2  *      The PCI Library -- Physical memory mapping for DJGPP
16 #include <stdio.h> /* for __DJGPP__ and __DJGPP_MINOR__, available since DJGPP v2.02 and defined in…
25 #define EOVERFLOW 40 /* defined since DJGPP v2.04 */
39    * Unfortunately DJGPP prior to 2.6 has broken memalign() function,  in aligned_alloc()
40    * so for older DJGPP versions use malloc() with manual aligning.  in aligned_alloc()
56    * DJGPP malloc()'ed ptr_alloc is aligned to 8 bytes, our ptr_alloc is  in aligned_alloc()
82    * Find a DJGPP's sbrk memory handle which belongs to the ptr address pointer  in find_sbrk_memory_handle()
83    * and detects size of this memory handle. DJGPP since v2.04 has arrays  in find_sbrk_memory_handle()
85    * ranges which can be simple traversed. Older DJGPP versions have only  in find_sbrk_memory_handle()
87    * passed pointer belongs. So finding the size of the memory handle for DJGPP  in find_sbrk_memory_handle()
104            * DJGPP's __djgpp_memory_handle_list[] structure.  in find_sbrk_memory_handle()
116        * corruption in DJGPP's __djgpp_memory_handle_list[] structure.  in find_sbrk_memory_handle()
223 …pci_define_param(a, "devmem.path", "auto", "DJGPP physical memory access method: auto, devmap, phy…  in physmem_init_config()
328        * DJGPP prior to 2.6 has semi-broken __djgpp_nearptr_enable() function.  in physmem_open()
330        * older DJGPP versions call __djgpp_nearptr_disable() which fixes it.  in physmem_open()
418        * __djgpp_map_physical_memory() function is DJGPP wrapper around  in physmem_map()
421        * DJGPP sbrk() or malloc() allocator returns continuous memory range  in physmem_map()
438        * DJGPP version v2.5 this function has suboptimal implementation. Its  in physmem_map()
447        * is managed by DJGPP sbrk allocator. So allocate page-aligned range  in physmem_map()
456        * Unfortunately this is the only way because DJGPP sbrk allocator does  in physmem_map()
458        * memory which is not backed by the RAM. Even if DJGPP sbrk code is  in physmem_map()
461        * supported by DPMI hosts, even the default DJGPP's CWSDPMI does not  in physmem_map()
511                * address below 1 MB to DJGPP's accessible linear address range.  in physmem_map()
531                        * Save __dpmi_error because any DJGPP function may change  in physmem_map()
574                    * Save __dpmi_error because any DJGPP function may change  in physmem_map()
659            * value 0x0800. For example this is behavior of the default DJGPP's  in physmem_map()
719        * DJGPP CRT code on paging DPMI hosts enables NULL pointer protection by  in physmem_map()
729        * DPMI 0.9 hosts. In this case DJGPP CRT code did not enable NULL pointer  in physmem_map()
775        * There is a DJGPP function __djgpp_set_page_attributes() which sets page  in physmem_unmap()
876        * returned back to the DJGPP sbrk pool.  in physmem_unmap()
895        * DJGPP's CWSDPMI does not support it. But few alternative DPMI host like  in physmem_unmap()