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[ARM] fiq debugger: Allow selection of target cpu

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Change-Id: I676bac08ba12dfa506aea16800fc80432b4bc83d
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
2010-10-01 23:41:38 -07:00
parent cd86f663d6
commit 24b3bd400f
1 changed files with 40 additions and 2 deletions
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42
arch/arm/common/fiq_debugger.c
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@@ -44,6 +44,10 @@
#include "fiq_debugger_ringbuf.h"
#define DEBUG_MAX 64
#define MAX_UNHANDLED_FIQ_COUNT 1000000
#define THREAD_INFO(sp) ((struct thread_info *) \
((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
struct fiq_debugger_state {
struct fiq_glue_handler handler;
@@ -70,6 +74,9 @@ struct fiq_debugger_state {
bool uart_clk_enabled;
struct wake_lock debugger_wake_lock;
bool console_enable;
int current_cpu;
atomic_t unhandled_fiq_count;
bool in_fiq;
#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
struct console console;
@@ -388,8 +395,7 @@ void dump_stacktrace(struct fiq_debugger_state *state,
struct pt_regs * const regs, unsigned int depth, void *ssp)
{
struct frame_tail *tail;
struct thread_info *real_thread_info = (struct thread_info *)
((unsigned long)ssp & ~(THREAD_SIZE - 1));
struct thread_info *real_thread_info = THREAD_INFO(ssp);
struct stacktrace_state sts;
sts.depth = depth;
@@ -449,6 +455,15 @@ static void debug_exec(struct fiq_debugger_state *state,
} else if (!strcmp(cmd, "console")) {
state->console_enable = true;
debug_printf(state, "console mode\n");
} else if (!strcmp(cmd, "cpu")) {
debug_printf(state, "cpu %d\n", state->current_cpu);
} else if (!strncmp(cmd, "cpu ", 4)) {
unsigned long cpu = 0;
if (strict_strtoul(cmd + 4, 10, &cpu) == 0)
state->current_cpu = cpu;
else
debug_printf(state, "invalid cpu\n");
debug_printf(state, "cpu %d\n", state->current_cpu);
} else {
if (state->debug_busy) {
debug_printf(state,
@@ -552,6 +567,26 @@ static void debug_fiq(struct fiq_glue_handler *h, void *regs, void *svc_sp)
int c;
static int last_c;
int count = 0;
unsigned int this_cpu = THREAD_INFO(svc_sp)->cpu;
if (this_cpu != state->current_cpu) {
if (state->in_fiq)
return;
if (atomic_inc_return(&state->unhandled_fiq_count) !=
MAX_UNHANDLED_FIQ_COUNT)
return;
debug_printf(state, "fiq_debugger: cpu %d not responding, "
"reverting to cpu %d\n", state->current_cpu,
this_cpu);
atomic_set(&state->unhandled_fiq_count, 0);
state->current_cpu = this_cpu;
return;
}
state->in_fiq = true;
while ((c = debug_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
count++;
@@ -606,6 +641,9 @@ static void debug_fiq(struct fiq_glue_handler *h, void *regs, void *svc_sp)
/* poke sleep timer if necessary */
if (state->debug_enable && !state->no_sleep)
debug_force_irq(state);
atomic_set(&state->unhandled_fiq_count, 0);
state->in_fiq = false;
}
static void debug_resume(struct fiq_glue_handler *h)