From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Date: Thu, 2 May 2019 17:00:22 +0000 (+0300)
Subject: xen/arm: Add early printk support for SCIFA compatible UARTs
X-Git-Tag: archive/raspbian/4.14.0+80-gd101b417b7-1+rpi1^2~63^2~2233
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=ca135a4863ffeedca451651835fcd9aef6c872ff;p=xen.git

xen/arm: Add early printk support for SCIFA compatible UARTs

This patch makes possible to use existing early prink code
for Renesas "Stout" board based on R-Car H2 SoC (SCIFA).

The "EARLY_PRINTK_VERSION" for that board should be 'A':
CONFIG_EARLY_PRINTK=scif,0xe6c40000,A

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Acked-by: Julien Grall <julien.grall@arm.com>
---

diff --git a/xen/arch/arm/arm32/debug-scif.inc b/xen/arch/arm/arm32/debug-scif.inc
index 6f60e015c0..3f01c909c2 100644
--- a/xen/arch/arm/arm32/debug-scif.inc
+++ b/xen/arch/arm/arm32/debug-scif.inc
@@ -1,7 +1,7 @@
 /*
  * xen/arch/arm/arm32/debug-scif.inc
  *
- * SCIF specific debug code
+ * SCIF(A) specific debug code
  *
  * Oleksandr Tyshchenko <oleksandr.tyshchenko@globallogic.com>
  * Copyright (C) 2014, Globallogic.
@@ -22,6 +22,9 @@
 #ifdef EARLY_PRINTK_VERSION_NONE
 #define STATUS_REG    SCIF_SCFSR
 #define TX_FIFO_REG   SCIF_SCFTDR
+#elif EARLY_PRINTK_VERSION_A
+#define STATUS_REG    SCIFA_SCASSR
+#define TX_FIFO_REG   SCIFA_SCAFTDR
 #endif
 
 /*