Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / include / debug / imx.S

diff --git a/kernel/arch/arm/include/debug/imx.S b/kernel/arch/arm/include/debug/imx.S
new file mode 100644 (file)
index 0000000..619d8cc
--- /dev/null
+++ b/kernel/arch/arm/include/debug/imx.S
@@ -0,0 +1,47 @@
+/* arch/arm/mach-imx/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ *  Copyright (C) 1994-1999 Russell King
+ *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include "imx-uart.h"
+
+/*
+ * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
+ * stay sync with that.  It's hard to maintain, and should be fixed
+ * globally for multi-platform build to use a fixed virtual address
+ * for low-level debug uart port across platforms.
+ */
+#define IMX_IO_P2V(x)  (                                               \
+                       (((x) & 0x80000000) >> 7) |                     \
+                       (0xf4000000 +                                   \
+                       (((x) & 0x50000000) >> 6) +                     \
+                       (((x) & 0x0b000000) >> 4) +                     \
+                       (((x) & 0x000fffff))))
+
+#define UART_VADDR     IMX_IO_P2V(UART_PADDR)
+
+               .macro  addruart, rp, rv, tmp
+               ldr     \rp, =UART_PADDR        @ physical
+               ldr     \rv, =UART_VADDR        @ virtual
+               .endm
+
+               .macro  senduart,rd,rx
+               str     \rd, [\rx, #0x40]       @ TXDATA
+               .endm
+
+               .macro  waituart,rd,rx
+               .endm
+
+               .macro  busyuart,rd,rx
+1002:          ldr     \rd, [\rx, #0x98]       @ SR2
+               tst     \rd, #1 << 3            @ TXDC
+               beq     1002b                   @ wait until transmit done
+               .endm