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/*
* Copyright (c) 2013 Linaro Ltd.
* Copyright (c) 2013 Hisilicon Limited.
* Based on arch/arm/mach-vexpress/platsmp.c, Copyright (C) 2002 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*/
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/delay.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include <asm/mach/map.h>
#include "core.h"
#define HIX5HD2_BOOT_ADDRESS 0xffff0000
static void __iomem *ctrl_base;
void hi3xxx_set_cpu_jump(int cpu, void *jump_addr)
{
cpu = cpu_logical_map(cpu);
if (!cpu || !ctrl_base)
return;
writel_relaxed(__pa_symbol(jump_addr), ctrl_base + ((cpu - 1) << 2));
}
int hi3xxx_get_cpu_jump(int cpu)
{
cpu = cpu_logical_map(cpu);
if (!cpu || !ctrl_base)
return 0;
return readl_relaxed(ctrl_base + ((cpu - 1) << 2));
}
static void __init hisi_enable_scu_a9(void)
{
unsigned long base = 0;
void __iomem *scu_base = NULL;
if (scu_a9_has_base()) {
base = scu_a9_get_base();
scu_base = ioremap(base, SZ_4K);
if (!scu_base) {
pr_err("ioremap(scu_base) failed\n");
return;
}
scu_enable(scu_base);
iounmap(scu_base);
}
}
static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus)
{
struct device_node *np = NULL;
u32 offset = 0;
hisi_enable_scu_a9();
if (!ctrl_base) {
np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
if (!np) {
pr_err("failed to find hisilicon,sysctrl node\n");
return;
}
ctrl_base = of_iomap(np, 0);
if (!ctrl_base) {
pr_err("failed to map address\n");
return;
}
if (of_property_read_u32(np, "smp-offset", &offset) < 0) {
pr_err("failed to find smp-offset property\n");
return;
}
ctrl_base += offset;
}
}
static int hi3xxx_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
hi3xxx_set_cpu(cpu, true);
hi3xxx_set_cpu_jump(cpu, secondary_startup);
arch_send_wakeup_ipi_mask(cpumask_of(cpu));
return 0;
}
static const struct smp_operations hi3xxx_smp_ops __initconst = {
.smp_prepare_cpus = hi3xxx_smp_prepare_cpus,
.smp_boot_secondary = hi3xxx_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = hi3xxx_cpu_die,
.cpu_kill = hi3xxx_cpu_kill,
#endif
};
static void __init hisi_common_smp_prepare_cpus(unsigned int max_cpus)
{
hisi_enable_scu_a9();
}
static void hix5hd2_set_scu_boot_addr(phys_addr_t start_addr, phys_addr_t jump_addr)
{
void __iomem *virt;
virt = ioremap(start_addr, PAGE_SIZE);
writel_relaxed(0xe51ff004, virt); /* ldr pc, [rc, #-4] */
writel_relaxed(jump_addr, virt + 4); /* pc jump phy address */
iounmap(virt);
}
static int hix5hd2_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
phys_addr_t jumpaddr;
jumpaddr = __pa_symbol(secondary_startup);
hix5hd2_set_scu_boot_addr(HIX5HD2_BOOT_ADDRESS, jumpaddr);
hix5hd2_set_cpu(cpu, true);
arch_send_wakeup_ipi_mask(cpumask_of(cpu));
return 0;
}
static const struct smp_operations hix5hd2_smp_ops __initconst = {
.smp_prepare_cpus = hisi_common_smp_prepare_cpus,
.smp_boot_secondary = hix5hd2_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = hix5hd2_cpu_die,
#endif
};
#define SC_SCTL_REMAP_CLR 0x00000100
#define HIP01_BOOT_ADDRESS 0x80000000
#define REG_SC_CTRL 0x000
static void hip01_set_boot_addr(phys_addr_t start_addr, phys_addr_t jump_addr)
{
void __iomem *virt;
virt = phys_to_virt(start_addr);
writel_relaxed(0xe51ff004, virt);
writel_relaxed(jump_addr, virt + 4);
}
static int hip01_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
phys_addr_t jumpaddr;
unsigned int remap_reg_value = 0;
struct device_node *node;
jumpaddr = __pa_symbol(secondary_startup);
hip01_set_boot_addr(HIP01_BOOT_ADDRESS, jumpaddr);
node = of_find_compatible_node(NULL, NULL, "hisilicon,hip01-sysctrl");
if (WARN_ON(!node))
return -1;
ctrl_base = of_iomap(node, 0);
/* set the secondary core boot from DDR */
remap_reg_value = readl_relaxed(ctrl_base + REG_SC_CTRL);
barrier();
remap_reg_value |= SC_SCTL_REMAP_CLR;
barrier();
writel_relaxed(remap_reg_value, ctrl_base + REG_SC_CTRL);
hip01_set_cpu(cpu, true);
return 0;
}
static const struct smp_operations hip01_smp_ops __initconst = {
.smp_prepare_cpus = hisi_common_smp_prepare_cpus,
.smp_boot_secondary = hip01_boot_secondary,
};
CPU_METHOD_OF_DECLARE(hi3xxx_smp, "hisilicon,hi3620-smp", &hi3xxx_smp_ops);
CPU_METHOD_OF_DECLARE(hix5hd2_smp, "hisilicon,hix5hd2-smp", &hix5hd2_smp_ops);
CPU_METHOD_OF_DECLARE(hip01_smp, "hisilicon,hip01-smp", &hip01_smp_ops);
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