17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
51ae08745Sheppo * Common Development and Distribution License (the "License").
61ae08745Sheppo * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
211ae08745Sheppo
227c478bd9Sstevel@tonic-gate /*
23*ae115bc7Smrj * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
287c478bd9Sstevel@tonic-gate
297c478bd9Sstevel@tonic-gate /*
307c478bd9Sstevel@tonic-gate * The debugger/PROM interface layer - debugger activation
317c478bd9Sstevel@tonic-gate */
327c478bd9Sstevel@tonic-gate
337c478bd9Sstevel@tonic-gate #include <kmdb/kmdb_promif_isadep.h>
347c478bd9Sstevel@tonic-gate #include <kmdb/kmdb_start.h>
357c478bd9Sstevel@tonic-gate #include <kmdb/kmdb_kdi.h>
367c478bd9Sstevel@tonic-gate #include <kmdb/kmdb_asmutil.h>
377c478bd9Sstevel@tonic-gate #include <kmdb/kaif.h>
387c478bd9Sstevel@tonic-gate #include <mdb/mdb_debug.h>
397c478bd9Sstevel@tonic-gate #include <mdb/mdb_kreg.h>
407c478bd9Sstevel@tonic-gate
417c478bd9Sstevel@tonic-gate #include <sys/cpuvar.h>
427c478bd9Sstevel@tonic-gate #include <sys/kdi_impl.h>
437c478bd9Sstevel@tonic-gate #include <sys/machtrap.h>
447c478bd9Sstevel@tonic-gate
457c478bd9Sstevel@tonic-gate kaif_cpusave_t kaif_cb_save;
467c478bd9Sstevel@tonic-gate
477c478bd9Sstevel@tonic-gate static const char kaif_defer_word_tmpl[] =
487c478bd9Sstevel@tonic-gate /* 1 */ ": kmdb_callback "
497c478bd9Sstevel@tonic-gate
507c478bd9Sstevel@tonic-gate /*
517c478bd9Sstevel@tonic-gate * Don't hand control to the debugger if we're coming from OBP's text.
527c478bd9Sstevel@tonic-gate */
537c478bd9Sstevel@tonic-gate
547c478bd9Sstevel@tonic-gate /* 2 */ " %%pc f000.0000 ffff.ffff between if exit then "
557c478bd9Sstevel@tonic-gate
567c478bd9Sstevel@tonic-gate /*
577c478bd9Sstevel@tonic-gate * Save registers
587c478bd9Sstevel@tonic-gate */
597c478bd9Sstevel@tonic-gate
607c478bd9Sstevel@tonic-gate /* 3 */ " %%pc h# %x x! "
617c478bd9Sstevel@tonic-gate /* 4 */ " %%npc h# %x x! "
627c478bd9Sstevel@tonic-gate /* 5 */ " %%g1 h# %x x! "
637c478bd9Sstevel@tonic-gate /* 6 */ " %%g2 h# %x x! "
647c478bd9Sstevel@tonic-gate /* 7 */ " %%g3 h# %x x! "
657c478bd9Sstevel@tonic-gate /* 8 */ " %%g4 h# %x x! "
667c478bd9Sstevel@tonic-gate /* 9 */ " %%g5 h# %x x! "
677c478bd9Sstevel@tonic-gate /* 10 */ " %%g6 h# %x x! "
687c478bd9Sstevel@tonic-gate /* 11 */ " %%g7 h# %x x! "
697c478bd9Sstevel@tonic-gate /* 12 */ " 1 %%tstate h# %x x! "
707c478bd9Sstevel@tonic-gate /* 13 */ " 1 %%tt h# %x x! "
717c478bd9Sstevel@tonic-gate /* 14 */ " %%tba h# %x x! "
727c478bd9Sstevel@tonic-gate /* 15 */ " h# %x set-pc "
737c478bd9Sstevel@tonic-gate /* 16 */ " go "
747c478bd9Sstevel@tonic-gate /* 17 */ "; ";
757c478bd9Sstevel@tonic-gate
767c478bd9Sstevel@tonic-gate /*
777c478bd9Sstevel@tonic-gate * Format the Forth word which tells the prom how to save state for
787c478bd9Sstevel@tonic-gate * giving control to us.
