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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @file scb.h
* @brief System control block header
*/
#include "libmaple_types.h"
#ifndef _SCB_H_
#define _SCB_H_
/*
* Register map and base pointer
*/
/** System control block register map type */
typedef struct scb_reg_map {
__io uint32 CPUID; /**< CPU ID Base Register */
__io uint32 ICSR; /**< Interrupt Control State Register */
__io uint32 VTOR; /**< Vector Table Offset Register */
__io uint32 AIRCR; /**< Application Interrupt / Reset Control Register */
__io uint32 SCR; /**< System Control Register */
__io uint32 CCR; /**< Configuration and Control Register */
__io uint8 SHP[12]; /**< System Handler Priority Registers
(4-7, 8-11, 12-15) */
__io uint32 SHCSR; /**< System Handler Control and State Register */
__io uint32 CFSR; /**< Configurable Fault Status Register */
__io uint32 HFSR; /**< Hard Fault Status Register */
/* DFSR is not documented by ST in PM0056 (as of Revision 4), but
* there's a 4 byte hole in the SCB register map docs right where
* it belongs. Since it's specified as "always implemented" in
* the ARM v7-M ARM, I'm assuming its absence is a bug in the ST
* doc, but I haven't proven it. [mbolivar] */
__io uint32 DFSR; /**< Debug Fault Status Register */
__io uint32 MMFAR; /**< Mem Manage Address Register */
__io uint32 BFAR; /**< Bus Fault Address Register */
#if 0
/* The following registers are implementation-defined according to
* ARM v7-M, and I can't find evidence of their existence in ST's
* docs. I'm removing them. Feel free to yell at me if they do
* exist. [mbolivar]
*/
__io uint32 AFSR; /**< Auxiliary Fault Status Register */
__io uint32 PFR[2]; /**< Processor Feature Register */
__io uint32 DFR; /**< Debug Feature Register */
__io uint32 AFR; /**< Auxiliary Feature Register */
__io uint32 MMFR[4]; /**< Memory Model Feature Register */
__io uint32 ISAR[5]; /**< ISA Feature Register */
#endif
} scb_reg_map;
/** System control block register map base pointer */
#define SCB_BASE ((struct scb_reg_map*)0xE000ED00)
/*
* Register bit definitions
*/
/* No SCB_REG_FIELD_BIT macros as the relevant addresses are not in a
* bit-band region. */
/* CPUID base register (SCB_CPUID) */
#define SCB_CPUID_IMPLEMENTER (0xFF << 24)
#define SCB_CPUID_VARIANT (0xF << 20)
#define SCB_CPUID_CONSTANT (0xF << 16)
#define SCB_CPUID_PARTNO (0xFFF << 4)
#define SCB_CPUID_REVISION 0xF
/* Interrupt control state register (SCB_ICSR) */
#define SCB_ICSR_NMIPENDSET BIT(31)
#define SCB_ICSR_PENDSVSET BIT(28)
#define SCB_ICSR_PENDSVCLR BIT(27)
#define SCB_ICSR_PENDSTSET BIT(26)
#define SCB_ICSR_PENDSTCLR BIT(25)
#define SCB_ICSR_ISRPENDING BIT(22)
#define SCB_ICSR_VECTPENDING (0x3FF << 12)
#define SCB_ICSR_RETOBASE BIT(11)
#define SCB_ICSR_VECTACTIVE 0xFF
