avr32: add ATAG_BOARDINFO

This patch adds a new ATAG_BORADINFO to U-Boot. This tag is intended to hand over the bd->bi_board_number to the linux kernel for early stage board information like a board revision or other kind of board specific decisions necessary before the linux peripherial drivers are up. Signed-off-by: Andreas Bießmann <biessmann@corscience.de>

avr32: add ATAG_BOARDINFO
This patch adds a new ATAG_BORADINFO to U-Boot. This tag is intended to hand over the bd->bi_board_number to the linux kernel for early stage board information like a board revision or other kind of board specific decisions necessary before the linux peripherial drivers are up. Signed-off-by: Andreas Bießmann <biessmann@corscience.de>
Andreas Bießmann · Albert ARIBAUD
1 parent a950c81851
Showing 2 changed files with 19 additions and 0 deletions Side-by-side Diff
arch/avr32/include/asm/setup.h
arch/avr32/lib/bootm.c
@@ -107,6 +107,13 @@
  
 #define AETH_INVALID_PHY	0xff
  
+/* board information information */
+#define ATAG_BOARDINFO	0x54410008
+
+struct tag_boardinfo {
+	u32	board_number;
+};
+
 struct tag {
 	struct tag_header hdr;
 	union {
@@ -115,6 +122,7 @@
 		struct tag_cmdline cmdline;
 		struct tag_clock clock;
 		struct tag_ethernet ethernet;
+		struct tag_boardinfo boardinfo;
 	} u;
 };
  
@@ -165,6 +165,16 @@
 	return params;
 }
  
+static struct tag *setup_boardinfo_tag(struct tag *params)
+{
+	params->hdr.tag = ATAG_BOARDINFO;
+	params->hdr.size = tag_size(tag_boardinfo);
+
+	params->u.boardinfo.board_number = gd->bd->bi_board_number;
+
+	return tag_next(params);
+}
+
 static void setup_end_tag(struct tag *params)
 {
 	params->hdr.tag = ATAG_NONE;
@@ -195,6 +205,7 @@
 	params = setup_commandline_tag(params, commandline);
 	params = setup_clock_tags(params);
 	params = setup_ethernet_tags(params);
+	params = setup_boardinfo_tag(params);
 	setup_end_tag(params);
  
 	printf("\nStarting kernel at %p (params at %p)...\n\n",
...	...	@@ -107,6 +107,13 @@
107	107
108	108	#define AETH_INVALID_PHY 0xff
109	109
	110	+/* board information information */
	111	+#define ATAG_BOARDINFO 0x54410008
	112	+
	113	+struct tag_boardinfo {
	114	+ u32 board_number;
	115	+};
	116	+
110	117	struct tag {
111	118	struct tag_header hdr;
112	119	union {
...	...	@@ -115,6 +122,7 @@
115	122	struct tag_cmdline cmdline;
116	123	struct tag_clock clock;
117	124	struct tag_ethernet ethernet;
	125	+ struct tag_boardinfo boardinfo;
118	126	} u;
119	127	};
120	128
...	...	@@ -165,6 +165,16 @@
165	165	return params;
166	166	}
167	167
	168	+static struct tag setup_boardinfo_tag(struct tag params)
	169	+{
	170	+ params->hdr.tag = ATAG_BOARDINFO;
	171	+ params->hdr.size = tag_size(tag_boardinfo);
	172	+
	173	+ params->u.boardinfo.board_number = gd->bd->bi_board_number;
	174	+
	175	+ return tag_next(params);
	176	+}
	177	+
168	178	static void setup_end_tag(struct tag *params)
169	179	{
170	180	params->hdr.tag = ATAG_NONE;
...	...	@@ -195,6 +205,7 @@
195	205	params = setup_commandline_tag(params, commandline);
196	206	params = setup_clock_tags(params);
197	207	params = setup_ethernet_tags(params);
	208	+ params = setup_boardinfo_tag(params);
198	209	setup_end_tag(params);
199	210
200	211	printf("\nStarting kernel at %p (params at %p)...\n\n",