87 lines
3.3 KiB
C
87 lines
3.3 KiB
C
/* $FreeBSD$ */
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/*
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* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* The boot program passes a pointer (in the boot environment virtual
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* address address space; "BEVA") to a bootinfo to the kernel using
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* the following convention:
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*
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* a0 contains first free page frame number
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* a1 contains page number of current level 1 page table
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* if a2 contains BOOTINFO_MAGIC and a4 is nonzero:
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* a3 contains pointer (BEVA) to bootinfo
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* a4 contains bootinfo version number
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* if a2 contains BOOTINFO_MAGIC and a4 contains 0 (backward compat):
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* a3 contains pointer (BEVA) to bootinfo version
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* (u_long), then the bootinfo
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*/
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#define BOOTINFO_MAGIC 0xdeadbeeffeedface
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struct bootinfo_v1 {
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u_long ssym; /* 0: start of kernel sym table */
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u_long esym; /* 8: end of kernel sym table */
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char boot_flags[64]; /* 16: boot flags */
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char booted_kernel[64]; /* 80: name of booted kernel */
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void *hwrpb; /* 144: hwrpb pointer (BEVA) */
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u_long hwrpbsize; /* 152: size of hwrpb data */
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int (*cngetc)(void); /* 160: console getc pointer */
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void (*cnputc)(int); /* 168: console putc pointer */
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void (*cnpollc)(int); /* 176: console pollc pointer */
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u_long pad[6]; /* 184: rsvd for future use */
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char *envp; /* 232: start of environment */
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u_long kernend; /* 240: end of kernel */
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u_long modptr; /* 248: FreeBSD module base */
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/* 256: total size */
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};
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/*
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* Kernel-internal structure used to hold important bits of boot
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* information. NOT to be used by boot blocks.
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*
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* Note that not all of the fields from the bootinfo struct(s)
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* passed by the boot blocks aren't here (because they're not currently
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* used by the kernel!). Fields here which aren't supplied by the
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* bootinfo structure passed by the boot blocks are supposed to be
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* filled in at startup with sane contents.
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*/
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struct bootinfo_kernel {
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u_long ssym; /* start of syms */
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u_long esym; /* end of syms */
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u_long modptr; /* FreeBSD module pointer */
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u_long kernend; /* "end of kernel" from boot code */
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char *envp; /* "end of kernel" from boot code */
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u_long hwrpb_phys; /* hwrpb physical address */
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u_long hwrpb_size; /* size of hwrpb data */
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char boot_flags[64]; /* boot flags */
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char booted_kernel[64]; /* name of booted kernel */
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char booted_dev[64]; /* name of booted device */
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};
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extern struct bootinfo_kernel bootinfo;
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