797c478bd9Sstevel@tonic-gate */
807c478bd9Sstevel@tonic-gate static char *
kaif_format_word(void)817c478bd9Sstevel@tonic-gate kaif_format_word(void)
827c478bd9Sstevel@tonic-gate {
837c478bd9Sstevel@tonic-gate static char prom_str[550];
847c478bd9Sstevel@tonic-gate kreg_t *kregs = kaif_cb_save.krs_gregs.kregs;
857c478bd9Sstevel@tonic-gate int len;
867c478bd9Sstevel@tonic-gate
877c478bd9Sstevel@tonic-gate len = mdb_snprintf(prom_str, sizeof (prom_str), kaif_defer_word_tmpl,
887c478bd9Sstevel@tonic-gate &kregs[KREG_PC], /* 3 */
897c478bd9Sstevel@tonic-gate &kregs[KREG_NPC], /* 4 */
907c478bd9Sstevel@tonic-gate &kregs[KREG_G1], /* 5 */
917c478bd9Sstevel@tonic-gate &kregs[KREG_G2], /* 6 */
927c478bd9Sstevel@tonic-gate &kregs[KREG_G3], /* 7 */
937c478bd9Sstevel@tonic-gate &kregs[KREG_G4], /* 8 */
947c478bd9Sstevel@tonic-gate &kregs[KREG_G5], /* 9 */
957c478bd9Sstevel@tonic-gate &kregs[KREG_G6], /* 10 */
967c478bd9Sstevel@tonic-gate &kregs[KREG_G7], /* 11 */
977c478bd9Sstevel@tonic-gate &kaif_cb_save.krs_tstate, /* 12 */
987c478bd9Sstevel@tonic-gate &kregs[KREG_TT], /* 13 */
997c478bd9Sstevel@tonic-gate &kregs[KREG_TBA], /* 14 */
1007c478bd9Sstevel@tonic-gate kaif_trap_obp); /* 15 */
1017c478bd9Sstevel@tonic-gate
1027c478bd9Sstevel@tonic-gate ASSERT(len <= sizeof (prom_str));
1037c478bd9Sstevel@tonic-gate
1047c478bd9Sstevel@tonic-gate return (prom_str);
1057c478bd9Sstevel@tonic-gate }
1067c478bd9Sstevel@tonic-gate
1077c478bd9Sstevel@tonic-gate static void
kaif_prom_install(void)1087c478bd9Sstevel@tonic-gate kaif_prom_install(void)
1097c478bd9Sstevel@tonic-gate {
1107c478bd9Sstevel@tonic-gate kmdb_prom_interpret(kaif_format_word());
1117c478bd9Sstevel@tonic-gate kmdb_prom_interpret(" ['] kmdb_callback init-debugger-hook ");
1127c478bd9Sstevel@tonic-gate }
1137c478bd9Sstevel@tonic-gate
1147c478bd9Sstevel@tonic-gate void
kaif_prom_rearm(void)1157c478bd9Sstevel@tonic-gate kaif_prom_rearm(void)
1167c478bd9Sstevel@tonic-gate {
1177c478bd9Sstevel@tonic-gate kmdb_prom_interpret(" ['] kmdb_callback is debugger-hook ");
1187c478bd9Sstevel@tonic-gate }
1197c478bd9Sstevel@tonic-gate
1207c478bd9Sstevel@tonic-gate /*ARGSUSED*/
1217c478bd9Sstevel@tonic-gate static void
kaif_cpu_init(cpu_t * cp)1227c478bd9Sstevel@tonic-gate kaif_cpu_init(cpu_t *cp)
1237c478bd9Sstevel@tonic-gate {
1247c478bd9Sstevel@tonic-gate kaif_wapt_set_regs();
1257c478bd9Sstevel@tonic-gate }
1267c478bd9Sstevel@tonic-gate
1277c478bd9Sstevel@tonic-gate /*ARGSUSED*/
1287c478bd9Sstevel@tonic-gate static void
kaif_install_generic(caddr_t tgt,caddr_t arg)1297c478bd9Sstevel@tonic-gate kaif_install_generic(caddr_t tgt, caddr_t arg)
