Changeset dabe6333 in mainline for generic

Timestamp:

2006-03-16T15:56:40Z (19 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

1ee9ced

Parents:

37e7d2b9

Message:

Added null console for buffering output when no real output available.
Added identity mapper for AMD64 that allows whole physical memory to be
accessed before paging is initialized.

Location:

generic

Files:

• include/ipc/ipc.h (modified) (1 diff)
• src/console/console.c (modified) (1 diff)
• src/ipc/ipc.c (modified) (2 diffs)

generic/include/ipc/ipc.h

@@ -38 +38 @@
 
 /* Flags for calls */
-#define IPC_CALL_ANSWERED      1 /**< This is answer to a call */
-#define IPC_CALL_STATIC_ALLOC  2 /**< This call will not be freed on error */
+#define IPC_CALL_ANSWERED      0x1 /**< This is answer to a call */
+#define IPC_CALL_STATIC_ALLOC  0x2 /**< This call will not be freed on error */
+#define IPC_CALL_DISPATCHED    0x4 /**< Call is in dispatch queue */
 
 /* Flags for ipc_wait_for_call */

generic/src/console/console.c

@@ -39 +39 @@
 #include <arch/atomic.h>
 
+#define BUFLEN 2048
+static char debug_buffer[BUFLEN];
+static size_t offset = 0;
+/** Initialize stdout to something that does not print, but does not fail
+ *
+ * Save data in some buffer so that it could be retrieved in the debugger
+ */
+static void null_putchar(chardev_t *d, const char ch)
+{
+        if (offset >= BUFLEN)
+                offset = 0;
+        debug_buffer[offset++] = ch;
+}
+
+static chardev_operations_t null_stdout_ops = {
+        .write = null_putchar
+};
+chardev_t null_stdout = {
+        .name = "null",
+        .op = &null_stdout_ops
+};
+
 /** Standard input character device. */
 chardev_t *stdin = NULL;
-chardev_t *stdout = NULL;
+chardev_t *stdout = &null_stdout;
 
 /** Get character from character device. Do not echo character.

generic/src/ipc/ipc.c

@@ -185 +185 @@
         answerbox_t *callerbox = request->callerbox;
 
+        request->flags &= ~IPC_CALL_DISPATCHED;
         request->flags |= IPC_CALL_ANSWERED;
 
@@ -218 +219 @@
                         /* Append request to dispatch queue */
                         list_append(&request->list, &box->dispatched_calls);
+                        request->flags |= IPC_CALL_DISPATCHED;
                 } else {
                         if (!(flags & IPC_WAIT_NONBLOCKING)) {