iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[MIPS] Make SMTC_IDLE_HOOK_DEBUG a proper option in Kconfig.debug.

Browse Source 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2007-02-26 20:46:34 +00:00
parent e016c38d18
commit c68644d330
3 changed files with 19 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/mips/Kconfig.debug
View File

@ -37,6 +37,15 @@ config DEBUG_STACK_USAGE
This option will slow down process creation somewhat. This option will slow down process creation somewhat.
config CONFIG_SMTC_IDLE_HOOK_DEBUG
bool "Enable additional debug checks before going into CPU idle loop"
depends on DEBUG_KERNEL && MIPS_MT_SMTC
help
This option enables Enable additional debug checks before going into
CPU idle loop. For details on these checks, see
arch/mips/kernel/smtc.c. This debugging option result in significant
overhead so should be disabled in production kernels.
config KGDB config KGDB
bool "Remote GDB kernel debugging" bool "Remote GDB kernel debugging"
depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB

4
arch/mips/kernel/process.c
View File

@ -51,11 +51,11 @@ ATTRIB_NORET void cpu_idle(void)
/* endless idle loop with no priority at all */ /* endless idle loop with no priority at all */
while (1) { while (1) {
while (!need_resched()) { while (!need_resched()) {
#ifdef CONFIG_MIPS_MT_SMTC #ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
extern void smtc_idle_loop_hook(void); extern void smtc_idle_loop_hook(void);
smtc_idle_loop_hook(); smtc_idle_loop_hook();
#endif /* CONFIG_MIPS_MT_SMTC */ #endif
if (cpu_wait) if (cpu_wait)
(*cpu_wait)(); (*cpu_wait)();
} }

19
arch/mips/kernel/smtc.c
View File

@ -141,10 +141,7 @@ __setup("ipibufs=", ipibufs);
__setup("nostlb", stlb_disable); __setup("nostlb", stlb_disable);
__setup("asidmask=", asidmask_set); __setup("asidmask=", asidmask_set);
/* Enable additional debug checks before going into CPU idle loop */ #ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
#define SMTC_IDLE_HOOK_DEBUG
#ifdef SMTC_IDLE_HOOK_DEBUG
static int hang_trig = 0; static int hang_trig = 0;
@ -176,7 +173,7 @@ int tcnoprog[NR_CPUS];
static atomic_t idle_hook_initialized = {0}; static atomic_t idle_hook_initialized = {0};
static int clock_hang_reported[NR_CPUS]; static int clock_hang_reported[NR_CPUS];
#endif /* SMTC_IDLE_HOOK_DEBUG */ #endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
/* Initialize shared TLB - the should probably migrate to smtc_setup_cpus() */ /* Initialize shared TLB - the should probably migrate to smtc_setup_cpus() */
@ -394,10 +391,10 @@ void mipsmt_prepare_cpus(void)
printk("ASID mask value override to 0x%x\n", asidmask); printk("ASID mask value override to 0x%x\n", asidmask);
/* Temporary */ /* Temporary */
#ifdef SMTC_IDLE_HOOK_DEBUG #ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
if (hang_trig) if (hang_trig)
printk("Logic Analyser Trigger on suspected TC hang\n"); printk("Logic Analyser Trigger on suspected TC hang\n");
#endif /* SMTC_IDLE_HOOK_DEBUG */ #endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
/* Put MVPE's into 'configuration state' */ /* Put MVPE's into 'configuration state' */
write_c0_mvpcontrol( read_c0_mvpcontrol() | MVPCONTROL_VPC ); write_c0_mvpcontrol( read_c0_mvpcontrol() | MVPCONTROL_VPC );
@ -817,9 +814,9 @@ void ipi_decode(struct smtc_ipi *pipi)
case SMTC_CLOCK_TICK: case SMTC_CLOCK_TICK:
/* Invoke Clock "Interrupt" */ /* Invoke Clock "Interrupt" */
ipi_timer_latch[dest_copy] = 0; ipi_timer_latch[dest_copy] = 0;
#ifdef SMTC_IDLE_HOOK_DEBUG #ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
clock_hang_reported[dest_copy] = 0; clock_hang_reported[dest_copy] = 0;
#endif /* SMTC_IDLE_HOOK_DEBUG */ #endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
local_timer_interrupt(0, NULL); local_timer_interrupt(0, NULL);
break; break;
case LINUX_SMP_IPI: case LINUX_SMP_IPI:
@ -1020,7 +1017,7 @@ EXPORT_SYMBOL(smtc_ipi_replay);
void smtc_idle_loop_hook(void) void smtc_idle_loop_hook(void)
{ {
#ifdef SMTC_IDLE_HOOK_DEBUG #ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
int im; int im;
int flags; int flags;
int mtflags; int mtflags;
@ -1113,7 +1110,7 @@ void smtc_idle_loop_hook(void)
local_irq_restore(flags); local_irq_restore(flags);
if (pdb_msg != &id_ho_db_msg[0]) if (pdb_msg != &id_ho_db_msg[0])
printk("CPU%d: %s", smp_processor_id(), id_ho_db_msg); printk("CPU%d: %s", smp_processor_id(), id_ho_db_msg);
#endif /* SMTC_IDLE_HOOK_DEBUG */ #endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
/* /*
* Replay any accumulated deferred IPIs. If "Instant Replay" * Replay any accumulated deferred IPIs. If "Instant Replay"