linux-4.4.1/__reserved_mem_alloc_size() の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-4.4.1/__reserved_mem_alloc_size() へ行く。
• linux-4.4.1/__reserved_mem_alloc_size() の差分を削除

*参照元 [#lbfea9f0]
#backlinks

*説明 [#d2a38b35]
-パス: [[linux-4.4.1/drivers/of/of_reserved_mem.c]]

-FIXME: これは何？
--説明


**引数 [#maa4204e]
-unsigned long node
--
-const char *uname
--
-phys_addr_t *res_base
--
--[[linux-4.4.1/phys_addr_t]]
-phys_addr_t *res_size
--


**返り値 [#w8476e30]
-int
--


**参考 [#m3de13f1]


*実装 [#s74636f2]
 /**
  * res_mem_alloc_size() - allocate reserved memory described by 'size', 'align'
  *			  and 'alloc-ranges' properties
  */
 static int __init __reserved_mem_alloc_size(unsigned long node,
 	const char *uname, phys_addr_t *res_base, phys_addr_t *res_size)
 {
 	int t_len = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32);
 	phys_addr_t start = 0, end = 0;
 	phys_addr_t base = 0, align = 0, size;
 	int len;
 	const __be32 *prop;
 	int nomap;
 	int ret;
 
-
--[[linux-4.4.1/dt_root_addr_cells(global)]]
--[[linux-4.4.1/dt_root_size_cells(global)]]

 	prop = of_get_flat_dt_prop(node, "size", &len);
 	if (!prop)
 		return -EINVAL;
 
-
--[[linux-4.4.1/of_get_flat_dt_prop()]]

 	if (len != dt_root_size_cells * sizeof(__be32)) {
 		pr_err("Reserved memory: invalid size property in '%s' node.\n",
 				uname);
 		return -EINVAL;
 	}
 	size = dt_mem_next_cell(dt_root_size_cells, &prop);
 
-
--[[linux-4.4.1/pr_err()]]
--[[linux-4.4.1/dt_mem_next_call()]]

 	nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;
 
-
--[[linux-4.4.1/of_get_flat_dt_prop()]]

 	prop = of_get_flat_dt_prop(node, "alignment", &len);
 	if (prop) {
 		if (len != dt_root_addr_cells * sizeof(__be32)) {
 			pr_err("Reserved memory: invalid alignment property in '%s' node.\n",
 				uname);
 			return -EINVAL;
 		}
 		align = dt_mem_next_cell(dt_root_addr_cells, &prop);
 	}
 
 	/* Need adjust the alignment to satisfy the CMA requirement */
 	if (IS_ENABLED(CONFIG_CMA) && of_flat_dt_is_compatible(node, "shared-dma-pool"))
 		align = max(align, (phys_addr_t)PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order));
 
 	prop = of_get_flat_dt_prop(node, "alloc-ranges", &len);
 	if (prop) {
 
 		if (len % t_len != 0) {
 			pr_err("Reserved memory: invalid alloc-ranges property in '%s', skipping node.\n",
 			       uname);
 			return -EINVAL;
 		}
 
 		base = 0;
 
 		while (len > 0) {
 			start = dt_mem_next_cell(dt_root_addr_cells, &prop);
 			end = start + dt_mem_next_cell(dt_root_size_cells,
 						       &prop);
 
 			ret = early_init_dt_alloc_reserved_memory_arch(size,
 					align, start, end, nomap, &base);
 			if (ret == 0) {
 				pr_debug("Reserved memory: allocated memory for '%s' node: base %pa, size %ld MiB\n",
 					uname, &base,
 					(unsigned long)size / SZ_1M);
 				break;
 			}
 			len -= t_len;
 		}
 
-
--[[linux-4.4.1/early_init_dt_alloc_reserved_memory_arch()]]
--[[linux-4.4.1/pr_debug()]]

 	} else {
 		ret = early_init_dt_alloc_reserved_memory_arch(size, align,
 							0, 0, nomap, &base);
 		if (ret == 0)
 			pr_debug("Reserved memory: allocated memory for '%s' node: base %pa, size %ld MiB\n",
 				uname, &base, (unsigned long)size / SZ_1M);
 	}
 
 	if (base == 0) {
 		pr_info("Reserved memory: failed to allocate memory for node '%s'\n",
 			uname);
 		return -ENOMEM;
 	}
 
-
--[[linux-4.4.1/pr_info()]]

 	*res_base = base;
 	*res_size = size;
 
 	return 0;
 }


*コメント [#se0690c8]