/*
* Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/*
* Top-level SMC handler for ZynqMP power management calls and
* IPI setup functions for communication with PMU.
*/
#include <errno.h>
#include <gic_common.h>
#include <runtime_svc.h>
#include <string.h>
#include "pm_api_sys.h"
#include "pm_client.h"
#include "pm_ipi.h"
#include "../zynqmp_private.h"
#define PM_GET_CALLBACK_DATA 0xa01
/* 0 - UP, !0 - DOWN */
static int32_t pm_down = !0;
/**
* pm_context - Structure which contains data for power management
* @api_version version of PM API, must match with one on PMU side
* @payload payload array used to store received
* data from ipi buffer registers
*/
static struct {
uint32_t api_version;
uint32_t payload[PAYLOAD_ARG_CNT];
} pm_ctx;
/**
* pm_setup() - PM service setup
*
* @return On success, the initialization function must return 0.
* Any other return value will cause the framework to ignore
* the service
*
* Initialization functions for ZynqMP power management for
* communicaton with PMU.
*
* Called from sip_svc_setup initialization function with the
* rt_svc_init signature.
*/
int pm_setup(void)
{
int status;
if (!zynqmp_is_pmu_up())
return -ENODEV;
status = pm_ipi_init();
if (status == 0)
INFO("BL31: PM Service Init Complete: API v%d.%d\n",
PM_VERSION_MAJOR, PM_VERSION_MINOR);
else
INFO("BL31: PM Service Init Failed, Error Code %d!\n", status);
pm_down = status;
return status;
}
/**
* pm_smc_handler() - SMC handler for PM-API calls coming from EL1/EL2.
* @smc_fid - Function Identifier
* @x1 - x4 - Arguments
* @cookie - Unused
* @handler - Pointer to caller's context structure
*
* @return - Unused
*
* Determines that smc_fid is valid and supported PM SMC Function ID from the
* list of pm_api_ids, otherwise completes the request with
* the unknown SMC Function ID
*
* The SMC calls for PM service are forwarded from SIP Service SMC handler
* function with rt_svc_handle signature
*/
uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
uint64_t x4, void *cookie, void *handle, uint64_t flags)
{
enum pm_ret_status ret;
uint32_t pm_arg[4];
/* Handle case where PM wasn't initialized properly */
if (pm_down)
SMC_RET1(handle, SMC_UNK);
pm_arg[0] = (uint32_t)x1;
pm_arg[1] = (uint32_t)(x1 >> 32);
pm_arg[2] = (uint32_t)x2;
pm_arg[3] = (uint32_t)(x2 >> 32);
switch (smc_fid & FUNCID_NUM_MASK) {
/* PM API Functions */
case PM_SELF_SUSPEND:
ret = pm_self_suspend(pm_arg[0], pm_arg[1], pm_arg[2],
pm_arg[3]);
SMC_RET1(handle, (uint64_t)ret);
case PM_REQ_SUSPEND:
ret = pm_req_suspend(pm_arg[0], pm_arg[1], pm_arg[2],
pm_arg[3]);
SMC_RET1(handle, (uint64_t)ret);
case PM_REQ_WAKEUP:
ret = pm_req_wakeup(pm_arg[0], pm_arg[1], pm_arg[2],
pm_arg[3]);
SMC_RET1(handle, (uint64_t)ret);
case PM_FORCE_POWERDOWN:
ret = pm_force_powerdown(pm_arg[0], pm_arg[1]);
SMC_RET1(handle, (uint64_t)ret);
case PM_ABORT_SUSPEND:
ret = pm_abort_suspend(pm_arg[0]);
SMC_RET1(handle, (uint64_t)ret);
