arch/mips/loongson64/env.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Based on Ocelot Linux port, which is
   4  * Copyright 2001 MontaVista Software Inc.
   5  * Author: jsun@mvista.com or jsun@junsun.net
   6  *
   7  * Copyright 2003 ICT CAS
   8  * Author: Michael Guo <guoyi@ict.ac.cn>
   9  *
  10  * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
  11  * Author: Fuxin Zhang, zhangfx@lemote.com
  12  *
  13  * Copyright (C) 2009 Lemote Inc.
  14  * Author: Wu Zhangjin, wuzhangjin@gmail.com
  15  */
  16
  17 #include <linux/dma-map-ops.h>
  18 #include <linux/export.h>
  19 #include <linux/pci_ids.h>
  20 #include <asm/bootinfo.h>
  21 #include <loongson.h>
  22 #include <boot_param.h>
  23 #include <builtin_dtbs.h>
  24 #include <workarounds.h>
  25
  26 #define HOST_BRIDGE_CONFIG_ADDR ((void __iomem *)TO_UNCAC(0x1a000000))
  27
  28 u32 cpu_clock_freq;
  29 EXPORT_SYMBOL(cpu_clock_freq);
  30 struct efi_memory_map_loongson *loongson_memmap;
  31 struct loongson_system_configuration loongson_sysconf;
  32
  33 struct board_devices *eboard;
  34 struct interface_info *einter;
  35 struct loongson_special_attribute *especial;
  36
  37 u64 loongson_chipcfg[MAX_PACKAGES] = {0xffffffffbfc00180};
  38 u64 loongson_chiptemp[MAX_PACKAGES];
  39 u64 loongson_freqctrl[MAX_PACKAGES];
  40
  41 unsigned long long smp_group[4];
  42
  43 const char *get_system_type(void)
  44 {
  45         return "Generic Loongson64 System";
  46 }
  47
  48
  49 void __init prom_dtb_init_env(void)
  50 {
  51         if ((fw_arg2 < CKSEG0 || fw_arg2 > CKSEG1)
  52                 && (fw_arg2 < XKPHYS || fw_arg2 > XKSEG))
  53
  54                 loongson_fdt_blob = __dtb_loongson64_2core_2k1000_begin;
  55         else
  56                 loongson_fdt_blob = (void *)fw_arg2;
  57 }
  58
  59 void __init prom_lefi_init_env(void)
  60 {
  61         struct boot_params *boot_p;
  62         struct loongson_params *loongson_p;
  63         struct system_loongson *esys;
  64         struct efi_cpuinfo_loongson *ecpu;
  65         struct irq_source_routing_table *eirq_source;
  66         u32 id;
  67         u16 vendor;
  68
  69         /* firmware arguments are initialized in head.S */
  70         boot_p = (struct boot_params *)fw_arg2;
  71         loongson_p = &(boot_p->efi.smbios.lp);
  72
  73         esys = (struct system_loongson *)
  74                 ((u64)loongson_p + loongson_p->system_offset);
  75         ecpu = (struct efi_cpuinfo_loongson *)
  76                 ((u64)loongson_p + loongson_p->cpu_offset);
  77         eboard = (struct board_devices *)
  78                 ((u64)loongson_p + loongson_p->boarddev_table_offset);
  79         einter = (struct interface_info *)
  80                 ((u64)loongson_p + loongson_p->interface_offset);
  81         especial = (struct loongson_special_attribute *)
  82                 ((u64)loongson_p + loongson_p->special_offset);
  83         eirq_source = (struct irq_source_routing_table *)
  84                 ((u64)loongson_p + loongson_p->irq_offset);
  85         loongson_memmap = (struct efi_memory_map_loongson *)
  86                 ((u64)loongson_p + loongson_p->memory_offset);
  87
  88         cpu_clock_freq = ecpu->cpu_clock_freq;
  89         loongson_sysconf.cputype = ecpu->cputype;
  90         switch (ecpu->cputype) {
  91         case Legacy_3A:
  92         case Loongson_3A:
  93                 loongson_sysconf.cores_per_node = 4;
  94                 loongson_sysconf.cores_per_package = 4;
  95                 smp_group[0] = 0x900000003ff01000;
