# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Date 1193024674 -32400
# Node ID ceee54c9f9f0a43b3b13b972c49a15ef32f7fc73
# Parent  208908de6975954de268fdbc42db8067f5b64eeb
make buffered pio aware of save/load.
PATCHNAME: save_load_for_buffered_pio

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r 208908de6975 -r ceee54c9f9f0 tools/ioemu/hw/ide.c
--- a/tools/ioemu/hw/ide.c	Wed Oct 17 15:29:44 2007 +0900
+++ b/tools/ioemu/hw/ide.c	Mon Oct 22 12:44:34 2007 +0900
@@ -431,16 +431,21 @@ buffered_pio_init(void)
 }
 
 static inline void
+__buffered_pio_flush(struct pio_buffer *piobuf, IDEState *s, uint32_t pointer)
+{
+    uint8_t *buf = (uint8_t *)buffered_pio_page + piobuf->page_offset;
+    memcpy(s->data_ptr, buf, pointer);
+    s->data_ptr += pointer;
+}
+
+static inline void
 buffered_pio_flush(struct pio_buffer *piobuf)
 {
     IDEState *s = piobuf->opaque;
     uint32_t pointer = piobuf->pointer;
 
-    if (s != NULL && pointer > 0) {
-        uint8_t *buf = (uint8_t *)buffered_pio_page + piobuf->page_offset;
-        memcpy(s->data_ptr, buf, pointer);
-        s->data_ptr += pointer;
-    }
+    if (s != NULL && pointer > 0)
+        __buffered_pio_flush(piobuf, s, pointer);
 }
 
 static inline void
@@ -500,6 +505,54 @@ buffered_pio_read(IDEState *s, uint32_t 
     piobuf->pointer = 0;
     piobuf->data_end = data_end;
     piobuf->opaque = NULL;
+}
+
+/*
+ * buffered pio reads are undone. It results in normal pio when the domain
+ * is restored.
+ * buffered pio writes are handled before saving domain.
+ * However currently pci_ide_save/load() just discards a pending transfer. XXX
+ */
+static void
+__handle_buffered_pio(struct pio_buffer *piobuf)
+{
+    IDEState *s = piobuf->opaque;
+    uint32_t pointer = piobuf->pointer;
+
+    
+    if (pointer == 0)
+        return;/* no buffered pio */
+
+    if (s != NULL) {
+        /* written data are pending in pio_buffer. process it */
+        __buffered_pio_flush(piobuf, s, pointer);
+    } else {
+        /* data are buffered for pio read in pio_buffer.
+         * undone buffering by buffered_pio_read()
+         */
+        if (pointer > s->data_ptr - s->io_buffer)
+            pointer = s->data_ptr - s->io_buffer;
+        s->data_ptr -= pointer;
+    }
+	
+    piobuf->pointer = 0;
+    piobuf->data_end = 0;
+    piobuf->opaque = NULL;
+}
+
+void
+handle_buffered_pio(void)
+{
+    struct pio_buffer *p1, *p2;
+
+    if (!buffered_pio_page)
+        return;
+
+    p1 = &buffered_pio_page->pio[PIO_BUFFER_IDE_PRIMARY];
+    p2 = &buffered_pio_page->pio[PIO_BUFFER_IDE_SECONDARY];
+
+    __handle_buffered_pio(p1);
+    __handle_buffered_pio(p2);
 }
 
 #else /* !__ia64__ */
diff -r 208908de6975 -r ceee54c9f9f0 tools/ioemu/target-i386-dm/helper2.c
--- a/tools/ioemu/target-i386-dm/helper2.c	Wed Oct 17 15:29:44 2007 +0900
+++ b/tools/ioemu/target-i386-dm/helper2.c	Mon Oct 22 12:44:34 2007 +0900
@@ -635,6 +635,7 @@ int main_loop(void)
         fprintf(logfile, "device model saving state\n");
 
         /* Pull all outstanding ioreqs through the system */
+        handle_buffered_pio();
         handle_buffered_io(env);
         main_loop_wait(1); /* For the select() on events */
 
diff -r 208908de6975 -r ceee54c9f9f0 tools/ioemu/vl.h
--- a/tools/ioemu/vl.h	Wed Oct 17 15:29:44 2007 +0900
+++ b/tools/ioemu/vl.h	Mon Oct 22 12:44:34 2007 +0900
@@ -1494,8 +1494,11 @@ static inline void xc_domain_shutdown_ho
 {
 	xc_ia64_save_to_nvram(xc_handle, domid);
 }
+
+void handle_buffered_pio(void);
 #else
 #define xc_domain_shutdown_hook(xc_handle, domid)	do {} while (0)
+#define handle_buffered_pio()				do {} while (0)
 #endif
 
 #endif /* VL_H */