board_f: reserve noncached space below malloc area

Noncached area at present is being initialized to random space after malloc
area. It works in most the cases as it goes to stack area & stack is not
overwriting it being far from it.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>

diff --git a/common/board_f.c b/common/board_f.c
index 31181a9dc4510c2b23bfc498e901479f71fb432b..6867abc8e67936455760de0d0af652e28fdec7bf 100644 (file)
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -467,12 +467,29 @@ static int reserve_uboot(void)
        return 0;
 }
 
+#ifdef CONFIG_SYS_NONCACHED_MEMORY
+static int reserve_noncached(void)
+{
+       /* round down to SECTION SIZE (typicaly 1MB) limit */
+       gd->start_addr_sp &= ~(MMU_SECTION_SIZE - 1);
+       gd->start_addr_sp -= CONFIG_SYS_NONCACHED_MEMORY;
+       debug("Reserving %dM for noncached_alloc() at: %08lx\n",
+             CONFIG_SYS_NONCACHED_MEMORY >> 20, gd->start_addr_sp);
+
+       return 0;
+}
+#endif
+
 /* reserve memory for malloc() area */
 static int reserve_malloc(void)
 {
        gd->start_addr_sp = gd->start_addr_sp - TOTAL_MALLOC_LEN;
        debug("Reserving %dk for malloc() at: %08lx\n",
              TOTAL_MALLOC_LEN >> 10, gd->start_addr_sp);
+#ifdef CONFIG_SYS_NONCACHED_MEMORY
+       reserve_noncached();
+#endif
+
        return 0;
 }