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https://github.com/edk2-porting/linux-next.git
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389ee0c2ff
Since some new Hisilicon SoCs are not named as hi3xxx, rename mach-hi3xxx to mach-hisi instead. And the pronounciation of "hisi" is similar to the chinese pronounciation of Hisilicon. So Hisilicon guys like this name. ARCH_HI3xxx will be renamed later since other drivers are using it and they are still in linux-next git tree. So rename ARCH_HI3xxx later. Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com> Signed-off-by: Kevin Hilman <khilman@linaro.org>
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/*
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* Copyright (c) 2013 Linaro Ltd.
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* Copyright (c) 2013 Hisilicon Limited.
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* Based on arch/arm/mach-vexpress/platsmp.c, Copyright (C) 2002 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*/
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#include <linux/smp.h>
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#include <linux/io.h>
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#include <linux/of_address.h>
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#include <asm/cacheflush.h>
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#include <asm/smp_plat.h>
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#include <asm/smp_scu.h>
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#include "core.h"
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static void __iomem *ctrl_base;
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void hi3xxx_set_cpu_jump(int cpu, void *jump_addr)
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{
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cpu = cpu_logical_map(cpu);
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if (!cpu || !ctrl_base)
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return;
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writel_relaxed(virt_to_phys(jump_addr), ctrl_base + ((cpu - 1) << 2));
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}
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int hi3xxx_get_cpu_jump(int cpu)
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{
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cpu = cpu_logical_map(cpu);
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if (!cpu || !ctrl_base)
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return 0;
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return readl_relaxed(ctrl_base + ((cpu - 1) << 2));
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}
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static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus)
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{
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struct device_node *np = NULL;
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unsigned long base = 0;
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u32 offset = 0;
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void __iomem *scu_base = NULL;
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if (scu_a9_has_base()) {
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base = scu_a9_get_base();
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scu_base = ioremap(base, SZ_4K);
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if (!scu_base) {
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pr_err("ioremap(scu_base) failed\n");
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return;
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}
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scu_enable(scu_base);
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iounmap(scu_base);
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}
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if (!ctrl_base) {
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np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
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if (!np) {
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pr_err("failed to find hisilicon,sysctrl node\n");
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return;
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}
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ctrl_base = of_iomap(np, 0);
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if (!ctrl_base) {
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pr_err("failed to map address\n");
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return;
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}
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if (of_property_read_u32(np, "smp-offset", &offset) < 0) {
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pr_err("failed to find smp-offset property\n");
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return;
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}
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ctrl_base += offset;
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}
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}
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static int hi3xxx_boot_secondary(unsigned int cpu, struct task_struct *idle)
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{
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hi3xxx_set_cpu(cpu, true);
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hi3xxx_set_cpu_jump(cpu, secondary_startup);
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arch_send_wakeup_ipi_mask(cpumask_of(cpu));
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return 0;
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}
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struct smp_operations hi3xxx_smp_ops __initdata = {
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.smp_prepare_cpus = hi3xxx_smp_prepare_cpus,
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.smp_boot_secondary = hi3xxx_boot_secondary,
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#ifdef CONFIG_HOTPLUG_CPU
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.cpu_die = hi3xxx_cpu_die,
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.cpu_kill = hi3xxx_cpu_kill,
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#endif
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};
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