Exemple #1
0
static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t)
{
    struct thread_info *thread = (struct thread_info *)t;
    struct crunch_state *crunch_state;
    u32 devcfg;

    crunch_state = &thread->crunchstate;

    switch (cmd) {
    case THREAD_NOTIFY_FLUSH:
        memset(crunch_state, 0, sizeof(*crunch_state));

        /*
         * FALLTHROUGH: Ensure we don't try to overwrite our newly
         * initialised state information on the first fault.
         */

    case THREAD_NOTIFY_RELEASE:
        crunch_task_release(thread);
        break;

    case THREAD_NOTIFY_SWITCH:
        devcfg = __raw_readl(EP93XX_SYSCON_DEVICE_CONFIG);
        if (crunch_enabled(devcfg) || crunch_owner == crunch_state) {
            devcfg ^= EP93XX_SYSCON_DEVICE_CONFIG_CRUNCH_ENABLE;
            __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
            __raw_writel(devcfg, EP93XX_SYSCON_DEVICE_CONFIG);
        }
        break;
    }

    return NOTIFY_DONE;
}
Exemple #2
0
static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t)
{
	struct thread_info *thread = (struct thread_info *)t;
	struct crunch_state *crunch_state;
	u32 devcfg;

	crunch_state = &thread->crunchstate;

	switch (cmd) {
	case THREAD_NOTIFY_FLUSH:
		memset(crunch_state, 0, sizeof(*crunch_state));


	case THREAD_NOTIFY_EXIT:
		crunch_task_release(thread);
		break;

	case THREAD_NOTIFY_SWITCH:
		devcfg = __raw_readl(EP93XX_SYSCON_DEVCFG);
		if (crunch_enabled(devcfg) || crunch_owner == crunch_state) {
			devcfg ^= EP93XX_SYSCON_DEVCFG_CPENA;
			__raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
			__raw_writel(devcfg, EP93XX_SYSCON_DEVCFG);
		}
		break;
	}

	return NOTIFY_DONE;
}
Exemple #3
0
static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t)
{
	struct thread_info *thread = (struct thread_info *)t;
	struct crunch_state *crunch_state;
	u32 devcfg;

	crunch_state = &thread->crunchstate;

	switch (cmd) {
	case THREAD_NOTIFY_FLUSH:
		memset(crunch_state, 0, sizeof(*crunch_state));

		/*
		 * FALLTHROUGH: Ensure we don't try to overwrite our newly
		 * initialised state information on the first fault.
		 */

	case THREAD_NOTIFY_RELEASE:
		crunch_task_release(thread);
		break;

	case THREAD_NOTIFY_SWITCH:
		devcfg = __raw_readl(EP93XX_SYSCON_DEVCFG);
		if (crunch_enabled(devcfg) || crunch_owner == crunch_state) {
			/*
			 * We don't use ep93xx_syscon_swlocked_write() here
			 * because we are on the context switch path and
			 * preemption is already disabled.
			 */
			devcfg ^= EP93XX_SYSCON_DEVCFG_CPENA;
			__raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
			__raw_writel(devcfg, EP93XX_SYSCON_DEVCFG);
		}
		break;
	}

	return NOTIFY_DONE;
}