dos backend partial rewrite starting with DPMI

[dosdemo] / src / dos / cdpmi.h

diff --git a/src/dos/cdpmi.h b/src/dos/cdpmi.h
index 9ce64e1..cdfd2f7 100644 (file)
--- a/src/dos/cdpmi.h
+++ b/src/dos/cdpmi.h
@@ -7,7 +7,7 @@
 
 #include "inttypes.h"
 
 
 #include "inttypes.h"
 

-struct dpmi_real_regs {
+struct dpmi_regs {

        uint32_t edi, esi, ebp;
        uint32_t reserved;
        uint32_t ebx, edx, ecx, eax;
        uint32_t edi, esi, ebp;
        uint32_t reserved;
        uint32_t ebx, edx, ecx, eax;

@@ -18,27 +18,60 @@ struct dpmi_real_regs {
 
 uint16_t dpmi_alloc(unsigned int par, uint16_t *sel);
 void dpmi_free(uint16_t sel);
 
 uint16_t dpmi_alloc(unsigned int par, uint16_t *sel);
 void dpmi_free(uint16_t sel);

+void dpmi_int(int inum, struct dpmi_regs *regs);
+void *dpmi_mmap(uint32_t phys_addr, unsigned int size);
+void dpmi_munmap(void *addr);

 
 #ifdef __WATCOMC__
 #pragma aux dpmi_alloc = \
 
 #ifdef __WATCOMC__
 #pragma aux dpmi_alloc = \

-               "mov eax, 0x100" \
+               "mov ax, 0x100" \

                "int 0x31" \
                "mov [edi], dx" \
                "int 0x31" \
                "mov [edi], dx" \

-               value[ax] parm[ebx][edi];
+               value[ax] \
+               parm[ebx][edi];

 
 #pragma aux dpmi_free = \
 
 #pragma aux dpmi_free = \

-               "mov eax, 0x101" \
+               "mov ax, 0x101" \
+               "int 0x31" \
+               parm[dx] \
+               modify[ax];
+
+#pragma aux dpmi_int = \
+               "mov ax, 0x300" \
+               "xor ecx, ecx" \
+               "int 0x31" \
+               parm[ebx][edi] \
+               modify[ax ecx];
+
+#pragma aux dpmi_mmap = \
+               "mov ax, 0x800" \
+               "mov cx, bx" \
+               "shr ebx, 16" \
+               "mov di, si" \
+               "shr esi, 16" \

                "int 0x31" \
                "int 0x31" \

-               parm[dx];
+               "jnc mmap_skip_err" \
+               "xor bx, bx" \
+               "xor cx, cx" \
+       "mmap_skip_err:" \
+               "mov ax, bx" \
+               "shl eax, 16" \
+               "mov ax, cx" \
+               value[eax] \
+               parm[ebx][esi] \
+               modify[cx di];

 
 

-void dpmi_real_int(int inum, struct dpmi_real_regs *regs);
+#pragma aux dpmi_munmap = \
+               "mov ax, 0x801" \
+               "mov cx, bx" \
+               "shr ebx, 16" \
+               "int 0x31" \
+               parm[ebx] \
+               modify[ax];

 #endif /* __WATCOMC__ */
 
 #ifdef __DJGPP__
 #endif /* __WATCOMC__ */
 
 #ifdef __DJGPP__

-#define dpmi_real_int(inum, regs) __dpmi_int((inum), (__dpmi_regs*)(regs))
+#define dpmi_int(inum, regs) __dpmi_int((inum), (__dpmi_regs*)(regs))

 #endif
 
 #endif
 

-void *dpmi_mmap(uint32_t phys_addr, unsigned int size);
-void dpmi_munmap(void *addr);
-

 #endif /* DPMI_H_ */
 #endif /* DPMI_H_ */