[src/trunk]: src Add ddb "mach reset" command for Arm ports.

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/36edd500b3f5
branches:  trunk
changeset: 1011504:36edd500b3f5
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Thu Jul 02 11:10:47 2020 +0000

description:
Add ddb "mach reset" command for Arm ports.

diffstat:

 share/man/man4/ddb.4                  |   8 ++++++--
 sys/arch/aarch64/aarch64/db_machdep.c |  23 +++++++++++++++++++++--
 sys/arch/arm/arm32/db_machdep.c       |  19 +++++++++++++++++--
 3 files changed, 44 insertions(+), 6 deletions(-)

diffs (148 lines):

diff -r 57b9046bfa10 -r 36edd500b3f5 share/man/man4/ddb.4
--- a/share/man/man4/ddb.4      Thu Jul 02 11:08:55 2020 +0000
+++ b/share/man/man4/ddb.4      Thu Jul 02 11:10:47 2020 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: ddb.4,v 1.189 2020/03/30 20:47:57 maya Exp $
+.\"    $NetBSD: ddb.4,v 1.190 2020/07/02 11:10:47 jmcneill Exp $
 .\"
 .\" Copyright (c) 1997 - 2019 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -56,7 +56,7 @@
 .\" any improvements or extensions that they make and grant Carnegie Mellon
 .\" the rights to redistribute these changes.
 .\"
-.Dd March 30, 2020
+.Dd July 2, 2020
 .Dt DDB 4
 .Os
 .Sh NAME
@@ -1018,6 +1018,8 @@
 Print lwp information about the ``struct lwp''.
 .It Ic pte
 Print PTE information.
+.It Ic reset
+Reset the system.
 .It Ic sysreg
 Print system registers.
 .It Ic watch
@@ -1063,6 +1065,8 @@
 .Bl -tag -width "traptrace" -compact
 .It Ic frame
 Given a trap frame address, print out the trap frame.
+.It Ic reset
+Reset the system.
 .El
 .Ss HPPA
 .Bl -tag -width "traptrace" -compact
diff -r 57b9046bfa10 -r 36edd500b3f5 sys/arch/aarch64/aarch64/db_machdep.c
--- a/sys/arch/aarch64/aarch64/db_machdep.c     Thu Jul 02 11:08:55 2020 +0000
+++ b/sys/arch/aarch64/aarch64/db_machdep.c     Thu Jul 02 11:10:47 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: db_machdep.c,v 1.24 2020/05/22 19:29:26 ryo Exp $ */
+/* $NetBSD: db_machdep.c,v 1.25 2020/07/02 11:10:48 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: db_machdep.c,v 1.24 2020/05/22 19:29:26 ryo Exp $");
+__KERNEL_RCSID(0, "$NetBSD: db_machdep.c,v 1.25 2020/07/02 11:10:48 jmcneill Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_compat_netbsd32.h"
@@ -68,6 +68,7 @@
 void db_md_frame_cmd(db_expr_t, bool, db_expr_t, const char *);
 void db_md_lwp_cmd(db_expr_t, bool, db_expr_t, const char *);
 void db_md_pte_cmd(db_expr_t, bool, db_expr_t, const char *);
+void db_md_reset_cmd(db_expr_t, bool, db_expr_t, const char *);
 void db_md_tlbi_cmd(db_expr_t, bool, db_expr_t, const char *);
 void db_md_ttbr_cmd(db_expr_t, bool, db_expr_t, const char *);
 void db_md_sysreg_cmd(db_expr_t, bool, db_expr_t, const char *);
@@ -115,6 +116,12 @@
        },
        {
                DDB_ADD_CMD(
+                   "reset", db_md_reset_cmd, 0,
+                   "Reset the system",
+                   NULL, NULL)
+       },
+       {
+               DDB_ADD_CMD(
                    "sysreg", db_md_sysreg_cmd, 0,
                    "Displays system registers",
                    NULL, NULL)
@@ -453,6 +460,18 @@
 }
 
 void
+db_md_reset_cmd(db_expr_t addr, bool have_addr, db_expr_t count,
+    const char *modif)
+{
+       if (cpu_reset_address == NULL) {
+               db_printf("cpu_reset_address is not set\n");
+               return;
+       }
+
+       cpu_reset_address();
+}
+
+void
 db_md_tlbi_cmd(db_expr_t addr, bool have_addr, db_expr_t count,
     const char *modif)
 {
diff -r 57b9046bfa10 -r 36edd500b3f5 sys/arch/arm/arm32/db_machdep.c
--- a/sys/arch/arm/arm32/db_machdep.c   Thu Jul 02 11:08:55 2020 +0000
+++ b/sys/arch/arm/arm32/db_machdep.c   Thu Jul 02 11:10:47 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: db_machdep.c,v 1.31 2020/06/20 07:10:36 skrll Exp $    */
+/*     $NetBSD: db_machdep.c,v 1.32 2020/07/02 11:10:48 jmcneill Exp $ */
 
 /*
  * Copyright (c) 1996 Mark Brinicombe
@@ -34,7 +34,7 @@
 #endif
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: db_machdep.c,v 1.31 2020/06/20 07:10:36 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: db_machdep.c,v 1.32 2020/07/02 11:10:48 jmcneill Exp $");
 
 #include <sys/param.h>
 
@@ -44,6 +44,7 @@
 #include <sys/systm.h>
 
 #include <arm/arm32/db_machdep.h>
+#include <arm/arm32/machdep.h>
 #include <arm/cpufunc.h>
 
 #include <ddb/db_access.h>
@@ -131,6 +132,9 @@
                        "[address]",
                        "   address:\taddress of trapfame to display")},
 #ifdef _KERNEL
+       { DDB_ADD_CMD("reset",  db_reset_cmd,           0,
+                       "Reset the system",
+                       NULL,NULL) },
 #if defined(CPU_CORTEXA5) || defined(CPU_CORTEXA7)
        { DDB_ADD_CMD("tlb",    db_show_tlb_cmd,        0,
                        "Displays the TLB",
@@ -205,6 +209,17 @@
            armreg_ttbr_read());
 }
 
+void
+db_reset_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif)
+{
+       if (cpu_reset_address == NULL) {
+               db_printf("cpu_reset_address is not set\n");
+               return;
+       }
+
+       cpu_reset_address();
+}
+
 #if defined(CPU_CORTEXA5) || defined(CPU_CORTEXA7)
 static void
 tlb_print_common_header(const char *str)