1 /* 2 * Alpha cpu parameters for qemu. 3 * 4 * Copyright (c) 2007 Jocelyn Mayer 5 * SPDX-License-Identifier: LGPL-2.0-or-later 6 */ 7 8 #ifndef ALPHA_CPU_PARAM_H 9 #define ALPHA_CPU_PARAM_H 10 11 #define TARGET_LONG_BITS 64 12 13 /* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44. */ 14 #define TARGET_PHYS_ADDR_SPACE_BITS 44 15 16 #ifdef CONFIG_USER_ONLY 17 /* 18 * Allow user-only to vary page size. Real hardware allows only 8k and 64k, 19 * but since any variance means guests cannot assume a fixed value, allow 20 * a 4k minimum to match x86 host, which can minimize emulation issues. 21 */ 22 # define TARGET_PAGE_BITS_VARY 23 # define TARGET_PAGE_BITS_MIN 12 24 # define TARGET_VIRT_ADDR_SPACE_BITS 63 25 #else 26 # define TARGET_PAGE_BITS 13 27 # define TARGET_VIRT_ADDR_SPACE_BITS (30 + TARGET_PAGE_BITS) 28 #endif 29 30 /* Alpha processors have a weak memory model */ 31 #define TCG_GUEST_DEFAULT_MO (0) 32 33 #endif 34