lkml.org 
[lkml]   [2017]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RESEND PATCH 1/2] arm:omap2+: put omap_uart_phys/virt/lsr in .text section when ZIMAGE is true
Date
 omap_uart_phys, omap_uart_virt and omap_uart_lsr reside in .data section
and it's right implementation. But because of this, we cannot enable
CONFIG_DEBUG_UNCOMPRESS. LL_DEBUG and DEBUG_UNCOMPRESS are very useful tools
for debugging early boot stage when something goes wrong if you don't have
any hardware based debugging tools like a JTAG debugger.
This patch is to put the variables into .text section instead only when the
DEBUG_LL_INCLUDE file is included in the kernel decompressor, which is only
when ZIMAGE is defined.
This patch does not change anything when DEBUG_LL_INCLUDE is included in
the other kernel parts like arch/arm/kernel/*

Signed-off-by: Hoeun Ryu <hoeun.ryu@gmail.com>
---
* to mail to relevant recipients, no respond yet from them
- TO=Tony Lindgren <tony@atomide.com>
- CC=linux-omap@vger.kernel.org
* indentical to previous patch

arch/arm/include/debug/omap2plus.S | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/arch/arm/include/debug/omap2plus.S b/arch/arm/include/debug/omap2plus.S
index 6d867ae..6ce6ef9 100644
--- a/arch/arm/include/debug/omap2plus.S
+++ b/arch/arm/include/debug/omap2plus.S
@@ -58,11 +58,22 @@

#define UART_OFFSET(addr) ((addr) & 0x00ffffff)

+/*
+ * Definition of ZIMAGE is in arch/arm/boot/compressed/Makefile.
+ * Place the following block in .text section only when this file is
+ * included by arch/arm/boot/compressed/* to make it possible to
+ * enable CONFIG_DEBUG_UNCOMPRESS and DEBUG in arch/arm/boot/compressed/head.S
+ * on OMAP2+ SoCs.
+ */
+#ifndef ZIMAGE
.pushsection .data
+#endif
omap_uart_phys: .word 0
omap_uart_virt: .word 0
omap_uart_lsr: .word 0
+#ifndef ZIMAGE
.popsection
+#endif

.macro addruart, rp, rv, tmp

--
2.7.4
\
 
 \ /
  Last update: 2017-06-13 03:15    [W:1.501 / U:1.380 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site