1 /* 2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com> 3 * Scott McNutt <smcnutt@psyent.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <cpu.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <asm/cache.h> 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 #ifdef CONFIG_DISPLAY_CPUINFO 17 int print_cpuinfo(void) 18 { 19 printf("CPU: Nios-II\n"); 20 return 0; 21 } 22 #endif /* CONFIG_DISPLAY_CPUINFO */ 23 24 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 25 { 26 disable_interrupts(); 27 /* indirect call to go beyond 256MB limitation of toolchain */ 28 nios2_callr(gd->arch.reset_addr); 29 return 0; 30 } 31 32 int arch_cpu_init_dm(void) 33 { 34 struct udevice *dev; 35 int ret; 36 37 ret = uclass_first_device(UCLASS_CPU, &dev); 38 if (ret) 39 return ret; 40 if (!dev) 41 return -ENODEV; 42 43 gd->ram_size = CONFIG_SYS_SDRAM_SIZE; 44 45 return 0; 46 } 47 48 static int altera_nios2_get_desc(struct udevice *dev, char *buf, int size) 49 { 50 const char *cpu_name = "Nios-II"; 51 52 if (size < strlen(cpu_name)) 53 return -ENOSPC; 54 strcpy(buf, cpu_name); 55 56 return 0; 57 } 58 59 static int altera_nios2_get_info(struct udevice *dev, struct cpu_info *info) 60 { 61 info->cpu_freq = gd->cpu_clk; 62 info->features = (1 << CPU_FEAT_L1_CACHE) | 63 (gd->arch.has_mmu ? (1 << CPU_FEAT_MMU) : 0); 64 65 return 0; 66 } 67 68 static int altera_nios2_get_count(struct udevice *dev) 69 { 70 return 1; 71 } 72 73 static int altera_nios2_probe(struct udevice *dev) 74 { 75 const void *blob = gd->fdt_blob; 76 int node = dev->of_offset; 77 78 gd->cpu_clk = fdtdec_get_int(blob, node, 79 "clock-frequency", 0); 80 gd->arch.dcache_line_size = fdtdec_get_int(blob, node, 81 "dcache-line-size", 0); 82 gd->arch.icache_line_size = fdtdec_get_int(blob, node, 83 "icache-line-size", 0); 84 gd->arch.dcache_size = fdtdec_get_int(blob, node, 85 "dcache-size", 0); 86 gd->arch.icache_size = fdtdec_get_int(blob, node, 87 "icache-size", 0); 88 gd->arch.reset_addr = fdtdec_get_int(blob, node, 89 "altr,reset-addr", 0); 90 gd->arch.exception_addr = fdtdec_get_int(blob, node, 91 "altr,exception-addr", 0); 92 gd->arch.has_initda = fdtdec_get_int(blob, node, 93 "altr,has-initda", 0); 94 gd->arch.has_mmu = fdtdec_get_int(blob, node, 95 "altr,has-mmu", 0); 96 gd->arch.io_region_base = gd->arch.has_mmu ? 0xe0000000 : 0x8000000; 97 98 return 0; 99 } 100 101 static const struct cpu_ops altera_nios2_ops = { 102 .get_desc = altera_nios2_get_desc, 103 .get_info = altera_nios2_get_info, 104 .get_count = altera_nios2_get_count, 105 }; 106 107 static const struct udevice_id altera_nios2_ids[] = { 108 { .compatible = "altr,nios2-1.0" }, 109 { .compatible = "altr,nios2-1.1" }, 110 { } 111 }; 112 113 U_BOOT_DRIVER(altera_nios2) = { 114 .name = "altera_nios2", 115 .id = UCLASS_CPU, 116 .of_match = altera_nios2_ids, 117 .probe = altera_nios2_probe, 118 .ops = &altera_nios2_ops, 119 .flags = DM_FLAG_PRE_RELOC, 120 }; 121