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| author |   David Howells <dhowells@redhat.com> | 2011-03-18 16:54:30 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2011-03-18 16:54:30 +0000 |
| commit | 67ddb4052daac9d449caf2643ac365d42a04219a (patch) | |
| tree | 7c610973a19b7e70b47294c540b182f203680fde /arch/mn10300/kernel/entry.S | |
| parent | MN10300: Create general kernel debugger cache flushing (diff) | |
| download | linux-dev-67ddb4052daac9d449caf2643ac365d42a04219a.tar.xz linux-dev-67ddb4052daac9d449caf2643ac365d42a04219a.zip | |
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.S | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/arch/mn10300/kernel/entry.S b/arch/mn10300/kernel/entry.S index 8e79a04f1cb0..fb93ad720b82 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) |