3bfbec8336
* Kernel is 64 bit, and we won't need a 32bit load base. Change-Id: I729bab01c8f71083002db061e153b0e5052b9a1c Reviewed-on: https://review.haiku-os.org/c/1326 Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/*
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** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
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** Copyright 2019, Adrien Destugues, pulkomandy@pulkomandy.tk
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** Distributed under the terms of the MIT License.
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*/
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#ifndef _KERNEL_ARCH_SPARC_KERNEL_H
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#define _KERNEL_ARCH_SPARC_KERNEL_H
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#include <arch/cpu.h>
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// memory layout
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#define KERNEL_LOAD_BASE_64_BIT 0xffffffff80000000ll
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// Base of the kernel address space.
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// KERNEL_BASE is the base of the kernel address space. This differs from the
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// address where the kernel is loaded to: the kernel is loaded in the top 2GB
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// of the virtual address space as required by GCC's kernel code model. The
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// whole kernel address space is the top 512GB of the address space.
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#define KERNEL_BASE 0xffffff0000000000
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#define KERNEL_SIZE 0x10000000000
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#define KERNEL_TOP (KERNEL_BASE + (KERNEL_SIZE - 1))
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// Userspace address space layout.
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// There is a 2MB hole just before the end of the bottom half of the address
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// space. This means that if userland passes in a buffer that crosses into the
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// uncanonical address region, it will be caught through a page fault.
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#define USER_BASE 0x100000
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#define USER_BASE_ANY USER_BASE
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#define USER_SIZE (0x800000000000 - (0x200000 + USER_BASE))
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#define USER_TOP (USER_BASE + (USER_SIZE - 1))
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#define KERNEL_USER_DATA_BASE 0x7f0000000000
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#define USER_STACK_REGION 0x7f0000000000
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#define USER_STACK_REGION_SIZE ((USER_TOP - USER_STACK_REGION) + 1)
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#endif /* _KERNEL_ARCH_SPARC_KERNEL_H */
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