block: Move send_disk_op() from block.c to disk.c

The send_disk_op() function is only called from the 16bit handlers
found in disk.c.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/src/block.c b/src/block.c
index d9de29f..a383574 100644
--- a/src/block.c
+++ b/src/block.c
@@ -22,7 +22,7 @@
 #include "hw/virtio-scsi.h" // virtio_scsi_process_op
 #include "malloc.h" // malloc_low
 #include "output.h" // dprintf
-#include "stacks.h" // stack_hop
+#include "stacks.h" // call32
 #include "std/disk.h" // struct dpte_s
 #include "string.h" // checksum
 #include "util.h" // process_floppy_op
@@ -613,35 +613,3 @@
         op->count = 0;
     return ret;
 }
-
-// Execute a "disk_op_s" request - this runs on the extra stack.
-static int
-__send_disk_op(struct disk_op_s *op_far, u16 op_seg)
-{
-    struct disk_op_s dop;
-    memcpy_far(GET_SEG(SS), &dop
-               , op_seg, op_far
-               , sizeof(dop));
-
-    dprintf(DEBUG_HDL_13, "disk_op d=%p lba=%d buf=%p count=%d cmd=%d\n"
-            , dop.drive_gf, (u32)dop.lba, dop.buf_fl
-            , dop.count, dop.command);
-
-    int status = process_op(&dop);
-
-    // Update count with total sectors transferred.
-    SET_FARVAR(op_seg, op_far->count, dop.count);
-
-    return status;
-}
-
-// Execute a "disk_op_s" request by jumping to the extra 16bit stack.
-int
-send_disk_op(struct disk_op_s *op)
-{
-    ASSERT16();
-    if (! CONFIG_DRIVES)
-        return -1;
-
-    return stack_hop(__send_disk_op, op, GET_SEG(SS));
-}
diff --git a/src/block.h b/src/block.h
index a5f38c4..0f15ff9 100644
--- a/src/block.h
+++ b/src/block.h
@@ -115,7 +115,6 @@
 void block_setup(void);
 int default_process_op(struct disk_op_s *op);
 int process_op(struct disk_op_s *op);
-int send_disk_op(struct disk_op_s *op);
 int create_bounce_buf(void);
 
 #endif // block.h
diff --git a/src/disk.c b/src/disk.c
index 3854d00..bcd6a09 100644
--- a/src/disk.c
+++ b/src/disk.c
@@ -87,6 +87,38 @@
     return res;
 }
 
+// Execute a "disk_op_s" request - this runs on the extra stack.
+static int
+__send_disk_op(struct disk_op_s *op_far, u16 op_seg)
+{
+    struct disk_op_s dop;
+    memcpy_far(GET_SEG(SS), &dop
+               , op_seg, op_far
+               , sizeof(dop));
+
+    dprintf(DEBUG_HDL_13, "disk_op d=%p lba=%d buf=%p count=%d cmd=%d\n"
+            , dop.drive_gf, (u32)dop.lba, dop.buf_fl
+            , dop.count, dop.command);
+
+    int status = process_op(&dop);
+
+    // Update count with total sectors transferred.
+    SET_FARVAR(op_seg, op_far->count, dop.count);
+
+    return status;
+}
+
+// Execute a "disk_op_s" request by jumping to the extra 16bit stack.
+static int
+send_disk_op(struct disk_op_s *op)
+{
+    ASSERT16();
+    if (! CONFIG_DRIVES)
+        return -1;
+
+    return stack_hop(__send_disk_op, op, GET_SEG(SS));
+}
+
 // Perform read/write/verify using old-style chs accesses
 static void noinline
 basic_access(struct bregs *regs, struct drive_s *drive_gf, u16 command)