arch/x86/kernel/devicetree.c

   1 /*
   2  * Architecture specific OF callbacks.
   3  */
   4 #include <linux/bootmem.h>
   5 #include <linux/io.h>
   6 #include <linux/list.h>
   7 #include <linux/of.h>
   8 #include <linux/of_fdt.h>
   9 #include <linux/of_platform.h>
  10 #include <linux/slab.h>
  11
  12 char __initdata cmd_line[COMMAND_LINE_SIZE];
  13
  14 unsigned int irq_create_of_mapping(struct device_node *controller,
  15                                    const u32 *intspec, unsigned int intsize)
  16 {
  17         return intspec[0];
  18
  19 }
  20 EXPORT_SYMBOL_GPL(irq_create_of_mapping);
  21
  22 unsigned long pci_address_to_pio(phys_addr_t address)
  23 {
  24         /*
  25          * The ioport address can be directly used by inX / outX
  26          */
  27         BUG_ON(address >= (1 << 16));
  28         return (unsigned long)address;
  29 }
  30 EXPORT_SYMBOL_GPL(pci_address_to_pio);
  31
  32 void __init early_init_dt_scan_chosen_arch(unsigned long node)
  33 {
  34         BUG();
  35 }
  36
  37 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
  38 {
  39         BUG();
  40 }
  41
  42 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
  43 {
  44         return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
  45 }
  46
  47 void __init add_dtb(u64 data)
  48 {
  49         initial_boot_params = phys_to_virt((u64) (u32) data +
  50                                 offsetof(struct setup_data, data));
  51 }