1 /* 2 * @(#)kdbreg.h 7.1 (Berkeley) 05/14/88 3 */ 4 /* 5 * The KDB50 registers are embedded inside the bi interface 6 * general-purpose registers. 7 */ 8 struct kdb_regs { 9 struct biiregs kdb_bi; 10 short kdb_xxx; /* first half of GPR 0 unused */ 11 short kdb_ip; /* initialisation and polling */ 12 short kdb_sa; /* status & address (r/o half) */ 13 short kdb_sw; /* status & address (w/o half) */ 14 }; 15 16 /* 17 * Bits in KDB status register during initialisation 18 */ 19 #define KDB_ERR 0x8000 /* error */ 20 #define KDB_STEP4 0x4000 /* step 4 has started */ 21 #define KDB_STEP3 0x2000 /* step 3 has started */ 22 #define KDB_STEP2 0x1000 /* step 2 has started */ 23 #define KDB_STEP1 0x0800 /* step 1 has started */ 24 #define KDB_DI 0x0100 /* controller implements diagnostics */ 25 #define KDB_IE 0x0080 /* interrupt enable */ 26 #define KDB_NCNRMASK 0x003f /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */ 27 #define KDB_IVECMASK 0x007f /* in STEP2, bits 0-6 are interruptvec / 4 */ 28 29 /* after initialisation: */ 30 #define KDB_GO 0x0001 /* run */ 31 32 #define KDBSR_BITS \ 33 "\20\20ERR\17STEP4\16STEP3\15STEP2\14STEP1\13oldNV\12oldQB\11DI\10IE\1GO" 34 35 /* 36 * KDB Communications Area. Note that this structure definition 37 * requires NRSP and NCMD to be defined already. 38 */ 39 struct kdbca { 40 short ca_xxx1; /* unused */ 41 char ca_xxx2; /* unused */ 42 char ca_bdp; /* BDP to purge XXX */ 43 short ca_cmdint; /* command ring transition flag */ 44 short ca_rspint; /* response ring transition flag */ 45 long ca_rspdsc[NRSP];/* response descriptors */ 46 long ca_cmddsc[NCMD];/* command descriptors */ 47 }; 48 49 /* 50 * Simplified routines (crash dump) use one command and one response. 51 */ 52 struct kdb1ca { 53 long ca_xxx; 54 short ca_cmdint; 55 short ca_rspint; 56 long ca_rspdsc; 57 long ca_cmddsc; 58 }; 59 60 /* 61 * Asserting KDB_MAP in values placed in mscp_seq.seq_buffer tells 62 * the KDB to use mscp_seq.seq_mapbase as a set of PTEs and seq_buffer 63 * as an offset value. Hence we need no mappings; the KDB50 reads 64 * the hardware page tables directly. (Without KDB_MAP, seq_bufer 65 * represents the physical memory address instead, and seq_mapbase is 66 * unused.) 67 */ 68 #define KDB_MAP 0x80000000 69 #define KDB_PHYS 0 /* pseudo flag */ 70 71 /* 72 * KDB statistics. 73 */ 74 #define KS_MAXC 32 75 76 struct kdbstats { 77 int ks_sys; /* transfers done from Sysmap */ 78 int ks_paget; /* transfers done from Usrptmap */ 79 int ks_contig; /* transfers done from contiguous user map */ 80 int ks_copies; /* transfers done from pte copies */ 81 int ks_mapwait; /* number of out-of-map waits */ 82 int ks_cmd[KS_MAXC];/* commands started at once */ 83 int ks_inval; /* copies due to !PG_V */ 84 }; 85