/**************************************************************************** * 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_ */