1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/include/mach/uncompress.h b/arch/arm/mach-pxa/include/mach/uncompress.h
new file mode 100644
index 000000000..c36306064
--- /dev/null
+++ b/arch/arm/mach-pxa/include/mach/uncompress.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/mach-pxa/include/mach/uncompress.h
+ *
+ * Author:	Nicolas Pitre
+ * Copyright:	(C) 2001 MontaVista Software Inc.
+ */
+
+#include <linux/serial_reg.h>
+#include <asm/mach-types.h>
+
+#define FFUART_BASE	(0x40100000)
+#define BTUART_BASE	(0x40200000)
+#define STUART_BASE	(0x40700000)
+
+unsigned long uart_base;
+unsigned int uart_shift;
+unsigned int uart_is_pxa;
+
+static inline unsigned char uart_read(int offset)
+{
+	return *(volatile unsigned char *)(uart_base + (offset << uart_shift));
+}
+
+static inline void uart_write(unsigned char val, int offset)
+{
+	*(volatile unsigned char *)(uart_base + (offset << uart_shift)) = val;
+}
+
+static inline int uart_is_enabled(void)
+{
+	/* assume enabled by default for non-PXA uarts */
+	return uart_is_pxa ? uart_read(UART_IER) & UART_IER_UUE : 1;
+}
+
+static inline void putc(char c)
+{
+	if (!uart_is_enabled())
+		return;
+
+	while (!(uart_read(UART_LSR) & UART_LSR_THRE))
+		barrier();
+
+	uart_write(c, UART_TX);
+}
+
+/*
+ * This does not append a newline
+ */
+static inline void flush(void)
+{
+}
+
+static inline void arch_decomp_setup(void)
+{
+	/* initialize to default */
+	uart_base = FFUART_BASE;
+	uart_shift = 2;
+	uart_is_pxa = 1;
+
+	if (machine_is_littleton() || machine_is_intelmote2()
+	    || machine_is_csb726() || machine_is_stargate2()
+	    || machine_is_cm_x300() || machine_is_balloon3())
+		uart_base = STUART_BASE;
+
+	if (machine_is_arcom_zeus()) {
+		uart_base = 0x10000000;	/* nCS4 */
+		uart_shift = 1;
+		uart_is_pxa = 0;
+	}
+}