nios2: Nios2 registers

/*

 * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 */

#ifndef _ASM_NIOS2_REGISTERS_H

#define _ASM_NIOS2_REGISTERS_H

#ifndef __ASSEMBLY__

#include <asm/cpuinfo.h>

#endif

/* control register numbers */

#define CTL_STATUS	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 __ASSEMBLY__

#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 */