Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / openbios / arch / unix / blk.c

diff --git a/qemu/roms/openbios/arch/unix/blk.c b/qemu/roms/openbios/arch/unix/blk.c
new file mode 100644 (file)
index 0000000..d0f5c6a
--- /dev/null
+++ b/qemu/roms/openbios/arch/unix/blk.c
@@ -0,0 +1,115 @@
+/*
+ *  <arch/unix/blk.c>
+ *
+ *     block device emulation for unix hosts
+ *
+ *   Copyright (C) 2004 Stefan Reinauer <stepan@openbios.org>
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   version 2
+ *
+ */
+
+#include "config.h"
+#include "libopenbios/bindings.h"
+#include "blk.h"
+
+typedef struct {
+       int     unit;
+       int     channel;
+} blk_data_t;
+
+
+DECLARE_NODE( blk, INSTALL_OPEN, sizeof(blk_data_t), "+/unix/block/disk" );
+
+static void
+blk_open( blk_data_t *pb )
+{
+       phandle_t ph;
+
+       fword("my-unit");
+
+       pb->unit = POP();
+       pb->channel = 0;        /* FIXME */
+
+       selfword("open-deblocker");
+
+       /* interpose disk-label */
+       ph = find_dev("/packages/disk-label");
+       fword("my-args");
+       PUSH_ph( ph );
+       fword("interpose");
+
+       /* printk("osi-blk: open %d\n", pb->unit ); */
+
+       PUSH( -1 );
+}
+
+static void
+blk_close( __attribute__((unused)) blk_data_t *pb )
+{
+       selfword("close-deblocker");
+}
+
+
+/* ( buf blk nblks -- actual ) */
+static void
+blk_read_blocks( blk_data_t *pb )
+{
+       cell i, n = POP();
+       cell blk = POP();
+       char *dest = (char*)POP();
+
+       // printk("blk_read_blocks %x block=%d n=%d\n", (ucell)dest, blk, n );
+
+       for( i=0; i<n; ) {
+               char buf[4096];
+               ucell m = MIN( n-i, sizeof(buf)/512 );
+
+               if( read_from_disk(pb->channel, pb->unit, blk+i, (ucell)buf, m*512) < 0 ) {
+                       printk("read_from_disk: error\n");
+                       RET(0);
+               }
+               memcpy( dest, buf, m * 512 );
+               i += m;
+               dest += m * 512;
+       }
+       PUSH( n );
+}
+
+/* ( -- bs ) */
+static void
+blk_block_size( __attribute__((unused)) blk_data_t *pb )
+{
+       PUSH( 512 );
+}
+
+/* ( -- maxbytes ) */
+static void
+blk_max_transfer( __attribute__((unused)) blk_data_t *pb )
+{
+       PUSH( 1024*1024 );
+}
+
+static void
+blk_initialize( __attribute__((unused)) blk_data_t *pb )
+{
+       fword("is-deblocker");
+}
+
+
+NODE_METHODS( blk ) = {
+       { NULL,                 blk_initialize  },
+       { "open",               blk_open        },
+       { "close",              blk_close       },
+       { "read-blocks",        blk_read_blocks },
+       { "block-size",         blk_block_size  },
+       { "max-transfer",       blk_max_transfer},
+};
+
+void
+blk_init( void )
+{
+       REGISTER_NODE( blk );
+}