, mem_type, mem_start, mem_size); 74 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", 75 start_pfn, end_pfn, num_physpages); 76 memblock_add_node(PFN_PHYS(start_pfn), PFN_PHYS(node_psize), node); 77 break; 78 case SYSTEM_RAM_RESERVED: 79 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n", 80 (u32)node_id, mem_type, mem_start, mem_size); 81 memblock_reserve(((node_id << 44) + mem_start), mem_size << 20); 82 break; 83 } 84 } 85 } 86 87 #ifndef CONFIG_NUMA 88 static void __init prom_init_memory(void) 89 { 90 szmem(0); 91 } 92 #endif 93 94 void __init prom_init(void) 95 { 96 fw_init_cmdline(); 97 prom_init_env(); 98 99 /* init base address of io space */ 100 set_io_port_base(PCI_IOBASE); 101 102 loongson_sysconf.early_config(); 103 104 #ifdef CONFIG_NUMA 105 prom_init_numa_memory(); 106 #else 107 prom_init_memory(); 108 #endif 109 110 /* Hardcode to CPU UART 0 */ 111 setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024); 112 113 register_smp_ops(&loongson3_smp_ops); 114 board_nmi_handler_setup = mips_nmi_setup; 115 } 116 117 static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_t hw_start, 118 resource_size_t size) 119 { 120 int ret = 0; 121 struct logic_pio_hwaddr *range; 122 unsigned long vaddr; 123 124 range = kzalloc(sizeof(*range), GFP_ATOMIC); 125 if (!range) 126 return -ENOMEM; 127 128 range->fwnode = fwnode; 129 range->size = size; 130 range->hw_start = hw_start; 131 range->flags = LOGIC_PIO_CPU_MMIO; 132 133 ret = logic_pio_register_range(range); 134 if (ret) { 135 kfree(range); 136 return ret; 137 } 138 139 /* Legacy ISA must placed at the start of PCI_IOBASE */ 140 if (range->io_start != 0) { 141 logic_pio_unregister_range(range); 142 kfree(range); 143 return -EINVAL; 144 } 145 146 vaddr = PCI_IOBASE + range->io_start; 147 148 ioremap_page_range(vaddr, vaddr + size, hw_start, pgprot_device(PAGE_KERNEL)); 149 150 return 0; 151 } 152 153 static __init void reserve_pio_range(void) 154 { 155 struct device_node *np; 156 157 for_each_node_by_name(np, "isa") { 158 struct of_range range; 159 struct of_range_parser parser; 160 161 pr_info("ISA Bridge: %pOF\n", np); 162 163 if (of_range_parser_init(&parser, np)) { 164 pr_info("Failed to parse resources.\n"); 165 break; 166 } 167 168 for_each_of_range(&parser, &range) { 169 switch (range.flags & IORESOURCE_TYPE_BITS) { 170 case IORESOURCE_IO: 171 pr_info(" IO 0x%016llx..0x%016llx -> 0x%016llx\n", 172 range.cpu_addr, 173 range.cpu_addr + range.size - 1, 174 range.bus_addr); 175 if (add_legacy_isa_io(&np->fwnode, range.cpu_addr, range.size)) 176 pr_warn("Failed to reserve legacy IO in Logic PIO\n"); 177 break; 178 case IORESOURCE_MEM: 179 pr_info(" MEM 0x%016llx..0x%016llx -> 0x%016llx\n", 180 range.cpu_addr, 181 range.cpu_addr + range.size - 1, 182 range.bus_addr); 183 break; 184 } 185 } 186 } 187 } 188 189 void __init arch_init_irq(void) 190 { 191 reserve_pio_range(); 192 irqchip_init(); 193 } 194