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2bd3266498
Pagers now set their own utcb explicitly via exchange_registers. exregs accepts calls from active pagers for this purpose only.
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/*
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* Virtual memory layout of ARM systems.
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*/
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#ifndef __MEMLAYOUT_H__
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#define __MEMLAYOUT_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 KERNEL_AREA_START 0xF0000000
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#define KERNEL_AREA_END 0xF8000000 /* 128 MB */
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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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#define UTCB_SIZE (sizeof(int) * 64)
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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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#define USER_KIP_PAGE 0xFF000000
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/* ARM-specific offset in KIP that tells the address of UTCB page */
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#define UTCB_KIP_OFFSET 0x50
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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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#define ARM_HIGH_VECTOR 0xFFFF0000
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#define ARM_SYSCALL_VECTOR 0xFFFFFF00
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#define KERNEL_OFFSET (KERNEL_AREA_START - PHYS_MEM_START)
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/* User tasks define them differently */
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#if defined (__KERNEL__)
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#define phys_to_virt(addr) ((unsigned int)(addr) + KERNEL_OFFSET)
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#define virt_to_phys(addr) ((unsigned int)(addr) - KERNEL_OFFSET)
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#endif
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#define KERN_ADDR(x) ((x >= KERNEL_AREA_START) && (x < KERNEL_AREA_END))
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#define UTCB_ADDR(x) ((x >= UTCB_AREA_START) && (x < UTCB_AREA_END))
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#define PRIVILEGED_ADDR(x) (KERN_ADDR(x) || (x >= ARM_HIGH_VECTOR) || \
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(x >= IO_AREA_START && x < IO_AREA_END))
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#endif /* __MEMLAYOUT_H__ */
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