arm: Switch 32-bit ARM to using generic global_data setup

There is quite a bit of assembler code that can be removed if we use the
generic global_data setup. Less arch-specific code makes it easier to add
new features and maintain the start-up code.

Drop the unneeded code and adjust the hooks in board_f.c to cope.

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

diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 4c3a94a..80548eb 100644 (file)
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -82,31 +82,11 @@ ENTRY(_main)
 #else
        bic     sp, sp, #7      /* 8-byte alignment for ABI compliance */
 #endif
-       mov     r2, sp
-       sub     sp, sp, #GD_SIZE        /* allocate one GD above SP */
-#if defined(CONFIG_CPU_V7M)    /* v7M forbids using SP as BIC destination */
-       mov     r3, sp
-       bic     r3, r3, #7
-       mov     sp, r3
-#else
-       bic     sp, sp, #7      /* 8-byte alignment for ABI compliance */
-#endif
-       mov     r9, sp          /* GD is above SP */
-       mov     r1, sp
+       mov     r0, sp
+       bl      board_init_f_mem
+       mov     sp, r0
+
        mov     r0, #0
-clr_gd:
-       cmp     r1, r2                  /* while not at end of GD */
-#if defined(CONFIG_CPU_V7M)
-       itt     lo
-#endif
-       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)
-       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
 
 #if ! defined(CONFIG_SPL_BUILD)