#ifndef __NIOS2_H__ #define __NIOS2_H__ /****************************************************************************** * * * License Agreement * * * * Copyright (c) 2008 Altera Corporation, San Jose, California, USA. * * All rights reserved. * * * * 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. * * * * This agreement shall be governed in all respects by the laws of the State * * of California and by the laws of the United States of America. * * * ******************************************************************************/ /* * This header provides processor specific macros for accessing the Nios2 * control registers. */ #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /* * Number of available IRQs in internal interrupt controller. */ #define NIOS2_NIRQ 32 /* Size in bits of registers */ #define SYSTEM_BUS_WIDTH 32 #ifndef _ASMLANGUAGE #include #include #include /* * Functions for accessing select Nios II general-purpose registers. */ /* ET (Exception Temporary) register */ static inline u32_t _nios2_read_et(void) { u32_t et; __asm__("mov %0, et" : "=r" (et)); return et; } static inline void _nios2_write_et(u32_t et) { __asm__ volatile("mov et, %z0" : : "rM" (et)); } static inline u32_t _nios2_read_sp(void) { u32_t sp; __asm__("mov %0, sp" : "=r" (sp)); return sp; } /* * Functions for useful processor instructions. */ static inline void _nios2_break(void) { __asm__ volatile("break"); } static inline void _nios2_report_stack_overflow(void) { __asm__ volatile("break 3"); } /* * Low-level cache management functions */ static inline void _nios2_dcache_addr_flush(void *addr) { __asm__ volatile ("flushda (%0)" :: "r" (addr)); } static inline void _nios2_dcache_flush(u32_t offset) { __asm__ volatile ("flushd (%0)" :: "r" (offset)); } static inline void _nios2_icache_flush(u32_t offset) { __asm__ volatile ("flushi %0" :: "r" (offset)); } static inline void _nios2_pipeline_flush(void) { __asm__ volatile ("flushp"); } /* * Functions for reading/writing control registers */ enum nios2_creg { NIOS2_CR_STATUS = 0, NIOS2_CR_ESTATUS = 1, NIOS2_CR_BSTATUS = 2, NIOS2_CR_IENABLE = 3, NIOS2_CR_IPENDING = 4, NIOS2_CR_CPUID = 5, /* 6 is reserved */ NIOS2_CR_EXCEPTION = 7, NIOS2_CR_PTEADDR = 8, NIOS2_CR_TLBACC = 9, NIOS2_CR_TLBMISC = 10, NIOS2_CR_ECCINJ = 11, NIOS2_CR_BADADDR = 12, NIOS2_CR_CONFIG = 13, NIOS2_CR_MPUBASE = 14, NIOS2_CR_MPUACC = 15 }; /* XXX I would prefer to define these as static inline functions for * type checking purposes. However if -O0 is used (i.e. CONFIG_DEBUG is on) * we get errors "Control register number must be in range 0-31 for * __builtin_rdctl" with the following code: * * static inline u32_t _nios2_creg_read(enum nios2_creg reg) * { * return __builtin_rdctl(reg); * } * * This compiles just fine with -Os. */ #define _nios2_creg_read(reg) __builtin_rdctl(reg) #define _nios2_creg_write(reg, val) __builtin_wrctl(reg, val) #define _nios2_get_register_address(base, regnum) \ ((void *)(((u8_t *)base) + ((regnum) * (SYSTEM_BUS_WIDTH / 8)))) static inline void _nios2_reg_write(void *base, int regnum, u32_t data) { sys_write32(data, (mm_reg_t)_nios2_get_register_address(base, regnum)); } static inline u32_t _nios2_reg_read(void *base, int regnum) { return sys_read32((mm_reg_t)_nios2_get_register_address(base, regnum)); } #endif /* _ASMLANGUAGE */ /* * Nios II control registers that are always present */ #define NIOS2_STATUS status #define NIOS2_ESTATUS estatus #define NIOS2_BSTATUS bstatus #define NIOS2_IENABLE ienable #define NIOS2_IPENDING ipending #define NIOS2_CPUID cpuid /* * Bit masks & offsets for Nios II control registers. * The presence and size of a field is sometimes dependent on the Nios II * configuration. Bit masks for every possible field and the maximum size of * that field are defined. * * All bit-masks are expressed relative to the position * of the data with a register. To read data that is LSB- * aligned, the register read data should be masked, then * right-shifted by the designated "OFST" macro value. The * opposite should be used for register writes when starting * with LSB-aligned data. */ /* STATUS, ESTATUS, BSTATUS, and SSTATUS registers */ #define NIOS2_STATUS_PIE_MSK (0x00000001) #define NIOS2_STATUS_PIE_OFST (0) #define NIOS2_STATUS_U_MSK (0x00000002) #define NIOS2_STATUS_U_OFST (1) #define NIOS2_STATUS_EH_MSK (0x00000004) #define NIOS2_STATUS_EH_OFST (2) #define NIOS2_STATUS_IH_MSK (0x00000008) #define NIOS2_STATUS_IH_OFST (3) #define NIOS2_STATUS_IL_MSK (0x000003f0) #define NIOS2_STATUS_IL_OFST (4) #define NIOS2_STATUS_CRS_MSK (0x0000fc00) #define NIOS2_STATUS_CRS_OFST (10) #define NIOS2_STATUS_PRS_MSK (0x003f0000) #define NIOS2_STATUS_PRS_OFST (16) #define NIOS2_STATUS_NMI_MSK (0x00400000) #define NIOS2_STATUS_NMI_OFST (22) #define NIOS2_STATUS_RSIE_MSK (0x00800000) #define NIOS2_STATUS_RSIE_OFST (23) #define NIOS2_STATUS_SRS_MSK (0x80000000) #define NIOS2_STATUS_SRS_OFST (31) /* EXCEPTION register */ #define NIOS2_EXCEPTION_REG_CAUSE_MASK (0x0000007c) #define NIOS2_EXCEPTION_REG_CAUSE_OFST (2) #define NIOS2_EXCEPTION_REG_ECCFTL_MASK (0x80000000) #define NIOS2_EXCEPTION_REG_ECCFTL_OFST (31) /* PTEADDR (Page Table Entry Address) register */ #define NIOS2_PTEADDR_REG_VPN_OFST 2 #define NIOS2_PTEADDR_REG_VPN_MASK 0x3ffffc #define NIOS2_PTEADDR_REG_PTBASE_OFST 22 #define NIOS2_PTEADDR_REG_PTBASE_MASK 0xffc00000 /* TLBACC (TLB Access) register */ #define NIOS2_TLBACC_REG_PFN_OFST 0 #define NIOS2_TLBACC_REG_PFN_MASK 0xfffff #define NIOS2_TLBACC_REG_G_OFST 20 #define NIOS2_TLBACC_REG_G_MASK 0x100000 #define NIOS2_TLBACC_REG_X_OFST 21 #define NIOS2_TLBACC_REG_X_MASK 0x200000 #define NIOS2_TLBACC_REG_W_OFST 22 #define NIOS2_TLBACC_REG_W_MASK 0x400000 #define NIOS2_TLBACC_REG_R_OFST 23 #define NIOS2_TLBACC_REG_R_MASK 0x800000 #define NIOS2_TLBACC_REG_C_OFST 24 #define