PIC32MZ: Add beginnings of CPU initialization logic. Still some bad logic for setting up peripheral clocking
This commit is contained in:
Gregory Nutt
parent
39191816f6
commit
d8874e37bd
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@ -189,7 +189,7 @@ extern "C"
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void pic32mx_lowinit(void);
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/************************************************************************************
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* Name: pic32mx_lowsetup
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* Name: pic32mx_consoleinit
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*
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* Description:
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* Performs low level initialization of the console UART. This UART done early so
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@ -64,5 +64,6 @@ endif
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# Required PIC32MZ files
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CHIP_ASRCS =
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CHIP_CSRCS = pic32mz-lowinit.c
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# Configuration-dependent PIC32MZ files
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@ -42,10 +42,10 @@
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#include <nuttx/config.h>
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#if defined(CHIP_PIC32MZEC)
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# include <chip/pic32mzec-memorymap.h>
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#if defined(CONFIG_ARCH_CHIP_PIC32MZEC)
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# include "chip/pic32mzec-memorymap.h"
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#else
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# error "Unknown PIC32MZ family
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# error Unknown PIC32MZ family
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#endif
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#endif /* __ARCH_MIPS_SRC_PIC32MZ_CHIP_PIC32MZ_MEMORYMAP_H */
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@ -0,0 +1,82 @@
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/********************************************************************************************
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* arch/mips/src/pic32mz/chip/pic32mz-prefetch.h
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
|
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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********************************************************************************************/
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#ifndef __ARCH_MIPS_SRC_PIC32MZ_CHIP_PIC32MZ_PREFETCH_H
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#define __ARCH_MIPS_SRC_PIC32MZ_CHIP_PIC32MZ_PREFETCH_H
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/********************************************************************************************
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* Included Files
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********************************************************************************************/
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#include <nuttx/config.h>
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#include "pic32mz-memorymap.h"
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/********************************************************************************************
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* Pre-processor Definitions
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********************************************************************************************/
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/* Prefetch register offsets ****************************************************************/
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#define PIC32MZ_PREFETCH_PRECON_OFFSET 0x0000 /* Prefetch module control register */
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#define PIC32MZ_PREFETCH_PRESTAT_OFFSET 0x0000 /* Prefetch module status register */
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/* Prefetch register addresses **************************************************************/
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#define PIC32MZ_PREFETCH_PRECON (PIC32MZ_PREFETCH_K1BASE+PIC32MZ_PREFETCH_PRECON_OFFSET)
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#define PIC32MZ_PREFETCH_PRESTAT (PIC32MZ_PREFETCH_K1BASE+PIC32MZ_PREFETCH_PRESTAT_OFFSET)
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/* Prefetch register bit field definitions **************************************************/
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/* Prefetch module control register */
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#define PREFETCH_PRECON_PFMWS_SHIFT (0) /* Bits 0-2: PFM Access Time */
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#define PREFETCH_PRECON_PFMWS_MASK (7 << PREFETCH_PRECON_PFMWS_SHIFT)
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# define PREFETCH_PRECON_PFMWS(n) ((uint32_t)(n) << PREFETCH_PRECON_PFMWS_SHIFT) /* n wait states, n=0..7 */
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#define PREFETCH_PRECON_PREFEN_SHIFT (4) /* Bit 4-5: Predictive Prefetch Enable */
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#define PREFETCH_PRECON_PREFEN_MASK (3 << PREFETCH_PRECON_PREFEN_SHIFT)
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# define PREFETCH_PRECON_PREFEN_DISABLE (0 << PREFETCH_PRECON_PREFEN_SHIFT) /* Disable predictive prefetch */
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# define PREFETCH_PRECON_PREFEN_CPUI (1 << PREFETCH_PRECON_PREFEN_SHIFT) /* Predictive prefetch CPU instructions */
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# define PREFETCH_PRECON_PREFEN_CPUID (2 << PREFETCH_PRECON_PREFEN_SHIFT) /* Predictive prefetch CPU instructions and data */
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# define PREFETCH_PRECON_PREFEN_ANY (3 << PREFETCH_PRECON_PREFEN_SHIFT) /* Predictive prefetch any address */
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#define PREFETCH_PRECON_PFMSECEN (1 << 26) /* Bit 26: Flash SEC Interrupt Enable */
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/* Prefetch module status register */
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#define PREFETCH_PRESTAT_PFMSECCNT_SHIFT (0) /* Bits 0-7: Flash SEC Count bits */
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#define PREFETCH_PRESTAT_PFMSECCNT_MASK (0xff << PREFETCH_PRESTAT_PFMSECCNT_SHIFT)
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#define PREFETCH_PRESTAT_PFMSEC (1 << 26) /* Bit 26: Flash Single-bit Error Corrected Status */
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#define PREFETCH_PRESTAT_PFMDED (1 << 27) /* Bit 27: Flash Double-bit Error Detected Status */
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#endif /* __ARCH_MIPS_SRC_PIC32MZ_CHIP_PIC32MZ_PREFETCH_H */
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@ -0,0 +1,123 @@
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/************************************************************************************
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* arch/mips/src/pic32mz/pic32mz-lowconsole.h
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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||||
* notice, this list of conditions and the following disclaimer in
|
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_MIPS_SRC_PIC32MZ_PIC32MZ_LOWCONSOLE_H
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#define __ARCH_MIPS_SRC_PIC32MZ_PIC32MZ_LOWCONSOLE_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <stdint.h>
