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#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__ */