NIOS2_TLBACC_REG_C_MASK 0x1000000 #define NIOS2_TLBACC_REG_IG_OFST 25 #define NIOS2_TLBACC_REG_IG_MASK 0xfe000000 /* TLBMISC (TLB Miscellaneous) register */ #define NIOS2_TLBMISC_REG_D_OFST 0 #define NIOS2_TLBMISC_REG_D_MASK 0x1 #define NIOS2_TLBMISC_REG_PERM_OFST 1 #define NIOS2_TLBMISC_REG_PERM_MASK 0x2 #define NIOS2_TLBMISC_REG_BAD_OFST 2 #define NIOS2_TLBMISC_REG_BAD_MASK 0x4 #define NIOS2_TLBMISC_REG_DBL_OFST 3 #define NIOS2_TLBMISC_REG_DBL_MASK 0x8 #define NIOS2_TLBMISC_REG_PID_OFST 4 #define NIOS2_TLBMISC_REG_PID_MASK 0x3fff0 #define NIOS2_TLBMISC_REG_WE_OFST 18 #define NIOS2_TLBMISC_REG_WE_MASK 0x40000 #define NIOS2_TLBMISC_REG_RD_OFST 19 #define NIOS2_TLBMISC_REG_RD_MASK 0x80000 #define NIOS2_TLBMISC_REG_WAY_OFST 20 #define NIOS2_TLBMISC_REG_WAY_MASK 0xf00000 #define NIOS2_TLBMISC_REG_EE_OFST 24 #define NIOS2_TLBMISC_REG_EE_MASK 0x1000000 /* ECCINJ (ECC Inject) register */ #define NIOS2_ECCINJ_REG_RF_OFST 0 #define NIOS2_ECCINJ_REG_RF_MASK 0x3 #define NIOS2_ECCINJ_REG_ICTAG_OFST 2 #define NIOS2_ECCINJ_REG_ICTAG_MASK 0xc #define NIOS2_ECCINJ_REG_ICDAT_OFST 4 #define NIOS2_ECCINJ_REG_ICDAT_MASK 0x30 #define NIOS2_ECCINJ_REG_DCTAG_OFST 6 #define NIOS2_ECCINJ_REG_DCTAG_MASK 0xc0 #define NIOS2_ECCINJ_REG_DCDAT_OFST 8 #define NIOS2_ECCINJ_REG_DCDAT_MASK 0x300 #define NIOS2_ECCINJ_REG_TLB_OFST 10 #define NIOS2_ECCINJ_REG_TLB_MASK 0xc00 #define NIOS2_ECCINJ_REG_DTCM0_OFST 12 #define NIOS2_ECCINJ_REG_DTCM0_MASK 0x3000 #define NIOS2_ECCINJ_REG_DTCM1_OFST 14 #define NIOS2_ECCINJ_REG_DTCM1_MASK 0xc000 #define NIOS2_ECCINJ_REG_DTCM2_OFST 16 #define NIOS2_ECCINJ_REG_DTCM2_MASK 0x30000 #define NIOS2_ECCINJ_REG_DTCM3_OFST 18 #define NIOS2_ECCINJ_REG_DTCM3_MASK 0xc0000 /* CONFIG register */ #define NIOS2_CONFIG_REG_PE_MASK (0x00000001) #define NIOS2_CONFIG_REG_PE_OFST (0) #define NIOS2_CONFIG_REG_ANI_MASK (0x00000002) #define NIOS2_CONFIG_REG_ANI_OFST (1) #define NIOS2_CONFIG_REG_ECCEN_MASK (0x00000004) #define NIOS2_CONFIG_REG_ECCEN_OFST (2) #define NIOS2_CONFIG_REG_ECCEXC_MASK (0x00000008) #define NIOS2_CONFIG_REG_ECCEXC_OFST (3) /* MPUBASE (MPU Base Address) Register */ #define NIOS2_MPUBASE_D_MASK (0x00000001) #define NIOS2_MPUBASE_D_OFST (0) #define NIOS2_MPUBASE_INDEX_MASK (0x0000003e) #define NIOS2_MPUBASE_INDEX_OFST (1) #define NIOS2_MPUBASE_BASE_ADDR_MASK (0xffffffc0) #define NIOS2_MPUBASE_BASE_ADDR_OFST (6) /* MPUACC (MPU Access) Register */ #define NIOS2_MPUACC_LIMIT_MASK (0xffffffc0) #define NIOS2_MPUACC_LIMIT_OFST (6) #define NIOS2_MPUACC_MASK_MASK (0xffffffc0) #define NIOS2_MPUACC_MASK_OFST (6) #define NIOS2_MPUACC_C_MASK (0x00000020) #define NIOS2_MPUACC_C_OFST (5) #define NIOS2_MPUACC_PERM_MASK (0x0000001c) #define NIOS2_MPUACC_PERM_OFST (2) #define NIOS2_MPUACC_RD_MASK (0x00000002) #define NIOS2_MPUACC_RD_OFST (1) #define NIOS2_MPUACC_WR_MASK (0x00000001) #define NIOS2_MPUACC_WR_OFST (0) #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* __NIOS2_H__ */