/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>
 */

#ifndef _ASM_NIOS2_REGISTERS_H
#define _ASM_NIOS2_REGISTERS_H

#ifndef __ASSEMBLER__
#include <asm/cpuinfo.h>
#endif

/* control register numbers */
#define CTL_FSTATUS     0
#define CTL_ESTATUS     1
#define CTL_BSTATUS     2
#define CTL_IENABLE     3
#define CTL_IPENDING    4
#define CTL_CPUID       5
#define CTL_RSV1        6
#define CTL_EXCEPTION   7
#define CTL_PTEADDR     8
#define CTL_TLBACC      9
#define CTL_TLBMISC     10
#define CTL_RSV2        11
#define CTL_BADADDR     12
#define CTL_CONFIG      13
#define CTL_MPUBASE     14
#define CTL_MPUACC      15

/* access control registers using GCC builtins */
#define RDCTL(r)        __builtin_rdctl(r)
#define WRCTL(r, v)     __builtin_wrctl(r, v)

/* status register bits */
#define STATUS_PIE      (1 << 0)        /* processor interrupt enable */
#define STATUS_U        (1 << 1)        /* user mode */
#define STATUS_EH       (1 << 2)        /* Exception mode */

/* estatus register bits */
#define ESTATUS_EPIE    (1 << 0)        /* processor interrupt enable */
#define ESTATUS_EU      (1 << 1)        /* user mode */
#define ESTATUS_EH      (1 << 2)        /* Exception mode */

/* tlbmisc register bits */
#define TLBMISC_PID_SHIFT       4
#ifndef __ASSEMBLER__
#define TLBMISC_PID_MASK        ((1UL << cpuinfo.tlb_pid_num_bits) - 1)
#endif
#define TLBMISC_WAY_MASK        0xf
#define TLBMISC_WAY_SHIFT       20

#define TLBMISC_PID     (TLBMISC_PID_MASK << TLBMISC_PID_SHIFT) /* TLB PID */
#define TLBMISC_WE      (1 << 18)       /* TLB write enable */
#define TLBMISC_RD      (1 << 19)       /* TLB read */
#define TLBMISC_WAY     (TLBMISC_WAY_MASK << TLBMISC_WAY_SHIFT) /* TLB way */

#endif /* _ASM_NIOS2_REGISTERS_H */