Function initarm

freebsd/arm/arm/machdep.c:735–957

#ifdef FDT
void *
initarm(struct arm_boot_params *abp)
{
	struct mem_region mem_regions[FDT_MEM_REGIONS];
	vm_paddr_t lastaddr;
	vm_offset_t dtbp, kernelstack, dpcpu;
	char *env;
	void *kmdp;
	int err_devmap, mem_regions_sz;
	phandle_t root;
	char dts_version[255];
#ifdef EFI
	struct efi_map_header *efihdr;
#endif

	/* get last allocated physical address */
	arm_physmem_kernaddr = abp->abp_physaddr;
	lastaddr = parse_boot_param(abp) - KERNVIRTADDR + arm_physmem_kernaddr;

	set_cpufuncs();
	cpuinfo_init();

	/*
	 * Find the dtb passed in by the boot loader.
	 */
	kmdp = preload_search_by_type("elf kernel");
	dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
#if defined(FDT_DTB_STATIC)
	/*
	 * In case the device tree blob was not retrieved (from metadata) try
	 * to use the statically embedded one.
	 */
	if (dtbp == (vm_offset_t)NULL)
		dtbp = (vm_offset_t)&fdt_static_dtb;
#endif

	if (OF_install(OFW_FDT, 0) == FALSE)
		panic("Cannot install FDT");

	if (OF_init((void *)dtbp) != 0)
		panic("OF_init failed with the found device tree");

#if defined(LINUX_BOOT_ABI)
	arm_parse_fdt_bootargs();
#endif

#ifdef EFI
	efihdr = (struct efi_map_header *)preload_search_info(kmdp,
	    MODINFO_METADATA | MODINFOMD_EFI_MAP);
	if (efihdr != NULL) {
		arm_add_efi_map_entries(efihdr, mem_regions, &mem_regions_sz);
	} else
#endif
	{
		/* Grab physical memory regions information from device tree. */
		if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,NULL) != 0)
			panic("Cannot get physical memory regions");
	}