xref: /titanic_41/usr/src/grub/grub-0.97/netboot/pxe.h (revision 1b8adde7ba7d5e04395c141c5400dc2cffd7d809)
1 /*
2  * Copyright (c) 2000 Alfred Perlstein <alfred@freebsd.org>
3  * All rights reserved.
4  * Copyright (c) 2000 Paul Saab <ps@freebsd.org>
5  * All rights reserved.
6  * Copyright (c) 2000 John Baldwin <jhb@freebsd.org>
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  *
30  * $FreeBSD: src/sys/boot/i386/libi386/pxe.h,v 1.4.2.2 2000/09/10 02:52:18 ps Exp $
31  */
32 
33 /*
34  * The typedefs and structures declared in this file
35  * clearly violate style(9), the reason for this is to conform to the
36  * typedefs/structure-names used in the Intel literature to avoid confusion.
37  *
38  * It's for your own good. :)
39  */
40 
41 /* SEGOFF16_t defined in separate header for Etherboot
42  */
43 #include <segoff.h>
44 
45 /* It seems that intel didn't think about ABI,
46  * either that or 16bit ABI != 32bit ABI (which seems reasonable)
47  * I have to thank Intel for the hair loss I incurred trying to figure
48  * out why PXE was mis-reading structures I was passing it (at least
49  * from my point of view)
50  *
51  * Solution: use gcc's '__attribute__ ((packed))' to correctly align
52  * structures passed into PXE
53  * Question: does this really work for PXE's expected ABI?
54  */
55 #define	PACKED		__attribute__ ((packed))
56 
57 #define	S_SIZE(s)	s, sizeof(s) - 1
58 
59 #define	IP_STR		"%d.%d.%d.%d"
60 #define	IP_ARGS(ip)					\
61 	(int)(ip >> 24) & 0xff, (int)(ip >> 16) & 0xff, \
62 	(int)(ip >> 8) & 0xff, (int)ip & 0xff
63 
64 #define	MAC_STR		"%02x:%02x:%02x:%02x:%02x:%02x"
65 #define	MAC_ARGS(mac)					\
66 	mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]
67 
68 #define	PXENFSROOTPATH	"/pxeroot"
69 
70 typedef struct {
71 	uint16_t		Seg_Addr;
72 	uint32_t		Phy_Addr;
73 	uint16_t		Seg_Size;
74 } PACKED SEGDESC_t; /* PACKED is required, otherwise gcc pads this out to 12
75 		       bytes - mbrown@fensystems.co.uk (mcb30) 17/5/03 */
76 
77 typedef	uint16_t		SEGSEL_t;
78 typedef	uint16_t		PXENV_STATUS_t;
79 typedef	uint32_t		IP4_t;
80 typedef	uint32_t		ADDR32_t;
81 typedef	uint16_t		UDP_PORT_t;
82 
83 #define	MAC_ADDR_LEN		16
84 typedef	uint8_t			MAC_ADDR[MAC_ADDR_LEN];
85 
86 /* PXENV+ */
87 typedef struct {
88 	uint8_t		Signature[6];	/* 'PXENV+' */
89 	uint16_t	Version;	/* MSB = major, LSB = minor */
90 	uint8_t		Length;		/* structure length */
91 	uint8_t		Checksum;	/* checksum pad */
92 	SEGOFF16_t	RMEntry;	/* SEG:OFF to PXE entry point */
93 	/* don't use PMOffset and PMSelector (from the 2.1 PXE manual) */
94 	uint32_t	PMOffset;	/* Protected mode entry */
95 	SEGSEL_t	PMSelector;	/* Protected mode selector */
