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https://github.com/brain-hackers/u-boot-brain
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6e6f4ce4f8
Most of the MP initialization codes in arch/x86/cpu/baytrail/cpu.c is common to all x86 processors, except detect_num_cpus() which varies from cpu to cpu. Move these to arch/x86/cpu/cpu.c and implement the new 'get_count' method for baytrail and cpu_x86 drivers. Now we call cpu_get_count() in mp_init() to get the number of CPUs. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
77 lines
1.4 KiB
C
77 lines
1.4 KiB
C
/*
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* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <cpu.h>
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#include <dm.h>
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#include <errno.h>
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#include <asm/cpu.h>
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DECLARE_GLOBAL_DATA_PTR;
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int cpu_x86_bind(struct udevice *dev)
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{
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struct cpu_platdata *plat = dev_get_parent_platdata(dev);
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plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
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"intel,apic-id", -1);
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return 0;
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}
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int cpu_x86_get_desc(struct udevice *dev, char *buf, int size)
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{
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if (size < CPU_MAX_NAME_LEN)
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return -ENOSPC;
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cpu_get_name(buf);
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return 0;
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}
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static int cpu_x86_get_count(struct udevice *dev)
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{
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int node, cpu;
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int num = 0;
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node = fdt_path_offset(gd->fdt_blob, "/cpus");
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if (node < 0)
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return -ENOENT;
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for (cpu = fdt_first_subnode(gd->fdt_blob, node);
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cpu >= 0;
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cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
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const char *device_type;
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device_type = fdt_getprop(gd->fdt_blob, cpu,
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"device_type", NULL);
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if (!device_type)
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continue;
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if (strcmp(device_type, "cpu") == 0)
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num++;
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}
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return num;
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}
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static const struct cpu_ops cpu_x86_ops = {
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.get_desc = cpu_x86_get_desc,
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.get_count = cpu_x86_get_count,
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};
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static const struct udevice_id cpu_x86_ids[] = {
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{ .compatible = "cpu-x86" },
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{ }
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};
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U_BOOT_DRIVER(cpu_x86_drv) = {
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.name = "cpu_x86",
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.id = UCLASS_CPU,
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.of_match = cpu_x86_ids,
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.bind = cpu_x86_bind,
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.ops = &cpu_x86_ops,
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};
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