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Added a function, prom_sd_target, to translate a PROM 

sd unit number into a SCSI target.  Now only set up our
g0 and g4 handlers inside prom_abort(), so we're not
normally running with them.
This commit is contained in:
fredette 2001-06-14 13:21:39 +00:00
parent edad0f956c
commit 15b02e5ba0
1 changed files with 42 additions and 2 deletions
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44
sys/arch/sun2/sun2/promlib.c
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@ -1,4 +1,4 @@
/* $NetBSD: promlib.c,v 1.3 2001/05/14 15:12:39 fredette Exp $ */
/* $NetBSD: promlib.c,v 1.4 2001/06/14 13:21:39 fredette Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
@ -47,7 +47,7 @@
#include <sun2/sun2/machdep.h>
#include <sun2/sun2/control.h>
#include <sun2/sun2/vector.h>
#include <sun68k/sun68k/vector.h>
#include <machine/pte.h>
/*
@ -251,6 +251,17 @@ prom_getbootfile()
return (sunmon_bootparam.fileName);
}
/* This maps a PROM `sd' unit number into a SCSI target. */
int
prom_sd_target(unit)
int unit;
{
switch(unit) {
case 2: return (4);
}
return (unit);
}
/*
* This aborts to the PROM, but should allow the user
* to "c" continue back into the kernel.
@ -258,8 +269,28 @@ prom_getbootfile()
void
prom_abort()
{
u_int16_t old_g0_g4_vectors[4], *vec, *store;
_mode_monitor(&sunmon_kernel_state, 1);
/*
* Set up our g0 and g4 handlers, by writing into
* the PROM's vector table directly. Note that
* the braw instruction displacement is PC-relative.
*/
#define BRAW 0x6000
vec = (u_int16_t *) sunmon_vbr;
store = old_g0_g4_vectors;
*(store++) = *vec;
*(vec++) = BRAW;
*(store++) = *vec;
*(vec++) = ((u_long) g0_entry) - ((u_long) vec);
*(store++) = *vec;
*(vec++) = BRAW;
*(store++) = *vec;
*(vec++) = ((u_long) g4_entry) - ((u_long) vec);
#undef BRAW
delay(100000);
/*
@ -270,6 +301,15 @@ prom_abort()
asm(" trap #14 ; _sunmon_continued: nop");
/* We have continued from a PROM abort! */
/* Put back the old g0 and g4 handlers. */
vec = (u_int16_t *) sunmon_vbr;
store = old_g0_g4_vectors;
*(vec++) = *(store++);
*(vec++) = *(store++);
*(vec++) = *(store++);
*(vec++) = *(store++);
_mode_kernel(&sunmon_kernel_state, 1);
}