diff options
Diffstat (limited to 'newlib/libc/sys/go32/dpmi.h')
| -rw-r--r-- | newlib/libc/sys/go32/dpmi.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/newlib/libc/sys/go32/dpmi.h b/newlib/libc/sys/go32/dpmi.h new file mode 100644 index 00000000000..7a2cb13afec --- /dev/null +++ b/newlib/libc/sys/go32/dpmi.h @@ -0,0 +1,151 @@ +/* This is file dpmi.h */
+/*
+** Copyright (C) 1993 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
+**
+** This file is distributed under the terms listed in the document
+** "copying.dj", available from DJ Delorie at the address above.
+** 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
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