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 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 } 107 108 #ifndef CONFIG_NUMA 109 static void __init prom_init_memory(void) 110 { 111 szmem(0); 112 } 113 #endif 114 115 void __init prom_init(void) 116 { 117 fw_init_cmdline(); 118 119 if (fw_arg2 == 0 || (fdt_magic(fw_arg2) == FDT_MAGIC)) { 120 loongson_sysconf.fw_interface = LOONGSON_DTB; 121 prom_dtb_init_env(); 122 } else { 123 loongson_sysconf.fw_interface = LOONGSON_LEFI; 124 prom_lefi_init_env(); 125 } 126 127 /* init base address of io space */ 128 set_io_port_base(PCI_IOBASE); 129 130 if (loongson_sysconf.early_config) 131 loongson_sysconf.early_config(); 132 133 #ifdef CONFIG_NUMA 134 prom_init_numa_memory(); 135 #else 136 prom_init_memory(); 137 #endif 138 139 /* Hardcode to CPU UART 0 */ 140 if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64R) 141 setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE), 0, 1024); 142 else 143 setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024); 144 145 register_smp_ops(&loongson3_smp_ops); 146 board_nmi_handler_setup = mips_nmi_setup; 147 } 148 149 static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_t hw_start, 150 resource_size_t size) 151 { 152 int ret = 0; 153 struct logic_pio_hwaddr *range; 154 unsigned long vaddr; 155 156 range = kzalloc(sizeof(*range), GFP_ATOMIC); 157 if (!range) 158 return -ENOMEM; 159 160 range->fwnode = fwnode; 161 range->size = size = round_up(size, PAGE_SIZE); 162 range->hw_start = hw_start; 163 range->flags = LOGIC_PIO_CPU_MMIO; 164 165 ret = logic_pio_register_range(range); 166 if (ret) { 167 kfree(range); 168 return ret; 169 } 170 171 /* Legacy ISA must placed at the start of PCI_IOBASE */ 172 if (range->io_start != 0) { 173 logic_pio_unregister_range(range); 174 kfree(range); 175 return -EINVAL; 176 } 177 178 vaddr = PCI_IOBASE + range->io_start; 179 180 ioremap_page_range(vaddr, vaddr + size, hw_start, pgprot_device(PAGE_KERNEL)); 181 182 return 0; 183 } 184 185 static __init void reserve_pio_range(void) 186 { 187 struct device_node *np; 188 189 for_each_node_by_name(np, "isa") { 190 struct of_range range; 191 struct of_range_parser parser; 192 193 pr_info("ISA Bridge: %pOF\n", np); 194 195 if (of_range_parser_init(&parser, np)) { 196 pr_info("Failed to parse resources.\n"); 197 of_node_put(np); 198 break; 199 } 200 201 for_each_of_range(&parser, &range) { 202 switch (range.flags & IORESOURCE_TYPE_BITS) { 203 case IORESOURCE_IO: 204 pr_info(" IO 0x%016llx..0x%016llx -> 0x%016llx\n", 205 range.cpu_addr, 206 range.cpu_addr + range.size - 1, 207 range.bus_addr); 208 if (add_legacy_isa_io(&np->fwnode, range.cpu_addr, range.size)) 209 pr_warn("Failed to reserve legacy IO in Logic PIO\n"); 210 break; 211 case IORESOURCE_MEM: 212 pr_info(" MEM 0x%016llx..0x%016llx -> 0x%016llx\n", 213 range.cpu_addr, 214 range.cpu_addr + range.size - 1, 215 range.bus_addr); 216 break; 217 } 218 } 219 } 220 } 221 222 void __init arch_init_irq(void) 223 { 224 reserve_pio_range(); 225 irqchip_init(); 226 } 227