smbios: Drop the eos parameter

We can store this in the context and avoid passing it to each function.
This makes it easier to follow and will also allow keeping track of the
end of the string table (in future patches).

Add an 'eos' field to the context and create a function to set it up.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

1 files changed, 36 insertions, 24 deletions

diff --git a/lib/smbios.c b/lib/smbios.c
index 4d2cb0f85e..43628d6757 100644
--- a/lib/smbios.c
+++ b/lib/smbios.c
@@ -22,10 +22,13 @@
  *
  * @node:	node containing the information to write (ofnode_null() if none)
  * @dev:	sysinfo device to use (NULL if none)
+ * @eos:	end-of-string pointer for the table being processed. This is set
+ *		up when we start processing a table
  */
 struct smbios_ctx {
 	ofnode node;
 	struct udevice *dev;
+	char *eos;
 };
 
 /**
@@ -57,14 +60,15 @@ struct smbios_write_method {
  * This adds a string to the string area which is appended directly after
  * the formatted portion of an SMBIOS structure.
  *
- * @start:	string area start address
+ * @ctx:	SMBIOS context
  * @str:	string to add
  * @return:	string number in the string area (1 or more)
  */
-static int smbios_add_string(char *start, const char *str)
+static int smbios_add_string(struct smbios_ctx *ctx, const char *str)
 {
 	int i = 1;
-	char *p = start;
+	char *p = ctx->eos;
+
 	if (!*str)
 		str = "Unknown";
 
@@ -89,26 +93,28 @@ static int smbios_add_string(char *start, const char *str)
 /**
  * smbios_add_prop() - Add a property from the device tree
  *
- * @start:	string area start address
  * @ctx:	context for writing the tables
  * @prop:	property to write
  * @return 0 if not found, else SMBIOS string number (1 or more)
  */
-static int smbios_add_prop(char *start, struct smbios_ctx *ctx,
-			   const char *prop)
+static int smbios_add_prop(struct smbios_ctx *ctx, const char *prop)
 {
-
 	if (IS_ENABLED(CONFIG_OF_CONTROL)) {
 		const char *str;
 
 		str = ofnode_read_string(ctx->node, prop);
 		if (str)
-			return smbios_add_string(start, str);
+			return smbios_add_string(ctx, str);
 	}
 
 	return 0;
 }
 
+static void smbios_set_eos(struct smbios_ctx *ctx, char *eos)
+{
+	ctx->eos = eos;
+}
+
 /**
  * smbios_string_table_len() - compute the string area size
  *
@@ -140,9 +146,10 @@ static int smbios_write_type0(ulong *current, int handle,
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type0));
 	fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
-	t->vendor = smbios_add_string(t->eos, "U-Boot");
-	t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION);
-	t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE);
+	smbios_set_eos(ctx, t->eos);
+	t->vendor = smbios_add_string(ctx, "U-Boot");
+	t->bios_ver = smbios_add_string(ctx, PLAIN_VERSION);
+	t->bios_release_date = smbios_add_string(ctx, U_BOOT_DMI_DATE);
 #ifdef CONFIG_ROM_SIZE
 	t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
 #endif
@@ -180,17 +187,18 @@ static int smbios_write_type1(ulong *current, int handle,
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type1));
 	fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
-	t->manufacturer = smbios_add_prop(t->eos, ctx, "manufacturer");
-	t->product_name = smbios_add_prop(t->eos, ctx, "product");
-	t->version = smbios_add_prop(t->eos, ctx, "version");
+	smbios_set_eos(ctx, t->eos);
+	t->manufacturer = smbios_add_prop(ctx, "manufacturer");
+	t->product_name = smbios_add_prop(ctx, "product");
+	t->version = smbios_add_prop(ctx, "version");
 	if (serial_str) {
-		t->serial_number = smbios_add_string(t->eos, serial_str);
+		t->serial_number = smbios_add_string(ctx, serial_str);
 		strncpy((char *)t->uuid, serial_str, sizeof(t->uuid));
 	} else {
-		t->serial_number = smbios_add_prop(t->eos, ctx, "serial");
+		t->serial_number = smbios_add_prop(ctx, "serial");
 	}
-	t->sku_number = smbios_add_prop(t->eos, ctx, "sku");
-	t->family = smbios_add_prop(t->eos, ctx, "family");
+	t->sku_number = smbios_add_prop(ctx, "sku");
+	t->family = smbios_add_prop(ctx, "family");
 
 	len = t->length + smbios_string_table_len(t->eos);
 	*current += len;
@@ -208,9 +216,10 @@ static int smbios_write_type2(ulong *current, int handle,
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type2));
 	fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
-	t->manufacturer = smbios_add_prop(t->eos, ctx, "manufacturer");
-	t->product_name = smbios_add_prop(t->eos, ctx, "product");
-	t->asset_tag_number = smbios_add_prop(t->eos, ctx, "asset-tag");
+	smbios_set_eos(ctx, t->eos);
+	t->manufacturer = smbios_add_prop(ctx, "manufacturer");
+	t->product_name = smbios_add_prop(ctx, "product");
+	t->asset_tag_number = smbios_add_prop(ctx, "asset-tag");
 	t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
 	t->board_type = SMBIOS_BOARD_MOTHERBOARD;
 
@@ -230,7 +239,8 @@ static int smbios_write_type3(ulong *current, int handle,
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type3));
 	fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
-	t->manufacturer = smbios_add_prop(t->eos, ctx, "manufacturer");
+	smbios_set_eos(ctx, t->eos);
+	t->manufacturer = smbios_add_prop(ctx, "manufacturer");
 	t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
 	t->bootup_state = SMBIOS_STATE_SAFE;
 	t->power_supply_state = SMBIOS_STATE_SAFE;
@@ -273,8 +283,8 @@ static void smbios_write_type4_dm(struct smbios_type4 *t,
 #endif
 
 	t->processor_family = processor_family;
-	t->processor_manufacturer = smbios_add_string(t->eos, vendor);
-	t->processor_version = smbios_add_string(t->eos, name);
+	t->processor_manufacturer = smbios_add_string(ctx, vendor);
+	t->processor_version = smbios_add_string(ctx, name);
 }
 
 static int smbios_write_type4(ulong *current, int handle,
@@ -286,6 +296,7 @@ static int smbios_write_type4(ulong *current, int handle,
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type4));
 	fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
+	smbios_set_eos(ctx, t->eos);
 	t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
 	smbios_write_type4_dm(t, ctx);
 	t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
@@ -311,6 +322,7 @@ static int smbios_write_type32(ulong *current, int handle,
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type32));
 	fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
+	smbios_set_eos(ctx, t->eos);
 
 	*current += len;
 	unmap_sysmem(t);