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Diffstat (limited to 'qemu/roms/openbios/libopenbios/bootcode_load.c')
-rw-r--r--qemu/roms/openbios/libopenbios/bootcode_load.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/qemu/roms/openbios/libopenbios/bootcode_load.c b/qemu/roms/openbios/libopenbios/bootcode_load.c
new file mode 100644
index 000000000..0fabf55c1
--- /dev/null
+++ b/qemu/roms/openbios/libopenbios/bootcode_load.c
@@ -0,0 +1,99 @@
+/*
+ * Raw bootcode loader (CHRP/Apple %BOOT)
+ * Written by Mark Cave-Ayland 2013
+ */
+
+#include "config.h"
+#include "kernel/kernel.h"
+#include "libopenbios/bindings.h"
+#include "libopenbios/bootcode_load.h"
+#include "libc/diskio.h"
+#include "drivers/drivers.h"
+#define printf printk
+#define debug printk
+
+
+int
+bootcode_load(ihandle_t dev)
+{
+ int retval = -1, count = 0, fd;
+ unsigned long bootcode, loadbase, entry, size, offset;
+ ihandle_t bootcode_info;
+
+ /* Mark the saved-program-state as invalid */
+ feval("0 state-valid !");
+
+ fd = open_ih(dev);
+ if (fd == -1) {
+ goto out;
+ }
+
+ /* If we don't have the get-bootcode-info word then we don't support
+ loading bootcode via %BOOT */
+ bootcode_info = find_ih_method("get-bootcode-info", dev);
+ if (!bootcode_info) {
+ goto out;
+ }
+
+ /* Default to loading at load-base */
+ fword("load-base");
+ loadbase = POP();
+ entry = loadbase;
+ size = 0;
+
+#ifdef CONFIG_PPC
+ /*
+ * Apple OF does not honor load-base and instead uses pmBootLoad
+ * value from the boot partition descriptor.
+ *
+ * Tested with:
+ * a debian image with QUIK installed
+ * a debian image with iQUIK installed (https://github.com/andreiw/quik)
+ * an IQUIK boot floppy
+ * a NetBSD boot floppy (boots stage 2)
+ */
+ if (is_apple()) {
+ PUSH(bootcode_info);
+ fword("execute");
+
+ loadbase = POP();
+ entry = POP();
+ size = POP();
+ }
+#endif
+
+ bootcode = loadbase;
+ offset = 0;
+
+ while(1) {
+ if (seek_io(fd, offset) == -1)
+ break;
+ count = read_io(fd, (void *)bootcode, 512);
+ offset += count;
+ bootcode += count;
+ }
+
+ /* If we didn't read anything then exit */
+ if (!count) {
+ goto out;
+ }
+
+ /* Use proper file size if we got it from bootcode info */
+ if (size == 0) {
+ size = offset;
+ }
+
+ /* Initialise saved-program-state */
+ PUSH(entry);
+ feval("saved-program-state >sps.entry !");
+ PUSH(size);
+ feval("saved-program-state >sps.file-size !");
+ feval("bootcode saved-program-state >sps.file-type !");
+
+ feval("-1 state-valid !");
+
+out:
+ close_io(fd);
+ return retval;
+}
+