1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Copyright (C) 2010 John Crispin <john@phrozen.org> 5 */ 6 7 #include <linux/export.h> 8 #include <linux/clk.h> 9 #include <linux/memblock.h> 10 #include <linux/of_fdt.h> 11 12 #include <asm/bootinfo.h> 13 #include <asm/time.h> 14 #include <asm/prom.h> 15 16 #include <lantiq.h> 17 18 #include "prom.h" 19 #include "clk.h" 20 21 /* access to the ebu needs to be locked between different drivers */ 22 DEFINE_SPINLOCK(ebu_lock); 23 EXPORT_SYMBOL_GPL(ebu_lock); 24 25 /* 26 * this struct is filled by the soc specific detection code and holds 27 * information about the specific soc type, revision and name 28 */ 29 static struct ltq_soc_info soc_info; 30 31 /* 32 * These structs are used to override vsmp_init_secondary() 33 */ 34 #if defined(CONFIG_MIPS_MT_SMP) 35 extern const struct plat_smp_ops vsmp_smp_ops; 36 static struct plat_smp_ops lantiq_smp_ops; 37 #endif 38 39 const char *get_system_type(void) 40 { 41 return soc_info.sys_type; 42 } 43 44 int ltq_soc_type(void) 45 { 46 return soc_info.type; 47 } 48 49 static void __init prom_init_cmdline(void) 50 { 51 int argc = fw_arg0; 52 char **argv = (char **) KSEG1ADDR(fw_arg1); 53 int i; 54 55 arcs_cmdline[0] = '\0'; 56 57 for (i = 0; i < argc; i++) { 58 char *p = (char *) KSEG1ADDR(argv[i]); 59 60 if (CPHYSADDR(p) && *p) { 61 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline)); 62 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); 63 } 64 } 65 } 66 67 void __init plat_mem_setup(void) 68 { 69 void *dtb; 70 71 ioport_resource.start = IOPORT_RESOURCE_START; 72 ioport_resource.end = IOPORT_RESOURCE_END; 73 iomem_resource.start = IOMEM_RESOURCE_START; 74 iomem_resource.end = IOMEM_RESOURCE_END; 75 76 set_io_port_base((unsigned long) KSEG1); 77 78 dtb = get_fdt(); 79 if (dtb == NULL) 80 panic("no dtb found"); 81 82 /* 83 * Load the devicetree. This causes the chosen node to be 84 * parsed resulting in our memory appearing 85 */ 86 __dt_setup_arch(dtb); 87 } 88 89 #if defined(CONFIG_MIPS_MT_SMP) 90 static void lantiq_init_secondary(void) 91 { 92 /* 93 * MIPS CPU startup function vsmp_init_secondary() will only 94 * enable some of the interrupts for the second CPU/VPE. 95 */ 96 set_c0_status(ST0_IM); 97 } 98 #endif 99 100 void __init prom_init(void) 101 { 102 /* call the soc specific detetcion code and get it to fill soc_info */ 103 ltq_soc_detect(&soc_info); 104 snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s", 105 soc_info.name, soc_info.rev_type); 106 soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0'; 107 pr_info("SoC: %s\n", soc_info.sys_type); 108 prom_init_cmdline(); 109 110 #if defined(CONFIG_MIPS_MT_SMP) 111 lantiq_smp_ops = vsmp_smp_ops; 112 if (cpu_has_mipsmt) 113 lantiq_smp_ops.init_secondary = lantiq_init_secondary; 114 register_smp_ops(&lantiq_smp_ops); 115 #endif 116 } 117