1235154Savg/*- 2235154Savg * Copyright (c) 2012 Andriy Gapon <avg@FreeBSD.org> 3235154Savg * All rights reserved. 4235154Savg * 5235154Savg * Redistribution and use in source and binary forms are freely 6235154Savg * permitted provided that the above copyright notice and this 7235154Savg * paragraph and the following disclaimer are duplicated in all 8235154Savg * such forms. 9235154Savg * 10235154Savg * This software is provided "AS IS" and without any express or 11235154Savg * implied warranties, including, without limitation, the implied 12235154Savg * warranties of merchantability and fitness for a particular 13235154Savg * purpose. 14235154Savg * 15235154Savg * $FreeBSD$ 16235154Savg */ 17235154Savg 18235154Savg#ifndef _BOOT_I386_ARGS_H_ 19235154Savg#define _BOOT_I386_ARGS_H_ 20235154Savg 21235154Savg#define KARGS_FLAGS_CD 0x1 22235154Savg#define KARGS_FLAGS_PXE 0x2 23235154Savg#define KARGS_FLAGS_ZFS 0x4 24235154Savg#define KARGS_FLAGS_EXTARG 0x8 /* variably sized extended argument */ 25235154Savg 26235154Savg#define BOOTARGS_SIZE 24 /* sizeof(struct bootargs) */ 27235154Savg#define BA_BOOTFLAGS 8 /* offsetof(struct bootargs, bootflags) */ 28235154Savg#define BA_BOOTINFO 20 /* offsetof(struct bootargs, bootinfo) */ 29235154Savg#define BI_SIZE 48 /* offsetof(struct bootinfo, bi_size) */ 30235154Savg 31235154Savg/* 32235154Savg * We reserve some space above BTX allocated stack for the arguments 33235154Savg * and certain data that could hang off them. Currently only struct bootinfo 34235154Savg * is supported in that category. The bootinfo is placed at the top 35235154Savg * of the arguments area and the actual arguments are placed at ARGOFF offset 36235154Savg * from the top and grow towards the top. Hopefully we have enough space 37235154Savg * for bootinfo and the arguments to not run into each other. 38235154Savg * Arguments area below ARGOFF is reserved for future use. 39235154Savg */ 40235154Savg#define ARGSPACE 0x1000 /* total size of the BTX args area */ 41235154Savg#define ARGOFF 0x800 /* actual args offset within the args area */ 42235154Savg#define ARGADJ (ARGSPACE - ARGOFF) 43235154Savg 44235154Savg#ifndef __ASSEMBLER__ 45235154Savg 46235154Savgstruct bootargs 47235154Savg{ 48235154Savg uint32_t howto; 49235154Savg uint32_t bootdev; 50235154Savg uint32_t bootflags; 51235154Savg union { 52235154Savg struct { 53235154Savg uint32_t pxeinfo; 54235154Savg uint32_t reserved; 55235154Savg }; 56235154Savg uint64_t zfspool; 57235154Savg }; 58235154Savg uint32_t bootinfo; 59235154Savg 60235154Savg /* 61235154Savg * If KARGS_FLAGS_EXTARG is set in bootflags, then the above fields 62235154Savg * are followed by a uint32_t field that specifies a size of the 63235154Savg * extended arguments (including the size field). 64235154Savg */ 65235154Savg}; 66235154Savg 67235154Savg#endif /*__ASSEMBLER__*/ 68235154Savg 69235154Savg#endif /* !_BOOT_I386_ARGS_H_ */ 70