| #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 <stdint.h> |
| #include <arch/cpu.h> |
| #include <sys_io.h> |
| |
| /* |
| * Functions for accessing select Nios II general-purpose registers. |
| */ |
| |
| /* ET (Exception Temporary) register */ |
| static inline uint32_t _nios2_read_et(void) |
| { |
| uint32_t et; |
| |
| __asm__("mov %0, et" : "=r" (et)); |
| return et; |
| } |
| |
| static inline void _nios2_write_et(uint32_t et) |
| { |
| __asm__ volatile("mov et, %z0" : : "rM" (et)); |
| } |
| |
| static inline uint32_t _nios2_read_sp(void) |
| { |
| uint32_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(uint32_t offset) |
| { |
| __asm__ volatile ("flushd (%0)" :: "r" (offset)); |
| } |
| |
| static inline void _nios2_icache_flush(uint32_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 uint32_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 *)(((uint8_t *)base) + ((regnum) * (SYSTEM_BUS_WIDTH / 8)))) |
| |
| static inline void _nios2_reg_write(void *base, int regnum, uint32_t data) |
| { |
| sys_write32(data, (mm_reg_t)_nios2_get_register_address(base, regnum)); |
| } |
| |
| static inline uint32_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__ */ |
