1 // SPDX-License-Identifier: GPL-2.0
7  * Copyright (C) 2013 - 2015 Linaro Ltd.
30 	if (md->attribute & (EFI_MEMORY_WB|EFI_MEMORY_WT|EFI_MEMORY_WC))  in is_memory()
45 		if (!(md->attribute & EFI_MEMORY_RUNTIME))  in efi_to_phys()
47 		if (md->virt_addr == 0)  in efi_to_phys()
50 		if (md->virt_addr <= addr &&  in efi_to_phys()
51 		    (addr - md->virt_addr) < (md->num_pages << EFI_PAGE_SHIFT))  in efi_to_phys()
52 			return md->phys_addr + addr - md->virt_addr;  in efi_to_phys()
75 			pr_err("Could not map screen_info config table\n");  in init_screen_info()
100 		pr_warn("Unable to map EFI system table.\n");  in uefi_init()
101 		return -ENOMEM;  in uefi_init()
108 	retval = efi_systab_check_header(&systab->hdr);  in uefi_init()
112 	efi.runtime = systab->runtime;  in uefi_init()
113 	efi.runtime_version = systab->hdr.revision;  in uefi_init()
115 	efi_systab_report_header(&systab->hdr, efi_to_phys(systab->fw_vendor));  in uefi_init()
117 	table_size = sizeof(efi_config_table_t) * systab->nr_tables;  in uefi_init()
118 	config_tables = early_memremap_ro(efi_to_phys(systab->tables),  in uefi_init()
121 		pr_warn("Unable to map EFI config table array.\n");  in uefi_init()
122 		retval = -ENOMEM;  in uefi_init()
125 	retval = efi_config_parse_tables(config_tables, systab->nr_tables,  in uefi_init()
139 	switch (md->type) {  in is_usable_memory()
152 		return (md->attribute & EFI_MEMORY_WB);  in is_usable_memory()
165 		pr_info("Processing EFI memory map:\n");  in reserve_regions()
169 	 * regions. Most memblocks at this point originate from memory nodes  in reserve_regions()
170 	 * in the DT and UEFI uses its own memory map instead. However, if  in reserve_regions()
171 	 * KHO is enabled, scratch regions, which are good known memory  in reserve_regions()
172 	 * must be preserved.  in reserve_regions()
179 		/* Remove all non-KHO regions */  in reserve_regions()
182 				memblock_remove(r->base, r->size);  in reserve_regions()
183 				r--;  in reserve_regions()
189 		 * if there are any at this point, they originate from memory  in reserve_regions()
190 		 * nodes in the DT, and UEFI uses its own memory map instead.  in reserve_regions()
196 		paddr = md->phys_addr;  in reserve_regions()
197 		npages = md->num_pages;  in reserve_regions()
202 			pr_info("  0x%012llx-0x%012llx %s\n",  in reserve_regions()
203 				paddr, paddr + (npages << EFI_PAGE_SHIFT) - 1,  in reserve_regions()
212 			 * Special purpose memory is 'soft reserved', which  in reserve_regions()
218 			    (md->attribute & EFI_MEMORY_SP))  in reserve_regions()
226 			/* keep ACPI reclaim memory intact for kexec etc. */  in reserve_regions()
227 			if (md->type == EFI_ACPI_RECLAIM_MEMORY)  in reserve_regions()
245 		* If we are booting via UEFI, the UEFI memory map is the only  in efi_init()
246 		* description of memory we have, so there is little point in  in efi_init()
249 		panic("Unable to map EFI memory map.\n");  in efi_init()