ee45203646
There is no "version 2" of the "Lesser" General Public License. It is either "GPL version 2.0" or "Lesser GPL version 2.1". This patch replaces all occurrences of "Lesser GPL version 2" with "Lesser GPL version 2.1" in comment section. Signed-off-by: Chetan Pant <chetan4windows@gmail.com> Message-Id: <20201023121821.19179-1-chetan4windows@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
93 lines
3 KiB
C
93 lines
3 KiB
C
/*
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* Microblaze MMU emulation for qemu.
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*
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* Copyright (c) 2009 Edgar E. Iglesias
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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 <http://www.gnu.org/licenses/>.
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*/
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#ifndef TARGET_MICROBLAZE_MMU_H
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#define TARGET_MICROBLAZE_MMU_H
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#define MMU_R_PID 0
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#define MMU_R_ZPR 1
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#define MMU_R_TLBX 2
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#define MMU_R_TLBLO 3
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#define MMU_R_TLBHI 4
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#define MMU_R_TLBSX 5
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#define RAM_DATA 1
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#define RAM_TAG 0
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/* Tag portion */
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#define TLB_EPN_MASK MAKE_64BIT_MASK(10, 64 - 10)
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#define TLB_PAGESZ_MASK 0x00000380
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#define TLB_PAGESZ(x) (((x) & 0x7) << 7)
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#define PAGESZ_1K 0
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#define PAGESZ_4K 1
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#define PAGESZ_16K 2
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#define PAGESZ_64K 3
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#define PAGESZ_256K 4
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#define PAGESZ_1M 5
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#define PAGESZ_4M 6
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#define PAGESZ_16M 7
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#define TLB_VALID 0x00000040 /* Entry is valid */
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/* Data portion */
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#define TLB_RPN_MASK MAKE_64BIT_MASK(10, 64 - 10)
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#define TLB_PERM_MASK 0x00000300
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#define TLB_EX 0x00000200 /* Instruction execution allowed */
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#define TLB_WR 0x00000100 /* Writes permitted */
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#define TLB_ZSEL_MASK 0x000000F0
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#define TLB_ZSEL(x) (((x) & 0xF) << 4)
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#define TLB_ATTR_MASK 0x0000000F
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#define TLB_W 0x00000008 /* Caching is write-through */
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#define TLB_I 0x00000004 /* Caching is inhibited */
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#define TLB_M 0x00000002 /* Memory is coherent */
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#define TLB_G 0x00000001 /* Memory is guarded from prefetch */
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/* TLBX */
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#define R_TBLX_MISS_SHIFT 31
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#define R_TBLX_MISS_MASK (1U << R_TBLX_MISS_SHIFT)
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#define TLB_ENTRIES 64
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typedef struct {
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/* Data and tag brams. */
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uint64_t rams[2][TLB_ENTRIES];
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/* We keep a separate ram for the tids to avoid the 48 bit tag width. */
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uint8_t tids[TLB_ENTRIES];
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/* Control flops. */
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uint32_t regs[3];
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} MicroBlazeMMU;
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typedef struct {
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uint32_t paddr;
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uint32_t vaddr;
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unsigned int size;
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unsigned int idx;
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int prot;
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enum {
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ERR_PROT, ERR_MISS, ERR_HIT
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} err;
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} MicroBlazeMMULookup;
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unsigned int mmu_translate(MicroBlazeCPU *cpu, MicroBlazeMMULookup *lu,
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target_ulong vaddr, int rw, int mmu_idx);
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uint32_t mmu_read(CPUMBState *env, bool ea, uint32_t rn);
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void mmu_write(CPUMBState *env, bool ea, uint32_t rn, uint32_t v);
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void mmu_init(MicroBlazeMMU *mmu);
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#endif
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