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#include <stdbool.h>
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/************************************************************************************
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* Public Types
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************************************************************************************/
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#ifndef __ASSEMBLY__
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/************************************************************************************
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* Public Data
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************************************************************************************/
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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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* Public Function Prototypes
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************************************************************************************/
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/************************************************************************************
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* Name: pic32mz_consoleinit
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*
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* Description:
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* Performs low level initialization of the console UART. This UART done early so
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* that the serial console is available for debugging very early in the boot
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* sequence.
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*
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************************************************************************************/
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#ifdef HAVE_SERIAL_CONSOLE
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void pic32mz_consoleinit(void);
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#else
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# define pic32mz_consoleinit()
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#endif
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/******************************************************************************
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* Name: pic32mz_uartreset
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*
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* Description:
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* Reset a UART.
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*
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******************************************************************************/
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#ifdef HAVE_UART_DEVICE
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void pic32mz_uartreset(uintptr_t uart_base);
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#endif
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/******************************************************************************
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* Name: pic32mz_uartconfigure
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*
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* Description:
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* Configure a UART as a RS-232 UART.
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*
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******************************************************************************/
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#ifdef HAVE_UART_DEVICE
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void pic32mz_uartconfigure(uintptr_t uart_base, uint32_t baudrate,
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unsigned int parity, unsigned int nbits, bool stop2);
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#endif
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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_MIPS_SRC_PIC32MZ_PIC32MZ_LOWCONSOLE_H */
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@ -0,0 +1,209 @@
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/****************************************************************************
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* arch/mips/src/pic32/pic32mz-lowinit.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
|
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* notice, this list of conditions and the following disclaimer.
|
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* 2. Redistributions in binary form must reproduce the above copyright
|
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* notice, this list of conditions and the following disclaimer in
|
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
|
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* used to endorse or promote products derived from this software
|
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <arch/pic32mz/cp0.h>
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#include <arch/board/board.h>
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#include "up_internal.h"
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#include "up_arch.h"
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#include "chip/pic32mz-prefetch.h"
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#include "pic32mz-lowconsole.h"
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#include "pic32mz-lowinit.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Maximum Frequencies ******************************************************/
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#define MAX_FLASH_ECC_HZ 66000000 /* Maximum FLASH speed (Hz) with ECC */
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#define MAX_FLASH_NOECC_HZ 83000000 /* Maximum FLASH speed (Hz) without ECC */
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#define MAX_PBCLOCK 80000000 /* Max peripheral bus speed (Hz) */
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/* Sanity checks ************************************************************/
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/* Make sure that the selected clock parameters are sane */
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#define CALC_SYSCLOCK (((BOARD_PLL_INPUT / BOARD_PLL_IDIV) * BOARD_PLL_MULT) / BOARD_PLL_ODIV)
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#if CALC_SYSCLOCK != BOARD_CPU_CLOCK
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# error "Bad BOARD_CPU_CLOCK calculcation in board.h"
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#endif
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#define CALC_PBCLOCK (CALC_SYSCLOCK / BOARD_PBDIV)
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#if CALC_PBCLOCK != BOARD_PBCLOCK
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# error "Bad BOARD_PBCLOCK calculcation in board.h"
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#endif
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#if CALC_PBCLOCK > MAX_PBCLOCK
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# error "PBCLOCK exceeds maximum value"
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Global Variables
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pic32mz_prefetch
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*
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* Description:
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* Configure the prefetch module setting:
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*
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* 1. The optimal number of FLASH wait states.