96 	SEGSEL_t	StackSeg;	/* Stack segment address */
97 	uint16_t	StackSize;	/* Stack segment size (bytes) */
98 	SEGSEL_t	BC_CodeSeg;	/* BC Code segment address */
99 	uint16_t	BC_CodeSize;	/* BC Code segment size (bytes) */
100 	SEGSEL_t	BC_DataSeg;	/* BC Data segment address */
101 	uint16_t	BC_DataSize;	/* BC Data segment size (bytes) */
102 	SEGSEL_t	UNDIDataSeg;	/* UNDI Data segment address */
103 	uint16_t	UNDIDataSize;	/* UNDI Data segment size (bytes) */
104 	SEGSEL_t	UNDICodeSeg;	/* UNDI Code segment address */
105 	uint16_t	UNDICodeSize;	/* UNDI Code segment size (bytes) */
106 	SEGOFF16_t	PXEPtr;		/* SEG:OFF to !PXE struct,
107 					   only present when Version > 2.1 */
108 } PACKED pxenv_t;
109 
110 /* !PXE */
111 typedef struct {
112 	uint8_t		Signature[4];
113 	uint8_t		StructLength;
114 	uint8_t		StructCksum;
115 	uint8_t		StructRev;
116 	uint8_t		reserved_1;
117 	SEGOFF16_t	UNDIROMID;
118 	SEGOFF16_t	BaseROMID;
119 	SEGOFF16_t	EntryPointSP;
120 	SEGOFF16_t	EntryPointESP;
121 	SEGOFF16_t	StatusCallout;
122 	uint8_t		reserved_2;
123 	uint8_t		SegDescCn;
124 	SEGSEL_t	FirstSelector;
125 	SEGDESC_t	Stack;
126 	SEGDESC_t	UNDIData;
127 	SEGDESC_t	UNDICode;
128 	SEGDESC_t	UNDICodeWrite;
129 	SEGDESC_t	BC_Data;
130 	SEGDESC_t	BC_Code;
131 	SEGDESC_t	BC_CodeWrite;
132 } PACKED pxe_t;
133 
134 #define	PXENV_START_UNDI		0x0000
135 typedef struct {
136 	PXENV_STATUS_t	Status;
137 	uint16_t	ax;
138 	uint16_t	bx;
139 	uint16_t	dx;
140 	uint16_t	di;
141 	uint16_t	es;
142 } PACKED t_PXENV_START_UNDI;
143 
144 #define	PXENV_UNDI_STARTUP		0x0001
145 typedef struct {
146 	PXENV_STATUS_t	Status;
147 } PACKED t_PXENV_UNDI_STARTUP;
148 
149 #define	PXENV_UNDI_CLEANUP		0x0002
150 typedef struct {
151 	PXENV_STATUS_t	Status;
152 } PACKED t_PXENV_UNDI_CLEANUP;
153 
154 #define	PXENV_UNDI_INITIALIZE		0x0003
155 typedef struct {
156 	PXENV_STATUS_t	Status;
157 	ADDR32_t	ProtocolIni;	/* Phys addr of a copy of the driver module */
158 	uint8_t		reserved[8];
159 } PACKED t_PXENV_UNDI_INITIALIZE;
160 
161 
162 #define	MAXNUM_MCADDR		8
163 typedef struct {
164 	uint16_t	MCastAddrCount;
165 	MAC_ADDR	McastAddr[MAXNUM_MCADDR];
166 } PACKED t_PXENV_UNDI_MCAST_ADDRESS;
167 
168 #define	PXENV_UNDI_RESET_ADAPTER	0x0004
169 typedef struct {
170 	PXENV_STATUS_t	Status;
171 	t_PXENV_UNDI_MCAST_ADDRESS R_Mcast_Buf;
172 } PACKED t_PXENV_UNDI_RESET;
173 
174 #define	PXENV_UNDI_SHUTDOWN		0x0005
175 typedef struct {
176 	PXENV_STATUS_t	Status;
177 } PACKED t_PXENV_UNDI_SHUTDOWN;
178 
179 #define	PXENV_UNDI_OPEN			0x0006
180 typedef struct {
181 	PXENV_STATUS_t	Status;
182 	uint16_t	OpenFlag;
183 	uint16_t	PktFilter;
184 #	define FLTR_DIRECTED	0x0001
185 #	define FLTR_BRDCST	0x0002
186 #	define FLTR_PRMSCS	0x0003
