diff options
Diffstat (limited to 'arch/arm/mach-keystone')
| -rw-r--r-- | arch/arm/mach-keystone/Kconfig | 16 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/Makefile | 10 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/keystone.c | 110 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/keystone.h | 24 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/memory.h | 24 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/platsmp.c | 44 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/pm_domain.c | 53 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/smc.S | 28 |
8 files changed, 309 insertions, 0 deletions
diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig new file mode 100644 index 000000000..db122356b --- /dev/null +++ b/arch/arm/mach-keystone/Kconfig @@ -0,0 +1,16 @@ +config ARCH_KEYSTONE + bool "Texas Instruments Keystone Devices" + depends on ARCH_MULTI_V7 + select ARM_GIC + select HAVE_ARM_ARCH_TIMER + select KEYSTONE_TIMER + select ARCH_HAS_RESET_CONTROLLER + select ARM_ERRATA_798181 if SMP + select COMMON_CLK_KEYSTONE + select ARCH_SUPPORTS_BIG_ENDIAN + select ZONE_DMA if ARM_LPAE + select PINCTRL + select PM_GENERIC_DOMAINS if PM + help + Support for boards based on the Texas Instruments Keystone family of + SoCs. diff --git a/arch/arm/mach-keystone/Makefile b/arch/arm/mach-keystone/Makefile new file mode 100644 index 000000000..f8b0dccac --- /dev/null +++ b/arch/arm/mach-keystone/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-y := keystone.o smc.o + +plus_sec := $(call as-instr,.arch_extension sec,+sec) +AFLAGS_smc.o :=-Wa,-march=armv7-a$(plus_sec) + +obj-$(CONFIG_SMP) += platsmp.o + +# PM domain driver for Keystone SOCs +obj-$(CONFIG_ARCH_KEYSTONE) += pm_domain.o diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c new file mode 100644 index 000000000..79ff5b953 --- /dev/null +++ b/arch/arm/mach-keystone/keystone.c @@ -0,0 +1,110 @@ +/* + * Keystone2 based boards and SOC related code. + * + * Copyright 2013 Texas Instruments, Inc. + * Cyril Chemparathy <cyril@ti.com> + * Santosh Shilimkar <santosh.shillimkar@ti.com> + * + * 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/io.h> +#include <linux/of.h> +#include <linux/init.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/memblock.h> + +#include <asm/setup.h> +#include <asm/mach/map.h> +#include <asm/mach/arch.h> +#include <asm/mach/time.h> +#include <asm/smp_plat.h> +#include <asm/memory.h> + +#include "memory.h" + +#include "keystone.h" + +static unsigned long keystone_dma_pfn_offset __read_mostly; + +static int keystone_platform_notifier(struct notifier_block *nb, + unsigned long event, void *data) +{ + struct device *dev = data; + + if (event != BUS_NOTIFY_ADD_DEVICE) + return NOTIFY_DONE; + + if (!dev) + return NOTIFY_BAD; + + if (!dev->of_node) { + dev->dma_pfn_offset = keystone_dma_pfn_offset; + dev_err(dev, "set dma_pfn_offset%08lx\n", + dev->dma_pfn_offset); + } + return NOTIFY_OK; +} + +static struct notifier_block platform_nb = { + .notifier_call = keystone_platform_notifier, +}; + +static void __init keystone_init(void) +{ + if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START) { + keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START - + KEYSTONE_LOW_PHYS_START); + bus_register_notifier(&platform_bus_type, &platform_nb); + } + keystone_pm_runtime_init(); +} + +static long long __init keystone_pv_fixup(void) +{ + long long offset; + u64 mem_start, mem_end; + + mem_start = memblock_start_of_DRAM(); + mem_end = memblock_end_of_DRAM(); + + /* nothing to do if we are running out of the <32-bit space */ + if (mem_start >= KEYSTONE_LOW_PHYS_START && + mem_end <= KEYSTONE_LOW_PHYS_END) + return 0; + + if (mem_start < KEYSTONE_HIGH_PHYS_START || + mem_end > KEYSTONE_HIGH_PHYS_END) { + pr_crit("Invalid address space for memory (%08llx-%08llx)\n", + mem_start, mem_end); + return 0; + } + + offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START; + + /* Populate the arch idmap hook */ + arch_phys_to_idmap_offset = -offset; + + return offset; +} + +static const char *const keystone_match[] __initconst = { + "ti,k2hk", + "ti,k2e", + "ti,k2l", + "ti,k2g", + "ti,keystone", + NULL, +}; + +DT_MACHINE_START(KEYSTONE, "Keystone") +#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE) + .dma_zone_size = SZ_2G, +#endif + .smp = smp_ops(keystone_smp_ops), + .init_machine = keystone_init, + .dt_compat = keystone_match, + .pv_fixup = keystone_pv_fixup, +MACHINE_END diff --git a/arch/arm/mach-keystone/keystone.h b/arch/arm/mach-keystone/keystone.h new file mode 100644 index 000000000..33eaa037a --- /dev/null +++ b/arch/arm/mach-keystone/keystone.h @@ -0,0 +1,24 @@ +/* + * Copyright 2013 Texas Instruments, Inc. + * Cyril Chemparathy <cyril@ti.com> + * Santosh Shilimkar <santosh.shillimkar@ti.com> + * + * 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. + */ + +#ifndef __KEYSTONE_H__ +#define __KEYSTONE_H__ + +#define KEYSTONE_MON_CPU_UP_IDX 0x00 + +#ifndef __ASSEMBLER__ + +extern const struct smp_operations keystone_smp_ops; +extern void secondary_startup(void); +extern u32 keystone_cpu_smc(u32 command, u32 cpu, u32 addr); +extern int keystone_pm_runtime_init(void); + +#endif /* __ASSEMBLER__ */ +#endif /* __KEYSTONE_H__ */ diff --git a/arch/arm/mach-keystone/memory.h b/arch/arm/mach-keystone/memory.h new file mode 100644 index 000000000..b854fb18e --- /dev/null +++ b/arch/arm/mach-keystone/memory.h @@ -0,0 +1,24 @@ +/* + * Copyright 2014 Texas Instruments, Inc. + * Santosh Shilimkar <santosh.shilimkar@ti.com> + * + * 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. + */ +#ifndef __MEMORY_H +#define __MEMORY_H + +#define MAX_PHYSMEM_BITS 36 +#define SECTION_SIZE_BITS 34 + +#define KEYSTONE_LOW_PHYS_START 0x80000000ULL +#define KEYSTONE_LOW_PHYS_SIZE 0x80000000ULL /* 2G */ +#define KEYSTONE_LOW_PHYS_END (KEYSTONE_LOW_PHYS_START + \ + KEYSTONE_LOW_PHYS_SIZE - 1) + +#define KEYSTONE_HIGH_PHYS_START 0x800000000ULL +#define KEYSTONE_HIGH_PHYS_SIZE 0x400000000ULL /* 16G */ +#define KEYSTONE_HIGH_PHYS_END (KEYSTONE_HIGH_PHYS_START + \ + KEYSTONE_HIGH_PHYS_SIZE - 1) +#endif /* __MEMORY_H */ diff --git a/arch/arm/mach-keystone/platsmp.c b/arch/arm/mach-keystone/platsmp.c new file mode 100644 index 000000000..566527697 --- /dev/null +++ b/arch/arm/mach-keystone/platsmp.c @@ -0,0 +1,44 @@ +/* + * Keystone SOC SMP platform code + * + * Copyright 2013 Texas Instruments, Inc. + * Cyril Chemparathy <cyril@ti.com> + * Santosh Shilimkar <santosh.shillimkar@ti.com> + * + * Based on 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/init.h> +#include <linux/smp.h> +#include <linux/io.h> + +#include <asm/smp_plat.h> +#include <asm/prom.h> +#include <asm/tlbflush.h> +#include <asm/pgtable.h> + +#include "keystone.h" + +static int keystone_smp_boot_secondary(unsigned int cpu, + struct task_struct *idle) +{ + unsigned long start = virt_to_idmap(&secondary_startup); + int error; + + pr_debug("keystone-smp: booting cpu %d, vector %08lx\n", + cpu, start); + + error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start); + if (error) + pr_err("CPU %d bringup failed with %d\n", cpu, error); + + return error; +} + +const struct smp_operations keystone_smp_ops __initconst = { + .smp_boot_secondary = keystone_smp_boot_secondary, +}; diff --git a/arch/arm/mach-keystone/pm_domain.c b/arch/arm/mach-keystone/pm_domain.c new file mode 100644 index 000000000..abca83d22 --- /dev/null +++ b/arch/arm/mach-keystone/pm_domain.c @@ -0,0 +1,53 @@ +/* + * PM domain driver for Keystone2 devices + * + * Copyright 2013 Texas Instruments, Inc. + * Santosh Shilimkar <santosh.shillimkar@ti.com> + * + * Based on Kevins work on DAVINCI SOCs + * Kevin Hilman <khilman@linaro.org> + * + * 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/init.h> +#include <linux/pm_runtime.h> +#include <linux/pm_clock.h> +#include <linux/platform_device.h> +#include <linux/of.h> + +#include "keystone.h" + +static struct dev_pm_domain keystone_pm_domain = { + .ops = { + USE_PM_CLK_RUNTIME_OPS + USE_PLATFORM_PM_SLEEP_OPS + }, +}; + +static struct pm_clk_notifier_block platform_domain_notifier = { + .pm_domain = &keystone_pm_domain, + .con_ids = { NULL }, +}; + +static const struct of_device_id of_keystone_table[] = { + {.compatible = "ti,k2hk"}, + {.compatible = "ti,k2e"}, + {.compatible = "ti,k2l"}, + { /* end of list */ }, +}; + +int __init keystone_pm_runtime_init(void) +{ + struct device_node *np; + + np = of_find_matching_node(NULL, of_keystone_table); + if (!np) + return 0; + + pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier); + + return 0; +} diff --git a/arch/arm/mach-keystone/smc.S b/arch/arm/mach-keystone/smc.S new file mode 100644 index 000000000..d15de8179 --- /dev/null +++ b/arch/arm/mach-keystone/smc.S @@ -0,0 +1,28 @@ +/* + * Keystone Secure APIs + * + * Copyright (C) 2013 Texas Instruments, Inc. + * Santosh Shilimkar <santosh.shilimkar@ti.com> + * + * 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/linkage.h> + +/** + * u32 keystone_cpu_smc(u32 command, u32 cpu, u32 addr) + * + * Low level CPU monitor API + * @command: Monitor command. + * @cpu: CPU Number + * @addr: Kernel jump address for boot CPU + * + * Return: Non zero value on failure + */ +ENTRY(keystone_cpu_smc) + stmfd sp!, {r4-r11, lr} + smc #0 + ldmfd sp!, {r4-r11, pc} +ENDPROC(keystone_cpu_smc) |