arm: Support pre-relocation malloc()

Add support for re-relocation malloc() in arm's start-up code. Signed-off-by: Simon Glass <sjg@chromium.org>

arm: Support pre-relocation malloc()
Add support for re-relocation malloc() in arm's start-up code. Signed-off-by: Simon Glass <sjg@chromium.org>
Simon Glass
1 parent aae2aef9c8
Showing 2 changed files with 7 additions and 1 deletions Side-by-side Diff
README
arch/arm/lib/crt0.S
@@ -3752,6 +3752,9 @@
 		Pre-relocation malloc() is only supported on sandbox
 		at present but is fairly easy to enable for other archs.
  
+		Pre-relocation malloc() is only supported on ARM at present
+		but is fairly easy to enable for other archs.
+
 - CONFIG_SYS_BOOTM_LEN:
 		Normally compressed uImages are limited to an
 		uncompressed size of 8 MBytes. If this is not enough,
@@ -78,7 +78,10 @@
 	strlo	r0, [r1]		/* clear 32-bit GD word */
 	addlo	r1, r1, #4		/* move to next */
 	blo	clr_gd
-
+#if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SPL_BUILD)
+	sub	sp, sp, #CONFIG_SYS_MALLOC_F_LEN
+	str	sp, [r9, #GD_MALLOC_BASE]
+#endif
 	/* mov r0, #0 not needed due to above code */
 	bl	board_init_f
...	...	@@ -3752,6 +3752,9 @@
3752	3752	Pre-relocation malloc() is only supported on sandbox
3753	3753	at present but is fairly easy to enable for other archs.
3754	3754
	3755	+ Pre-relocation malloc() is only supported on ARM at present
	3756	+ but is fairly easy to enable for other archs.
	3757	+
3755	3758	- CONFIG_SYS_BOOTM_LEN:
3756	3759	Normally compressed uImages are limited to an
3757	3760	uncompressed size of 8 MBytes. If this is not enough,
...	...	@@ -78,7 +78,10 @@
78	78	strlo r0, [r1] /* clear 32-bit GD word */
79	79	addlo r1, r1, #4 /* move to next */
80	80	blo clr_gd
81		-
	81	+#if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SPL_BUILD)
	82	+ sub sp, sp, #CONFIG_SYS_MALLOC_F_LEN
	83	+ str sp, [r9, #GD_MALLOC_BASE]
	84	+#endif
82	85	/* mov r0, #0 not needed due to above code */
83	86	bl board_init_f
84	87