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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/smp.c | |
| 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/smp.c')
| -rw-r--r-- | arch/mn10300/kernel/smp.c | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/arch/mn10300/kernel/smp.c b/arch/mn10300/kernel/smp.c index 1ebb79f1650d..51c02f97dcea 100644 --- a/arch/mn10300/kernel/smp.c +++ b/arch/mn10300/kernel/smp.c @@ -440,6 +440,22 @@ int smp_nmi_call_function(smp_call_func_t func, void *info, int wait) } /** + * 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 |