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MN10300: Create generic kernel debugger hooks

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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>
This commit is contained in:
David Howells
2011-03-18 16:54:30 +00:00
parent 7f386ac327
commit 67ddb4052d
14 changed files with 313 additions and 244 deletions
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26
arch/mn10300/kernel/smp.c
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@@ -439,6 +439,22 @@ int smp_nmi_call_function(smp_call_func_t func, void *info, int wait)
return ret;
}
/**
* 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 @@ static void __init smp_cpu_init(void)
/**
* 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 @@ void smp_prepare_cpu_init(void)
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