case PM_SET_WAKEUP_SOURCE:
ret = pm_set_wakeup_source(pm_arg[0], pm_arg[1], pm_arg[2]);
SMC_RET1(handle, (uint64_t)ret);
case PM_SYSTEM_SHUTDOWN:
ret = pm_system_shutdown(pm_arg[0], pm_arg[1]);
SMC_RET1(handle, (uint64_t)ret);
case PM_REQ_NODE:
ret = pm_req_node(pm_arg[0], pm_arg[1], pm_arg[2], pm_arg[3]);
SMC_RET1(handle, (uint64_t)ret);
case PM_RELEASE_NODE:
ret = pm_release_node(pm_arg[0]);
SMC_RET1(handle, (uint64_t)ret);
case PM_SET_REQUIREMENT:
ret = pm_set_requirement(pm_arg[0], pm_arg[1], pm_arg[2],
pm_arg[3]);
SMC_RET1(handle, (uint64_t)ret);
case PM_SET_MAX_LATENCY:
ret = pm_set_max_latency(pm_arg[0], pm_arg[1]);
SMC_RET1(handle, (uint64_t)ret);
case PM_GET_API_VERSION:
/* Check is PM API version already verified */
if (pm_ctx.api_version == PM_VERSION) {
SMC_RET1(handle, (uint64_t)PM_RET_SUCCESS |
((uint64_t)PM_VERSION << 32));
}
ret = pm_get_api_version(&pm_ctx.api_version);
/*
* Enable IPI IRQ
* assume the rich OS is OK to handle callback IRQs now.
* Even if we were wrong, it would not enable the IRQ in
* the GIC.
*/
pm_ipi_irq_enable();
SMC_RET1(handle, (uint64_t)ret |
((uint64_t)pm_ctx.api_version << 32));
case PM_SET_CONFIGURATION:
ret = pm_set_configuration(pm_arg[0]);
SMC_RET1(handle, (uint64_t)ret);
case PM_GET_NODE_STATUS:
ret = pm_get_node_status(pm_arg[0]);
SMC_RET1(handle, (uint64_t)ret);
case PM_GET_OP_CHARACTERISTIC:
{
uint32_t result;
ret = pm_get_op_characteristic(pm_arg[0], pm_arg[1], &result);
SMC_RET1(handle, (uint64_t)ret | ((uint64_t)result << 32));
}
case PM_REGISTER_NOTIFIER:
ret = pm_register_notifier(pm_arg[0], pm_arg[1], pm_arg[2],
pm_arg[3]);
SMC_RET1(handle, (uint64_t)ret);
case PM_RESET_ASSERT:
ret = pm_reset_assert(pm_arg[0], pm_arg[1]);
SMC_RET1(handle, (uint64_t)ret);
case PM_RESET_GET_STATUS:
{
uint32_t reset_status;
ret = pm_reset_get_status(pm_arg[0], &reset_status);
SMC_RET1(handle, (uint64_t)ret |
((uint64_t)reset_status << 32));
}
/* PM memory access functions */
case PM_MMIO_WRITE:
ret = pm_mmio_write(pm_arg[0], pm_arg[1], pm_arg[2]);
SMC_RET1(handle, (uint64_t)ret);
case PM_MMIO_READ:
{
uint32_t value;
ret = pm_mmio_read(pm_arg[0], &value);
SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
}
case PM_FPGA_LOAD:
ret = pm_fpga_load(pm_arg[0], pm_arg[1], pm_arg[2], pm_arg[3]);
SMC_RET1(handle, (uint64_t)ret);
case PM_FPGA_GET_STATUS:
{
uint32_t value;
ret = pm_fpga_get_status(&value);
SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
}
case PM_GET_CHIPID:
{
uint32_t result[2];
ret = pm_get_chipid(result);
SMC_RET2(handle, (uint64_t)ret | ((uint64_t)result[0] << 32),
result[1]);
}
case PM_GET_CALLBACK_DATA:
{
uint32_t result[4];
pm_get_callbackdata(result, sizeof(result));
SMC_RET2(handle,
(uint64_t)result[0] | ((uint64_t)result[1] << 32),
(uint64_t)result[2] | ((uint64_t)result[3] << 32));
}
default:
WARN("Unimplemented PM Service Call: 0x%x\n", smc_fid);
SMC_RET1(handle, SMC_UNK);
}
}
