sandbox: Support pre-relocation malloc()

Set up and zero global data before board_init_f() is called so that we can
remove the need for CONFIG_SYS_GENERIC_GLOBAL_DATA.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/README b/README
index 11e9d31..f704eb3 100644 (file)
--- 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 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,

diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index 5289291..b3d7051 100644 (file)
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -240,6 +240,9 @@ int main(int argc, char *argv[])
 
        memset(&data, '\0', sizeof(data));
        gd = &data;
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+       gd->malloc_base = CONFIG_MALLOC_F_ADDR;
+#endif
 
        /* Do pre- and post-relocation init */
        board_init_f(0);