  96                 smp_group[1] = 0x900010003ff01000;
  97                 smp_group[2] = 0x900020003ff01000;
  98                 smp_group[3] = 0x900030003ff01000;
  99                 loongson_chipcfg[0] = 0x900000001fe00180;
 100                 loongson_chipcfg[1] = 0x900010001fe00180;
 101                 loongson_chipcfg[2] = 0x900020001fe00180;
 102                 loongson_chipcfg[3] = 0x900030001fe00180;
 103                 loongson_chiptemp[0] = 0x900000001fe0019c;
 104                 loongson_chiptemp[1] = 0x900010001fe0019c;
 105                 loongson_chiptemp[2] = 0x900020001fe0019c;
 106                 loongson_chiptemp[3] = 0x900030001fe0019c;
 107                 loongson_freqctrl[0] = 0x900000001fe001d0;
 108                 loongson_freqctrl[1] = 0x900010001fe001d0;
 109                 loongson_freqctrl[2] = 0x900020001fe001d0;
 110                 loongson_freqctrl[3] = 0x900030001fe001d0;
 111                 loongson_sysconf.workarounds = WORKAROUND_CPUFREQ;
 112                 break;
 113         case Legacy_3B:
 114         case Loongson_3B:
 115                 loongson_sysconf.cores_per_node = 4; /* One chip has 2 nodes */
 116                 loongson_sysconf.cores_per_package = 8;
 117                 smp_group[0] = 0x900000003ff01000;
 118                 smp_group[1] = 0x900010003ff05000;
 119                 smp_group[2] = 0x900020003ff09000;
 120                 smp_group[3] = 0x900030003ff0d000;
 121                 loongson_chipcfg[0] = 0x900000001fe00180;
 122                 loongson_chipcfg[1] = 0x900020001fe00180;
 123                 loongson_chipcfg[2] = 0x900040001fe00180;
 124                 loongson_chipcfg[3] = 0x900060001fe00180;
 125                 loongson_chiptemp[0] = 0x900000001fe0019c;
 126                 loongson_chiptemp[1] = 0x900020001fe0019c;
 127                 loongson_chiptemp[2] = 0x900040001fe0019c;
 128                 loongson_chiptemp[3] = 0x900060001fe0019c;
 129                 loongson_freqctrl[0] = 0x900000001fe001d0;
 130                 loongson_freqctrl[1] = 0x900020001fe001d0;
 131                 loongson_freqctrl[2] = 0x900040001fe001d0;
 132                 loongson_freqctrl[3] = 0x900060001fe001d0;
 133                 loongson_sysconf.workarounds = WORKAROUND_CPUHOTPLUG;
 134                 break;
 135         default:
 136                 loongson_sysconf.cores_per_node = 1;
 137                 loongson_sysconf.cores_per_package = 1;
 138                 loongson_chipcfg[0] = 0x900000001fe00180;
 139         }
 140
 141         loongson_sysconf.nr_cpus = ecpu->nr_cpus;
 142         loongson_sysconf.boot_cpu_id = ecpu->cpu_startup_core_id;
 143         loongson_sysconf.reserved_cpus_mask = ecpu->reserved_cores_mask;
 144         if (ecpu->nr_cpus > NR_CPUS || ecpu->nr_cpus == 0)
 145                 loongson_sysconf.nr_cpus = NR_CPUS;
 146         loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus +
 147                 loongson_sysconf.cores_per_node - 1) /
 148                 loongson_sysconf.cores_per_node;
 149
 150         loongson_sysconf.dma_mask_bits = eirq_source->dma_mask_bits;
 151         if (loongson_sysconf.dma_mask_bits < 32 ||
 152                         loongson_sysconf.dma_mask_bits > 64) {
 153                 loongson_sysconf.dma_mask_bits = 32;
 154                 dma_default_coherent = true;
 155         } else {
 156                 dma_default_coherent = !eirq_source->dma_noncoherent;
 157         }
 158
