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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 99 100 101 102 103 104 105 106 107 108 109 110 111 | /* * MIPS support for CONFIG_OF device tree support * * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.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/init.h> #include <linux/module.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/bootmem.h> #include <linux/initrd.h> #include <linux/debugfs.h> #include <linux/of.h> #include <linux/of_fdt.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <asm/page.h> #include <asm/prom.h> int __init early_init_dt_scan_memory_arch(unsigned long node, const char *uname, int depth, void *data) { return early_init_dt_scan_memory(node, uname, depth, data); } void __init early_init_dt_add_memory_arch(u64 base, u64 size) { return add_memory_region(base, size, BOOT_MEM_RAM); } int __init reserve_mem_mach(unsigned long addr, unsigned long size) { return reserve_bootmem(addr, size, BOOTMEM_DEFAULT); } void __init free_mem_mach(unsigned long addr, unsigned long size) { return free_bootmem(addr, size); } void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) { return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS)); } #ifdef CONFIG_BLK_DEV_INITRD void __init early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end) { initrd_start = (unsigned long)__va(start); initrd_end = (unsigned long)__va(end); initrd_below_start_ok = 1; } #endif /* * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq# * * Currently the mapping mechanism is trivial; simple flat hwirq numbers are * mapped 1:1 onto Linux irq numbers. Cascaded irq controllers are not * supported. */ unsigned int irq_create_of_mapping(struct device_node *controller, const u32 *intspec, unsigned int intsize) { return intspec[0]; } EXPORT_SYMBOL_GPL(irq_create_of_mapping); void __init early_init_devtree(void *params) { /* Setup flat device-tree pointer */ initial_boot_params = params; /* Retrieve various informations from the /chosen node of the * device-tree, including the platform type, initrd location and * size, and more ... */ of_scan_flat_dt(early_init_dt_scan_chosen, arcs_cmdline); /* Scan memory nodes */ of_scan_flat_dt(early_init_dt_scan_root, NULL); of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL); } void __init device_tree_init(void) { unsigned long base, size; if (!initial_boot_params) return; base = virt_to_phys((void *)initial_boot_params); size = be32_to_cpu(initial_boot_params->totalsize); /* Before we do anything, lets reserve the dt blob */ reserve_mem_mach(base, size); unflatten_device_tree(); /* free the space reserved for the dt blob */ free_mem_mach(base, size); } |