187 #	define FLTR_SRC_RTG	0x0004
188 
189 	t_PXENV_UNDI_MCAST_ADDRESS R_Mcast_Buf;
190 } PACKED t_PXENV_UNDI_OPEN;
191 
192 #define	PXENV_UNDI_CLOSE		0x0007
193 typedef struct {
194 	PXENV_STATUS_t	Status;
195 } PACKED t_PXENV_UNDI_CLOSE;
196 
197 #define	PXENV_UNDI_TRANSMIT		0x0008
198 typedef struct {
199 	PXENV_STATUS_t	Status;
200 	uint8_t		Protocol;
201 #	define P_UNKNOWN	0
202 #	define P_IP		1
203 #	define P_ARP		2
204 #	define P_RARP		3
205 
206 	uint8_t		XmitFlag;
207 #	define XMT_DESTADDR	0x0000
208 #	define XMT_BROADCAST	0x0001
209 
210 	SEGOFF16_t	DestAddr;
211 	SEGOFF16_t	TBD;
212 	uint32_t	Reserved[2];
213 } PACKED t_PXENV_UNDI_TRANSMIT;
214 
215 #define	MAX_DATA_BLKS		8
216 typedef struct {
217 	uint16_t	ImmedLength;
218 	SEGOFF16_t	Xmit;
219 	uint16_t	DataBlkCount;
220 	struct	DataBlk {
221 		uint8_t		TDPtrType;
222 		uint8_t		TDRsvdByte;
223 		uint16_t	TDDataLen;
224 		SEGOFF16_t	TDDataPtr;
225 	} DataBlock[MAX_DATA_BLKS];
226 } PACKED t_PXENV_UNDI_TBD;
227 
228 #define	PXENV_UNDI_SET_MCAST_ADDRESS	0x0009
229 typedef struct {
230 	PXENV_STATUS_t	Status;
231 	t_PXENV_UNDI_MCAST_ADDRESS R_Mcast_Buf;
232 } PACKED t_PXENV_UNDI_SET_MCAST_ADDR;
233 
234 #define	PXENV_UNDI_SET_STATION_ADDRESS	0x000A
235 typedef struct {
236 	PXENV_STATUS_t	Status;
237 	MAC_ADDR	StationAddress;		/* Temp MAC addres to use */
238 } PACKED t_PXENV_UNDI_SET_STATION_ADDRESS;
239 
240 #define	PXENV_UNDI_SET_PACKET_FILTER	0x000B
241 typedef struct {
242 	PXENV_STATUS_t	Status;
243 	uint8_t		filter;			/* see UNDI_OPEN (0x0006) */
244 } PACKED t_PXENV_UNDI_SET_PACKET_FILTER;
245 
246 #define	PXENV_UNDI_GET_INFORMATION	0x000C
247 typedef struct {
248 	PXENV_STATUS_t	Status;
249 	uint16_t	BaseIo;			/* Adapter base I/O address */
250 	uint16_t	IntNumber;		/* Adapter IRQ number */
251 	uint16_t	MaxTranUnit;		/* Adapter maximum transmit unit */
252 	uint16_t	HwType;			/* Type of protocol at the hardware addr */
253 #	define ETHER_TYPE	1
254 #	define EXP_ETHER_TYPE	2
255 #	define IEEE_TYPE	6
256 #	define ARCNET_TYPE	7
257 
258 	uint16_t	HwAddrLen;		/* Length of hardware address */
259 	MAC_ADDR	CurrentNodeAddress;	/* Current hardware address */
260 	MAC_ADDR	PermNodeAddress;	/* Permanent hardware address */
261 	SEGSEL_t	ROMAddress;		/* Real mode ROM segment address */
262 	uint16_t	RxBufCt;		/* Receive queue length */
263 	uint16_t	TxBufCt;		/* Transmit queue length */
264 } PACKED t_PXENV_UNDI_GET_INFORMATION;
265 
266 #define	PXENV_UNDI_GET_STATISTICS	0x000D
267 typedef struct {
268 	PXENV_STATUS_t	Status;
269 	uint32_t	XmitGoodFrames;		/* Number of successful transmissions */
270 	uint32_t	RcvGoodFrames;		/* Number of good frames received */
271 	uint32_t	RcvCRCErrors;		/* Number of frames with CRC errors */
