032c76bc6f
Add support for emulating Altera NiosII R1 architecture into qemu. This patch is based on previous work by Chris Wulff from 2012 and updated to latest mainline QEMU. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Chris Wulff <crwulff@gmail.com> Cc: Jeff Da Silva <jdasilva@altera.com> Cc: Ley Foon Tan <lftan@altera.com> Cc: Sandra Loosemore <sandra@codesourcery.com> Cc: Yves Vandervennet <yvanderv@altera.com> Cc: Alexander Graf <agraf@suse.de> Message-Id: <20170118220146.489-3-marex@denx.de> [rth: Remove tlb_flush from nios2_cpu_reset.] Signed-off-by: Richard Henderson <rth@twiddle.net>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*
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* Altera Nios II MMU emulation for qemu.
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*
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* Copyright (C) 2012 Chris Wulff <crwulff@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see
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* <http://www.gnu.org/licenses/lgpl-2.1.html>
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*/
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#ifndef MMU_NIOS2_H
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#define MMU_NIOS2_H
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typedef struct Nios2TLBEntry {
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target_ulong tag;
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target_ulong data;
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} Nios2TLBEntry;
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typedef struct Nios2MMU {
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int tlb_entry_mask;
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uint32_t pteaddr_wr;
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uint32_t tlbacc_wr;
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uint32_t tlbmisc_wr;
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Nios2TLBEntry *tlb;
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} Nios2MMU;
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typedef struct Nios2MMULookup {
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target_ulong vaddr;
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target_ulong paddr;
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int prot;
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} Nios2MMULookup;
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void mmu_flip_um(CPUNios2State *env, unsigned int um);
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unsigned int mmu_translate(CPUNios2State *env,
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Nios2MMULookup *lu,
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target_ulong vaddr, int rw, int mmu_idx);
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void mmu_read_debug(CPUNios2State *env, uint32_t rn);
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void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v);
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void mmu_init(CPUNios2State *env);
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#endif /* MMU_NIOS2_H */
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