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authorDavid Howells <dhowells@redhat.com>2011-03-18 16:54:30 +0000
committerDavid Howells <dhowells@redhat.com>2011-03-18 16:54:30 +0000
commit67ddb4052daac9d449caf2643ac365d42a04219a (patch)
tree7c610973a19b7e70b47294c540b182f203680fde /arch/mn10300/kernel/entry.S
parent7f386ac3272e057fbf51e5b5712fad1a80e77125 (diff)
downloadop-kernel-dev-67ddb4052daac9d449caf2643ac365d42a04219a.zip
op-kernel-dev-67ddb4052daac9d449caf2643ac365d42a04219a.tar.gz
MN10300: Create generic kernel debugger hooks
Create generic kernel debugger hooks in the MN10300 arch and make gdbstub use them. This is a preparation for KGDB support. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/mn10300/kernel/entry.S')
-rw-r--r--arch/mn10300/kernel/entry.S36
1 files changed, 24 insertions, 12 deletions
diff --git a/arch/mn10300/kernel/entry.S b/arch/mn10300/kernel/entry.S
index 8e79a04..fb93ad7 100644
--- a/arch/mn10300/kernel/entry.S
+++ b/arch/mn10300/kernel/entry.S
@@ -266,7 +266,11 @@ ENTRY(raw_bus_error)
###############################################################################
#
-# Miscellaneous exception entry points
+# NMI exception entry points
+#
+# This is used by ordinary interrupt channels that have the GxICR_NMI bit set
+# in addition to the main NMI and Watchdog channels. SMP NMI IPIs use this
+# facility.
#
###############################################################################
ENTRY(nmi_handler)
@@ -281,7 +285,7 @@ ENTRY(nmi_handler)
and NMIAGR_GN,d0
lsr 0x2,d0
cmp CALL_FUNCTION_NMI_IPI,d0
- bne 5f # if not call function, jump
+ bne nmi_not_smp_callfunc # if not call function, jump
# function call nmi ipi
add 4,sp # no need to store TBR
@@ -295,30 +299,38 @@ ENTRY(nmi_handler)
call smp_nmi_call_function_interrupt[],0
RESTORE_ALL
-5:
-#ifdef CONFIG_GDBSTUB
- cmp GDB_NMI_IPI,d0
- bne 3f # if not gdb nmi ipi, jump
+nmi_not_smp_callfunc:
+#ifdef CONFIG_KERNEL_DEBUGGER
+ cmp DEBUGGER_NMI_IPI,d0
+ bne nmi_not_debugger # if not kernel debugger NMI IPI, jump
- # gdb nmi ipi
+ # kernel debugger NMI IPI
add 4,sp # no need to store TBR
mov GxICR_DETECT,d0 # clear NMI
- movbu d0,(GxICR(GDB_NMI_IPI))
- movhu (GxICR(GDB_NMI_IPI)),d0
+ movbu d0,(GxICR(DEBUGGER_NMI_IPI))
+ movhu (GxICR(DEBUGGER_NMI_IPI)),d0
and ~EPSW_NMID,epsw # enable NMI
mov (sp),d0
SAVE_ALL
- call gdbstub_nmi_wait[],0
+ mov fp,d0 # arg 0: stacked register file
+ mov a2,d1 # arg 1: exception number
+ call debugger_nmi_interrupt[],0
RESTORE_ALL
-3:
-#endif /* CONFIG_GDBSTUB */
+
+nmi_not_debugger:
+#endif /* CONFIG_KERNEL_DEBUGGER */
mov (sp),d0 # restore TBR to d0
add 4,sp
#endif /* CONFIG_SMP */
bra __common_exception_nonmi
+###############################################################################
+#
+# General exception entry point
+#
+###############################################################################
ENTRY(__common_exception)
add -4,sp
mov d0,(sp)
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