/************************************************************************************ * arch/arm/src/armv7-a/sctlr.h * CP15 System Control Registers * * Copyright (C) 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * References: * * "Cortex-A5™ MPCore, Technical Reference Manual", Revision: r0p1, Copyright © 2010 * ARM. All rights reserved. ARM DDI 0434B (ID101810) * "ARM® Architecture Reference Manual, ARMv7-A and ARMv7-R edition", Copyright © * 1996-1998, 2000, 2004-2012 ARM. All rights reserved. ARM DDI 0406C.b (ID072512) * * 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_ARM_SRC_ARMV7_A_SCTLR_H #define __ARCH_ARM_SRC_ARMV7_A_SCTLR_H /************************************************************************************ * Included Files ************************************************************************************/ /************************************************************************************ * Pre-processor Definitions ************************************************************************************/ /* Reference: Cortex-A5™ MPCore Paragraph 4.2, "Register summary." */ /* Main ID Register (MIDR) */ /* TODO: To be provided */ /* Cache Type Register (CTR) */ /* TODO: To be provided */ /* TCM Type Register * * The Cortex-A5 MPCore processor does not implement instruction or data Tightly * Coupled Memory (TCM), so this register always Reads-As-Zero (RAZ). * * TLB Type Register * * The Cortex-A5 MPCore processor does not implement instruction or data Tightly * CoupledMemory (TCM), so this register always Reads-As-Zero (RAZ). */ /* Multiprocessor Affinity Register (MPIDR) */ /* TODO: To be provided */ /* Processor Feature Register 0 (ID_PFR0) */ /* TODO: To be provided */ /* Processor Feature Register 1 (ID_PFR1) */ /* TODO: To be provided */ /* Debug Feature Register 0 (ID_DFR0) */ /* TODO: To be provided */ /* Auxiliary Feature Register 0 (ID_AFR0) */ /* TODO: To be provided */ /* Memory Model Features Register 0 (ID_MMFR0) */ /* Memory Model Features Register 1 (ID_MMFR1) */ /* Memory Model Features Register 2 (ID_MMFR2) */ /* Memory Model Features Register 3 (ID_MMFR3) */ /* TODO: To be provided */ /* Instruction Set Attributes Register 0 (ID_ISAR0) */ /* Instruction Set Attributes Register 1 (ID_ISAR1) */ /* Instruction Set Attributes Register 2 (ID_ISAR2) */ /* Instruction Set Attributes Register 3 (ID_ISAR3) */ /* Instruction Set Attributes Register 4 (ID_ISAR4) */ /* Instruction Set Attributes Register 5 (ID_ISAR5) */ /* Instruction Set Attributes Register 6-7 (ID_ISAR6-7). Reserved. */ /* TODO: Others to be provided */ /* Cache Size Identification Register (CCSIDR) */ /* TODO: To be provided */ /* Cache Level ID Register (CLIDR) */ /* TODO: To be provided */ /* Auxiliary ID Register (AIDR) */ /* TODO: To be provided */ /* Cache Size Selection Register (CSSELR) */ /* TODO: To be provided */ /* System Control Register (SCTLR) * * NOTES: * (1) Always enabled on A5 * (2) Not available on A5 */ #define SCTLR_M (1 << 0) /* Bit 0: Enables the MMU */ #define SCTLR_A (1 << 1) /* Bit 1: Enables strict alignment of data */ #define SCTLR_C (1 << 2) /* Bit 2: Determines if data can be cached */ /* Bits 3-9: Reserved */ #define SCTLR_SW (1 << 10) /* Bit 10: SWP/SWPB Enable bit */ #define SCTLR_Z (1 << 11) /* Bit 11: Program flow prediction control (1) */ #define SCTLR_I (1 << 12) /* Bit 12: Determines if instructions can be cached */ #define SCTLR_V (1 << 13) /* Bit 13: Vectors bit */ #define SCTLR_RR (1 << 14) /* Bit 14: Cache replacement strategy (2) */ /* Bits 15-16: Reserved */ #define SCTLR_HA (1 << 17) /* Bit 17: Hardware management access disabled (2) */ /* Bits 18-24: Reserved */ #define SCTLR_EE (1 << 25) /* Bit 25: Determines the value the CPSR.E */ /* Bits 26-27: Reserved */ #define SCTLR_TRE (1 << 28) /* Bit 28: TEX remap */ #define SCTLR_AFE (1 << 29) /* Bit 29: Access Flag Enable bit */ #define SCTLR_TE (1 << 30) /* Bit 30: Thumb exception enable */ /* Bit 31: Reserved */ /* Auxiliary Control Register (ACTLR) */ /* TODO: To be provided */ /* Coprocessor Access Control Register (CPACR) */ /* TODO: To be provided */ /* Secure Configuration Register (SCR) */ /* TODO: To be provided */ /* Secure Debug Enable Register (SDER) */ /* TODO: To be provided */ /* Non-secure Access Control Register (NSACR) */ /* Bits 0-9: Reserved */ #define NSACR_CP10 (1 << 10) /* Bit 10: Permission to access coprocessor 10 */ #define NSACR_CP11 (1 << 11) /* Bit 11: Permission to access coprocessor 11 */ /* Bits 12-13: Reserved */ #define NSACR_NSD32DIS (1 << 14) /* Bit 14: Disable the Non-secure use of VFP D16-D31 */ #define NSACR_NSASEDIS (1 << 15) /* Bit 15: Disable Non-secure Advanced SIMD Extension */ /* Bits 16-17: Reserved */ #define NSACR_NSSMP (1 << 18) /* Bit 18: ACR SMP bit writable */ /* Bits 19-31: Reserved */ /* Virtualization Control Register (VCR) */ /* TODO: To be provided */ /* Translation Table Base Register 0 (TTBR0). See mmu.h */ /* Translation Table Base Register 1 (TTBR1). See mmu.h */ /* Translation Table Base Control Register (TTBCR). See mmu.h */ /* Domain Access Control Register (DACR). See mmu.h */ /* Data Fault Status Register (DFSR). See mmu.h */ /* Instruction Fault Status Register (IFSR). See mmu.h */ /* Auxiliary Data Fault Status Register (ADFSR). Not used in this implementation. */ /* Data Fault Address Register(DFAR) * * Holds the MVA of the faulting address when a synchronous fault occurs * * Instruction Fault Address Register(IFAR) * * Holds the MVA of the faulting address of the instruction that caused a prefetch * abort. * * NOP Register * * The use of this register is optional and deprecated. Use the NOP instruction * instead. * * Physical Address Register (PAR) * * Holds: * - the PA after a successful translation * - the source of the abort for an unsuccessful translation * * Instruction Synchronization Barrier * * The use of ISB is optional and deprecated. Use the instruction ISB instead. * * Data Memory Barrier * The use of DMB is deprecated and, on Cortex-A5 MPCore, behaves as NOP. Use the * instruction DMB instead. */ /* Vector Base Address Register (VBAR) */ #define VBAR_MASK (0xffffffe0) /* Monitor Vector Base Address Register (MVBAR) */ /* TODO: To be provided */ /* Interrupt Status Register (ISR) */ /* TODO: To be provided */ /* Virtualization Interrupt Register (VIR) */ /* TODO: To be provided */ /* Context ID Register (CONTEXTIDR) */ #define CONTEXTIDR_ASID_SHIFT (0) /* Bits 0-7: Address Space Identifier */ #define CONTEXTIDR_ASID_MASK (0xff << CONTEXTIDR_ASID_SHIFT) #define CONTEXTIDR_PROCID_SHIFT (8) /* Bits 8-31: Process Identifier */ #define CONTEXTIDR_PROCID_MASK (0x00ffffff << CONTEXTIDR_PROCID_SHIFT) /* Configuration Base Address Register (CBAR) */ /* TODO: To be provided */ /************************************************************************************ * Assemby Macros ************************************************************************************/ #ifdef __ASSEMBLY__ /* Get the device ID */ .macro cp15_rdid, id mrc p15, 0, \id, c0, c0, 0 .endm /* Read/write the system control register (SCTLR) */ .macro cp15_rdsctlr, sctlr mrc p15, 0, \sctlr, c1, c0, 0 .endm .macro cp15_wrsctlr, sctlr mcr p15, 0, \sctlr, c1, c0, 0 nop nop nop nop nop nop nop nop .endm #endif /* __ASSEMBLY__ */ /************************************************************************************ * Inline Functions ************************************************************************************/ #ifndef __ASSEMBLY__ /* Get the device ID */ static inline unsigned int cp15_rdid(void) { unsigned int id; __asm__ __volatile__ ( "\tmrc p15, 0, %0, c0, c0, 0" : "=r" (id) : : "memory" ); return id; } /* Read/write the system control register (SCTLR) */ static inline unsigned int cp15_rdsctlr(void) { unsigned int sctlr; __asm__ __volatile__ ( "\tmrc p15, 0, %0, c1, c0, 0\n" : "=r" (sctlr) : : "memory" ); return sctlr; } static inline void cp15_wrsctlr(unsigned int sctlr) { __asm__ __volatile__ ( "\tmcr p15, 0, %0, c1, c0, 0\n" "\tnop\n" "\tnop\n" "\tnop\n" "\tnop\n" "\tnop\n" "\tnop\n" "\tnop\n" "\tnop\n" : : "r" (sctlr) : "memory" ); } /* Read/write the vector base address register (VBAR) */ static inline unsigned int cp15_rdvbar(void) { unsigned int sctlr; __asm__ __volatile__ ( "\tmrc p15, 0, %0, c12, c0, 0\n" : "=r" (sctlr) : : "memory" ); return sctlr; } static inline void cp15_wrvbar(unsigned int sctlr) { __asm__ __volatile__ ( "\tmcr p15, 0, %0, c12, c0, 0\n" : : "r" (sctlr) : "memory" ); } #endif /* __ASSEMBLY__ */ /**************************************************************************** * Public Variables ****************************************************************************/ /**************************************************************************** * Public Function Prototypes ****************************************************************************/ #ifndef __ASSEMBLY__ #ifdef __cplusplus #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif #undef EXTERN #ifdef __cplusplus } #endif #endif /* __ASSEMBLY__ */ #endif /* __ARCH_ARM_SRC_ARMV7_A_SCTLR_H */