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avr32: add ATAG_BOARDINFO

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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>
This commit is contained in:
Andreas Bießmann 2011-04-12 23:25:41 +00:00 committed by Albert ARIBAUD
parent a950c81851
commit 24890f1198
2 changed files with 19 additions and 0 deletions
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8
arch/avr32/include/asm/setup.h
View File

@ -107,6 +107,13 @@ struct tag_ethernet {
#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 {
struct tag_cmdline cmdline;
struct tag_clock clock;
struct tag_ethernet ethernet;
struct tag_boardinfo boardinfo;
} u;
};

11
arch/avr32/lib/bootm.c
View File

@ -165,6 +165,16 @@ static struct tag *setup_ethernet_tags(struct tag *params)
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 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima
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",