From: Ian Campbell <ian.campbell@citrix.com>
To: xen-devel@lists.xen.org
Cc: Ian Campbell <ian.campbell@citrix.com>
Subject: [PATCH 01/16] arm: Zero the BSS at start of day.
Date: Mon, 3 Sep 2012 13:30:41 +0000 [thread overview]
Message-ID: <1346679056-8108-1-git-send-email-ian.campbell@citrix.com> (raw)
In-Reply-To: <1346678886.32462.9.camel@zakaz.uk.xensource.com>
Avoids surprises e.g. when loading via the boot-wrapper.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---
xen/arch/arm/head.S | 20 +++++++++++++++++++-
xen/arch/arm/xen.lds.S | 1 +
2 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/xen/arch/arm/head.S b/xen/arch/arm/head.S
index cdbe011..131cdf9 100644
--- a/xen/arch/arm/head.S
+++ b/xen/arch/arm/head.S
@@ -127,8 +127,26 @@ boot_cpu:
add pc, r0, r10 /* Call PA of function */
hyp:
- PRINT("- Setting up control registers -\r\n")
+ /* Zero BSS On the boot CPU to avoid nasty surprises */
+ teq r12, #0
+ bne skip_bss
+
+ PRINT("- Zero BSS -\r\n")
+ ldr r0, =__bss_start /* Load start & end of bss */
+ ldr r1, =__bss_end
+ add r0, r0, r10 /* Apply physical offset */
+ add r1, r1, r10
+
+ mov r2, #0
+1: str r2, [r0], #4
+ cmp r0, r1
+ blo 1b
+
+skip_bss:
+
+ PRINT("- Setting up control registers -\r\n")
+
/* Set up memory attribute type tables */
ldr r0, =MAIR0VAL
ldr r1, =MAIR1VAL
diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S
index 4a9d086..410d7db 100644
--- a/xen/arch/arm/xen.lds.S
+++ b/xen/arch/arm/xen.lds.S
@@ -119,6 +119,7 @@ SECTIONS
*(.bss.percpu.read_mostly)
. = ALIGN(SMP_CACHE_BYTES);
__per_cpu_data_end = .;
+ __bss_end = .;
} :text
_end = . ;
--
1.7.9.1
next prev parent reply other threads:[~2012-09-03 13:30 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-03 13:28 [PATCH 0/16] arm: support for initial modules (e.g. dom0) and DTB supplied in RAM Ian Campbell
2012-09-03 13:30 ` Ian Campbell [this message]
2012-09-06 9:56 ` [PATCH 01/16] arm: Zero the BSS at start of day Tim Deegan
2012-09-03 13:30 ` [PATCH 02/16] Create a raw binary target Ian Campbell
2012-09-06 10:01 ` Tim Deegan
2012-09-06 10:29 ` Ian Campbell
2012-09-03 13:30 ` [PATCH 03/16] arm: make virtual address defines unsigned Ian Campbell
2012-09-06 10:02 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 04/16] arm: handle xenheap which isn't at the start of RAM Ian Campbell
2012-09-06 11:36 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 05/16] arm: move get_paddr_function to arch setup.c from device_tree.c Ian Campbell
2012-09-06 11:40 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 06/16] arm: parse modules from DT during early boot Ian Campbell
2012-09-06 11:47 ` Tim Deegan
2012-09-06 11:53 ` Ian Campbell
2012-11-30 14:58 ` Stefano Stabellini
2012-09-03 13:30 ` [PATCH 07/16] arm: avoid placing Xen over any modules Ian Campbell
2012-09-06 12:01 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 08/16] arm: really allocate boot frametable pages with 32M alignment Ian Campbell
2012-09-06 12:04 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 09/16] arm: avoid allocating the heaps over modules or xen itself Ian Campbell
2012-09-06 12:08 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 10/16] arm: print a message if multiple banks of memory are present Ian Campbell
2012-09-06 12:31 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 11/16] arm: mark heap and frametable limits as read mostly Ian Campbell
2012-09-06 13:29 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 12/16] arm: const-correctness in virt_to_maddr Ian Campbell
2012-09-06 13:33 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 13/16] device-tree: get_val cannot cope with cells > 2, add a BUG Ian Campbell
2012-09-06 13:35 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 14/16] arm: load dom0 kernel from first boot module Ian Campbell
2012-09-06 13:44 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 15/16] arm: discard boot modules after building domain 0 Ian Campbell
2012-09-06 13:53 ` Tim Deegan
2012-09-06 13:57 ` Ian Campbell
2012-09-06 14:03 ` Tim Deegan
2012-09-03 13:30 ` [PATCH 16/16] arm: use /chosen/module1-args for domain 0 command line Ian Campbell
2012-09-06 13:50 ` Tim Deegan
2012-09-06 13:55 ` Ian Campbell
2012-09-06 13:58 ` Tim Deegan
2012-09-06 13:59 ` Ian Campbell
2012-09-06 14:19 ` David Vrabel
2012-09-06 14:28 ` Ian Campbell
2012-09-06 14:46 ` [PATCH 0/16] arm: support for initial modules (e.g. dom0) and DTB supplied in RAM David Vrabel
2012-09-10 16:12 ` Ian Campbell
2012-09-17 11:39 ` Stefano Stabellini
2012-10-11 14:57 ` Ian Campbell
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