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Add hatching code for other CPUs.

This commit is contained in:
pk 1998-09-12 19:44:17 +00:00
parent dfc0d8e7d5
commit 8b7ee2cd89
1 changed files with 47 additions and 1 deletions
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48
sys/arch/sparc/sparc/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.88 1998/09/09 00:07:55 thorpej Exp $ */
/* $NetBSD: locore.s,v 1.89 1998/09/12 19:44:17 pk Exp $ */
/*
* Copyright (c) 1996 Paul Kranenburg
@ -3783,6 +3783,52 @@ Lgandul: nop
clr %o0 ! our frame arg is ignored
/*NOTREACHED*/
/*
* Entry point for non-boot CPUs in MP systems.
*/
.globl _cpu_hatch
_cpu_hatch:
rd %psr, %g3 ! paranoia: make sure ...
andn %g3, PSR_ET, %g3 ! we have traps off
wr %g3, 0, %psr ! so that we can fiddle safely
nop; nop; nop
wr %g0, 0, %wim ! make sure we can set psr
nop; nop; nop
wr %g0, PSR_S|PSR_PS|PSR_PIL, %psr ! set initial psr
nop; nop; nop
wr %g0, 2, %wim ! set initial %wim (w1 invalid)
/* Initialize Trap Base register */
sethi %hi(_trapbase), %o0
ld [%o0+%lo(_trapbase)], %g6
wr %g6, 0, %tbr
nop; nop; nop ! paranoia
/* Set up a stack */
set USRSTACK - CCFSZ, %fp ! as if called from user code
sethi %hi(_cpu_hatchstack), %o0
ld [%o0+%lo(_cpu_hatchstack)], %o0
set USPACE - CCFSZ - 80, %sp ! XXX - stack length
add %o0, %sp, %sp
/* Enable traps */
rd %psr, %l0
wr %l0, PSR_ET, %psr
nop; nop; nop
/* Call C code */
sethi %hi(_cpu_hatch_sc), %o0
call _cpu_setup
ld [%o0+%lo(_cpu_hatch_sc)], %o0
/* Idle here .. */
9: ba 9b
nop
/*NOTREACHED*/
/*
* The following code is copied to the top of the user stack when each