mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-30 12:04:07 +00:00
119 lines
2.8 KiB
ArmAsm
119 lines
2.8 KiB
ArmAsm
/*
|
|
* $FreeBSD$
|
|
* From: $NetBSD: prom_disp.S,v 1.2 1997/04/06 08:41:00 cgd Exp $
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: Chris G. Demetriou
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and
|
|
* its documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
|
|
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*/
|
|
|
|
#ifndef _LOCORE
|
|
#define ASSEMBLER
|
|
#include <machine/asm.h>
|
|
#include <machine/prom.h>
|
|
#include <machine/rpb.h>
|
|
#endif
|
|
|
|
.globl prom_dispatch_v
|
|
.comm prom_dispatch_v,16
|
|
|
|
.text
|
|
.align 4
|
|
|
|
/*
|
|
* Dispatcher routine. Implements prom's calling machinery, saves our
|
|
* callee-saved registers as required by C.
|
|
*/
|
|
#define D_RA (7*8)
|
|
#define D_S0 (8*8)
|
|
#define D_S1 (9*8)
|
|
#define D_S2 (10*8)
|
|
#define D_S3 (11*8)
|
|
#define D_S4 (12*8)
|
|
#define D_S5 (13*8)
|
|
#define D_S6 (14*8)
|
|
#define DISPATCH_FRAME_SIZE (15*8)
|
|
#define DISPATCH_REGS IM_RA|IM_S0|IM_S1|IM_S2|IM_S3|IM_S4|IM_S5|IM_S6
|
|
|
|
NESTED(prom_dispatch, 5, DISPATCH_FRAME_SIZE, ra, DISPATCH_REGS, 0)
|
|
LDGP(pv)
|
|
|
|
lda sp, -DISPATCH_FRAME_SIZE(sp)
|
|
stq ra, D_RA(sp)
|
|
stq s0, D_S0(sp)
|
|
stq s1, D_S1(sp)
|
|
stq s2, D_S2(sp)
|
|
stq s3, D_S3(sp)
|
|
stq s4, D_S4(sp)
|
|
stq s5, D_S5(sp)
|
|
stq s6, D_S6(sp)
|
|
|
|
/* Lord have mercy because.. I would not. */
|
|
/* #define STUPID_PROM_IS_32_BITS */
|
|
#ifdef STUPID_PROM_IS_32_BITS
|
|
ldah s0, 0x2000(zero) /* hack for hack */
|
|
lda s0, (0x2000-8)(s0)
|
|
|
|
stq sp, 0(s0)
|
|
or s0, zero, sp
|
|
#endif /* STUPID_PROM_IS_32_BITS */
|
|
|
|
lda pv, prom_dispatch_v
|
|
ldq v0, 0(pv) /* routine */
|
|
ldq pv, 8(pv) /* routine_arg */
|
|
|
|
jsr ra, (v0)
|
|
|
|
#ifdef STUPID_PROM_IS_32_BITS
|
|
ldah s0, 0x2000(zero) /* hack for hack */
|
|
lda s0, (0x2000-8)(s0)
|
|
|
|
ldq sp, 0(s0)
|
|
#endif /* STUPID_PROM_IS_32_BITS */
|
|
|
|
ldq ra, D_RA(sp)
|
|
ldq s0, D_S0(sp)
|
|
ldq s1, D_S1(sp)
|
|
ldq s2, D_S2(sp)
|
|
ldq s3, D_S3(sp)
|
|
ldq s4, D_S4(sp)
|
|
ldq s5, D_S5(sp)
|
|
ldq s6, D_S6(sp)
|
|
lda sp, DISPATCH_FRAME_SIZE(sp)
|
|
RET
|
|
END(prom_dispatch)
|
|
|
|
#undef D_RA
|
|
#undef D_S0
|
|
#undef D_S1
|
|
#undef D_S2
|
|
#undef D_S3
|
|
#undef D_S4
|
|
#undef D_S5
|
|
#undef D_S6
|
|
#undef DISPATCH_FRAME_SIZE
|
|
#undef DISPATCH_REGS
|