Using mmap to allocate memory from the OS for RAM simulation we can use
u-boot own malloc implementation.
Signed-off-by: Matthias Weisser <weiss...@arcor.de>
---
Changes in V4:
Rebased to current HEAD
Changes in V3:
Fixed a build warning
Changes in V2:
Removed the address hint for mmap
Removed the special handling of dlmalloc in common
Set gd->bd->bi_dram[0].start to 0 again
arch/sandbox/cpu/os.c | 7 +++++++
arch/sandbox/lib/board.c | 17 ++++++++++-------
common/Makefile | 3 ---
include/os.h | 8 ++++++++
4 files changed, 25 insertions(+), 10 deletions(-)
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index f80faac..b7c3bf5 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -25,6 +25,7 @@
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/mman.h>
#include <os.h>
@@ -87,3 +88,9 @@ void os_tty_raw(int fd)
atexit(os_fd_restore);
}
+
+void *os_malloc(size_t length)
+{
+ return mmap(NULL, length, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+}
diff --git a/arch/sandbox/lib/board.c b/arch/sandbox/lib/board.c
index ae5a517..b7997e9 100644
--- a/arch/sandbox/lib/board.c
+++ b/arch/sandbox/lib/board.c
@@ -45,8 +45,12 @@
#include <version.h>
#include <serial.h>
+#include <os.h>
+
DECLARE_GLOBAL_DATA_PTR;
+static gd_t gd_mem;
+
/************************************************************************
* Init Utilities *
************************************************************************
@@ -147,7 +151,7 @@ void board_init_f(ulong bootflag)
uchar *mem;
unsigned long addr_sp, addr, size;
- gd = malloc(sizeof(gd_t));
+ gd = &gd_mem;
assert(gd);
memset((void *)gd, 0, sizeof(gd_t));
@@ -158,7 +162,8 @@ void board_init_f(ulong bootflag)
}
size = CONFIG_SYS_SDRAM_SIZE;
- mem = malloc(size);
+ mem = os_malloc(CONFIG_SYS_SDRAM_SIZE);
+
assert(mem);
gd->ram_buf = mem;
addr = (ulong)(mem + size);
@@ -214,11 +219,9 @@ void board_init_r(gd_t *id, ulong dest_addr)
post_output_backlog();
#endif
-#if 0 /* Sandbox uses system malloc for now */
- /* The Malloc area is immediately below the monitor copy in DRAM */
- malloc_start = dest_addr - TOTAL_MALLOC_LEN;
- mem_malloc_init(malloc_start, TOTAL_MALLOC_LEN);
-#endif
+ /* The Malloc area is at the top of simulated DRAM */
+ mem_malloc_init((ulong)gd->ram_buf + gd->ram_size - TOTAL_MALLOC_LEN,
+ TOTAL_MALLOC_LEN);
/* initialize environment */
env_relocate();
diff --git a/common/Makefile b/common/Makefile
index 1b672ad..015c17e 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -29,9 +29,6 @@ LIB = $(obj)libcommon.o
ifndef CONFIG_SPL_BUILD
COBJS-y += main.o
COBJS-y += command.o
-ifndef CONFIG_SANDBOX
-COBJS-y += dlmalloc.o
-endif
COBJS-y += exports.o
COBJS-$(CONFIG_SYS_HUSH_PARSER) += hush.o
COBJS-y += image.o
diff --git a/include/os.h b/include/os.h
index d5df22f..fd4120c 100644
--- a/include/os.h
+++ b/include/os.h
@@ -76,3 +76,11 @@ void os_exit(int exit_code);
* Put tty into raw mode to mimic serial console better
*/
void os_tty_raw(int fd);
+
+/**
+ * Acquires some memory from the underlying os.
+ *
+ * \param length Number of bytes to be allocated
+ * \return Pointer to length bytes or NULL on error
+ */
+void *os_malloc(size_t length);
--
1.7.4.1
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