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[/] [or1k/] [trunk/] [newlib-1.10.0/] [newlib/] [libc/] [sys/] [go32/] [sys/] [dpmi.h] - Rev 1765
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/* This is file dpmi.h */ /* ** Copyright (C) 1993 DJ Delorie ** ** This file is distributed under the terms listed in the document ** "copying.dj". ** A copy of "copying.dj" should accompany this file; if not, a copy ** should be available from where this file was obtained. This file ** may not be distributed without a verbatim copy of "copying.dj". ** ** This file is distributed WITHOUT ANY WARRANTY; without even the implied ** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef _DPMI_H_ #define _DPMI_H_ #include <sys/types.h> #ifdef __cplusplus extern "C" { #endif typedef union { struct { u_long edi; u_long esi; u_long ebp; u_long res; u_long ebx; u_long edx; u_long ecx; u_long eax; } d; struct { u_short di, di_hi; u_short si, si_hi; u_short bp, bp_hi; u_short res, res_hi; u_short bx, bx_hi; u_short dx, dx_hi; u_short cx, cx_hi; u_short ax, ax_hi; u_short flags; u_short es; u_short ds; u_short fs; u_short gs; u_short ip; u_short cs; u_short sp; u_short ss; } x; struct { u_char edi[4]; u_char esi[4]; u_char ebp[4]; u_char res[4]; u_char bl, bh, ebx_b2, ebx_b3; u_char dl, dh, edx_b2, edx_b3; u_char cl, ch, ecx_b2, ecx_b3; u_char al, ah, eax_b2, eax_b3; } h; } _go32_dpmi_registers; typedef struct { u_long size; u_long pm_offset; u_short pm_selector; u_short rm_offset; u_short rm_segment; } _go32_dpmi_seginfo; typedef struct { u_long available_memory; u_long available_pages; u_long available_lockable_pages; u_long linear_space; u_long unlocked_pages; u_long available_physical_pages; u_long total_physical_pages; u_long free_linear_space; u_long max_pages_in_paging_file; u_long reserved[3]; } _go32_dpmi_meminfo; /* returns zero if success, else dpmi error and info->size is max size */ int _go32_dpmi_allocate_dos_memory(_go32_dpmi_seginfo *info); /* set size to bytes/16, call, use rm_segment. Do not change anthing but size until the memory is freed. If error, max size is returned in size as bytes/16. */ int _go32_dpmi_free_dos_memory(_go32_dpmi_seginfo *info); /* set new size to bytes/16, call. If error, max size is returned in size as bytes/16 */ int _go32_dpmi_resize_dos_memory(_go32_dpmi_seginfo *info); /* uses pm_selector to free memory */ /* These both use the rm_segment:rm_offset fields only */ int _go32_dpmi_get_real_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info); int _go32_dpmi_set_real_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info); /* These do NOT wrap the function in pm_offset in an iret handler. You must provide an assembler interface yourself, or alloc one below. You may NOT longjmp out of an interrupt handler. */ int _go32_dpmi_get_protected_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info); /* puts vector in pm_selector:pm_offset. */ int _go32_dpmi_set_protected_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info); /* sets vector from pm_offset and pm_selector */ int _go32_dpmi_chain_protected_mode_interrupt_vector(int vector, _go32_dpmi_seginfo *info); /* sets up wrapper that calls function in pm_offset, chaining to old handler when it returns */ /* These can be used to generate assember IRET-style wrappers for functions */ int _go32_dpmi_allocate_iret_wrapper(_go32_dpmi_seginfo *info); /* Put function ptr in pm_offset, call, returns wrapper entry in pm_offset. */ int _go32_dpmi_free_iret_wrapper(_go32_dpmi_seginfo *info); /* assumes pm_offset points to wrapper, frees it */ /* simulate real mode calls. CS:IP from regs for non-interrupt */ int _go32_dpmi_simulate_int(int vector, _go32_dpmi_registers *regs); int _go32_dpmi_simulate_fcall(_go32_dpmi_registers *regs); int _go32_dpmi_simulate_fcall_iret(_go32_dpmi_registers *regs); /* These automatically handle the tasks of restructuring the real-mode stack for the proper return type. The callback (info->pm_offset) is called as (*pmcb)(_go32_dpmi_registers *regs); */ int _go32_dpmi_allocate_real_mode_callback_retf(_go32_dpmi_seginfo *info, _go32_dpmi_registers *regs); /* points callback at pm_offset, returns seg:ofs of callback addr in rm_segment:rm_offset. Do not change any fields until freed. Interface is added to simulate far return */ int _go32_dpmi_allocate_real_mode_callback_iret(_go32_dpmi_seginfo *info, _go32_dpmi_registers *regs); /* same, but simulates iret */ int _go32_dpmi_free_real_mode_callback(_go32_dpmi_seginfo *info); /* frees callback */ /* Only available_memory is guaranteed to be valid. Try available_physical_pages for phys mem left */ int _go32_dpmi_get_free_memory_information(_go32_dpmi_meminfo *info); /* Convenience functions. These use the above memory info call. The return value is *bytes* */ u_long _go32_dpmi_remaining_physical_memory(void); u_long _go32_dpmi_remaining_virtual_memory(void); #ifdef __cplusplus } #endif #endif