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