1307c478bd9Sstevel@tonic-gate {
1317c478bd9Sstevel@tonic-gate bcopy((caddr_t)kaif_hdlr_generic, tgt, 32);
1327c478bd9Sstevel@tonic-gate }
1337c478bd9Sstevel@tonic-gate
1341ae08745Sheppo #ifdef sun4v
1351ae08745Sheppo
1361ae08745Sheppo /*ARGSUSED*/
1371ae08745Sheppo static void
kaif_install_goto_tt64(caddr_t tgt,caddr_t arg)1381ae08745Sheppo kaif_install_goto_tt64(caddr_t tgt, caddr_t arg)
1391ae08745Sheppo {
1401ae08745Sheppo /* LINTED - pointer alignment */
1411ae08745Sheppo uint32_t *hdlr = (uint32_t *)tgt;
1421ae08745Sheppo uint32_t disp = (T_FAST_INSTR_MMU_MISS - T_INSTR_MMU_MISS) * 0x20;
1431ae08745Sheppo
1441ae08745Sheppo *hdlr++ = 0x10480000 | (disp >> 2); /* ba,pt (to tt64) */
1451ae08745Sheppo *hdlr++ = 0x01000000; /* nop */
1461ae08745Sheppo }
1471ae08745Sheppo
1481ae08745Sheppo /*ARGSUSED*/
1491ae08745Sheppo static void
kaif_install_goto_tt68(caddr_t tgt,caddr_t arg)1501ae08745Sheppo kaif_install_goto_tt68(caddr_t tgt, caddr_t arg)
1511ae08745Sheppo {
1521ae08745Sheppo /* LINTED - pointer alignment */
1531ae08745Sheppo uint32_t *hdlr = (uint32_t *)tgt;
1541ae08745Sheppo uint32_t disp = (T_FAST_DATA_MMU_MISS - T_DATA_MMU_MISS) * 0x20;
1551ae08745Sheppo
1561ae08745Sheppo *hdlr++ = 0x10480000 | (disp >> 2); /* ba,pt (to tt68) */
1571ae08745Sheppo *hdlr++ = 0x01000000; /* nop */
1581ae08745Sheppo }
1591ae08745Sheppo
1601ae08745Sheppo #endif /* sun4v */
1611ae08745Sheppo
1627c478bd9Sstevel@tonic-gate static void
kaif_install_dmmumiss(caddr_t tgt,caddr_t vatotte)1637c478bd9Sstevel@tonic-gate kaif_install_dmmumiss(caddr_t tgt, caddr_t vatotte)
1647c478bd9Sstevel@tonic-gate {
1657c478bd9Sstevel@tonic-gate uint32_t *patch;
1667c478bd9Sstevel@tonic-gate
1677c478bd9Sstevel@tonic-gate bcopy((caddr_t)kaif_hdlr_dmiss, tgt, 128);
1687c478bd9Sstevel@tonic-gate
1697c478bd9Sstevel@tonic-gate /* LINTED - pointer alignment */
1707c478bd9Sstevel@tonic-gate patch = (uint32_t *)(tgt + ((uintptr_t)&kaif_hdlr_dmiss_patch -
1717c478bd9Sstevel@tonic-gate (uintptr_t)kaif_hdlr_dmiss));
1727c478bd9Sstevel@tonic-gate *patch++ |= (uintptr_t)vatotte >> 10;
1737c478bd9Sstevel@tonic-gate *patch |= ((uintptr_t)vatotte) & 0x3ff;
1747c478bd9Sstevel@tonic-gate }
1757c478bd9Sstevel@tonic-gate
1767c478bd9Sstevel@tonic-gate static void
kaif_install_immumiss(caddr_t tgt,caddr_t vatotte)1777c478bd9Sstevel@tonic-gate kaif_install_immumiss(caddr_t tgt, caddr_t vatotte)
1787c478bd9Sstevel@tonic-gate {
1797c478bd9Sstevel@tonic-gate uint32_t *patch;
1807c478bd9Sstevel@tonic-gate
1817c478bd9Sstevel@tonic-gate bcopy((caddr_t)kaif_hdlr_imiss, tgt, 128);