/* Vector table offset register (SCB_VTOR) */
#define SCB_VTOR_TBLOFF (0x1FFFFF << 9)
/* Application interrupt and reset control register (SCB_AIRCR) */
#define SCB_AIRCR_VECTKEYSTAT (0x5FA << 16)
#define SCB_AIRCR_VECTKEY (0x5FA << 16)
#define SCB_AIRCR_ENDIANNESS BIT(15)
#define SCB_AIRCR_PRIGROUP (0x3 << 8)
#define SCB_AIRCR_SYSRESETREQ BIT(2)
#define SCB_AIRCR_VECTCLRACTIVE BIT(1)
#define SCB_AIRCR_VECTRESET BIT(0)
/* System control register (SCB_SCR) */
#define SCB_SCR_SEVONPEND BIT(4)
#define SCB_SCR_SLEEPDEEP BIT(2)
#define SCB_SCR_SLEEPONEXIT BIT(1)
/* Configuration and Control Register (SCB_CCR) */
#define SCB_CCR_STKALIGN BIT(9)
#define SCB_CCR_BFHFNMIGN BIT(8)
#define SCB_CCR_DIV_0_TRP BIT(4)
#define SCB_CCR_UNALIGN_TRP BIT(3)
#define SCB_CCR_USERSETMPEND BIT(1)
#define SCB_CCR_NONBASETHRDENA BIT(0)
/* System handler priority registers (SCB_SHPRx) */
#define SCB_SHPR1_PRI6 (0xFF << 16)
#define SCB_SHPR1_PRI5 (0xFF << 8)
#define SCB_SHPR1_PRI4 0xFF
#define SCB_SHPR2_PRI11 (0xFF << 24)
#define SCB_SHPR3_PRI15 (0xFF << 24)
#define SCB_SHPR3_PRI14 (0xFF << 16)
/* System Handler Control and state register (SCB_SHCSR) */
#define SCB_SHCSR_USGFAULTENA BIT(18)
#define SCB_SHCSR_BUSFAULTENA BIT(17)
#define SCB_SHCSR_MEMFAULTENA BIT(16)
#define SCB_SHCSR_SVCALLPENDED BIT(15)
#define SCB_SHCSR_BUSFAULTPENDED BIT(14)
#define SCB_SHCSR_MEMFAULTPENDED BIT(13)
#define SCB_SHCSR_USGFAULTPENDED BIT(12)
#define SCB_SHCSR_SYSTICKACT BIT(11)
#define SCB_SHCSR_PENDSVACT BIT(10)
#define SCB_SHCSR_MONITORACT BIT(8)
#define SCB_SHCSR_SVCALLACT BIT(7)
#define SCB_SHCSR_USGFAULTACT BIT(3)
#define SCB_SHCSR_BUSFAULTACT BIT(1)
#define SCB_SHCSR_MEMFAULTACT BIT(0)
/* Configurable fault status register (SCB_CFSR) */
#define SCB_CFSR_DIVBYZERO BIT(25)
#define SCB_CFSR_UNALIGNED BIT(24)
#define SCB_CFSR_NOCP BIT(19)
#define SCB_CFSR_INVPC BIT(18)
#define SCB_CFSR_INVSTATE BIT(17)
#define SCB_CFSR_UNDEFINSTR BIT(16)
#define SCB_CFSR_BFARVALID BIT(15)
#define SCB_CFSR_STKERR BIT(12)
#define SCB_CFSR_UNSTKERR BIT(11)
#define SCB_CFSR_IMPRECISERR BIT(10)
#define SCB_CFSR_PRECISERR BIT(9)
#define SCB_CFSR_IBUSERR BIT(8)
#define SCB_CFSR_MMARVALID BIT(7)
#define SCB_CFSR_MSTKERR BIT(4)
#define SCB_CFSR_MUNSTKERR BIT(3)
#define SCB_CFSR_DACCVIOL BIT(1)
#define SCB_CFSR_IACCVIOL BIT(0)
/* Hard Fault Status Register (SCB_HFSR) */
#define SCB_HFSR_DEBUG_VT BIT(31)
#define SCB_CFSR_FORCED BIT(30)
#define SCB_CFSR_VECTTBL BIT(1)
/* Debug Fault Status Register */
/* Not specified by PM0056, but required by ARM. The bit definitions
* here are based on the names given in the ARM v7-M ARM. */
#define SCB_DFSR_EXTERNAL BIT(4)
#define SCB_DFSR_VCATCH BIT(3)
#define SCB_DFSR_DWTTRAP BIT(2)
#define SCB_DFSR_BKPT BIT(1)
#define SCB_DFSR_HALTED BIT(0)
#endif
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