1 /* 2 * MicroBlaze cpu parameters for qemu. 3 * 4 * Copyright (c) 2009 Edgar E. Iglesias 5 * SPDX-License-Identifier: LGPL-2.0-or-later 6 */ 7 8 #ifndef MICROBLAZE_CPU_PARAM_H 9 #define MICROBLAZE_CPU_PARAM_H 10 11 /* 12 * While system mode can address up to 64 bits of address space, 13 * this is done via the lea/sea instructions, which are system-only 14 * (as they also bypass the mmu). 15 * 16 * We can improve the user-only experience by only exposing 32 bits 17 * of address space. 18 */ 19 #ifdef CONFIG_USER_ONLY 20 #define TARGET_PHYS_ADDR_SPACE_BITS 32 21 #define TARGET_VIRT_ADDR_SPACE_BITS 32 22 #else 23 #define TARGET_PHYS_ADDR_SPACE_BITS 64 24 #define TARGET_VIRT_ADDR_SPACE_BITS 64 25 #endif 26 27 /* FIXME: MB uses variable pages down to 1K but linux only uses 4k. */ 28 #define TARGET_PAGE_BITS 12 29 30 #define TARGET_INSN_START_EXTRA_WORDS 1 31 32 #endif 33