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Check OBP magic: if no match then assume an Openfirmware PROM.

This commit is contained in:
pk 1999-02-14 12:33:55 +00:00
parent 1e5bf77774
commit a8456f4e8a
1 changed files with 15 additions and 4 deletions
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19
sys/arch/sparc/sparc/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.108 1998/11/26 22:36:43 mycroft Exp $ */ /* $NetBSD: locore.s,v 1.109 1999/02/14 12:33:55 pk Exp $ */
/* /*
* Copyright (c) 1996 Paul Kranenburg * Copyright (c) 1996 Paul Kranenburg
@ -3437,6 +3437,13 @@ dostart:
#if defined(SUN4C) || defined(SUN4M) #if defined(SUN4C) || defined(SUN4M)
mov %o0, %g7 ! save prom vector pointer mov %o0, %g7 ! save prom vector pointer
/* First, check `romp->pv_magic' */
ld [%g7 + PV_MAGIC], %o0 ! v = pv->pv_magic
set OBP_MAGIC, %o1
cmp %o0, %o1 ! if ( v != OBP_MAGIC) {
bne is_openfirm ! assume this is an OPENFIRM machine
nop ! }
/* /*
* are we on a sun4c or a sun4m? * are we on a sun4c or a sun4m?
*/ */
@ -3467,6 +3474,10 @@ dostart:
call %o1 call %o1
nop nop
is_openfirm:
mov %o3, %g7 ! OPENFIRMWARE entry point is in %o3
/* FALLTHROUGH to sun4m case */
is_sun4m: is_sun4m:
#if defined(SUN4M) #if defined(SUN4M)
set trapbase_sun4m, %g6 set trapbase_sun4m, %g6
@ -3787,8 +3798,8 @@ startmap_done:
* (which we just zeroed). * (which we just zeroed).
* This depends on the fact that bzero does not use %g7. * This depends on the fact that bzero does not use %g7.
*/ */
sethi %hi(_promvec), %l0 sethi %hi(_romp), %l0
st %g7, [%l0 + %lo(_promvec)] st %g7, [%l0 + %lo(_romp)]
/* /*
* Step 3: compute number of windows and set up tables. * Step 3: compute number of windows and set up tables.
@ -6266,6 +6277,6 @@ _intrcnt:
_eintrcnt: _eintrcnt:
.comm _nwindows, 4 .comm _nwindows, 4
.comm _promvec, 4 .comm _romp, 4
.comm _qs, 32 * 8 .comm _qs, 32 * 8
.comm _whichqs, 4 .comm _whichqs, 4