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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | // SPDX-License-Identifier: GPL-2.0-only /* * Keystone2 based boards and SOC related code. * * Copyright 2013 Texas Instruments, Inc. * Cyril Chemparathy <cyril@ti.com> * Santosh Shilimkar <santosh.shillimkar@ti.com> */ #include <linux/io.h> #include <linux/of.h> #include <linux/dma-map-ops.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" #ifdef CONFIG_ARM_LPAE 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) { int ret = dma_direct_set_offset(dev, KEYSTONE_HIGH_PHYS_START, KEYSTONE_LOW_PHYS_START, KEYSTONE_HIGH_PHYS_SIZE); dev_err(dev, "set dma_offset%08llx%s\n", KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START, ret ? " failed" : ""); } return NOTIFY_OK; } static struct notifier_block platform_nb = { .notifier_call = keystone_platform_notifier, }; #endif /* CONFIG_ARM_LPAE */ static void __init keystone_init(void) { #ifdef CONFIG_ARM_LPAE if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START) bus_register_notifier(&platform_bus_type, &platform_nb); #endif 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 |