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 is needed by the VPE loader code, just set it to 0 and assume 27 * that the firmware hardcodes this value to something useful. 28 */ 29 unsigned long physical_memsize = 0L; 30 31 /* 32 * this struct is filled by the soc specific detection code and holds 33 * information about the specific soc type, revision and name 34 */ 35 static struct ltq_soc_info soc_info; 36 37 const char *get_system_type(void) 38 { 39 return soc_info.sys_type; 40 } 41 42 int ltq_soc_type(void) 43 { 44 return soc_info.type; 45 } 46 47 static void __init prom_init_cmdline(void) 48 { 49 int argc = fw_arg0; 50 char **argv = (char **) KSEG1ADDR(fw_arg1); 51 int i; 52 53 arcs_cmdline[0] = '\0'; 54 55 for (i = 0; i < argc; i++) { 56 char *p = (char *) KSEG1ADDR(argv[i]); 57 58 if (CPHYSADDR(p) && *p) { 59 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline)); 60 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); 61 } 62 } 63 } 64 65 void __init plat_mem_setup(void) 66 { 67 void *dtb; 68 69 ioport_resource.start = IOPORT_RESOURCE_START; 70 ioport_resource.end = IOPORT_RESOURCE_END; 71 iomem_resource.start = IOMEM_RESOURCE_START; 72 iomem_resource.end = IOMEM_RESOURCE_END; 73 74 set_io_port_base((unsigned long) KSEG1); 75 76 if (fw_passed_dtb) /* UHI interface */ 77 dtb = (void *)fw_passed_dtb; 78 else if (&__dtb_start != &__dtb_end) 79 dtb = (void *)__dtb_start; 80 else 81 panic("no dtb found"); 82 83 /* 84 * Load the devicetree. This causes the chosen node to be 85 * parsed resulting in our memory appearing 86 */ 87 __dt_setup_arch(dtb); 88 } 89 90 void __init device_tree_init(void) 91 { 92 unflatten_and_copy_device_tree(); 93 } 94 95 void __init prom_init(void) 96 { 97 /* call the soc specific detetcion code and get it to fill soc_info */ 98 ltq_soc_detect(&soc_info); 99 snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s", 100 soc_info.name, soc_info.rev_type); 101 soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0'; 102 pr_info("SoC: %s\n", soc_info.sys_type); 103 prom_init_cmdline(); 104 105 #if defined(CONFIG_MIPS_MT_SMP) 106 if (register_vsmp_smp_ops()) 107 panic("failed to register_vsmp_smp_ops()"); 108 #endif 109 } 110