1 files changed, 47 insertions, 0 deletions

diff --git a/scripts/presyn/firmware.S b/scripts/presyn/firmware.S
new file mode 100644
index 0000000..ec5caaa
--- /dev/null
+++ b/scripts/presyn/firmware.S
@@ -0,0 +1,47 @@
+.section .init
+.global main
+
+entry:
+
+/* zero-initialize all registers */
+addi x1, zero, 0
+addi x2, zero, 0
+addi x3, zero, 0
+addi x4, zero, 0
+addi x5, zero, 0
+addi x6, zero, 0
+addi x7, zero, 0
+addi x8, zero, 0
+addi x9, zero, 0
+addi x10, zero, 0
+addi x11, zero, 0
+addi x12, zero, 0
+addi x13, zero, 0
+addi x14, zero, 0
+addi x15, zero, 0
+addi x16, zero, 0
+addi x17, zero, 0
+addi x18, zero, 0
+addi x19, zero, 0
+addi x20, zero, 0
+addi x21, zero, 0
+addi x22, zero, 0
+addi x23, zero, 0
+addi x24, zero, 0
+addi x25, zero, 0
+addi x26, zero, 0
+addi x27, zero, 0
+addi x28, zero, 0
+addi x29, zero, 0
+addi x30, zero, 0
+addi x31, zero, 0
+
+/* set stack pointer */
+lui sp, %hi(16*1024)
+addi sp, sp, %lo(16*1024)
+
+/* call main */
+jal ra, main
+
+/* break */
+ebreak