1 /* 2 * Copyright (c) 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)kdbreg.h 7.3 (Berkeley) 06/28/90 11 */ 12 13 /* 14 * The KDB50 registers are embedded inside the bi interface 15 * general-purpose registers. 16 */ 17 struct kdb_regs { 18 struct biiregs kdb_bi; 19 short kdb_xxx; /* first half of GPR 0 unused */ 20 short kdb_ip; /* initialisation and polling */ 21 short kdb_sa; /* status & address (r/o half) */ 22 short kdb_sw; /* status & address (w/o half) */ 23 }; 24 25 /* 26 * Bits in KDB status register during initialisation 27 */ 28 #define KDB_ERR 0x8000 /* error */ 29 #define KDB_STEP4 0x4000 /* step 4 has started */ 30 #define KDB_STEP3 0x2000 /* step 3 has started */ 31 #define KDB_STEP2 0x1000 /* step 2 has started */ 32 #define KDB_STEP1 0x0800 /* step 1 has started */ 33 #define KDB_DI 0x0100 /* controller implements diagnostics */ 34 #define KDB_IE 0x0080 /* interrupt enable */ 35 #define KDB_NCNRMASK 0x003f /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */ 36 #define KDB_IVECMASK 0x007f /* in STEP2, bits 0-6 are interruptvec / 4 */ 37 38 /* after initialisation: */ 39 #define KDB_GO 0x0001 /* run */ 40 41 #define KDBSR_BITS \ 42 "\20\20ERR\17STEP4\16STEP3\15STEP2\14STEP1\13oldNV\12oldQB\11DI\10IE\1GO" 43 44 /* 45 * KDB Communications Area. Note that this structure definition 46 * requires NRSP and NCMD to be defined already. 47 */ 48 struct kdbca { 49 short ca_xxx1; /* unused */ 50 char ca_xxx2; /* unused */ 51 char ca_bdp; /* BDP to purge XXX */ 52 short ca_cmdint; /* command ring transition flag */ 53 short ca_rspint; /* response ring transition flag */ 54 long ca_rspdsc[NRSP];/* response descriptors */ 55 long ca_cmddsc[NCMD];/* command descriptors */ 56 }; 57 58 /* 59 * Simplified routines (crash dump) use one command and one response. 60 */ 61 struct kdb1ca { 62 long ca_xxx; 63 short ca_cmdint; 64 short ca_rspint; 65 long ca_rspdsc; 66 long ca_cmddsc; 67 }; 68 69 /* 70 * Asserting KDB_MAP in values placed in mscp_seq.seq_buffer tells 71 * the KDB to use mscp_seq.seq_mapbase as a set of PTEs and seq_buffer 72 * as an offset value. Hence we need no mappings; the KDB50 reads 73 * the hardware page tables directly. (Without KDB_MAP, seq_bufer 74 * represents the physical memory address instead, and seq_mapbase is 75 * unused.) 76 */ 77 #define KDB_MAP 0x80000000 78 #define KDB_PHYS 0 /* pseudo flag */ 79 80 /* 81 * KDB statistics. 82 */ 83 #define KS_MAXC 32 84 85 struct kdbstats { 86 int ks_sys; /* transfers done from Sysmap */ 87 int ks_paget; /* transfers done from Usrptmap */ 88 int ks_contig; /* transfers done from contiguous user map */ 89 int ks_copies; /* transfers done from pte copies */ 90 int ks_mapwait; /* number of out-of-map waits */ 91 int ks_cmd[KS_MAXC];/* commands started at once */ 92 int ks_inval; /* copies due to !PG_V */ 93 }; 94