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48 lines
1.2 KiB
48 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* SMP support for Emma Mobile EV2 |
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* |
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* Copyright (C) 2012 Renesas Solutions Corp. |
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* Copyright (C) 2012 Magnus Damm |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/smp.h> |
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#include <linux/spinlock.h> |
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#include <linux/io.h> |
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#include <linux/delay.h> |
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#include <asm/smp_plat.h> |
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#include <asm/smp_scu.h> |
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#include "common.h" |
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#include "emev2.h" |
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#define EMEV2_SCU_BASE 0x1e000000 |
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#define EMEV2_SMU_BASE 0xe0110000 |
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#define SMU_GENERAL_REG0 0x7c0 |
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static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) |
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{ |
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arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); |
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return 0; |
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} |
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static void __init emev2_smp_prepare_cpus(unsigned int max_cpus) |
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{ |
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void __iomem *smu; |
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/* Tell ROM loader about our vector (in headsmp.S) */ |
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smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); |
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if (smu) { |
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iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); |
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iounmap(smu); |
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} |
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/* setup EMEV2 specific SCU bits */ |
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shmobile_smp_scu_prepare_cpus(EMEV2_SCU_BASE, max_cpus); |
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} |
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const struct smp_operations emev2_smp_ops __initconst = { |
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.smp_prepare_cpus = emev2_smp_prepare_cpus, |
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.smp_boot_secondary = emev2_boot_secondary, |
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};
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