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/****************************************************************************
* YABEL BIOS Emulator
*
* Copyright (c) 2008 Pattrick Hueper <phueper@hueper.net>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef _YABEL_PMM_H_
#define _YABEL_PMM_H_
#include <types.h>
/* PMM Structure see PMM Spec Version 1.01 Chapter 3.1.1
* (search web for specspmm101.pdf)
*/
typedef struct {
u8 signature[4];
u8 struct_rev;
u8 length;
u8 checksum;
u32 entry_point_offset;
u8 reserved[5];
/* Code is not part of the specced PMM struct, however, since I cannot
* put the handling of PMM in the virtual memory (I don't want to hack
* it together in x86 assembly ;-)) this code array is pointed to by
* entry_point_offset, in code there is only a INT call and a RETF,
* thus every PMM call will issue a PMM INT (only defined in YABEL,
* see interrupt.c) and the INT Handler will do the actual PMM work.
*/
u8 code[3];
} __packed pmm_information_t;
/* This function is used to setup the PMM struct in virtual memory
* at a certain offset */
u8 pmm_setup(u16 segment, u16 offset);
/* This is the INT Handler mentioned above, called by my special PMM INT. */
void pmm_handleInt(void);
void pmm_test(void);
#endif /* _YABEL_PMM_H_ */
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