| /* |
| * 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; |
| phys_addr_t 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", |
| (u64)mem_start, (u64)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 |