1827c478bd9Sstevel@tonic-gate
1837c478bd9Sstevel@tonic-gate /* LINTED - pointer alignment */
1847c478bd9Sstevel@tonic-gate patch = (uint32_t *)(tgt + ((uintptr_t)&kaif_hdlr_imiss_patch -
1857c478bd9Sstevel@tonic-gate (uintptr_t)kaif_hdlr_imiss));
1867c478bd9Sstevel@tonic-gate *patch++ |= (uintptr_t)vatotte >> 10;
1877c478bd9Sstevel@tonic-gate *patch |= ((uintptr_t)vatotte) & 0x3ff;
1887c478bd9Sstevel@tonic-gate }
1897c478bd9Sstevel@tonic-gate
1907c478bd9Sstevel@tonic-gate static struct kaif_trap_handlers {
1917c478bd9Sstevel@tonic-gate uint_t th_tt;
1927c478bd9Sstevel@tonic-gate void (*th_install)(caddr_t, caddr_t);
1937c478bd9Sstevel@tonic-gate } kaif_trap_handlers[] = {
1947c478bd9Sstevel@tonic-gate { T_INSTR_EXCEPTION, kaif_install_generic },
1951ae08745Sheppo #ifdef sun4v
1961ae08745Sheppo { T_INSTR_MMU_MISS, kaif_install_goto_tt64 },
1971ae08745Sheppo #endif
1987c478bd9Sstevel@tonic-gate { T_IDIV0, kaif_install_generic },
1997c478bd9Sstevel@tonic-gate { T_DATA_EXCEPTION, kaif_install_generic },
2001ae08745Sheppo #ifdef sun4v
2011ae08745Sheppo { T_DATA_MMU_MISS, kaif_install_goto_tt68 },
2021ae08745Sheppo #endif
2037c478bd9Sstevel@tonic-gate { T_DATA_ERROR, kaif_install_generic },
2047c478bd9Sstevel@tonic-gate { T_ALIGNMENT, kaif_install_generic },
2057c478bd9Sstevel@tonic-gate { T_FAST_INSTR_MMU_MISS, kaif_install_immumiss },
2067c478bd9Sstevel@tonic-gate { T_FAST_DATA_MMU_MISS, kaif_install_dmmumiss },
2077c478bd9Sstevel@tonic-gate { T_FAST_DATA_MMU_PROT, kaif_install_generic },
2081ae08745Sheppo #ifdef sun4v
2091ae08745Sheppo { T_INSTR_MMU_MISS + T_TL1, kaif_install_goto_tt64 },
2101ae08745Sheppo { T_DATA_MMU_MISS + T_TL1, kaif_install_goto_tt68 },
2111ae08745Sheppo #endif
2127c478bd9Sstevel@tonic-gate { T_FAST_INSTR_MMU_MISS + T_TL1, kaif_install_immumiss },
2137c478bd9Sstevel@tonic-gate { T_FAST_DATA_MMU_MISS + T_TL1, kaif_install_dmmumiss },
2147c478bd9Sstevel@tonic-gate { 0 }
2157c478bd9Sstevel@tonic-gate };
2167c478bd9Sstevel@tonic-gate
2177c478bd9Sstevel@tonic-gate static void
kaif_trap_init(void)2187c478bd9Sstevel@tonic-gate kaif_trap_init(void)
2197c478bd9Sstevel@tonic-gate {
2207c478bd9Sstevel@tonic-gate caddr_t vatotte = kmdb_kdi_get_trap_vatotte();
2217c478bd9Sstevel@tonic-gate uintptr_t brtgt;
2227c478bd9Sstevel@tonic-gate int i;
2237c478bd9Sstevel@tonic-gate
2247c478bd9Sstevel@tonic-gate /*
2251ae08745Sheppo * sun4u:
2267c478bd9Sstevel@tonic-gate * We rely upon OBP for the handling of a great many traps. As such,
2277c478bd9Sstevel@tonic-gate * we begin by populating our table with pointers to OBP's handlers.
