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authorSimon Glass <sjg@chromium.org>2015-10-19 06:49:57 -0600
committerTom Rini <trini@konsulko.com>2015-10-24 13:50:35 -0400
commit12360982fa03b8d6ff9140f05067c3a8635c3540 (patch)
tree62a1d4ce06c4cd95f8bd21310e5b7ba711534a59
parentaf6bbd4daefc314cc422381580f11fabc9cb222f (diff)
board_init_f_mem(): Don't require memset()
Unfortunately memset() is not always available, so provide a substitute when needed. Signed-off-by: Simon Glass <sjg@chromium.org>
-rw-r--r--common/init/board_init.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/common/init/board_init.c b/common/init/board_init.c
index e7ebca70c4f..1c6126d8ce5 100644
--- a/common/init/board_init.c
+++ b/common/init/board_init.c
@@ -11,6 +11,16 @@
DECLARE_GLOBAL_DATA_PTR;
+/*
+ * It isn't trivial to figure out whether memcpy() exists. The arch-specific
+ * memcpy() is not normally available in SPL due to code size.
+ */
+#if !defined(CONFIG_SPL_BUILD) || \
+ (defined(CONFIG_SPL_LIBGENERIC_SUPPORT) && \
+ !defined(CONFIG_USE_ARCH_MEMSET))
+#define _USE_MEMCPY
+#endif
+
/* Unfortunately x86 can't compile this code as gd cannot be assigned */
#ifndef CONFIG_X86
__weak void arch_setup_gd(struct global_data *gd_ptr)
@@ -22,6 +32,9 @@ __weak void arch_setup_gd(struct global_data *gd_ptr)
ulong board_init_f_mem(ulong top)
{
struct global_data *gd_ptr;
+#ifndef _USE_MEMCPY
+ int *ptr;
+#endif
/* Leave space for the stack we are running with now */
top -= 0x40;
@@ -29,7 +42,12 @@ ulong board_init_f_mem(ulong top)
top -= sizeof(struct global_data);
top = ALIGN(top, 16);
gd_ptr = (struct global_data *)top;
+#ifdef _USE_MEMCPY
memset(gd_ptr, '\0', sizeof(*gd));
+#else
+ for (ptr = (int *)gd_ptr; ptr < (int *)(gd_ptr + 1); )
+ *ptr++ = 0;
+#endif
arch_setup_gd(gd_ptr);
#if defined(CONFIG_SYS_MALLOC_F)