272 	uint32_t	RcvResourceErrors;	/* Number of frames dropped */
273 } PACKED t_PXENV_UNDI_GET_STATISTICS;
274 
275 #define	PXENV_UNDI_CLEAR_STATISTICS	0x000E
276 typedef struct {
277 	PXENV_STATUS_t	Status;
278 } PACKED t_PXENV_UNDI_CLEAR_STATISTICS;
279 
280 #define	PXENV_UNDI_INITIATE_DIAGS	0x000F
281 typedef struct {
282 	PXENV_STATUS_t	Status;
283 } PACKED t_PXENV_UNDI_INITIATE_DIAGS;
284 
285 #define	PXENV_UNDI_FORCE_INTERRUPT	0x0010
286 typedef struct {
287 	PXENV_STATUS_t	Status;
288 } PACKED t_PXENV_UNDI_FORCE_INTERRUPT;
289 
290 #define	PXENV_UNDI_GET_MCAST_ADDRESS	0x0011
291 typedef struct {
292 	PXENV_STATUS_t	Status;
293 	IP4_t		InetAddr;		/* IP mulicast address */
294 	MAC_ADDR	MediaAddr;		/* MAC multicast address */
295 } PACKED t_PXENV_UNDI_GET_MCAST_ADDR;
296 
297 #define	PXENV_UNDI_GET_NIC_TYPE		0x0012
298 typedef struct {
299 	PXENV_STATUS_t	Status;
300 	uint8_t		NicType;		/* Type of NIC */
301 #	define PCI_NIC		2
302 #	define PnP_NIC		3
303 #	define CardBus_NIC	4
304 
305 	union {
306 		struct {
307 			uint16_t	Vendor_ID;
308 			uint16_t	Dev_ID;
309 			uint8_t		Base_Class;
310 			uint8_t		Sub_Class;
311 			uint8_t		Prog_Intf;
312 			uint8_t		Rev;
313 			uint16_t	BusDevFunc;
314 			uint16_t	SubVendor_ID;
315 			uint16_t	SubDevice_ID;
316 		} pci, cardbus;
317 		struct {
318 			uint32_t	EISA_Dev_ID;
319 			uint8_t		Base_Class;
320 			uint8_t		Sub_Class;
321 			uint8_t		Prog_Intf;
322 			uint16_t	CardSelNum;
323 		} pnp;
324 	} info;
325 } PACKED t_PXENV_UNDI_GET_NIC_TYPE;
326 
327 #define	PXENV_UNDI_GET_IFACE_INFO	0x0013
328 typedef struct {
329 	PXENV_STATUS_t	Status;
330 	uint8_t		IfaceType[16];		/* Name of MAC type in ASCII. */
331 	uint32_t	LinkSpeed;		/* Defined in NDIS 2.0 spec */
332 	uint32_t	ServiceFlags;		/* Defined in NDIS 2.0 spec */
333 	uint32_t	Reserved[4];		/* must be 0 */
334 } PACKED t_PXENV_UNDI_GET_IFACE_INFO;
335 
336 #define	PXENV_UNDI_ISR			0x0014
337 typedef struct {
338 	PXENV_STATUS_t	Status;
339 	uint16_t	FuncFlag;		/* PXENV_UNDI_ISR_OUT_xxx */
340 	uint16_t	BufferLength;		/* Length of Frame */
341 	uint16_t	FrameLength;		/* Total length of reciever frame */
342 	uint16_t	FrameHeaderLength;	/* Length of the media header in Frame */
343 	SEGOFF16_t	Frame;			/* receive buffer */
344 	uint8_t		ProtType;		/* Protocol type */
345 	uint8_t		PktType;		/* Packet Type */
346 #	define PXENV_UNDI_ISR_IN_START		1
347 #	define PXENV_UNDI_ISR_IN_PROCESS	2
348 #	define PXENV_UNDI_ISR_IN_GET_NEXT	3
349 
350 	/* one of these will be returned for PXENV_UNDI_ISR_IN_START */
351 #	define PXENV_UNDI_ISR_OUT_OURS		0
352 #	define PXENV_UNDI_ISR_OUT_NOT_OURS	1
353 
354 	/*
355 	 * one of these will bre returnd for PXEND_UNDI_ISR_IN_PROCESS
