Ejemplo n.º 1
0
/**
 * pm_req_wakeup() - PM call for processor to wake up selected processor
 *		     or subsystem
 * @target	Node id of the processor or subsystem to wake up
 * @ack		Flag to specify whether acknowledge requested
 * @set_address	Resume address presence indicator
 *				1 resume address specified, 0 otherwise
 * @address	Resume address
 *
 * This API function is either used to power up another APU core for SMP
 * (by PSCI) or to power up an entirely different PU or subsystem, such
 * as RPU0, RPU, or PL_CORE_xx. Resume address for the target PU will be
 * automatically set by PMU.
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_req_wakeup(enum pm_node_id target,
				 unsigned int set_address,
				 uintptr_t address,
				 enum pm_request_ack ack)
{
	uint32_t payload[PAYLOAD_ARG_CNT];
	uint64_t encoded_address;
	const struct pm_proc *proc = pm_get_proc_by_node(target);

	/* invoke APU-specific code for waking up another APU core */
	pm_client_wakeup(proc);

	/* encode set Address into 1st bit of address */
	encoded_address = address;
	encoded_address |= !!set_address;

	/* Send request to the PMU to perform the wake of the PU */
	PM_PACK_PAYLOAD5(payload, PM_REQ_WAKEUP, target, encoded_address,
			 encoded_address >> 32, ack);

	if (ack == REQ_ACK_BLOCKING)
		return pm_ipi_send_sync(primary_proc, payload, NULL);
	else
		return pm_ipi_send(primary_proc, payload);
}
Ejemplo n.º 2
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/**
 * pm_mmio_read() - Read value from protected mmio
 * @address	Address to write to
 * @value	Value to write
 *
 * This function provides access to PM-related control registers
 * that may not be directly accessible by a particular PU.
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_mmio_read(uintptr_t address, unsigned int *value)
{
	uint32_t payload[PAYLOAD_ARG_CNT];

	/* Send request to the PMU */
	PM_PACK_PAYLOAD2(payload, PM_MMIO_READ, address);
	return pm_ipi_send_sync(primary_proc, payload, value);
}
Ejemplo n.º 3
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/**
 * pm_get_api_version() - Get version number of PMU PM firmware
 * @version	Returns 32-bit version number of PMU Power Management Firmware
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_get_api_version(unsigned int *version)
{
	uint32_t payload[PAYLOAD_ARG_CNT];

	/* Send request to the PMU */
	PM_PACK_PAYLOAD1(payload, PM_GET_API_VERSION);
	return pm_ipi_send_sync(primary_proc, payload, version);
}
Ejemplo n.º 4
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/**
 * pm_reset_get_status() - Get current status of a reset line
 * @reset	Reset ID
 * @reset_status Returns current status of selected reset line
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_reset_get_status(unsigned int reset,
				       unsigned int *reset_status)
{
	uint32_t payload[PAYLOAD_ARG_CNT];

	/* Send request to the PMU */
	PM_PACK_PAYLOAD2(payload, PM_RESET_GET_STATUS, reset);
	return pm_ipi_send_sync(primary_proc, payload, reset_status);
}
Ejemplo n.º 5
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/**
 * pm_force_powerdown() - PM call to request for another PU or subsystem to
 *			  be powered down forcefully
 * @target	Node id of the targeted PU or subsystem
 * @ack		Flag to specify whether acknowledge is requested
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_force_powerdown(enum pm_node_id target,
				      enum pm_request_ack ack)
{
	uint32_t payload[PAYLOAD_ARG_CNT];

	/* Send request to the PMU */
	PM_PACK_PAYLOAD3(payload, PM_FORCE_POWERDOWN, target, ack);

	if (ack == REQ_ACK_BLOCKING)
		return pm_ipi_send_sync(primary_proc, payload, NULL);
	else
		return pm_ipi_send(primary_proc, payload);
}
Ejemplo n.º 6
0
/**
 * pm_req_suspend() - PM call to request for another PU or subsystem to
 *		      be suspended gracefully.
 * @target	Node id of the targeted PU or subsystem
 * @ack		Flag to specify whether acknowledge is requested
 * @latency	Requested wakeup latency (not supported)
 * @state	Requested state (not supported)
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_req_suspend(enum pm_node_id target,
				  enum pm_request_ack ack,
				  unsigned int latency, unsigned int state)
{
	uint32_t payload[PAYLOAD_ARG_CNT];

	/* Send request to the PMU */
	PM_PACK_PAYLOAD5(payload, PM_REQ_SUSPEND, target, ack, latency, state);
	if (ack == REQ_ACK_BLOCKING)
		return pm_ipi_send_sync(primary_proc, payload, NULL);
	else
		return pm_ipi_send(primary_proc, payload);
}
Ejemplo n.º 7
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/**
 * pm_req_node() - PM call to request a node with specific capabilities
 * @nid		Node id of the slave
 * @capabilities Requested capabilities of the slave
 * @qos		Quality of service (not supported)
 * @ack		Flag to specify whether acknowledge is requested
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_req_node(enum pm_node_id nid,
			       unsigned int capabilities,
			       unsigned int qos,
			       enum pm_request_ack ack)
{
	uint32_t payload[PAYLOAD_ARG_CNT];

	PM_PACK_PAYLOAD5(payload, PM_REQ_NODE, nid, capabilities, qos, ack);

	if (ack == REQ_ACK_BLOCKING)
		return pm_ipi_send_sync(primary_proc, payload, NULL);
	else
		return pm_ipi_send(primary_proc, payload);
}
Ejemplo n.º 8
0
/**
 * pm_set_requirement() - PM call to set requirement for PM slaves
 * @nid		Node id of the slave
 * @capabilities Requested capabilities of the slave
 * @qos		Quality of service (not supported)
 * @ack		Flag to specify whether acknowledge is requested
 *
 * This API function is to be used for slaves a PU already has requested
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_set_requirement(const enum pm_node_id nid,
				      const uint32_t capabilities,
				      const uint32_t qos,
				      const enum pm_request_ack ack)
{
	uint32_t payload[PAYLOAD_ARG_CNT];

	PM_PACK_PAYLOAD5(payload, PM_SET_REQUIREMENT, nid, capabilities, qos,
			 ack);

	if (REQ_ACK_BLOCKING == ack)
		return pm_ipi_send_sync(primary_proc, payload, NULL);
	else
		return pm_ipi_send(primary_proc, payload);
}
Ejemplo n.º 9
0
/**
 * pm_self_suspend() - PM call for processor to suspend itself
 * @nid		Node id of the processor or subsystem
 * @latency	Requested maximum wakeup latency (not supported)
 * @state	Requested state (not supported)
 * @address	Resume address
 *
 * This is a blocking call, it will return only once PMU has responded.
 * On a wakeup, resume address will be automatically set by PMU.
 *
 * @return	Returns status, either success or error+reason
 */
enum pm_ret_status pm_self_suspend(enum pm_node_id nid,
				   unsigned int latency,
				   unsigned int state,
				   uintptr_t address)
{
	uint32_t payload[PAYLOAD_ARG_CNT];
	unsigned int cpuid = plat_my_core_pos();
	const struct pm_proc *proc = pm_get_proc(cpuid);

	/*
	 * Do client specific suspend operations
	 * (e.g. set powerdown request bit)
	 */
	pm_client_suspend(proc);
	/* Send request to the PMU */
	PM_PACK_PAYLOAD6(payload, PM_SELF_SUSPEND, proc->node_id, latency,
			 state, address, (address >> 32));
	return pm_ipi_send_sync(proc, payload, NULL);
}