| /* |
| * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * Neither the name of ARM nor the names of its contributors may be used |
| * to endorse or promote products derived from this software without specific |
| * prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * 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" |
| |
| /* 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]); |
| } |
| |
| default: |
| WARN("Unimplemented PM Service Call: 0x%x\n", smc_fid); |
| SMC_RET1(handle, SMC_UNK); |
| } |
| } |