356 	 * and PXENV_UNDI_ISR_IN_GET_NEXT
357 	 */
358 #	define PXENV_UNDI_ISR_OUT_DONE		0
359 #	define PXENV_UNDI_ISR_OUT_TRANSMIT	2
360 #	define PXENV_UNDI_ISR_OUT_RECEIVE	3
361 #	define PXENV_UNDI_ISR_OUT_BUSY		4
362 } PACKED t_PXENV_UNDI_ISR;
363 
364 #define	PXENV_STOP_UNDI			0x0015
365 typedef struct {
366 	PXENV_STATUS_t	Status;
367 } PACKED t_PXENV_STOP_UNDI;
368 
369 #define	PXENV_TFTP_OPEN			0x0020
370 typedef struct {
371 	PXENV_STATUS_t	Status;
372 	IP4_t		ServerIPAddress;
373 	IP4_t		GatewayIPAddress;
374 	uint8_t		FileName[128];
375 	UDP_PORT_t	TFTPPort;
376 	uint16_t	PacketSize;
377 } PACKED t_PXENV_TFTP_OPEN;
378 
379 #define	PXENV_TFTP_CLOSE		0x0021
380 typedef struct {
381 	PXENV_STATUS_t	Status;
382 } PACKED t_PXENV_TFTP_CLOSE;
383 
384 #define	PXENV_TFTP_READ			0x0022
385 typedef struct {
386 	PXENV_STATUS_t	Status;
387 	uint16_t	PacketNumber;
388 	uint16_t	BufferSize;
389 	SEGOFF16_t	Buffer;
390 } PACKED t_PXENV_TFTP_READ;
391 
392 #define	PXENV_TFTP_READ_FILE		0x0023
393 typedef struct {
394 	PXENV_STATUS_t	Status;
395 	uint8_t		FileName[128];
396 	uint32_t	BufferSize;
397 	ADDR32_t	Buffer;
398 	IP4_t		ServerIPAddress;
399 	IP4_t		GatewayIPAdress;
400 	IP4_t		McastIPAdress;
401 	UDP_PORT_t	TFTPClntPort;
402 	UDP_PORT_t	TFTPSrvPort;
403 	uint16_t	TFTPOpenTimeOut;
404 	uint16_t	TFTPReopenDelay;
405 } PACKED t_PXENV_TFTP_READ_FILE;
406 
407 #define	PXENV_TFTP_GET_FSIZE		0x0025
408 typedef struct {
409 	PXENV_STATUS_t	Status;
410 	IP4_t		ServerIPAddress;
411 	IP4_t		GatewayIPAdress;
412 	uint8_t		FileName[128];
413 	uint32_t	FileSize;
414 } PACKED t_PXENV_TFTP_GET_FSIZE;
415 
416 #define	PXENV_UDP_OPEN			0x0030
417 typedef struct {
418 	PXENV_STATUS_t	Status;
419 	IP4_t		src_ip;		/* IP address of this station */
420 } PACKED t_PXENV_UDP_OPEN;
421 
422 #define	PXENV_UDP_CLOSE			0x0031
423 typedef struct {
424 	PXENV_STATUS_t	status;
425 } PACKED t_PXENV_UDP_CLOSE;
426 
427 #define	PXENV_UDP_READ			0x0032
428 typedef struct {
429 	PXENV_STATUS_t	status;
430 	IP4_t		src_ip;		/* IP of sender */
431 	IP4_t		dest_ip;	/* Only accept packets sent to this IP */
432 	UDP_PORT_t	s_port;		/* UDP source port of sender */
433 	UDP_PORT_t	d_port;		/* Only accept packets sent to this port */
434 	uint16_t	buffer_size;	/* Size of the packet buffer */
435 	SEGOFF16_t	buffer;		/* SEG:OFF to the packet buffer */
436 } PACKED t_PXENV_UDP_READ;
437 
438 #define	PXENV_UDP_WRITE			0x0033
439 typedef struct {
440 	PXENV_STATUS_t	status;
441 	IP4_t		ip;		/* dest ip addr */
442 	IP4_t		gw;		/* ip gateway */
443 	UDP_PORT_t	src_port;	/* source udp port */
444 	UDP_PORT_t	dst_port;	/* destination udp port */
445 	uint16_t	buffer_size;	/* Size of the packet buffer */
