Add support for re-relocation malloc() in arm's start-up code.
Signed-off-by: Simon Glass <s...@chromium.org>
---
Changes in v3:
- Rebase on earlier patch
Changes in v2: None
README | 3 +++
arch/arm/lib/crt0.S | 5 ++++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/README b/README
index 11e9d31..73abbf0 100644
--- a/README
+++ b/README
@@ -3749,6 +3749,9 @@ Configuration Settings:
The memory will be freed (or in fact just forgotton) when
U-Boot relocates itself.
+ 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,
diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 43aa212..29cdad0 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -78,7 +78,10 @@ clr_gd:
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
--
2.0.0.526.g5318336
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