2 * BK Id: SCCS/s.iSeries_asm.h 1.4 10/15/01 20:29:24 paulus
5 * arch/ppc/kernel/iSeries_asm.h
7 * Definitions used by various bits of low-level assembly code on iSeries.
9 * Copyright (C) 2001 IBM Corp.
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 #define CHECKLPQUEUE(ra,rb,rc) \
18 mfspr rb,SPRG1; /* Get Paca address */\
19 lbz ra,PACALPPACA+LPPACAIPIINT(rb); /* Get IPI int flag */\
20 cmpi 0,ra,0; /* IPI occurred in hypervisor ? */\
21 bne 99f; /* If so, skip rest */\
22 lwz ra,PACALPQUEUE(rb); /* Get LpQueue address */\
23 cmpi 0,ra,0; /* Does LpQueue exist? */\
24 beq 99f; /* If not skip rest */\
25 lbz rb,LPQINUSEWORD(ra); /* Test for LpQueue recursion */\
26 cmpi 0,rb,1; /* If we are about to recurse */\
27 beq 99f; /* If so, skip rest */\
28 lwz rb,LPQCUREVENTPTR(ra); /* Get current LpEvent */\
29 lbz rb,LPEVENTFLAGS(rb); /* Get Valid bit */\
30 lbz rc,LPQOVERFLOW(ra); /* Get LpQueue overflow */\
31 andi. ra,rb,0x0080; /* Isolate Valid bit */\
32 or. ra,ra,rc; /* 0 == no pending events */\
35 #define CHECKDECR(ra,rb) \
36 mfspr rb,SPRG1; /* Get Paca address */\
37 lbz ra,PACALPPACA+LPPACADECRINT(rb); /* Get DECR int flag */\
38 cmpi 0,ra,0; /* DECR occurred in hypervisor ? */\
39 beq 99f; /* If not, skip rest */\
41 stb ra,PACALPPACA+LPPACADECRINT(rb); /* Clear DECR int flag */\
44 #define CHECKANYINT(ra,rb,rc) \
45 mfspr rb,SPRG1; /* Get Paca address */\
46 ld ra,PACALPPACA+LPPACAANYINT(rb); /* Get all interrupt flags */\
47 /* Note use of ld, protected by soft/hard disabled */\
48 cmpldi 0,ra,0; /* Any interrupt occurred while soft disabled? */\
49 bne 99f; /* If so, skip rest */\
50 lwz ra,PACALPQUEUE(rb); /* Get LpQueue address */\
51 cmpi 0,ra,0; /* Does LpQueue exist? */\
52 beq 99f; /* If not skip rest */\
53 lwz rb,LPQINUSEWORD(ra); /* Test for LpQueue recursion */\
54 cmpi 0,rb,1; /* If we are about to recurse */\
55 beq 99f; /* If so, skip rest */\
56 lwz rb,LPQCUREVENTPTR(ra); /* Get current LpEvent */\
57 lbz rb,LPEVENTFLAGS(rb); /* Get Valid bit */\
58 lbz rc,LPQOVERFLOW(ra); /* Get LpQueue overflow */\
59 andi. ra,rb,0x0080; /* Isolate Valid bit */\
60 or. ra,ra,rc; /* 0 == no pending events */\