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https://github.com/ARM-software/arm-trusted-firmware.git
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e8ffe79d06
Add IPI mailbox service to manage Xilinx ZynqMP IPI(Inter Processors Interrupt) access. Signed-off-by: Wendy Liang <jliang@xilinx.com>
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/*
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* Top-level SMC handler for ZynqMP IPI Mailbox doorbell functions.
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*/
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#include <bakery_lock.h>
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#include <debug.h>
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#include <errno.h>
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#include <mmio.h>
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#include <runtime_svc.h>
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#include <string.h>
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#include "ipi_mailbox_svc.h"
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#include "../zynqmp_ipi.h"
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#include "../zynqmp_private.h"
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#include "../../../services/spd/trusty/smcall.h"
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/*********************************************************************
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* Macros definitions
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********************************************************************/
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/* IPI SMC calls macros: */
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#define IPI_SMC_OPEN_IRQ_MASK 0x00000001U /* IRQ enable bit in IPI
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* open SMC call
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*/
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#define IPI_SMC_NOTIFY_BLOCK_MASK 0x00000001U /* Flag to indicate if
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* IPI notification needs
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* to be blocking.
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*/
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#define IPI_SMC_ENQUIRY_DIRQ_MASK 0x00000001U /* Flag to indicate if
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* notification interrupt
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* to be disabled.
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*/
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#define IPI_SMC_ACK_EIRQ_MASK 0x00000001U /* Flag to indicate if
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* notification interrupt
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* to be enable.
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*/
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#define UNSIGNED32_MASK 0xFFFFFFFFU /* 32bit mask */
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/**
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* ipi_smc_handler() - SMC handler for IPI SMC calls
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*
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* @smc_fid - Function identifier
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* @x1 - x4 - Arguments
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* @cookie - Unused
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* @handler - Pointer to caller's context structure
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*
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* @return - Unused
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*
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* Determines that smc_fid is valid and supported PM SMC Function ID from the
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* list of pm_api_ids, otherwise completes the request with
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* the unknown SMC Function ID
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*
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* The SMC calls for PM service are forwarded from SIP Service SMC handler
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* function with rt_svc_handle signature
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*/
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uint64_t ipi_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2,
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uint64_t x3, uint64_t x4, void *cookie,
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void *handle, uint64_t flags)
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{
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int ret;
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uint32_t ipi_local_id;
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uint32_t ipi_remote_id;
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unsigned int is_secure;
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ipi_local_id = x1 & UNSIGNED32_MASK;
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ipi_remote_id = x2 & UNSIGNED32_MASK;
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if (SMC_ENTITY(smc_fid) >= SMC_ENTITY_TRUSTED_APP)
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is_secure = 1;
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else
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is_secure = 0;
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/* Validate IPI mailbox access */
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ret = ipi_mb_validate(ipi_local_id, ipi_remote_id, is_secure);
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if (ret)
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SMC_RET1(handle, ret);
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switch (SMC_FUNCTION(smc_fid)) {
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case IPI_MAILBOX_OPEN:
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ipi_mb_open(ipi_local_id, ipi_remote_id);
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SMC_RET1(handle, 0);
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case IPI_MAILBOX_RELEASE:
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ipi_mb_release(ipi_local_id, ipi_remote_id);
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SMC_RET1(handle, 0);
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case IPI_MAILBOX_STATUS_ENQUIRY:
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{
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int disable_irq;
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disable_irq = (x3 & IPI_SMC_ENQUIRY_DIRQ_MASK) ? 1 : 0;
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ret = ipi_mb_enquire_status(ipi_local_id, ipi_remote_id);
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if ((ret & IPI_MB_STATUS_RECV_PENDING) && disable_irq)
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ipi_mb_disable_irq(ipi_local_id, ipi_remote_id);
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SMC_RET1(handle, ret);
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}
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case IPI_MAILBOX_NOTIFY:
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{
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uint32_t is_blocking;
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is_blocking = (x3 & IPI_SMC_NOTIFY_BLOCK_MASK) ? 1 : 0;
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ipi_mb_notify(ipi_local_id, ipi_remote_id, is_blocking);
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SMC_RET1(handle, 0);
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}
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case IPI_MAILBOX_ACK:
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{
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int enable_irq;
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enable_irq = (x3 & IPI_SMC_ACK_EIRQ_MASK) ? 1 : 0;
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ipi_mb_ack(ipi_local_id, ipi_remote_id);
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if (enable_irq)
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ipi_mb_enable_irq(ipi_local_id, ipi_remote_id);
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SMC_RET1(handle, 0);
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}
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case IPI_MAILBOX_ENABLE_IRQ:
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ipi_mb_enable_irq(ipi_local_id, ipi_remote_id);
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SMC_RET1(handle, 0);
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case IPI_MAILBOX_DISABLE_IRQ:
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ipi_mb_disable_irq(ipi_local_id, ipi_remote_id);
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SMC_RET1(handle, 0);
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default:
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WARN("Unimplemented IPI service call: 0x%x\n", smc_fid);
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SMC_RET1(handle, SMC_UNK);
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}
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}
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