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 <asm/bootinfo.h> 18 #include <loongson.h> 19 #include <boot_param.h> 20 #include <builtin_dtbs.h> 21 #include <workarounds.h> 22 23 u32 cpu_clock_freq; 24 EXPORT_SYMBOL(cpu_clock_freq); 25 struct efi_memory_map_loongson *loongson_memmap; 26 struct loongson_system_configuration loongson_sysconf; 27 28 u64 loongson_chipcfg[MAX_PACKAGES] = {0xffffffffbfc00180}; 29 u64 loongson_chiptemp[MAX_PACKAGES]; 30 u64 loongson_freqctrl[MAX_PACKAGES]; 31 32 unsigned long long smp_group[4]; 33 34 const char *get_system_type(void) 35 { 36 return "Generic Loongson64 System"; 37 } 38 39 void __init prom_init_env(void) 40 { 41 struct boot_params *boot_p; 42 struct loongson_params *loongson_p; 43 struct system_loongson *esys; 44 struct efi_cpuinfo_loongson *ecpu; 45 struct irq_source_routing_table *eirq_source; 46 47 /* firmware arguments are initialized in head.S */ 48 boot_p = (struct boot_params *)fw_arg2; 49 loongson_p = &(boot_p->efi.smbios.lp); 50 51 esys = (struct system_loongson *) 52 ((u64)loongson_p + loongson_p->system_offset); 53 ecpu = (struct efi_cpuinfo_loongson *) 54 ((u64)loongson_p + loongson_p->cpu_offset); 55 eirq_source = (struct irq_source_routing_table *) 56 ((u64)loongson_p + loongson_p->irq_offset); 57 loongson_memmap = (struct efi_memory_map_loongson *) 58 ((u64)loongson_p + loongson_p->memory_offset); 59 60 cpu_clock_freq = ecpu->cpu_clock_freq; 61 loongson_sysconf.cputype = ecpu->cputype; 62 switch (ecpu->cputype) { 63 case Legacy_3A: 64 case Loongson_3A: 65 loongson_sysconf.cores_per_node = 4; 66 loongson_sysconf.cores_per_package = 4; 67 smp_group[0] = 0x900000003ff01000; 68 smp_group[1] = 0x900010003ff01000; 69 smp_group[2] = 0x900020003ff01000; 70 smp_group[3] = 0x900030003ff01000; 71 loongson_chipcfg[0] = 0x900000001fe00180; 72 loongson_chipcfg[1] = 0x900010001fe00180; 73 loongson_chipcfg[2] = 0x900020001fe00180; 74 loongson_chipcfg[3] = 0x900030001fe00180; 75 loongson_chiptemp[0] = 0x900000001fe0019c; 76 loongson_chiptemp[1] = 0x900010001fe0019c; 77 loongson_chiptemp[2] = 0x900020001fe0019c; 78 loongson_chiptemp[3] = 0x900030001fe0019c; 79 loongson_freqctrl[0] = 0x900000001fe001d0; 80 loongson_freqctrl[1] = 0x900010001fe001d0; 81 loongson_freqctrl[2] = 0x900020001fe001d0; 82 loongson_freqctrl[3] = 0x900030001fe001d0; 83 loongson_sysconf.ht_control_base = 0x90000EFDFB000000; 84 loongson_sysconf.workarounds = WORKAROUND_CPUFREQ; 85 break; 86 case Legacy_3B: 87 case Loongson_3B: 88 loongson_sysconf.cores_per_node = 4; /* One chip has 2 nodes */ 89 loongson_sysconf.cores_per_package = 8; 90 smp_group[0] = 0x900000003ff01000; 91 smp_group[1] = 0x900010003ff05000; 92 smp_group[2] = 0x900020003ff09000; 93 smp_group[3] = 0x900030003ff0d000; 94 loongson_chipcfg[0] = 0x900000001fe00180; 95 loongson_chipcfg[1] = 0x900020001fe00180; 96 loongson_chipcfg[2] = 0x900040001fe00180; 97 loongson_chipcfg[3] = 0x900060001fe00180; 98 loongson_chiptemp[0] = 0x900000001fe0019c; 99 loongson_chiptemp[1] = 0x900020001fe0019c; 100 loongson_chiptemp[2] = 0x900040001fe0019c; 101 loongson_chiptemp[3] = 0x900060001fe0019c; 102 loongson_freqctrl[0] = 