Author: uwe
Date: 2007-09-25 02:22:18 +0200 (Tue, 25 Sep 2007)
New Revision: 500
Modified:
LinuxBIOSv3/arch/x86/linuxbios_table.c
LinuxBIOSv3/include/tables.h
Log:
Add a pointer to the root device to the LinuxBIOS table. Used for
example to access the device list from Open Firmware.
Signed-off-by: Jens Freimann <[EMAIL PROTECTED]>
Acked-by: Uwe Hermann <[EMAIL PROTECTED]>
Modified: LinuxBIOSv3/arch/x86/linuxbios_table.c
===================================================================
--- LinuxBIOSv3/arch/x86/linuxbios_table.c 2007-09-25 00:16:31 UTC (rev
499)
+++ LinuxBIOSv3/arch/x86/linuxbios_table.c 2007-09-25 00:22:18 UTC (rev
500)
@@ -385,6 +385,25 @@
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 @@
* 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);
Modified: LinuxBIOSv3/include/tables.h
===================================================================
--- LinuxBIOSv3/include/tables.h 2007-09-25 00:16:31 UTC (rev 499)
+++ LinuxBIOSv3/include/tables.h 2007-09-25 00:22:18 UTC (rev 500)
@@ -167,6 +167,14 @@
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 */
--
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