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* 2. Enable prefetch on CPU instructions and data
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*
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* Assumptions:
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* Interrupts are disabled.
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*
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****************************************************************************/
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static inline void pic32mz_prefetch(void)
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{
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unsigned int nwaits;
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unsigned int residual;
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uint32_t regval;
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/* Configure pre-fetch cache FLASH wait states (assuming ECC is enabled) */
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residual = BOARD_CPU_CLOCK;
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nwaits = 0;
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while (residual > MAX_FLASH_ECC_HZ)
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{
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nwaits++;
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residual -= MAX_FLASH_ECC_HZ;
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}
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DEBUGASSERT(nwaits < 8);
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/* Set the FLASH wait states and enabled prefetch on CPU instructions and
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* data.
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*/
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regval = (PREFETCH_PRECON_PREFEN_CPUID | PREFETCH_PRECON_PFMWS(nwaits));
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putreg32(regval, PIC32MZ_PREFETCH_PRECON);
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}
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/****************************************************************************
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* Name: pic32mz_k0cache
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*
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* Description:
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* Enable caching in KSEG0.
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*
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* Assumptions:
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* Interrupts are disabled.
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*
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****************************************************************************/
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static inline void pic32mz_k0cache(void)
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{
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register uint32_t regval;
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/* Enable cache on KSEG 0 in the CP0 CONFIG register*/
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asm("\tmfc0 %0,$16,0\n" : "=r"(regval));
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regval &= ~CP0_CONFIG_K23_MASK;
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regval |= CP0_CONFIG_K23_CACHEABLE;
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asm("\tmtc0 %0,$16,0\n" : : "r" (regval));
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UNUSED(regval);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pic32mz_lowinit
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*
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* Description:
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* This performs basic low-level initialization of the system.
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*
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* Assumptions:
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* Interrupts have not yet been enabled.
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*
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****************************************************************************/
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void pic32mz_lowinit(void)
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{
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/* Initialize FLASH wait states */
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pic32mz_prefetch();
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/* Enable caching in KSEG0 */
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pic32mz_k0cache();;
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/* Initialize a console (probably a serial console) */
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pic32mz_consoleinit();
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/* Perform early serial initialization (so that we will have debug output
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* available as soon as possible).
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*/
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#ifdef USE_EARLYSERIALINIT
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up_earlyserialinit();
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#endif
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/* Perform board-level initialization */
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pic32mz_boardinitialize();
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}
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@ -0,0 +1,102 @@
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/************************************************************************************
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* arch/mips/src/pic32mz/pic32mz-lowinit.h
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
|
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*
|
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. 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.
|
||||
* 3. Neither the name NuttX 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 OWNER 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.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
#ifndef __ARCH_MIPS_SRC_PIC32MZ_PIC32MZ_LOWINIT_H
|
||||
#define __ARCH_MIPS_SRC_PIC32MZ_PIC32MZ_LOWINIT_H
|
||||
|
||||
/************************************************************************************
|
||||
* Included Files
|
||||
************************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
#include <nuttx/compiler.h>
|
||||
|
||||
#include <stdbool.h>
|
||||
|
||||
/************************************************************************************
|
||||
* Pre-processor Definitions
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Types
|
||||
************************************************************************************/
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
/************************************************************************************
|
||||
* Public Data
|
||||
************************************************************************************/
|
||||
|
||||
#undef EXTERN
|
||||
#if defined(__cplusplus)
|
||||
#define EXTERN extern "C"
|
||||
extern "C"
|
||||
{
|
||||
#else
|
||||
#define EXTERN extern
|
||||
#endif
|
||||
|
||||
/************************************************************************************
|
||||
* Public Function Prototypes
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Name: pic32mz_lowinit
|
||||
*
|
||||
* Description:
|
||||
* This performs basic low-level initialization of the system.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
void pic32mz_lowinit(void);
|
||||
|
||||
/************************************************************************************
|
||||
* Name: pic32mz_boardinitialize
|
||||
*
|
||||
* Description:
|
||||
* This function must be provided by the board-specific logic in the directory
|
||||
* <nuttx>/configs/<board-name>/pic32mz_boot.c.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
void pic32mz_boardinitialize(void);
|
||||
|
||||
#undef EXTERN
|
||||
#if defined(__cplusplus)
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
#endif /* __ARCH_MIPS_SRC_PIC32MZ_PIC32MZ_LOWINIT_H */
|
||||
Loading…
Reference in New Issue