qemu

FORK: QEMU emulator
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cpu-param.h (838B)

      1 /*
      2  * MicroBlaze cpu parameters for qemu.
      3  *
      4  * Copyright (c) 2009 Edgar E. Iglesias
      5  * SPDX-License-Identifier: LGPL-2.0+
      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_LONG_BITS 32
     21 #define TARGET_PHYS_ADDR_SPACE_BITS 32
     22 #define TARGET_VIRT_ADDR_SPACE_BITS 32
     23 #else
     24 #define TARGET_LONG_BITS 64
     25 #define TARGET_PHYS_ADDR_SPACE_BITS 64
     26 #define TARGET_VIRT_ADDR_SPACE_BITS 64
     27 #endif
     28 
     29 /* FIXME: MB uses variable pages down to 1K but linux only uses 4k.  */
     30 #define TARGET_PAGE_BITS 12
     31 #define NB_MMU_MODES 3
     32 
     33 #endif