Added syscalls to map to particular physical address

include/syscalls.h

@@ -32,6 +32,10 @@ size_t mmap(syscall_arg_t location, syscall_arg_t length, syscall_arg_t flags);
 
 size_t munmap(syscall_arg_t location, syscall_arg_t length);
 
+size_t map_physical(syscall_arg_t arg_addr, syscall_arg_t arg_phys_addr, syscall_arg_t arg_length);
+
+size_t unmap_physical(syscall_arg_t arg_addr, syscall_arg_t arg_length);
+
 size_t terminate_self();
 
 size_t send(syscall_arg_t recipient, syscall_arg_t message, syscall_arg_t flags);

include/types/syscallarg.h

@@ -6,6 +6,7 @@ typedef union
     long int signed_int;
     unsigned long int unsigned_int;
     void *ptr;
+    char *str;
 } syscall_arg_t;
 
 #endif

include/types/syscallid.h

@@ -6,6 +6,8 @@ typedef enum
     SYSCALL_TEST = 1,
     SYSCALL_MMAP,
     SYSCALL_MUNMAP,
+    SYSCALL_MAP_PHYS,
+    SYSCALL_UNMAP_PHYS,
     SYSCALL_YIELD,
     SYSCALL_EXIT,
     SYSCALL_SEND,

src/kernel.c

@@ -41,8 +41,6 @@ void kernel_initialize(struct boot_info_t *boot_info)
         panic("Failed to initialize page allocator.");
     }
 
-    printf("End of page map: %08x\n", page_map_end);
-
     if(kminit(page_map_end(), 0xFFC00000 - (size_t)page_map_end()))
     {
         panic("Failed to initialize heap.");
@@ -60,6 +58,8 @@ void kernel_initialize(struct boot_info_t *boot_info)
     set_syscall(SYSCALL_TEST, 1, 0, test_syscall);
     set_syscall(SYSCALL_MMAP, 3, 0, mmap);
     set_syscall(SYSCALL_MUNMAP, 2, 0, munmap);
+    set_syscall(SYSCALL_MAP_PHYS, 3, 0, map_physical);
+    set_syscall(SYSCALL_UNMAP_PHYS, 2, 0, unmap_physical);
     set_syscall(SYSCALL_SEND, 3, 0, send);
     set_syscall(SYSCALL_RECEIVE, 2, 0, receive);
     set_syscall(SYSCALL_OPEN_PORT, 1, 0, open_port);

src/syscalls.c

@@ -88,6 +88,39 @@ size_t munmap(syscall_arg_t arg_location, syscall_arg_t arg_length)
     return status;
 }
 
+size_t map_physical(syscall_arg_t arg_addr, syscall_arg_t arg_phys_addr, syscall_arg_t arg_length)
+{
+    void *addr = arg_addr.ptr;
+    physaddr_t frame = arg_phys_addr.unsigned_int;
+    unsigned long length = arg_length.unsigned_int;
+    int status = ENONE;
+    for(unsigned long offset = 0; offset < length; offset += page_size)
+    {
+        status = map_page(addr + offset, frame + offset, PAGE_USERMODE | PAGE_RW);
+        if(status)
+        {
+            break;
+        }
+    }
+    return status;
+}
+
+size_t unmap_physical(syscall_arg_t arg_addr, syscall_arg_t arg_length)
+{
+    void *addr = arg_addr.ptr;
+    unsigned long length = arg_length.unsigned_int;
+    int status = ENONE;
+    for(unsigned long offset = 0; offset < length; offset += page_size)
+    {
+        status = unmap_page(addr + offset);
+        if(status != ENONE)
+        {
+            break;
+        }
+    }
+    return status;
+}
+
 size_t terminate_self()
 {
     return kernel_terminate_process(kernel_current_pid());