2287c478bd9Sstevel@tonic-gate * We then copy in our own handlers where appropriate. At some point,
2297c478bd9Sstevel@tonic-gate * when we provide the bulk of the handlers, this process will be
2307c478bd9Sstevel@tonic-gate * reversed.
2311ae08745Sheppo *
2321ae08745Sheppo * sun4v:
2331ae08745Sheppo * The sun4v kernel dismisses OBP at boot. Both fast and slow TLB
2341ae08745Sheppo * misses are handled by KMDB. Breakpoint traps go directly KMDB.
2351ae08745Sheppo * All other trap entries are redirected to their respective
2361ae08745Sheppo * trap implemenation within the Solaris trap table.
2377c478bd9Sstevel@tonic-gate */
2387c478bd9Sstevel@tonic-gate for (i = 0; i < kaif_tba_native_sz; i += 0x20) {
2397c478bd9Sstevel@tonic-gate /* LINTED - pointer alignment */
2407c478bd9Sstevel@tonic-gate uint32_t *hdlr = (uint32_t *)(kaif_tba_native + i);
2417c478bd9Sstevel@tonic-gate #ifdef sun4v
2427c478bd9Sstevel@tonic-gate brtgt = (uintptr_t)(kaif_tba_kernel + i);
2431ae08745Sheppo #else
2447c478bd9Sstevel@tonic-gate brtgt = (uintptr_t)(kaif_tba_obp + i);
2451ae08745Sheppo #endif
2467c478bd9Sstevel@tonic-gate *hdlr++ = 0x03000000 | (brtgt >> 10); /* sethi brtgt, %g1 */
2477c478bd9Sstevel@tonic-gate *hdlr++ = 0x81c06000 | (brtgt & 0x3ff); /* jmp %g1 + brtgt */
2487c478bd9Sstevel@tonic-gate *hdlr++ = 0x01000000; /* nop */
2497c478bd9Sstevel@tonic-gate }
2507c478bd9Sstevel@tonic-gate
2517c478bd9Sstevel@tonic-gate for (i = 0; kaif_trap_handlers[i].th_tt != 0; i++) {
2527c478bd9Sstevel@tonic-gate struct kaif_trap_handlers *th = &kaif_trap_handlers[i];
2537c478bd9Sstevel@tonic-gate th->th_install(kaif_tba_native + th->th_tt * 0x20, vatotte);
2547c478bd9Sstevel@tonic-gate }
2557c478bd9Sstevel@tonic-gate membar_producer();
2567c478bd9Sstevel@tonic-gate }
2577c478bd9Sstevel@tonic-gate
2587c478bd9Sstevel@tonic-gate /*
2597c478bd9Sstevel@tonic-gate * The kernel is ready for us to switch to our table (the HAT has been
2607c478bd9Sstevel@tonic-gate * initialized, the hments are walkable, and the trap table's pages
2617c478bd9Sstevel@tonic-gate * have been locked into the TLBs.
