1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (C) Copyright 2018 4 * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc 5 */ 6 7#include <common.h> 8#include <dm.h> 9#include <cpu.h> 10 11static int cpu_sandbox_get_desc(const struct udevice *dev, char *buf, int size) 12{ 13 snprintf(buf, size, "LEG Inc. SuperMegaUltraTurbo CPU No. 1"); 14 15 return 0; 16} 17 18static int cpu_sandbox_get_info(const struct udevice *dev, 19 struct cpu_info *info) 20{ 21 info->cpu_freq = 42 * 42 * 42 * 42 * 42; 22 info->features = 0x42424242; 23 info->address_width = IS_ENABLED(CONFIG_PHYS_64BIT) ? 64 : 32; 24 25 return 0; 26} 27 28static int cpu_sandbox_get_count(const struct udevice *dev) 29{ 30 return 42; 31} 32 33static int cpu_sandbox_get_vendor(const struct udevice *dev, char *buf, 34 int size) 35{ 36 snprintf(buf, size, "Languid Example Garbage Inc."); 37 38 return 0; 39} 40 41static const char *cpu_current = "cpu@1"; 42 43void cpu_sandbox_set_current(const char *name) 44{ 45 cpu_current = name; 46} 47 48static int cpu_sandbox_is_current(struct udevice *dev) 49{ 50 if (!strcmp(dev->name, cpu_current)) 51 return 1; 52 53 return 0; 54} 55 56static const struct cpu_ops cpu_sandbox_ops = { 57 .get_desc = cpu_sandbox_get_desc, 58 .get_info = cpu_sandbox_get_info, 59 .get_count = cpu_sandbox_get_count, 60 .get_vendor = cpu_sandbox_get_vendor, 61 .is_current = cpu_sandbox_is_current, 62}; 63 64static int cpu_sandbox_bind(struct udevice *dev) 65{ 66 int ret; 67 struct cpu_plat *plat = dev_get_parent_plat(dev); 68 69 /* first examine the property in current cpu node */ 70 ret = dev_read_u32(dev, "timebase-frequency", &plat->timebase_freq); 71 /* if not found, then look at the parent /cpus node */ 72 if (ret) 73 ret = dev_read_u32(dev->parent, "timebase-frequency", 74 &plat->timebase_freq); 75 76 return ret; 77} 78 79static int cpu_sandbox_probe(struct udevice *dev) 80{ 81 return 0; 82} 83 84static const struct udevice_id cpu_sandbox_ids[] = { 85 { .compatible = "sandbox,cpu_sandbox" }, 86 { } 87}; 88 89U_BOOT_DRIVER(cpu_sandbox) = { 90 .name = "cpu_sandbox", 91 .id = UCLASS_CPU, 92 .ops = &cpu_sandbox_ops, 93 .of_match = cpu_sandbox_ids, 94 .bind = cpu_sandbox_bind, 95 .probe = cpu_sandbox_probe, 96}; 97