 159         pr_info("Firmware: Coherent DMA: %s\n", dma_default_coherent ? "on" : "off");
 160
 161         loongson_sysconf.restart_addr = boot_p->reset_system.ResetWarm;
 162         loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown;
 163         loongson_sysconf.suspend_addr = boot_p->reset_system.DoSuspend;
 164
 165         loongson_sysconf.vgabios_addr = boot_p->efi.smbios.vga_bios;
 166         pr_debug("Shutdown Addr: %llx, Restart Addr: %llx, VBIOS Addr: %llx\n",
 167                 loongson_sysconf.poweroff_addr, loongson_sysconf.restart_addr,
 168                 loongson_sysconf.vgabios_addr);
 169
 170         loongson_sysconf.workarounds |= esys->workarounds;
 171
 172         pr_info("CpuClock = %u\n", cpu_clock_freq);
 173
 174         /* Read the ID of PCI host bridge to detect bridge type */
 175         id = readl(HOST_BRIDGE_CONFIG_ADDR);
 176         vendor = id & 0xffff;
 177
 178         switch (vendor) {
 179         case PCI_VENDOR_ID_LOONGSON:
 180                 pr_info("The bridge chip is LS7A\n");
 181                 loongson_sysconf.bridgetype = LS7A;
 182                 loongson_sysconf.early_config = ls7a_early_config;
 183                 break;
 184         case PCI_VENDOR_ID_AMD:
 185         case PCI_VENDOR_ID_ATI:
 186                 pr_info("The bridge chip is RS780E or SR5690\n");
 187                 loongson_sysconf.bridgetype = RS780E;
 188                 loongson_sysconf.early_config = rs780e_early_config;
 189                 break;
 190         default:
 191                 pr_info("The bridge chip is VIRTUAL\n");
 192                 loongson_sysconf.bridgetype = VIRTUAL;
 193                 loongson_sysconf.early_config = virtual_early_config;
 194                 loongson_fdt_blob = __dtb_loongson64v_4core_virtio_begin;
 195                 break;
 196         }
 197
 198         if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64C) {
 199                 switch (read_c0_prid() & PRID_REV_MASK) {
 200                 case PRID_REV_LOONGSON3A_R1:
 201                 case PRID_REV_LOONGSON3A_R2_0:
 202                 case PRID_REV_LOONGSON3A_R2_1:
 203                 case PRID_REV_LOONGSON3A_R3_0:
 204                 case PRID_REV_LOONGSON3A_R3_1:
 205                         switch (loongson_sysconf.bridgetype) {
 206                         case LS7A:
 207                                 loongson_fdt_blob = __dtb_loongson64c_4core_ls7a_begin;
 208                                 break;
 209                         case RS780E:
 210                                 loongson_fdt_blob = __dtb_loongson64c_4core_rs780e_begin;
 211                                 break;
 212                         default:
 213                                 break;
 214                         }
 215                         break;
 216                 case PRID_REV_LOONGSON3B_R1:
 217                 case PRID_REV_LOONGSON3B_R2:
 218                         if (loongson_sysconf.bridgetype == RS780E)
 219                                 loongson_fdt_blob = __dtb_loongson64c_8core_rs780e_begin;
 220                         break;
 221                 default:
 222                         break;
 223                 }
 224         } else if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64G) {
 225                 if (loongson_sysconf.bridgetype == LS7A)
 226                         loongson_fdt_blob = __dtb_loongson64g_4core_ls7a_begin;
 227         }
 228
 229         if (!loongson_fdt_blob)
 230                 pr_err("Failed to determine built-in Loongson64 dtb\n");
 231 }