4456b2db29
This patch adds inter-processor interrupt support using K230 mailbox device to improve the RPMsg efficiency. The polling logic has been dropped. Major changes: - in arch/risc-v/include/k230: - irq.h add IRQ for IPI devices - in arch/risc-v/src/k230: - Kconfig add IPI related config, increase polling delay - Make.defs add k230_ipi.c to CHIP_SRCS - k230_hart.c fix typo, add notes of zero MISA reading w/ NUTTSBI - k230_irq.c use K230_PLIC_IRQS as ext IRQ limit to support IPI - k230_rptun.c use IPI instead of polling - in boards/risc-v/k230/canmv230/configs - master enable IPI support - remote enable IPI, TMPFS, RPMSGFS etc New additions: - in arch/risc-v/src/k230: - k230_ipi.h add K230 IPI related defintions - k230_ipi.c add K230 IPI driver Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
156 lines
6.0 KiB
C
156 lines
6.0 KiB
C
/****************************************************************************
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* arch/risc-v/src/k230/k230_ipi.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_RISCV_SRC_K230_K230_IPI_H
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#define __ARCH_RISCV_SRC_K230_K230_IPI_H
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* K230 has 4 IPI devices, each has 10 registers with 32 bit width. */
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#define K230_IPI_DEVN_MAX 3
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#define K230_IPI_LINE_MAX 15
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#define K230_IPI_BASE(n) (0x91104000ul + n * 0x28)
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/* The IPI registers are organized in two directions (M2R or R2M), there are
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* 5 registers for each direction, with 16 IPI lines for each node. Though
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* K230 names the two directions as CPU2DSP or DSP2CPU, we use M2R or R2M.
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*
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* The Status register has 2-bit counter for each IPI line.
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* The Set/Clear registers accepts values from 0..15 for 16 IPI lines.
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* Setting a line increases its counter by 1, clearing the line decreases it
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* by 1. The Error register further uses the high/low 16 bits to flag the
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* over/under-run situations of counters.
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*
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* The Enable register's bit 16..31 are for line enable, bit 0 is for device
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* interrupt enable, bit 1 for resetting line counters to zero.
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*
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* Also note the directions M2R/R2M are tied to the CPU cores: little core is
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* M and big core is R. So we can also select the direction based on current
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* core, but due to that we can't read correct MISA register value with NSBI
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* booting environment, that method is not used and the role is passed in.
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*/
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#define K230_IPI_M2R_INTEN(n) (K230_IPI_BASE(n) + 0)
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#define K230_IPI_M2R_INTSET(n) (K230_IPI_BASE(n) + 4)
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#define K230_IPI_M2R_INTCLR(n) (K230_IPI_BASE(n) + 8)
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#define K230_IPI_M2R_INTSTS(n) (K230_IPI_BASE(n) + 12)
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#define K230_IPI_M2R_INTERR(n) (K230_IPI_BASE(n) + 16)
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#define K230_IPI_R2M_INTEN(n) (K230_IPI_BASE(n) + 20)
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#define K230_IPI_R2M_INTSET(n) (K230_IPI_BASE(n) + 24)
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#define K230_IPI_R2M_INTCLR(n) (K230_IPI_BASE(n) + 28)
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#define K230_IPI_R2M_INTSTS(n) (K230_IPI_BASE(n) + 32)
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#define K230_IPI_R2M_INTERR(n) (K230_IPI_BASE(n) + 36)
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#define IPI_ROLE_MASTER 1 /* master role, for little core */
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#define IPI_ROLE_REMOTE 2 /* remote role, for big core */
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/* Tools for handling uint16_t device and line id combo */
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#define IPI_DEVN(x) ((x & 0xFF00) >> 8)
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#define IPI_LINE(x) (x & 0xFF)
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#define IPI_COMB(d,l) ((d << 8) | (l & 0xFF))
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/****************************************************************************
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* Public types
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****************************************************************************/
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/****************************************************************************
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* Name: ipi_callback_t
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* Description:
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* Callback for a particular IPI line. Should be brief as maybe running in
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* ISR context.
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* Params;
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* comb: combined IPI dev and line ids, see IPI_COMB above
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* args: the args used in subscription
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****************************************************************************/
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typedef void (*ipi_callback_t)(uint16_t comb, void *args);
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/****************************************************************************
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* Public functions
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****************************************************************************/
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/****************************************************************************
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* Name: k230_ipi_init
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* Description:
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* Initialzie IPI device with receiving and sending line masks.
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* Params:
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* devn: IPI device number in 0..K230_IPI_DEVN_MAX
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* mask: allowed lines mask for notifying peers or receiving notifications
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* role: IPI role of this node (IPI_ROLE_MASTER or IPI_ROLE_REMOTE)
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* ipcb: callback for incoming IPI notifications
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* args: last parameter for the callback.
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* Returns:
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* 0 on success, or negative value on errors
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****************************************************************************/
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int k230_ipi_init(uintptr_t devn, uint16_t mask, uint16_t role,
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ipi_callback_t ipcb, void *args);
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/****************************************************************************
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* Name: k230_ipi_notify
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* Description:
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* Notify peers via IPI.
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* Params:
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* devn: device id in 0..K230_IPI_DEVN_MAX
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* line: line id in 0..K230_IPI_LINE_MAX
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****************************************************************************/
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void k230_ipi_notify(uint8_t devn, uint8_t line);
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/****************************************************************************
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* Name: k230_ipi_finish
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* Description:
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* Deinitializes IPI device
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* Params:
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* devn: IPI device number initialized previously.
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* mask: line masks iniitialied previously.
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****************************************************************************/
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void k230_ipi_finish(uint8_t devn, uint16_t mask);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_RISCV_SRC_K230_K230_IPI_H */
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