[syslinux] [PATCH] [memdisk] Additional EDD Device Parameter Table fields

[Miller, Shao]

>From 2454bb2c28476e2c7868e965fab114e8be326fa2 Mon Sep 17 00:00:00 2001
From: Shao Miller <shao.miller at yrdsb.edu.on.ca>
Date: Fri, 31 Jul 2009 01:39:56 -0400
Subject: [PATCH] [memdisk] Additional EDD Device Parameter Table fields

Some additional fields from the EDD-4 spec. draft for the Device
Parameter
Table have been added into the structure in setup.c and memdisk.inc.
These
were added in the hopes of resolving a FreeDOS MEMDISK bug on IBM
ThinkPads.
---
 memdisk/memdisk.inc |   11 +++++++++++
 memdisk/setup.c     |   10 ++++++++++
 2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/memdisk/memdisk.inc b/memdisk/memdisk.inc
index 2699c34..b4d45c4 100644
--- a/memdisk/memdisk.inc
+++ b/memdisk/memdisk.inc
@@ -1008,6 +1008,17 @@ EDD_DPT:
 .totalsize	dd 0, 0			; Filled in by installer
 .bytespersec	dw SECTORSIZE
 .eddtable	dw -1, -1		; Invalid DPTE pointer
+.dpikey		dw 0			; Device Path Info magic
(not impl.)
+					; Would be 0beddh if implemented
+.dpilen		db 2ch			; DPI len
+.res1		db 0			; Reserved
+.res2		db 0			; Reserved
+.bustype	equ 'PCI '		; Host bus type (4 bytes, space
padded)
+.inttype	equ 'ATA     '		; Interface type (8 bytes, spc.
padded)
+.intpath	dd 0, 0			; Interface path
+.devpath	dd 0, 0, 0, 0		; Device path
+.res3		db 0			; Reserved
+.chksum		db 0			; DPI checksum (not
implemented)
 
 %endif
 
diff --git a/memdisk/setup.c b/memdisk/setup.c
index 98c4b69..b8efd8a 100644
--- a/memdisk/setup.c
+++ b/memdisk/setup.c
@@ -80,6 +80,16 @@ struct edd_dpt {
     uint64_t sectors;		/* Total sectors */
     uint16_t bytespersec;	/* Bytes/sector */
     uint16_t dpte_off, dpte_seg;	/* DPTE pointer */
+    uint16_t dpikey;		/* Device Path Info magic */
+    uint8_t  dpilen;		/* DPI length */
+    uint8_t  res1;		/* Reserved */
+    uint8_t  res2;		/* Reserved */
+    uint8_t  bustype[4];	/* Host bus type */
+    uint8_t  inttype[8];	/* Interface type */
+    uint64_t intpath;		/* Interface path */
+    uint64_t devpath[2];	/* Device path (double QuadWord!) */
+    uint8_t  res3;		/* Reserved */
+    uint8_t  chksum;		/* DPI checksum */
 };
 
 struct patch_area {
-- 
1.5.6.3

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