109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Keystone2 based boards and SOC related code.
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*
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* Copyright 2013 Texas Instruments, Inc.
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* Cyril Chemparathy <cyril@ti.com>
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* Santosh Shilimkar <santosh.shillimkar@ti.com>
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*/
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/dma-map-ops.h>
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#include <linux/init.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <linux/memblock.h>
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#include <asm/setup.h>
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#include <asm/mach/map.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#include <asm/memory.h>
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#include "memory.h"
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#include "keystone.h"
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#ifdef CONFIG_ARM_LPAE
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static int keystone_platform_notifier(struct notifier_block *nb,
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unsigned long event, void *data)
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{
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struct device *dev = data;
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if (event != BUS_NOTIFY_ADD_DEVICE)
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return NOTIFY_DONE;
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if (!dev)
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return NOTIFY_BAD;
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if (!dev->of_node) {
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int ret = dma_direct_set_offset(dev, KEYSTONE_HIGH_PHYS_START,
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KEYSTONE_LOW_PHYS_START,
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KEYSTONE_HIGH_PHYS_SIZE);
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dev_err(dev, "set dma_offset%08llx%s\n",
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KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START,
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ret ? " failed" : "");
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}
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return NOTIFY_OK;
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}
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static struct notifier_block platform_nb = {
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.notifier_call = keystone_platform_notifier,
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};
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#endif /* CONFIG_ARM_LPAE */
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static void __init keystone_init(void)
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{
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#ifdef CONFIG_ARM_LPAE
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if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START)
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bus_register_notifier(&platform_bus_type, &platform_nb);
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#endif
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keystone_pm_runtime_init();
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}
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static long long __init keystone_pv_fixup(void)
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{
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long long offset;
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u64 mem_start, mem_end;
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mem_start = memblock_start_of_DRAM();
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mem_end = memblock_end_of_DRAM();
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/* nothing to do if we are running out of the <32-bit space */
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if (mem_start >= KEYSTONE_LOW_PHYS_START &&
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mem_end <= KEYSTONE_LOW_PHYS_END)
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return 0;
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if (mem_start < KEYSTONE_HIGH_PHYS_START ||
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mem_end > KEYSTONE_HIGH_PHYS_END) {
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pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
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mem_start, mem_end);
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return 0;
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}
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offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;
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/* Populate the arch idmap hook */
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arch_phys_to_idmap_offset = -offset;
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return offset;
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}
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static const char *const keystone_match[] __initconst = {
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"ti,k2hk",
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"ti,k2e",
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"ti,k2l",
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"ti,k2g",
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"ti,keystone",
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NULL,
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};
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DT_MACHINE_START(KEYSTONE, "Keystone")
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#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
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.dma_zone_size = SZ_2G,
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#endif
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.init_machine = keystone_init,
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.dt_compat = keystone_match,
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.pv_fixup = keystone_pv_fixup,
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MACHINE_END
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