2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
5 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/cache.h>
14 DECLARE_GLOBAL_DATA_PTR;
16 #ifdef CONFIG_DISPLAY_CPUINFO
17 int print_cpuinfo(void)
19 printf("CPU: Nios-II\n");
22 #endif /* CONFIG_DISPLAY_CPUINFO */
24 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
27 /* indirect call to go beyond 256MB limitation of toolchain */
28 nios2_callr(gd->arch.reset_addr);
32 int arch_cpu_init_dm(void)
37 ret = uclass_first_device(UCLASS_CPU, &dev);
43 gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
48 static int altera_nios2_get_desc(struct udevice *dev, char *buf, int size)
50 const char *cpu_name = "Nios-II";
52 if (size < strlen(cpu_name))
54 strcpy(buf, cpu_name);
59 static int altera_nios2_get_info(struct udevice *dev, struct cpu_info *info)
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);
68 static int altera_nios2_get_count(struct udevice *dev)
73 static int altera_nios2_probe(struct udevice *dev)
75 const void *blob = gd->fdt_blob;
76 int node = dev->of_offset;
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,
86 gd->arch.icache_size = fdtdec_get_int(blob, node,
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,
96 gd->arch.io_region_base = gd->arch.has_mmu ? 0xe0000000 : 0x8000000;
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,
107 static const struct udevice_id altera_nios2_ids[] = {
108 { .compatible = "altr,nios2-1.0" },
109 { .compatible = "altr,nios2-1.1" },
113 U_BOOT_DRIVER(altera_nios2) = {
114 .name = "altera_nios2",
116 .of_match = altera_nios2_ids,
117 .probe = altera_nios2_probe,
118 .ops = &altera_nios2_ops,
119 .flags = DM_FLAG_PRE_RELOC,