diff options
Diffstat (limited to 'share/man/man8/man8.sparc64/boot_sparc64.8')
| -rw-r--r-- | share/man/man8/man8.sparc64/boot_sparc64.8 | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/share/man/man8/man8.sparc64/boot_sparc64.8 b/share/man/man8/man8.sparc64/boot_sparc64.8 index 0f34908f406..9705046704a 100644 --- a/share/man/man8/man8.sparc64/boot_sparc64.8 +++ b/share/man/man8/man8.sparc64/boot_sparc64.8 @@ -1,4 +1,4 @@ -.\" $OpenBSD: boot_sparc64.8,v 1.15 2014/11/27 14:57:36 schwarze Exp $ +.\" $OpenBSD: boot_sparc64.8,v 1.16 2015/10/03 13:22:06 stsp Exp $ .\" .\" Copyright (c) 1992, 1993 .\" The Regents of the University of California. All rights reserved. @@ -29,7 +29,7 @@ .\" .\" @(#)boot_sparc.8 8.2 (Berkeley) 4/19/94 .\" -.Dd $Mdocdate: November 27 2014 $ +.Dd $Mdocdate: October 3 2015 $ .Dt BOOT_SPARC64 8 sparc64 .Os .Sh NAME @@ -44,9 +44,32 @@ or the PROM will proceed to its initialization, and will boot an operating system if autoboot is enabled. .Ss Boot process description -System boot blocks are installed near the start of the boot disk -using the procedure described in -.Xr installboot 8 . +The sparc64 boot process is split into two parts: a small first-stage bootblock +that is written into the superblock area of a partition +.Po +and hence is limited in size to SBSIZE - DEV_BSIZE bytes +.Pc , +and a second-stage boot program that resides in the filesystem proper. +The first-stage bootblock is loaded into memory by the PROM. +After it receives control, it loads the second-stage boot program +.Sy ofwboot +from the filesystem. +The second-stage boot program uses the device driver interface to +the PROM and the stand-alone filesystem code in +.Pa libsa.a +to locate and load the kernel. +The first-stage bootblock and second-stage boot program can be found in +.Pa /usr/mdec/bootblk +and +.Pa /usr/mdec/ofwboot +respectively. +The second-stage boot program commonly resides in the root directory as +.Pa /ofwboot . +.Pp +System boot blocks are installed using +.Xr installboot 8 , +which prepares an FFS filesystem partition for boot-strapping from the PROM. +.Pp The boot program attempts to load the kernel from the selected boot device, which must currently be an SCSI .Pq Pa sd |