spl: Add spl_early_init()

At present malloc_base/_limit/_ptr are not initialised in spl_init() when
we call spl_init() in board_init_f(). This is due to a recent change aimed
at avoiding overwriting the malloc area set up on some boards by
spl_relocate_stack_gd().

However if CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN is not defined, we now
skip setting up the memory area in spl_init() which is obviously wrong.

To fix this, add a new function spl_early_init() which can be called in
board_init_f().

Fixes: b3d2861e (spl: Remove overwrite of relocated malloc limit)
Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
Rewrote spl_{,early_}init() to avoid duplicate code:
Rewrite/expand commit message:
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Eddie Cai <eddie.cai.linux@gmail.com>

diff --git a/common/spl/spl.c b/common/spl/spl.c
index 766fb3d..2bc8b42 100644 (file)
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -170,22 +170,20 @@ __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
        image_entry();
 }
 
-int spl_init(void)
+static int spl_common_init(bool setup_malloc)
 {
        int ret;
 
-       debug("spl_init()\n");
-/*
- * with CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN we set malloc_base and
- * malloc_limit in spl_relocate_stack_gd
- */
-#if defined(CONFIG_SYS_MALLOC_F_LEN) && \
-       !defined(CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN)
+       debug("spl_early_init()\n");
+
+#if defined(CONFIG_SYS_MALLOC_F_LEN)
+       if (setup_malloc) {
 #ifdef CONFIG_MALLOC_F_ADDR
-       gd->malloc_base = CONFIG_MALLOC_F_ADDR;
+               gd->malloc_base = CONFIG_MALLOC_F_ADDR;
 #endif
-       gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
-       gd->malloc_ptr = 0;
+               gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
+               gd->malloc_ptr = 0;
+       }
 #endif
        if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
                ret = fdtdec_setup();
@@ -202,6 +200,32 @@ int spl_init(void)
                        return ret;
                }
        }
+
+       return 0;
+}
+
+int spl_early_init(void)
+{
+       int ret;
+
+       ret = spl_common_init(true);
+       if (ret)
+               return ret;
+       gd->flags |= GD_FLG_SPL_EARLY_INIT;
+
+       return 0;
+}
+
+int spl_init(void)
+{
+       int ret;
+
+       if (!(gd->flags & GD_FLG_SPL_EARLY_INIT)) {
+               ret = spl_common_init(
+                       !IS_ENABLED(CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN));
+               if (ret)
+                       return ret;
+       }
        gd->flags |= GD_FLG_SPL_INIT;
 
        return 0;

diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index e02863d..5b356dd 100644 (file)
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -127,5 +127,6 @@ typedef struct global_data {
 #define GD_FLG_SKIP_RELOC      0x00800 /* Don't relocate                  */
 #define GD_FLG_RECORD          0x01000 /* Record console                  */
 #define GD_FLG_ENV_DEFAULT     0x02000 /* Default variable flag           */
+#define GD_FLG_SPL_EARLY_INIT  0x04000 /* Early SPL init is done          */
 
 #endif /* __ASM_GENERIC_GBL_DATA_H */

diff --git a/include/spl.h b/include/spl.h
index bde4437..cdd196d 100644 (file)
--- a/include/spl.h
+++ b/include/spl.h
@@ -213,11 +213,29 @@ int spl_load_image_ext_os(struct spl_image_info *spl_image,
                          struct blk_desc *block_dev, int partition);
 
 /**
- * spl_init() - Set up device tree and driver model in SPL if enabled
+ * spl_early_init() - Set up device tree and driver model in SPL if enabled
  *
  * Call this function in board_init_f() if you want to use device tree and
- * driver model early, before board_init_r() is called. This function will
- * be called from board_init_r() if not called earlier.
+ * driver model early, before board_init_r() is called.
+ *
+ * If this is not called, then driver model will be inactive in SPL's
+ * board_init_f(), and no device tree will be available.
+ */
+int spl_early_init(void);
+
+/**
+ * spl_init() - Set up device tree and driver model in SPL if enabled
+ *
+ * You can optionally call spl_early_init(), then optionally call spl_init().
+ * This function will be called from board_init_r() if not called earlier.
+ *
+ * Both spl_early_init() and spl_init() perform a similar function except that
+ * the latter will not set up the malloc() area if
+ * CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN is enabled, since it is assumed to
+ * already be done by a calll to spl_relocate_stack_gd() before board_init_r()
+ * is reached.
+ *
+ * This function will be called from board_init_r() if not called earlier.
  *
  * If this is not called, then driver model will be inactive in SPL's
  * board_init_f(), and no device tree will be available.