API for external applications.
This is an API for external (standalone) applications running on top of
U-Boot, and is meant to be more extensible and robust than the existing
jumptable mechanism. It is similar to UNIX syscall approach. See api/README
for more details.
Included is the demo application using this new framework (api_examples).
Please note this is still an experimental feature, and is turned off by
default.
Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
diff --git a/api_examples/crt0.S b/api_examples/crt0.S
new file mode 100644
index 0000000..8d4f706
--- /dev/null
+++ b/api_examples/crt0.S
@@ -0,0 +1,50 @@
+/*
+ * (C) Copyright 2007 Semihalf
+ *
+ * Written by: Rafal Jaworowski <raj@semihalf.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#if defined(CONFIG_PPC)
+
+ .text
+
+ .globl _start
+_start:
+ b main
+
+
+ .globl syscall
+syscall:
+ lis %r11, syscall_ptr@ha
+ addi %r11, %r11, syscall_ptr@l
+ lwz %r11, 0(%r11)
+ mtctr %r11
+ bctr
+
+
+ .globl syscall_ptr
+syscall_ptr:
+ .align 4
+ .long 0
+#else
+#error No support for this arch!
+#endif
