Merge branch 'master' of git://git.denx.de/u-boot-arm

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 37e4d1b09d2e06da834bfcba2e13a2a4844e68ac..cdccae995392afdd649f5dee338a1a23358f478c 100644 (file)
--- a/README
+++ b/README
@@ -3751,6 +3751,22 @@ Configuration Settings:
 - CONFIG_SYS_MALLOC_LEN:
                Size of DRAM reserved for malloc() use.
 
+- CONFIG_SYS_MALLOC_F_LEN
+               Size of the malloc() pool for use before relocation. If
+               this is defined, then a very simple malloc() implementation
+               will become available before relocation. The address is just
+               below the global data, and the stack is moved down to make
+               space.
+
+               This feature allocates regions with increasing addresses
+               within the region. calloc() is supported, but realloc()
+               is not available. free() is supported but does nothing.
+               The memory will be freed (or in fact just forgotton) when
+               U-Boot relocates itself.
+
+               Pre-relocation malloc() is only supported on sandbox
+               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,