33 	atomic_t    start;  member
47 	return atomic_read(&prz->buffer->start);  in buffer_start()
57 		old = atomic_read(&prz->buffer->start);  in buffer_start_add_atomic()
61 	} while (atomic_cmpxchg(&prz->buffer->start, old, new) != old);  in buffer_start_add_atomic()
94 	old = atomic_read(&prz->buffer->start);  in buffer_start_add_locked()
98 	atomic_set(&prz->buffer->start, new);  in buffer_start_add_locked()
156 	unsigned int start, unsigned int count)  in persistent_ram_update_ecc()  argument
169 	block = buffer->data + (start & ~(ecc_block_size - 1));  in persistent_ram_update_ecc()
170 	par = prz->par_buffer + (start / ecc_block_size) * ecc_size;  in persistent_ram_update_ecc()
178 	} while (block < buffer->data + start + count);  in persistent_ram_update_ecc()
299 	const void *s, unsigned int start, unsigned int count)  in persistent_ram_update()  argument
302 	memcpy(buffer->data + start, s, count);  in persistent_ram_update()
303 	persistent_ram_update_ecc(prz, start, count);  in persistent_ram_update()
310 	size_t start = buffer_start(prz);  in persistent_ram_save_old()  local
325 	memcpy(prz->old_log, &buffer->data[start], size - start);  in persistent_ram_save_old()
326 	memcpy(prz->old_log + size - start, &buffer->data[0], start);  in persistent_ram_save_old()
334 	size_t start;  in persistent_ram_write()  local
343 	start = buffer_start_add(prz, c);  in persistent_ram_write()
345 	rem = prz->buffer_size - start;  in persistent_ram_write()
347 		persistent_ram_update(prz, s, start, rem);  in persistent_ram_write()
350 		start = 0;  in persistent_ram_write()
352 	persistent_ram_update(prz, s, start, c);  in persistent_ram_write()
378 	atomic_set(&prz->buffer->start, 0);  in persistent_ram_zap()
383 static void *persistent_ram_vmap(phys_addr_t start, size_t size,  in persistent_ram_vmap()  argument
393 	page_start = start - offset_in_page(start);  in persistent_ram_vmap()
394 	page_count = DIV_ROUND_UP(size + offset_in_page(start), PAGE_SIZE);  in persistent_ram_vmap()
418 static void *persistent_ram_iomap(phys_addr_t start, size_t size,  in persistent_ram_iomap()  argument
423 	if (!request_mem_region(start, size, "persistent_ram")) {  in persistent_ram_iomap()
425 			(unsigned long long)size, (unsigned long long)start);  in persistent_ram_iomap()
433 		va = ioremap(start, size);  in persistent_ram_iomap()
435 		va = ioremap_wc(start, size);  in persistent_ram_iomap()
440 static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size,  in persistent_ram_buffer_map()  argument
443 	prz->paddr = start;  in persistent_ram_buffer_map()
446 	if (pfn_valid(start >> PAGE_SHIFT))  in persistent_ram_buffer_map()
447 		prz->vaddr = persistent_ram_vmap(start, size, memtype);  in persistent_ram_buffer_map()
449 		prz->vaddr = persistent_ram_iomap(start, size, memtype);  in persistent_ram_buffer_map()
453 			(unsigned long long)size, (unsigned long long)start);  in persistent_ram_buffer_map()
457 	prz->buffer = prz->vaddr + offset_in_page(start);  in persistent_ram_buffer_map()
514 struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,  in persistent_ram_new()  argument
527 	ret = persistent_ram_buffer_map(start, size, prz, memtype);  in persistent_ram_new()