37 lines
1.6 KiB
C
37 lines
1.6 KiB
C
/*
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Copyright (C) 2012, Aaron Lindsay <aaron@aclindsay.com>
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This file is part of Aedrix.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef PROPERTIES_H
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#define PROPERTIES_H
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extern uint32 kernel_start, kernel_end;
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extern uint32 tt_base_virtual, tt_base_physical;
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#define _kernel_virt_phys_offset ((tt_base_virtual - tt_base_physical)>>2)
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/* Note: this result is shifted left by one because 1<<31 = 2^32/2, and we want to calculate how much space we need for enough translation table entries to map the entire 32-bit range, not just half of it */
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#define _init_page_table_size (((uint32)(1<<31)/CONFIG_INIT_PAGE_SIZE)<<1)
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#define kernel_start_physical() (kernel_start_virtual() - _kernel_virt_phys_offset)
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#define kernel_end_physical() (((uint32 *)tt_base_physical) + _init_page_table_size)
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#define kernel_start_virtual() &kernel_start
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#define kernel_end_virtual() (((uint32 *)tt_base_virtual) + _init_page_table_size)
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#endif /* PROPERTIES_H */
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