| 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_VIRT_ADDR_SPACE_BITS 32 |
| 21 | #else |
| 22 | #define TARGET_VIRT_ADDR_SPACE_BITS 64 |
| 23 | #endif |
| 24 | |
| 25 | /* FIXME: MB uses variable pages down to 1K but linux only uses 4k. */ |
| 26 | #define TARGET_PAGE_BITS 12 |
| 27 | |
| 28 | #endif |