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 /* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44. */ 12 #define TARGET_PHYS_ADDR_SPACE_BITS 44 13 14 #ifdef CONFIG_USER_ONLY 15 /* 16 * Allow user-only to vary page size. Real hardware allows only 8k and 64k, 17 * but since any variance means guests cannot assume a fixed value, allow 18 * a 4k minimum to match x86 host, which can minimize emulation issues. 19 */ 20 # define TARGET_PAGE_BITS_VARY 21 # define TARGET_PAGE_BITS_MIN 12 22 # define TARGET_VIRT_ADDR_SPACE_BITS 63 23 #else 24 # define TARGET_PAGE_BITS 13 25 # define TARGET_VIRT_ADDR_SPACE_BITS (30 + TARGET_PAGE_BITS) 26 #endif 27 28 /* Alpha processors have a weak memory model */ 29 #define TCG_GUEST_DEFAULT_MO (0) 30 31 #endif 32