From ecc350ca5c2eb50be8309c5f14f8bf0d87db9a02 Mon Sep 17 00:00:00 2001
From: Moon Flower <moonflower@elhenney.local>
Date: Mon, 12 Oct 2026 08:46:23 +0330
Subject: a

---
 src/baremetal/start_riscv.S | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 src/baremetal/start_riscv.S

(limited to 'src/baremetal/start_riscv.S')

diff --git a/src/baremetal/start_riscv.S b/src/baremetal/start_riscv.S
new file mode 100644
index 0000000..527f109
--- /dev/null
+++ b/src/baremetal/start_riscv.S
@@ -0,0 +1,20 @@
+/* RISC-V virt, machine mode, no firmware. Stack, clear bss, enter C. */
+.section .text.init
+.global _start
+_start:
+	/* FS = Dirty, so a compiler that emits float ops does not trap. */
+	li t0, 0x6000
+	csrs mstatus, t0
+	la sp, _stack_top
+	la t0, _sbss
+	la t1, _ebss
+1:
+	bgeu t0, t1, 2f
+	sd zero, 0(t0)
+	addi t0, t0, 8
+	j 1b
+2:
+	call bare_main
+3:
+	wfi
+	j 3b
-- 
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