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g: change default idle behavior based on bus obfuscation availability

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Set the default idle action based on whether bus obfuscation is enabled.

BUG=none
BRANCH=none
TEST=verify the idle default is sleep on b1 boards and wfi on b2.
     Verify that both types of chips go to sleep and resume
     successfully.

Change-Id: Ib5a11c4060aa411ff36c06c7fcadf0bf4c223bf1
Signed-off-by: Mary Ruthven <mruthven@chromium.org>
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/410167
This commit is contained in:
Mary Ruthven
2016-11-11 13:40:49 -08:00
committed by chrome-bot
parent b65e2a895a
commit 0175c4b812
1 changed files with 23 additions and 7 deletions
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30
chip/g/idle.c
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@@ -7,6 +7,7 @@
#include "console.h"
#include "hooks.h"
#include "hwtimer.h"
#include "init_chip.h"
#include "rdd.h"
#include "registers.h"
#include "system.h"
@@ -14,6 +15,8 @@
#include "timer.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_USB, format, ## args)
/* What to do when we're just waiting */
static enum {
DONT_KNOW,
@@ -23,13 +26,10 @@ static enum {
NUM_CHOICES
} idle_action;
/*
* TODO(crosbug.com/p/59641): Set the default action to sleep when the new
* boards come in.
*/
#define IDLE_DEFAULT IDLE_WFI
#define EVENT_MIN 500
static int idle_default;
static const char const *idle_name[] = {
"invalid",
"wfi",
@@ -166,7 +166,7 @@ void clock_refresh_console_in_use(void)
void disable_deep_sleep(void)
{
idle_action = IDLE_DEFAULT;
idle_action = idle_default;
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, disable_deep_sleep, HOOK_PRIO_DEFAULT);
@@ -176,6 +176,22 @@ void enable_deep_sleep(void)
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, enable_deep_sleep, HOOK_PRIO_DEFAULT);
static void idle_init(void)
{
/*
* If bus obfuscation is enabled disable sleep.
*/
if ((GR_FUSE(OBFUSCATION_EN) == 5) ||
(GR_FUSE(FW_DEFINED_BROM_APPLYSEC) & (1 << 3)) ||
(runlevel_is_high() && GREAD(GLOBALSEC, OBFS_SW_EN))) {
CPRINTS("bus obfuscation enabled disabling sleep");
idle_default = IDLE_WFI;
} else {
idle_default = IDLE_SLEEP;
}
}
DECLARE_HOOK(HOOK_INIT, idle_init, HOOK_PRIO_DEFAULT - 1);
/* Custom idle task, executed when no tasks are ready to be scheduled. */
void __idle(void)
{
@@ -190,7 +206,7 @@ void __idle(void)
* this and set the idle_action.
*/
if (!idle_action)
idle_action = IDLE_DEFAULT;
idle_action = idle_default;
/* Disable sleep until 3 minutes after init */
delay_sleep_by(3 * MINUTE);