| /**************************************************************************** |
| * YABEL BIOS Emulator |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the BSD License |
| * which accompanies this distribution, and is available at |
| * http://www.opensource.org/licenses/bsd-license.php |
| * |
| * Copyright (c) 2008 Pattrick Hueper <phueper@hueper.net> |
| ****************************************************************************/ |
| |
| #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 speced PMM struct, however, since I cannot |
| * put the handling of PMM in the virtual memory (I dont 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]; |
| } __attribute__ ((__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 |
