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Add a pointer to the root device to the LinuxBIOS table. Used for

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example to access the device list from Open Firmware.

Signed-off-by: Jens Freimann <jens@freimann.org>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@500 f3766cd6-281f-0410-b1cd-43a5c92072e9
This commit is contained in:
Uwe Hermann 2007-09-25 00:22:18 +00:00
parent d3f1396e9b
commit d2d637c4ac
2 changed files with 31 additions and 1 deletions
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24
arch/x86/linuxbios_table.c
View file

@ -385,6 +385,25 @@ static struct lb_memory *build_lb_mem(struct lb_header *head)
return mem;
}
/**
* Add pointer to device tree to LinuxBIOS table.
*
* @param head Pointer to lbtable header.
* @return TODO
*/
struct lb_devtree *lb_devtree(struct lb_header *head)
{
struct lb_devtree *lbdev = NULL;
struct device *dev = NULL;
lbdev = (struct lb_devtree *)lb_new_record(head);
lbdev->tag = LB_TAG_DEVTREE_PTR;
lbdev->size = sizeof(*lbdev);
lbdev->dev_root_ptr = &dev_root;
return lbdev;
}
unsigned long write_linuxbios_table(
unsigned long low_table_start, unsigned long low_table_end,
unsigned long rom_table_start, unsigned long rom_table_end)
@ -431,12 +450,15 @@ unsigned long write_linuxbios_table(
* size of the linuxbios table.
*/
/* Record our motheboard */
/* Record our motherboard */
lb_mainboard(head);
/* Record our various random string information */
lb_strings(head);
/* Record a pointer to the LinuxBIOS device tree */
lb_devtree(head);
/* Remember where my valid memory ranges are */
return lb_table_fini(head);

8
include/tables.h
View file

@ -167,6 +167,14 @@ struct lb_string {
u8 string[0];
};
#define LB_TAG_DEVTREE_PTR 0x000e
struct lb_devtree {
u32 tag;
u32 size;
u32 dev_root_ptr; /* Pointer to the root device */
};
/* The following structures are for the cmos definitions table */
#define LB_TAG_CMOS_OPTION_TABLE 200
/* cmos header record */