qemu-e2k/include/exec/tlb-common.h

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

57 lines
1.8 KiB
C
Raw Normal View History

/*
* Common definitions for the softmmu tlb
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EXEC_TLB_COMMON_H
#define EXEC_TLB_COMMON_H 1
#define CPU_TLB_ENTRY_BITS 5
/* Minimalized TLB entry for use by TCG fast path. */
typedef union CPUTLBEntry {
struct {
uint64_t addr_read;
uint64_t addr_write;
uint64_t addr_code;
/*
* Addend to virtual address to get host address. IO accesses
* use the corresponding iotlb value.
*/
uintptr_t addend;
};
/*
* Padding to get a power of two size, as well as index
* access to addr_{read,write,code}.
*/
uint64_t addr_idx[(1 << CPU_TLB_ENTRY_BITS) / sizeof(uint64_t)];
} CPUTLBEntry;
QEMU_BUILD_BUG_ON(sizeof(CPUTLBEntry) != (1 << CPU_TLB_ENTRY_BITS));
/*
* Data elements that are per MMU mode, accessed by the fast path.
* The structure is aligned to aid loading the pair with one insn.
*/
typedef struct CPUTLBDescFast {
/* Contains (n_entries - 1) << CPU_TLB_ENTRY_BITS */
uintptr_t mask;
/* The array of tlb entries itself. */
CPUTLBEntry *table;
} CPUTLBDescFast QEMU_ALIGNED(2 * sizeof(void *));
#endif /* EXEC_TLB_COMMON_H */