pulled in and adapted the dos code from eradicate

[retrobench] / src / dos / djdpmi.c

diff --git a/src/dos/djdpmi.c b/src/dos/djdpmi.c
new file mode 100644 (file)
index 0000000..ef77a32
--- /dev/null
+++ b/src/dos/djdpmi.c
@@ -0,0 +1,35 @@
+#ifdef __DJGPP__
+#include <dpmi.h>
+#include <sys/nearptr.h>
+#include "cdpmi.h"
+#include "util.h"
+
+uint16_t dpmi_alloc(unsigned int par, uint16_t *sel)
+{
+       int tmp;
+       uint16_t seg = __dpmi_allocate_dos_memory(par, &tmp);
+       *sel = tmp;
+       return seg;
+}
+
+void dpmi_free(uint16_t sel)
+{
+       __dpmi_free_dos_memory(sel);
+}
+
+void *dpmi_mmap(uint32_t phys_addr, unsigned int size)
+{
+       __dpmi_meminfo mem;
+       mem.address = phys_addr;
+       mem.size = size;
+       __dpmi_physical_address_mapping(&mem);
+       return (void*)(mem.address - __djgpp_base_address);
+}
+
+void dpmi_munmap(void *addr)
+{
+       __dpmi_meminfo mem;
+       mem.address = (uint32_t)addr + __djgpp_base_address;
+       __dpmi_free_physical_address_mapping(&mem);
+}
+#endif /* __DJGPP__ */