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>
diff --git a/arch/mn10300/kernel/smp.c b/arch/mn10300/kernel/smp.c
index 1ebb79f..51c02f9 100644
--- a/arch/mn10300/kernel/smp.c
+++ b/arch/mn10300/kernel/smp.c
@@ -440,6 +440,22 @@
}
/**
+ * smp_jump_to_debugger - Make other CPUs enter the debugger by sending an IPI
+ *
+ * Send a non-maskable request to all other CPUs in the system, instructing
+ * them to jump into the debugger. The caller is responsible for checking that
+ * the other CPUs responded to the instruction.
+ *
+ * The caller should make sure that this CPU's debugger IPI is disabled.
+ */
+void smp_jump_to_debugger(void)
+{
+ if (num_online_cpus() > 1)
+ /* Send a message to all other CPUs */
+ send_IPI_allbutself(DEBUGGER_NMI_IPI);
+}
+
+/**
* stop_this_cpu - Callback to stop a CPU.
* @unused: Callback context (ignored).
*/
@@ -603,7 +619,7 @@
/**
* smp_prepare_cpu_init - Initialise CPU in startup_secondary
*
- * Set interrupt level 0-6 setting and init ICR of gdbstub.
+ * Set interrupt level 0-6 setting and init ICR of the kernel debugger.
*/
void smp_prepare_cpu_init(void)
{
@@ -622,15 +638,15 @@
for (loop = 0; loop < GxICR_NUM_IRQS; loop++)
GxICR(loop) = GxICR_LEVEL_6 | GxICR_DETECT;
-#ifdef CONFIG_GDBSTUB
- /* initialise GDB-stub */
+#ifdef CONFIG_KERNEL_DEBUGGER
+ /* initialise the kernel debugger interrupt */
do {
unsigned long flags;
u16 tmp16;
flags = arch_local_cli_save();
- GxICR(GDB_NMI_IPI) = GxICR_NMI | GxICR_ENABLE | GxICR_DETECT;
- tmp16 = GxICR(GDB_NMI_IPI);
+ GxICR(DEBUGGER_NMI_IPI) = GxICR_NMI | GxICR_ENABLE | GxICR_DETECT;
+ tmp16 = GxICR(DEBUGGER_NMI_IPI);
arch_local_irq_restore(flags);
} while (0);
#endif
