1 // SPDX-License-Identifier: GPL-2.0
49  * efi_memmap_alloc - Allocate memory for the EFI memory map
62 	WARN_ON(data->phys_map || data->size);  in efi_memmap_alloc()
64 	data->size = num_entries * efi.memmap.desc_size;  in efi_memmap_alloc()
65 	data->desc_version = efi.memmap.desc_version;  in efi_memmap_alloc()
66 	data->desc_size = efi.memmap.desc_size;  in efi_memmap_alloc()
67 	data->flags &= ~(EFI_MEMMAP_SLAB | EFI_MEMMAP_MEMBLOCK);  in efi_memmap_alloc()
68 	data->flags |= efi.memmap.flags & EFI_MEMMAP_LATE;  in efi_memmap_alloc()
71 		data->flags |= EFI_MEMMAP_SLAB;  in efi_memmap_alloc()
72 		data->phys_map = __efi_memmap_alloc_late(data->size);  in efi_memmap_alloc()
74 		data->flags |= EFI_MEMMAP_MEMBLOCK;  in efi_memmap_alloc()
75 		data->phys_map = __efi_memmap_alloc_early(data->size);  in efi_memmap_alloc()
78 	if (!data->phys_map)  in efi_memmap_alloc()
79 		return -ENOMEM;  in efi_memmap_alloc()
84  * efi_memmap_install - Install a new EFI memory map in efi.memmap
88  * to switch from early to late mappings. It simply uses the existing
104  * efi_memmap_split_count - Count number of additional EFI memmap entries
117 	start = md->phys_addr;  in efi_memmap_split_count()
118 	end = start + (md->num_pages << EFI_PAGE_SHIFT) - 1;  in efi_memmap_split_count()
121 	m_start = range->start;  in efi_memmap_split_count()
122 	m_end = range->end;  in efi_memmap_split_count()
125 		/* split into 2 parts */  in efi_memmap_split_count()
131 		/* split into 3 parts */  in efi_memmap_split_count()
134 		/* split into 2 parts */  in efi_memmap_split_count()
143  * efi_memmap_insert - Insert a memory region in an EFI memmap
144  * @old_memmap: The existing EFI memory map structure
160 	m_start = mem->range.start;  in efi_memmap_insert()
161 	m_end = mem->range.end;  in efi_memmap_insert()
162 	m_attr = mem->attribute;  in efi_memmap_insert()
175 	for (old = old_memmap->map, new = buf;  in efi_memmap_insert()
176 	     old < old_memmap->map_end;  in efi_memmap_insert()
177 	     old += old_memmap->desc_size, new += old_memmap->desc_size) {  in efi_memmap_insert()
180 		memcpy(new, old, old_memmap->desc_size);  in efi_memmap_insert()
182 		start = md->phys_addr;  in efi_memmap_insert()
183 		end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1;  in efi_memmap_insert()
186 			md->attribute |= m_attr;  in efi_memmap_insert()
191 			md->attribute |= m_attr;  in efi_memmap_insert()
192 			md->num_pages = (m_end - md->phys_addr + 1) >>  in efi_memmap_insert()
195 			new += old_memmap->desc_size;  in efi_memmap_insert()
196 			memcpy(new, old, old_memmap->desc_size);  in efi_memmap_insert()
198 			md->phys_addr = m_end + 1;  in efi_memmap_insert()
199 			md->num_pages = (end - md->phys_addr + 1) >>  in efi_memmap_insert()
205 			md->num_pages = (m_start - md->phys_addr) >>  in efi_memmap_insert()
208 			new += old_memmap->desc_size;  in efi_memmap_insert()
209 			memcpy(new, old, old_memmap->desc_size);  in efi_memmap_insert()
211 			md->attribute |= m_attr;  in efi_memmap_insert()
212 			md->phys_addr = m_start;  in efi_memmap_insert()
213 			md->num_pages = (m_end - m_start + 1) >>  in efi_memmap_insert()
216 			new += old_memmap->desc_size;  in efi_memmap_insert()
217 			memcpy(new, old, old_memmap->desc_size);  in efi_memmap_insert()
219 			md->phys_addr = m_end + 1;  in efi_memmap_insert()
220 			md->num_pages = (end - m_end) >>  in efi_memmap_insert()
227 			md->num_pages = (m_start - md->phys_addr) >>  in efi_memmap_insert()
230 			new += old_memmap->desc_size;  in efi_memmap_insert()
231 			memcpy(new, old, old_memmap->desc_size);  in efi_memmap_insert()
233 			md->phys_addr = m_start;  in efi_memmap_insert()
234 			md->num_pages = (end - md->phys_addr + 1) >>  in efi_memmap_insert()
236 			md->attribute |= m_attr;  in efi_memmap_insert()