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-rw-r--r--arch/arm/include/debug/sti.S39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/include/debug/sti.S b/arch/arm/include/debug/sti.S
new file mode 100644
index 000000000..dc796ac2a
--- /dev/null
+++ b/arch/arm/include/debug/sti.S
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/include/debug/sti.S
+ *
+ * Debugging macro include header
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ */
+
+#define ASC_TX_BUF_OFF 0x04
+#define ASC_CTRL_OFF 0x0c
+#define ASC_STA_OFF 0x14
+
+#define ASC_STA_TX_FULL (1<<9)
+#define ASC_STA_TX_EMPTY (1<<1)
+
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS @ physical base
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT @ virt base
+ .endm
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #ASC_TX_BUF_OFF]
+ .endm
+
+ .macro waituartcts,rd,rx
+ .endm
+
+ .macro waituarttxrdy,rd,rx
+1001: ldr \rd, [\rx, #ASC_STA_OFF]
+ tst \rd, #ASC_STA_TX_FULL
+ bne 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #ASC_STA_OFF]
+ tst \rd, #ASC_STA_TX_EMPTY
+ beq 1001b
+ .endm