From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: barebox@lists.infradead.org
Subject: [PATCH 07/12] decompressor: import malloc/free implementation for linux 3.4
Date: Mon, 30 Jul 2012 12:02:40 +0200 [thread overview]
Message-ID: <1343642565-32257-7-git-send-email-plagnioj@jcrosoft.com> (raw)
In-Reply-To: <1343642565-32257-1-git-send-email-plagnioj@jcrosoft.com>
This is need for gunzip support
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
include/linux/decompress/mm.h | 68 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
create mode 100644 include/linux/decompress/mm.h
diff --git a/include/linux/decompress/mm.h b/include/linux/decompress/mm.h
new file mode 100644
index 0000000..0c35411
--- /dev/null
+++ b/include/linux/decompress/mm.h
@@ -0,0 +1,68 @@
+/*
+ * linux/compr_mm.h
+ *
+ * Memory management for pre-boot and ramdisk uncompressors
+ *
+ * Authors: Alain Knaff <alain@knaff.lu>
+ *
+ */
+
+#ifndef DECOMPR_MM_H
+#define DECOMPR_MM_H
+
+#ifdef STATIC
+
+/* Code active when included from pre-boot environment: */
+
+/*
+ * Some architectures want to ensure there is no local data in their
+ * pre-boot environment, so that data can arbitrarily relocated (via
+ * GOT references). This is achieved by defining STATIC_RW_DATA to
+ * be null.
+ */
+#ifndef STATIC_RW_DATA
+#define STATIC_RW_DATA static
+#endif
+
+/* A trivial malloc implementation, adapted from
+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ */
+STATIC_RW_DATA unsigned long malloc_ptr;
+STATIC_RW_DATA int malloc_count;
+
+static void *malloc(int size)
+{
+ void *p;
+
+ if (size < 0)
+ return NULL;
+ if (!malloc_ptr)
+ malloc_ptr = free_mem_ptr;
+
+ malloc_ptr = (malloc_ptr + 3) & ~3; /* Align */
+
+ p = (void *)malloc_ptr;
+ malloc_ptr += size;
+
+ if (free_mem_end_ptr && malloc_ptr >= free_mem_end_ptr)
+ return NULL;
+
+ malloc_count++;
+ return p;
+}
+
+static void free(void *where)
+{
+ malloc_count--;
+ if (!malloc_count)
+ malloc_ptr = free_mem_ptr;
+}
+
+#define large_malloc(a) malloc(a)
+#define large_free(a) free(a)
+
+#define INIT
+
+#endif /* STATIC */
+
+#endif /* DECOMPR_MM_H */
--
1.7.10.4
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next prev parent reply other threads:[~2012-07-30 10:03 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-30 10:00 [PATCH 00/12 v3] Add Pre-Bootloader support Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` [PATCH 01/12] kbuild: Init all relevant variables used in kbuild files so Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` [PATCH 02/12] kbuild: add pre-bootloader (pbl) target Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` [PATCH 03/12] Add pre-bootloader (pbl) image support Jean-Christophe PLAGNIOL-VILLARD
2012-08-02 15:29 ` Sascha Hauer
2012-08-03 6:50 ` Sascha Hauer
2012-08-03 7:06 ` Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` [PATCH 04/12] pbl: discard unwind symbol if enable in barebox Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` [PATCH 05/12] Add compressed image support Jean-Christophe PLAGNIOL-VILLARD
2012-08-02 15:30 ` Sascha Hauer
2012-08-02 15:34 ` Jean-Christophe PLAGNIOL-VILLARD
2012-08-03 6:34 ` Sascha Hauer
2012-07-30 10:02 ` [PATCH 06/12] only compress default env in uncompressed images Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` Jean-Christophe PLAGNIOL-VILLARD [this message]
2012-07-30 10:02 ` [PATCH 08/12] ARM: add early malloc support needed by the decompressor Jean-Christophe PLAGNIOL-VILLARD
2012-08-02 15:23 ` Sascha Hauer
2012-07-30 10:02 ` [PATCH 09/12] compressed image: add gzip support Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` [PATCH 10/12] at91: add lowlevel init to the pbl Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` [PATCH 11/12] kbuild: allow to have custom cppflags for pbl Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:02 ` [PATCH 12/12] arm: always enable the garbage collector " Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 10:38 ` [PATCH 00/12 v3] Add Pre-Bootloader support Juergen Beisert
2012-07-30 14:44 ` Thomas Petazzoni
2012-07-30 15:02 ` Jean-Christophe PLAGNIOL-VILLARD
2012-07-30 15:51 ` Juergen Beisert
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