Commit 1d22924e authored by Anders Berg's avatar Anders Berg Committed by Arnd Bergmann

ARM: Add platform support for LSI AXM55xx SoC

The AXM55xx family consists of devices that may contain up to 16 ARM Cortex-A15
cores (in a 4x4 cluster configuration). The cores within each cluster share an
L2 cache, and the clusters are connected to each other via a CCN-504 cache
coherent interconnect.

This machine requires CONFIG_ARM_LPAE enabled as all peripherals are located
above 4GB in the memory map.
Signed-off-by: default avatarAnders Berg <anders.berg@lsi.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent a798c10f
Axxia AXM55xx device tree bindings
Boards using the AXM55xx SoC need to have the following properties:
Required root node property:
- compatible = "lsi,axm5516"
Boards:
LSI AXM5516 Validation board (Amarillo)
compatible = "lsi,axm5516-amarillo", "lsi,axm5516"
......@@ -950,6 +950,8 @@ source "arch/arm/mach-mvebu/Kconfig"
source "arch/arm/mach-at91/Kconfig"
source "arch/arm/mach-axxia/Kconfig"
source "arch/arm/mach-bcm/Kconfig"
source "arch/arm/mach-berlin/Kconfig"
......
......@@ -138,10 +138,12 @@ endif
textofs-$(CONFIG_ARCH_MSM7X30) := 0x00208000
textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
# Machine directory name. This list is sorted alphanumerically
# by CONFIG_* macro name.
machine-$(CONFIG_ARCH_AT91) += at91
machine-$(CONFIG_ARCH_AXXIA) += axxia
machine-$(CONFIG_ARCH_BCM) += bcm
machine-$(CONFIG_ARCH_BERLIN) += berlin
machine-$(CONFIG_ARCH_CLPS711X) += clps711x
......
config ARCH_AXXIA
bool "LSI Axxia platforms" if (ARCH_MULTI_V7 && ARM_LPAE)
select ARCH_DMA_ADDR_T_64BIT
select ARM_AMBA
select ARM_GIC
select ARM_TIMER_SP804
select HAVE_ARM_ARCH_TIMER
select MFD_SYSCON
select MIGHT_HAVE_PCI
select PCI_DOMAINS if PCI
select ZONE_DMA
help
This enables support for the LSI Axxia devices.
The LSI Axxia platforms require a Flattened Device Tree to be passed
to the kernel.
obj-y += axxia.o
obj-$(CONFIG_SMP) += platsmp.o
/*
* Support for the LSI Axxia SoC devices based on ARM cores.
*
* Copyright (C) 2012 LSI
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/init.h>
#include <asm/mach/arch.h>
static const char *axxia_dt_match[] __initconst = {
"lsi,axm5516",
"lsi,axm5516-sim",
"lsi,axm5516-emu",
NULL
};
DT_MACHINE_START(AXXIA_DT, "LSI Axxia AXM55XX")
.dt_compat = axxia_dt_match,
MACHINE_END
/*
* linux/arch/arm/mach-axxia/platsmp.c
*
* Copyright (C) 2012 LSI Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/smp.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/cacheflush.h>
/* Syscon register offsets for releasing cores from reset */
#define SC_CRIT_WRITE_KEY 0x1000
#define SC_RST_CPU_HOLD 0x1010
/*
* Write the kernel entry point for secondary CPUs to the specified address
*/
static void write_release_addr(u32 release_phys)
{
u32 *virt = (u32 *) phys_to_virt(release_phys);
writel_relaxed(virt_to_phys(secondary_startup), virt);
/* Make sure this store is visible to other CPUs */
smp_wmb();
__cpuc_flush_dcache_area(virt, sizeof(u32));
}
static int axxia_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
struct device_node *syscon_np;
void __iomem *syscon;
u32 tmp;
syscon_np = of_find_compatible_node(NULL, NULL, "lsi,axxia-syscon");
if (!syscon_np)
return -ENOENT;
syscon = of_iomap(syscon_np, 0);
if (!syscon)
return -ENOMEM;
tmp = readl(syscon + SC_RST_CPU_HOLD);
writel(0xab, syscon + SC_CRIT_WRITE_KEY);
tmp &= ~(1 << cpu);
writel(tmp, syscon + SC_RST_CPU_HOLD);
return 0;
}
static void __init axxia_smp_prepare_cpus(unsigned int max_cpus)
{
int cpu_count = 0;
int cpu;
/*
* Initialise the present map, which describes the set of CPUs actually
* populated at the present time.
*/
for_each_possible_cpu(cpu) {
struct device_node *np;
u32 release_phys;
np = of_get_cpu_node(cpu, NULL);
if (!np)
continue;
if (of_property_read_u32(np, "cpu-release-addr", &release_phys))
continue;
if (cpu_count < max_cpus) {
set_cpu_present(cpu, true);
cpu_count++;
}
if (release_phys != 0)
write_release_addr(release_phys);
}
}
static struct smp_operations axxia_smp_ops __initdata = {
.smp_prepare_cpus = axxia_smp_prepare_cpus,
.smp_boot_secondary = axxia_boot_secondary,
};
CPU_METHOD_OF_DECLARE(axxia_smp, "lsi,syscon-release", &axxia_smp_ops);
/*
* Copyright (c) 2014 LSI Corporation
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*/
#ifndef _DT_BINDINGS_CLK_AXM5516_H
#define _DT_BINDINGS_CLK_AXM5516_H
#define AXXIA_CLK_FAB_PLL 0
#define AXXIA_CLK_CPU_PLL 1
#define AXXIA_CLK_SYS_PLL 2
#define AXXIA_CLK_SM0_PLL 3
#define AXXIA_CLK_SM1_PLL 4
#define AXXIA_CLK_FAB_DIV 5
#define AXXIA_CLK_SYS_DIV 6
#define AXXIA_CLK_NRCP_DIV 7
#define AXXIA_CLK_CPU0_DIV 8
#define AXXIA_CLK_CPU1_DIV 9
#define AXXIA_CLK_CPU2_DIV 10
#define AXXIA_CLK_CPU3_DIV 11
#define AXXIA_CLK_PER_DIV 12
#define AXXIA_CLK_MMC_DIV 13
#define AXXIA_CLK_FAB 14
#define AXXIA_CLK_SYS 15
#define AXXIA_CLK_NRCP 16
#define AXXIA_CLK_CPU0 17
#define AXXIA_CLK_CPU1 18
#define AXXIA_CLK_CPU2 19
#define AXXIA_CLK_CPU3 20
#define AXXIA_CLK_PER 21
#define AXXIA_CLK_MMC 22
#endif
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