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The cpu nodes in arch/sandbox/dts/test.dts should conform to the devicetree specification: * property device_type must be set to "cpu" * the reg property must be provided * the cpu nodes must have an address Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
96 lines
2 KiB
C
96 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2018
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* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
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*/
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#include <common.h>
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#include <dm.h>
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#include <cpu.h>
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static int cpu_sandbox_get_desc(const struct udevice *dev, char *buf, int size)
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{
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snprintf(buf, size, "LEG Inc. SuperMegaUltraTurbo CPU No. 1");
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return 0;
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}
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static int cpu_sandbox_get_info(const struct udevice *dev,
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struct cpu_info *info)
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{
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info->cpu_freq = 42 * 42 * 42 * 42 * 42;
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info->features = 0x42424242;
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info->address_width = IS_ENABLED(CONFIG_PHYS_64BIT) ? 64 : 32;
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return 0;
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}
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static int cpu_sandbox_get_count(const struct udevice *dev)
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{
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return 42;
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}
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static int cpu_sandbox_get_vendor(const struct udevice *dev, char *buf,
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int size)
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{
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snprintf(buf, size, "Languid Example Garbage Inc.");
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return 0;
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}
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static const char *cpu_current = "cpu@1";
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void cpu_sandbox_set_current(const char *name)
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{
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cpu_current = name;
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}
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static int cpu_sandbox_is_current(struct udevice *dev)
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{
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if (!strcmp(dev->name, cpu_current))
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return 1;
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return 0;
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}
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static const struct cpu_ops cpu_sandbox_ops = {
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.get_desc = cpu_sandbox_get_desc,
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.get_info = cpu_sandbox_get_info,
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.get_count = cpu_sandbox_get_count,
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.get_vendor = cpu_sandbox_get_vendor,
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.is_current = cpu_sandbox_is_current,
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};
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static int cpu_sandbox_bind(struct udevice *dev)
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{
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int ret;
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struct cpu_plat *plat = dev_get_parent_plat(dev);
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/* first examine the property in current cpu node */
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ret = dev_read_u32(dev, "timebase-frequency", &plat->timebase_freq);
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/* if not found, then look at the parent /cpus node */
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if (ret)
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ret = dev_read_u32(dev->parent, "timebase-frequency",
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&plat->timebase_freq);
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return ret;
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}
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static int cpu_sandbox_probe(struct udevice *dev)
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{
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return 0;
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}
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static const struct udevice_id cpu_sandbox_ids[] = {
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{ .compatible = "sandbox,cpu_sandbox" },
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{ }
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};
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U_BOOT_DRIVER(cpu_sandbox) = {
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.name = "cpu_sandbox",
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.id = UCLASS_CPU,
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.ops = &cpu_sandbox_ops,
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.of_match = cpu_sandbox_ids,
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.bind = cpu_sandbox_bind,
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.probe = cpu_sandbox_probe,
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};
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