2627c478bd9Sstevel@tonic-gate */
2637c478bd9Sstevel@tonic-gate static void
kaif_vmready(void)2647c478bd9Sstevel@tonic-gate kaif_vmready(void)
2657c478bd9Sstevel@tonic-gate {
2667c478bd9Sstevel@tonic-gate kaif_tba = kaif_tba_native;
2677c478bd9Sstevel@tonic-gate }
2687c478bd9Sstevel@tonic-gate
2697c478bd9Sstevel@tonic-gate /*
2707c478bd9Sstevel@tonic-gate * Called on the CPR master CPU. The driver has taken care of locking the
2717c478bd9Sstevel@tonic-gate * TLB entries. CPR restored the OBP image which contains kmdb_callback,
2727c478bd9Sstevel@tonic-gate * so there's nothing we need to do. This function should be removed entirely
2737c478bd9Sstevel@tonic-gate * in a future release.
2747c478bd9Sstevel@tonic-gate */
2757c478bd9Sstevel@tonic-gate static void
kaif_cpr_restart(void)2767c478bd9Sstevel@tonic-gate kaif_cpr_restart(void)
2777c478bd9Sstevel@tonic-gate {
2787c478bd9Sstevel@tonic-gate }
2797c478bd9Sstevel@tonic-gate
2807c478bd9Sstevel@tonic-gate static kdi_debugvec_t kaif_dvec = {
2817c478bd9Sstevel@tonic-gate NULL, /* dv_kctl_vmready */
2827c478bd9Sstevel@tonic-gate NULL, /* dv_kctl_memavail */
2837c478bd9Sstevel@tonic-gate NULL, /* dv_kctl_modavail */
2847c478bd9Sstevel@tonic-gate NULL, /* dv_kctl_thravail */
285*ae115bc7Smrj kaif_vmready,
286*ae115bc7Smrj NULL, /* dv_memavail */
2877c478bd9Sstevel@tonic-gate kaif_mod_loaded,
288*ae115bc7Smrj kaif_mod_unloading,
289*ae115bc7Smrj NULL, /* dv_kctl_cpu_init */
290*ae115bc7Smrj kaif_cpu_init,
291*ae115bc7Smrj kaif_cpr_restart
2927c478bd9Sstevel@tonic-gate };
2937c478bd9Sstevel@tonic-gate
2947c478bd9Sstevel@tonic-gate /*ARGSUSED1*/
2957c478bd9Sstevel@tonic-gate void
kaif_activate(kdi_debugvec_t ** dvecp,uint_t flags)2967c478bd9Sstevel@tonic-gate kaif_activate(kdi_debugvec_t **dvecp, uint_t flags)
2977c478bd9Sstevel@tonic-gate {
2987c478bd9Sstevel@tonic-gate kaif_prom_install();
2997c478bd9Sstevel@tonic-gate
3007c478bd9Sstevel@tonic-gate kaif_ktrap_install(0, kaif_ktrap);
3017c478bd9Sstevel@tonic-gate kaif_trap_init();
3027c478bd9Sstevel@tonic-gate
3037c478bd9Sstevel@tonic-gate *dvecp = &kaif_dvec;
3047c478bd9Sstevel@tonic-gate }
3057c478bd9Sstevel@tonic-gate
3067c478bd9Sstevel@tonic-gate void
kaif_deactivate(void)3077c478bd9Sstevel@tonic-gate kaif_deactivate(void)
3087c478bd9Sstevel@tonic-gate {
3097c478bd9Sstevel@tonic-gate kmdb_prom_interpret(" ['] noop is debugger-hook ");
3107c478bd9Sstevel@tonic-gate
3117c478bd9Sstevel@tonic-gate kaif_ktrap_restore();
3127c478bd9Sstevel@tonic-gate }
313