arch/mips/loongson64/init.c

   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         /* 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
 112 static void __init prom_init_memory(void)
 113 {
 114         szmem(0);
 115 }
 116 #endif
 117
 118 void __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
 152 static 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
 188 static __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
 225 void __init arch_init_irq(void)
 226 {
 227         reserve_pio_range();
 228         irqchip_init();
 229 }