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108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/*
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* Mock-up memory layout definitions for test purposes.
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*
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* Copyright (C) 2007 Bahadir Balban
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*
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*/
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#ifndef __BASICLAYOUT_H__
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#define __BASICLAYOUT_H__
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#ifndef __ASSEMBLY__
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#include INC_GLUE(memory.h)
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#endif
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#include INC_PLAT(offsets.h)
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#define RESERVED_AREA_START 0x0
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#define RESERVED_AREA_END 0x00400000
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#define RESERVED_AREA_SIZE (RESERVED_AREA_END - RESERVED_AREA_START)
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#define RESERVED_AREA_SECTIONS (RESERVED_AREA_SIZE / ARM_SECTION_SIZE)
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/* 0x00400000 */
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#define USER_AREA_START 0x00400000
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#define USER_AREA_END 0xF0000000
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#define USER_AREA_SIZE (USER_AREA_END - USER_AREA_START)
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#define USER_AREA_SECTIONS (USER_AREA_SIZE / ARM_SECTION_SIZE)
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/* 0xf0000000 */
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#define KERNEL_AREA_START 0xF0000000
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#define KERNEL_AREA_END 0xF4000000
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#define KERNEL_AREA_SIZE (KERNEL_AREA_END - KERNEL_AREA_START)
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#define KERNEL_AREA_SECTIONS (KERNEL_AREA_SIZE / ARM_SECTION_SIZE)
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/* Kernel offset is taken as virtual memory base */
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#define VIRT_ADDR_BASE KERNEL_AREA_START
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/* 0xf4000000 */
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#define UNCACHE_AREA_START 0xF4000000
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#define UNCACHE_AREA_END 0xF8000000
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#define UNCACHE_AREA_SIZE (UNCACHE_AREA_END - UNCACHE_AREA_START)
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#define UNCACHE_AREA_SECTIONS (UNCACHE_AREA_SIZE / ARM_SECTION_SIZE)
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/* The page tables are the main clients of uncached virtual memory */
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#define PGTABLE_ADDR_BASE UNCACHE_AREA_START
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/* 0xf8000000 */
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#define VAR_AREA_START 0xF8000000
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#define VAR_AREA_END 0xF9000000
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#define VAR_AREA_SIZE (VAR_AREA_END - VAR_AREA_START)
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#define VAR_AREA_SECTIONS (VAR_AREA_SIZE / ARM_SECTION_SIZE)
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/* 0xf9000000 */
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#define IO_AREA_START 0xF9000000
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#define IO_AREA_END 0xFF000000
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#define IO_AREA_SIZE (IO_AREA_END - IO_AREA_START)
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#define IO_AREA_SECTIONS (IO_AREA_SIZE / ARM_SECTION_SIZE)
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/* 0xff000000 */
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#define MISC_AREA_START 0xFF000000
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#define MISC_AREA_END 0xFFF00000
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#define MISC_AREA_SIZE (MISC_AREA_END - MISC_AREA_START)
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#define MISC_AREA_SECTIONS (MISC_AREA_SIZE / ARM_SECTION_SIZE)
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/* First page in MISC area is used for KIP/UTCB reference page */
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#define USER_KIP_PAGE MISC_AREA_START
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/* 0xfff00000 */
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#define EXCPT_AREA_START 0xFFF00000
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#define EXCPT_AREA_END (EXCPT_AREA_START + ARM_SECTION_SIZE)
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#define EXCPT_AREA_SIZE (EXCPT_AREA_END - EXCPT_AREA_START)
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/* 1MB IO Areas in the Virtual Address space. Define more if needed */
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#define IO_AREA0_VADDR (IO_AREA_START + (ARM_SECTION_SIZE*0))
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#define IO_AREA1_VADDR (IO_AREA_START + (ARM_SECTION_SIZE*1))
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#define IO_AREA2_VADDR (IO_AREA_START + (ARM_SECTION_SIZE*2))
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#define IO_AREA3_VADDR (IO_AREA_START + (ARM_SECTION_SIZE*3))
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#define IO_AREA4_VADDR (IO_AREA_START + (ARM_SECTION_SIZE*4))
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#define IO_AREA5_VADDR (IO_AREA_START + (ARM_SECTION_SIZE*5))
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#define IO_AREA6_VADDR (IO_AREA_START + (ARM_SECTION_SIZE*6))
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#define IO_AREA7_VADDR (IO_AREA_START + (ARM_SECTION_SIZE*7))
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/*
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* Address of start of arm_high_vector - exception handling code
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*/
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#define ARM_HIGH_VECTOR_VADDR (EXCPT_AREA_START | 0x000f0000 )
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#define ARM_SYSCALL_VECTOR (0xffffff00)
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/*
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* These offsets depend on where the platform defines its physical memory
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* and how the system defines the virtual memory regions in arm/basiclayout.h
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*/
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//#define KERNEL_OFFSET (VIRT_ADDR_BASE - PHYS_ADDR_BASE)
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//#define PGTABLE_OFFSET (PGTABLE_ADDR_BASE - PGTABLE_PHYS_ADDR_BASE)
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/* Use a more predictible offset by just changing the top nibble */
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#define KERNEL_OFFSET VIRT_ADDR_BASE
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#define PGTABLE_OFFSET PGTABLE_ADDR_BASE
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/*
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* Convenience macros for converting between address types.
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*/
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#if defined(__KERNEL__)
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#define phys_to_virt(addr) ((unsigned int)addr)
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#define phys_to_ptab(addr) ((unsigned int)addr)
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#define virt_to_phys(addr) ((unsigned int)addr)
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#define virt_to_ptab(addr) (phys_to_ptab(virt_to_phys(addr)))
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#endif
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#endif /* __BASICLAYOUT_H__ */
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