35 	atomic_t    start;  member
49 	return atomic_read(&prz->buffer->start);  in buffer_start()
62 	old = atomic_read(&prz->buffer->start);  in buffer_start_add()
66 	atomic_set(&prz->buffer->start, new);  in buffer_start_add()
123 	unsigned int start, unsigned int count)  in persistent_ram_update_ecc()  argument
136 	block = buffer->data + (start & ~(ecc_block_size - 1));  in persistent_ram_update_ecc()
137 	par = prz->par_buffer + (start / ecc_block_size) * ecc_size;  in persistent_ram_update_ecc()
145 	} while (block < buffer->data + start + count);  in persistent_ram_update_ecc()
275 	const void *s, unsigned int start, unsigned int count)  in persistent_ram_update()  argument
278 	memcpy_toio(buffer->data + start, s, count);  in persistent_ram_update()
279 	persistent_ram_update_ecc(prz, start, count);  in persistent_ram_update()
283 	const void __user *s, unsigned int start, unsigned int count)  in persistent_ram_update_user()  argument
286 	int ret = unlikely(copy_from_user(buffer->data + start, s, count)) ?  in persistent_ram_update_user()
288 	persistent_ram_update_ecc(prz, start, count);  in persistent_ram_update_user()
296 	size_t start = buffer_start(prz);  in persistent_ram_save_old()  local
311 	memcpy_fromio(prz->old_log, &buffer->data[start], size - start);  in persistent_ram_save_old()
312 	memcpy_fromio(prz->old_log + size - start, &buffer->data[0], start);  in persistent_ram_save_old()
320 	size_t start;  in persistent_ram_write()  local
329 	start = buffer_start_add(prz, c);  in persistent_ram_write()
331 	rem = prz->buffer_size - start;  in persistent_ram_write()
333 		persistent_ram_update(prz, s, start, rem);  in persistent_ram_write()
336 		start = 0;  in persistent_ram_write()
338 	persistent_ram_update(prz, s, start, c);  in persistent_ram_write()
349 	size_t start;  in persistent_ram_write_user()  local
358 	start = buffer_start_add(prz, c);  in persistent_ram_write_user()
360 	rem = prz->buffer_size - start;  in persistent_ram_write_user()
362 		ret = persistent_ram_update_user(prz, s, start, rem);  in persistent_ram_write_user()
365 		start = 0;  in persistent_ram_write_user()
368 		ret = persistent_ram_update_user(prz, s, start, c);  in persistent_ram_write_user()
394 	atomic_set(&prz->buffer->start, 0);  in persistent_ram_zap()
403 static void *persistent_ram_vmap(phys_addr_t start, size_t size,  in persistent_ram_vmap()  argument
413 	page_start = start - offset_in_page(start);  in persistent_ram_vmap()
414 	page_count = DIV_ROUND_UP(size + offset_in_page(start), PAGE_SIZE);  in persistent_ram_vmap()
454 	return vaddr + offset_in_page(start);  in persistent_ram_vmap()
457 static void *persistent_ram_iomap(phys_addr_t start, size_t size,  in persistent_ram_iomap()  argument
462 	if (!request_mem_region(start, size, label ?: "ramoops")) {  in persistent_ram_iomap()
465 			(unsigned long long)size, (unsigned long long)start);  in persistent_ram_iomap()
470 		va = ioremap(start, size);  in persistent_ram_iomap()
472 		va = ioremap_wc(start, size);  in persistent_ram_iomap()
482 static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size,  in persistent_ram_buffer_map()  argument
485 	prz->paddr = start;  in persistent_ram_buffer_map()
488 	if (pfn_valid(start >> PAGE_SHIFT))  in persistent_ram_buffer_map()
489 		prz->vaddr = persistent_ram_vmap(start, size, memtype);  in persistent_ram_buffer_map()
491 		prz->vaddr = persistent_ram_iomap(start, size, memtype,  in persistent_ram_buffer_map()
496 			(unsigned long long)size, (unsigned long long)start);  in persistent_ram_buffer_map()
577 struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,  in persistent_ram_new()  argument
597 	ret = persistent_ram_buffer_map(start, size, prz, memtype);  in persistent_ram_new()