446 	SEGOFF16_t	buffer;		/* SEG:OFF to the packet buffer */
447 } PACKED t_PXENV_UDP_WRITE;
448 
449 #define	PXENV_UNLOAD_STACK		0x0070
450 typedef struct {
451 	PXENV_STATUS_t	Status;
452 	uint8_t		reserved[10];
453 } PACKED t_PXENV_UNLOAD_STACK;
454 
455 
456 #define	PXENV_GET_CACHED_INFO		0x0071
457 typedef struct {
458 	PXENV_STATUS_t	Status;
459 	uint16_t	PacketType;	/* type (defined right here) */
460 #	define PXENV_PACKET_TYPE_DHCP_DISCOVER  1
461 #	define PXENV_PACKET_TYPE_DHCP_ACK       2
462 #	define PXENV_PACKET_TYPE_BINL_REPLY     3
463 	uint16_t	BufferSize;	/* max to copy, leave at 0 for pointer */
464 	SEGOFF16_t	Buffer;		/* copy to, leave at 0 for pointer */
465 	uint16_t	BufferLimit;	/* max size of buffer in BC dataseg ? */
466 } PACKED t_PXENV_GET_CACHED_INFO;
467 
468 
469 /* structure filled in by PXENV_GET_CACHED_INFO
470  * (how we determine which IP we downloaded the initial bootstrap from)
471  * words can't describe...
472  */
473 typedef struct {
474 	uint8_t		opcode;
475 #	define BOOTP_REQ	1
476 #	define BOOTP_REP	2
477 	uint8_t		Hardware;	/* hardware type */
478 	uint8_t		Hardlen;	/* hardware addr len */
479 	uint8_t		Gatehops;	/* zero it */
480 	uint32_t	ident;		/* random number chosen by client */
481 	uint16_t	seconds;	/* seconds since did initial bootstrap */
482 	uint16_t	Flags;		/* seconds since did initial bootstrap */
483 #	define BOOTP_BCAST	0x8000		/* ? */
484 	IP4_t		cip;		/* Client IP */
485 	IP4_t		yip;		/* Your IP */
486 	IP4_t		sip;		/* IP to use for next boot stage */
487 	IP4_t		gip;		/* Relay IP ? */
488 	MAC_ADDR	CAddr;		/* Client hardware address */
489 	uint8_t		Sname[64];	/* Server's hostname (Optional) */
490 	uint8_t		bootfile[128];	/* boot filename */
491 	union {
492 #		if 1
493 #		define BOOTP_DHCPVEND  1024    /* DHCP extended vendor field size */
494 #		else
495 #		define BOOTP_DHCPVEND  312	/* DHCP standard vendor field size */
496 #		endif
497 		uint8_t		d[BOOTP_DHCPVEND];	/* raw array of vendor/dhcp options */
498 		struct {
499 			uint8_t		magic[4];	/* DHCP magic cookie */
500 #			ifndef		VM_RFC1048
501 #			define		VM_RFC1048	0x63825363L	/* ? */
502 #			endif
503 			uint32_t	flags;		/* bootp flags/opcodes */
504 			uint8_t		pad[56];	/* I don't think intel knows what a
505 							   union does... */
506 		} v;
507 	} vendor;
508 } PACKED BOOTPLAYER;
509 
510 #define	PXENV_RESTART_TFTP		0x0073
511 #define	t_PXENV_RESTART_TFTP		t_PXENV_TFTP_READ_FILE
512 
513 #define	PXENV_START_BASE		0x0075
514 typedef struct {
515 	PXENV_STATUS_t	Status;
516 } PACKED t_PXENV_START_BASE;
517 
518 #define	PXENV_STOP_BASE			0x0076
519 typedef struct {
520 	PXENV_STATUS_t	Status;
521 } PACKED t_PXENV_STOP_BASE;
522