0x900000001fe001d0; 103 loongson_freqctrl[1] = 0x900020001fe001d0; 104 loongson_freqctrl[2] = 0x900040001fe001d0; 105 loongson_freqctrl[3] = 0x900060001fe001d0; 106 loongson_sysconf.ht_control_base = 0x90001EFDFB000000; 107 loongson_sysconf.workarounds = WORKAROUND_CPUHOTPLUG; 108 break; 109 default: 110 loongson_sysconf.cores_per_node = 1; 111 loongson_sysconf.cores_per_package = 1; 112 loongson_chipcfg[0] = 0x900000001fe00180; 113 } 114 115 loongson_sysconf.nr_cpus = ecpu->nr_cpus; 116 loongson_sysconf.boot_cpu_id = ecpu->cpu_startup_core_id; 117 loongson_sysconf.reserved_cpus_mask = ecpu->reserved_cores_mask; 118 if (ecpu->nr_cpus > NR_CPUS || ecpu->nr_cpus == 0) 119 loongson_sysconf.nr_cpus = NR_CPUS; 120 loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus + 121 loongson_sysconf.cores_per_node - 1) / 122 loongson_sysconf.cores_per_node; 123 124 if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64C) { 125 switch (read_c0_prid() & PRID_REV_MASK) { 126 case PRID_REV_LOONGSON3A_R1: 127 case PRID_REV_LOONGSON3A_R2_0: 128 case PRID_REV_LOONGSON3A_R2_1: 129 case PRID_REV_LOONGSON3A_R3_0: 130 case PRID_REV_LOONGSON3A_R3_1: 131 loongson_fdt_blob = __dtb_loongson3_4core_rs780e_begin; 132 break; 133 case PRID_REV_LOONGSON3B_R1: 134 case PRID_REV_LOONGSON3B_R2: 135 loongson_fdt_blob = __dtb_loongson3_8core_rs780e_begin; 136 break; 137 default: 138 break; 139 } 140 } 141 142 143 if (!loongson_fdt_blob) 144 pr_err("Failed to determine built-in Loongson64 dtb\n"); 145 146 loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr; 147 loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr; 148 loongson_sysconf.pci_io_base = eirq_source->pci_io_start_addr; 149 loongson_sysconf.dma_mask_bits = eirq_source->dma_mask_bits; 150 if (loongson_sysconf.dma_mask_bits < 32 || 151 loongson_sysconf.dma_mask_bits > 64) 152 loongson_sysconf.dma_mask_bits = 32; 153 154 loongson_sysconf.restart_addr = boot_p->reset_system.ResetWarm; 155 loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown; 156 loongson_sysconf.suspend_addr = boot_p->reset_system.DoSuspend; 157 158 loongson_sysconf.vgabios_addr = boot_p->efi.smbios.vga_bios; 159 pr_debug("Shutdown Addr: %llx, Restart Addr: %llx, VBIOS Addr: %llx\n", 160 loongson_sysconf.poweroff_addr, loongson_sysconf.restart_addr, 161 loongson_sysconf.vgabios_addr); 162 163 memset(loongson_sysconf.ecname, 0, 32); 164 if (esys->has_ec) 165 memcpy(loongson_sysconf.ecname, esys->ec_name, 32); 166 loongson_sysconf.workarounds |= esys->workarounds; 167 168 loongson_sysconf.nr_uarts = esys->nr_uarts; 169 if (esys->nr_uarts < 1 || esys->nr_uarts > MAX_UARTS) 170 loongson_sysconf.nr_uarts = 1; 171 memcpy(loongson_sysconf.uarts, esys->uarts, 172 sizeof(struct uart_device) * loongson_sysconf.nr_uarts); 173 174 loongson_sysconf.nr_sensors = esys->nr_sensors; 175 if (loongson_sysconf.nr_sensors > MAX_SENSORS) 176 loongson_sysconf.nr_sensors = 0; 177 if (loongson_sysconf.nr_sensors) 178 memcpy(loongson_sysconf.sensors, esys->sensors, 179 sizeof(struct sensor_device) * loongson_sysconf.nr_sensors); 180 pr_info("CpuClock = %u\n", cpu_clock_freq); 181 } 182