1 files changed, 52 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/include/mach/uncompress.h b/arch/arm/mach-ixp4xx/include/mach/uncompress.h
new file mode 100644
index 000000000..9e08b270c
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/include/mach/uncompress.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-ixp4xx/include/mach/uncompress.h 
+ *
+ * Copyright (C) 2002 Intel Corporation.
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ */
+
+#ifndef _ARCH_UNCOMPRESS_H_
+#define _ARCH_UNCOMPRESS_H_
+
+#include "ixp4xx-regs.h"
+#include <asm/mach-types.h>
+#include <linux/serial_reg.h>
+
+#define TX_DONE (UART_LSR_TEMT|UART_LSR_THRE)
+
+volatile u32* uart_base;
+
+static inline void putc(int c)
+{
+	/* Check THRE and TEMT bits before we transmit the character.
+	 */
+	while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE)
+		barrier();
+
+	*uart_base = c;
+}
+
+static void flush(void)
+{
+}
+
+static __inline__ void __arch_decomp_setup(unsigned long arch_id)
+{
+	/*
+	 * Some boards are using UART2 as console
+	 */
+	if (machine_is_adi_coyote() || machine_is_gtwx5715() ||
+	    machine_is_gateway7001() || machine_is_wg302v2() ||
+	    machine_is_devixp() || machine_is_miccpt() || machine_is_mic256())
+		uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS;
+	else
+		uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS;
+}
+
+/*
+ * arch_id is a variable in decompress_kernel()
+ */
+#define arch_decomp_setup()	__arch_decomp_setup(arch_id)
+
+#endif