From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 6/8] ARM: bootm: locate zImage higher into RAM
Date: Fri, 10 Jan 2014 12:05:57 +0100 [thread overview]
Message-ID: <1389351959-20448-7-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1389351959-20448-1-git-send-email-s.hauer@pengutronix.de>
The zImage should be placed where it won't be overwritten by the
uncompressed image, otherwise the kernel decompressing code has
to relocate the zImage before decompression. As Kernels tend to
become bigger put it into 32MiB into RAM if we have enough RAM
available.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
arch/arm/lib/bootm.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 3604df0..11ff98c 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -195,7 +195,17 @@ static int do_bootz_linux(struct image_data *data)
if (load_address == UIMAGE_INVALID_ADDRESS) {
struct memory_bank *bank = list_first_entry(&memory_banks,
struct memory_bank, list);
- data->os_address = bank->start + SZ_8M;
+
+ /*
+ * The kernel should stay in the first 128MiB of RAM, recommended
+ * is 32MiB into RAM so that relocation prior to decompression
+ * can be avoided.
+ */
+ if (mem_size > SZ_64M)
+ data->os_address = bank->start + SZ_32M;
+ else
+ data->os_address = bank->start + SZ_8M;
+
load_address = data->os_address;
if (bootm_verbose(data))
printf("no os load address, defaulting to 0x%08lx\n",
--
1.8.5.2
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next prev parent reply other threads:[~2014-01-10 11:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-10 11:05 bootm + devicetree + much memory Sascha Hauer
2014-01-10 11:05 ` [PATCH 1/8] list: add list_first_entry_or_null() Sascha Hauer
2014-01-10 11:05 ` [PATCH 2/8] bootm: introduce bootm_load_os helper Sascha Hauer
2014-01-10 11:05 ` [PATCH 3/8] ARM: bootm: move os loading to do_bootm_linux Sascha Hauer
2014-01-10 11:05 ` [PATCH 4/8] bootm: introduce bootm_load_initrd helper Sascha Hauer
2014-01-10 11:05 ` [PATCH 5/8] bootm: introduce bootm_load_devicetree helper Sascha Hauer
2014-01-10 11:05 ` Sascha Hauer [this message]
2014-01-10 11:05 ` [PATCH 7/8] ARM: bootm: determine RAM start in separate function Sascha Hauer
2014-01-10 11:05 ` [PATCH 8/8] ARM: bootm: pass free memory to __do_bootm_linux Sascha Hauer
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