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Diffstat (limited to 'target/alpha/cpu-param.h')
| -rw-r--r-- | target/alpha/cpu-param.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target/alpha/cpu-param.h b/target/alpha/cpu-param.h new file mode 100644 index 0000000000..692aee27ca --- /dev/null +++ b/target/alpha/cpu-param.h @@ -0,0 +1,31 @@ +/* + * Alpha cpu parameters for qemu. + * + * Copyright (c) 2007 Jocelyn Mayer + * SPDX-License-Identifier: LGPL-2.0+ + */ + +#ifndef ALPHA_CPU_PARAM_H +#define ALPHA_CPU_PARAM_H 1 + +#define TARGET_LONG_BITS 64 +#define TARGET_PAGE_BITS 13 +#ifdef CONFIG_USER_ONLY +/* + * ??? The kernel likes to give addresses in high memory. If the host has + * more virtual address space than the guest, this can lead to impossible + * allocations. Honor the long-standing assumption that only kernel addrs + * are negative, but otherwise allow allocations anywhere. This could lead + * to tricky emulation problems for programs doing tagged addressing, but + * that's far fewer than encounter the impossible allocation problem. + */ +#define TARGET_PHYS_ADDR_SPACE_BITS 63 +#define TARGET_VIRT_ADDR_SPACE_BITS 63 +#else +/* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44. */ +#define TARGET_PHYS_ADDR_SPACE_BITS 44 +#define TARGET_VIRT_ADDR_SPACE_BITS (30 + TARGET_PAGE_BITS) +#endif +#define NB_MMU_MODES 3 + +#endif |