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61 lines
1.4 KiB
61 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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// Copyright (C) ASPEED Technology Inc. |
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// Copyright IBM Corp. |
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#include <linux/of_address.h> |
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#include <linux/io.h> |
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#include <linux/of.h> |
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#include <linux/smp.h> |
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#define BOOT_ADDR 0x00 |
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#define BOOT_SIG 0x04 |
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static struct device_node *secboot_node; |
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static int aspeed_g6_boot_secondary(unsigned int cpu, struct task_struct *idle) |
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{ |
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void __iomem *base; |
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base = of_iomap(secboot_node, 0); |
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if (!base) { |
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pr_err("could not map the secondary boot base!"); |
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return -ENODEV; |
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} |
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writel_relaxed(0, base + BOOT_ADDR); |
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writel_relaxed(__pa_symbol(secondary_startup_arm), base + BOOT_ADDR); |
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writel_relaxed((0xABBAAB00 | (cpu & 0xff)), base + BOOT_SIG); |
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dsb_sev(); |
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iounmap(base); |
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return 0; |
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} |
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static void __init aspeed_g6_smp_prepare_cpus(unsigned int max_cpus) |
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{ |
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void __iomem *base; |
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secboot_node = of_find_compatible_node(NULL, NULL, "aspeed,ast2600-smpmem"); |
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if (!secboot_node) { |
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pr_err("secboot device node found!!\n"); |
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return; |
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} |
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base = of_iomap(secboot_node, 0); |
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if (!base) { |
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pr_err("could not map the secondary boot base!"); |
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return; |
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} |
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__raw_writel(0xBADABABA, base + BOOT_SIG); |
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iounmap(base); |
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} |
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static const struct smp_operations aspeed_smp_ops __initconst = { |
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.smp_prepare_cpus = aspeed_g6_smp_prepare_cpus, |
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.smp_boot_secondary = aspeed_g6_boot_secondary, |
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}; |
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CPU_METHOD_OF_DECLARE(aspeed_smp, "aspeed,ast2600-smp", &aspeed_smp_ops);
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