Initial import

1 files changed, 80 insertions, 0 deletions

diff --git a/firmware/start.S b/firmware/start.S
new file mode 100644
index 0000000..34e44d8
--- /dev/null
+++ b/firmware/start.S
@@ -0,0 +1,80 @@
+	.section .text
+	.global start
+	.global sieve
+	.global stats
+
+#define TEST(n) \
+	.global n; .global n ## _ret; \
+	jal zero,n; n ## _ret:
+
+start:
+	TEST(lui)
+	TEST(auipc)
+	TEST(j)
+	TEST(jal)
+	TEST(jalr)
+
+	TEST(beq)
+	TEST(bne)
+	TEST(blt)
+	TEST(bge)
+	TEST(bltu)
+	TEST(bgeu)
+
+	TEST(lb)
+	TEST(lh)
+	TEST(lw)
+	TEST(lbu)
+	TEST(lhu)
+
+	TEST(sb)
+	TEST(sh)
+	TEST(sw)
+
+	TEST(addi)
+	TEST(slti) // also tests sltiu
+	TEST(xori)
+	TEST(ori)
+	TEST(andi)
+	TEST(slli)
+	TEST(srli)
+	TEST(srai)
+
+	TEST(add)
+	TEST(sub)
+	TEST(sll)
+	TEST(slt) // what is with sltu ?
+	TEST(xor)
+	TEST(srl)
+	TEST(sra)
+	TEST(or)
+	TEST(and)
+
+	TEST(fence_i)
+	TEST(simple)
+
+	/* set stack pointer */
+	lui sp,(64*1024)>>12
+
+	/* jump to sieve C code */
+	jal ra,sieve
+
+	/* jump to stats C code */
+	jal ra,stats
+
+	/* print "DONE\n" */
+	lui a0,0x10000000>>12
+	addi a1,zero,'D'
+	addi a2,zero,'O'
+	addi a3,zero,'N'
+	addi a4,zero,'E'
+	addi a5,zero,'\n'
+	sw a1,0(a0)
+	sw a2,0(a0)
+	sw a3,0(a0)
+	sw a4,0(a0)
+	sw a5,0(a0)
+
+	/* break */
+	sbreak
+