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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | // SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2004, Psyent Corporation <www.psyent.com> * Scott McNutt <smcnutt@psyent.com> */ #include <config.h> #include <command.h> #include <cpu.h> #include <cpu_func.h> #include <dm.h> #include <errno.h> #include <event.h> #include <init.h> #include <irq_func.h> #include <asm/cache.h> #include <asm/global_data.h> #include <asm/system.h> DECLARE_GLOBAL_DATA_PTR; #ifdef CONFIG_DISPLAY_CPUINFO int print_cpuinfo(void) { printf("CPU: Nios-II\n"); return 0; } #endif /* CONFIG_DISPLAY_CPUINFO */ #ifdef CONFIG_ALTERA_SYSID int checkboard(void) { display_sysid(); return 0; } #endif void reset_cpu(void) { disable_interrupts(); /* indirect call to go beyond 256MB limitation of toolchain */ nios2_callr(gd->arch.reset_addr); } int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { reset_cpu(); return 0; } /* * COPY EXCEPTION TRAMPOLINE -- copy the tramp to the * exception address. Define CONFIG_ROM_STUBS to prevent * the copy (e.g. exception in flash or in other * softare/firmware component). */ #ifndef CONFIG_ROM_STUBS static void copy_exception_trampoline(void) { extern int _except_start, _except_end; void *except_target = (void *)gd->arch.exception_addr; if (&_except_start != except_target) { memcpy(except_target, &_except_start, &_except_end - &_except_start); flush_cache(gd->arch.exception_addr, &_except_end - &_except_start); } } #endif static int nios_cpu_setup(void) { struct udevice *dev; int ret; ret = uclass_first_device_err(UCLASS_CPU, &dev); if (ret) return ret; gd->ram_size = CFG_SYS_SDRAM_SIZE; #ifndef CONFIG_ROM_STUBS copy_exception_trampoline(); #endif return 0; } EVENT_SPY_SIMPLE(EVT_DM_POST_INIT_F, nios_cpu_setup); static int altera_nios2_get_desc(const struct udevice *dev, char *buf, int size) { const char *cpu_name = "Nios-II"; if (size < strlen(cpu_name)) return -ENOSPC; strcpy(buf, cpu_name); return 0; } static int altera_nios2_get_info(const struct udevice *dev, struct cpu_info *info) { info->cpu_freq = gd->cpu_clk; info->features = (1 << CPU_FEAT_L1_CACHE) | (gd->arch.has_mmu ? (1 << CPU_FEAT_MMU) : 0); return 0; } static int altera_nios2_get_count(const struct udevice *dev) { return 1; } static int altera_nios2_probe(struct udevice *dev) { const void *blob = gd->fdt_blob; int node = dev_of_offset(dev); gd->cpu_clk = fdtdec_get_int(blob, node, "clock-frequency", 0); gd->arch.dcache_line_size = fdtdec_get_int(blob, node, "dcache-line-size", 0); gd->arch.icache_line_size = fdtdec_get_int(blob, node, "icache-line-size", 0); gd->arch.dcache_size = fdtdec_get_int(blob, node, "dcache-size", 0); gd->arch.icache_size = fdtdec_get_int(blob, node, "icache-size", 0); gd->arch.reset_addr = fdtdec_get_int(blob, node, "altr,reset-addr", 0); gd->arch.exception_addr = fdtdec_get_int(blob, node, "altr,exception-addr", 0); gd->arch.has_initda = fdtdec_get_int(blob, node, "altr,has-initda", 0); gd->arch.has_mmu = fdtdec_get_int(blob, node, "altr,has-mmu", 0); gd->arch.io_region_base = gd->arch.has_mmu ? 0xe0000000 : 0x80000000; gd->arch.mem_region_base = gd->arch.has_mmu ? 0xc0000000 : 0x00000000; gd->arch.physaddr_mask = gd->arch.has_mmu ? 0x1fffffff : 0x7fffffff; return 0; } static const struct cpu_ops altera_nios2_ops = { .get_desc = altera_nios2_get_desc, .get_info = altera_nios2_get_info, .get_count = altera_nios2_get_count, }; static const struct udevice_id altera_nios2_ids[] = { { .compatible = "altr,nios2-1.0" }, { .compatible = "altr,nios2-1.1" }, { } }; U_BOOT_DRIVER(altera_nios2) = { .name = "altera_nios2", .id = UCLASS_CPU, .of_match = altera_nios2_ids, .probe = altera_nios2_probe, .ops = &altera_nios2_ops, .flags = DM_FLAG_PRE_RELOC, }; /* This is a dummy function on nios2 */ int dram_init(void) { return 0; } |