MIPS: add support for pre-relocation malloc

[u-boot] / arch / mips / cpu / mips64 / start.S

diff --git a/arch/mips/cpu/mips64/start.S b/arch/mips/cpu/mips64/start.S
index 81df923bc349831f58d885e240dae5374ee97e0e..471bc1eb663b52a335732732d396e75c6e1ddfc0 100644 (file)
--- a/arch/mips/cpu/mips64/start.S
+++ b/arch/mips/cpu/mips64/start.S
@@ -134,9 +134,31 @@ reset:
 #endif
 
        /* Set up temporary stack */
-       dli     sp, CONFIG_SYS_INIT_SP_ADDR
+       dli     t0, -16
+       dli     t1, CONFIG_SYS_INIT_SP_ADDR
+       and     sp, t1, t0              # force 16 byte alignment
+       dsub    sp, sp, GD_SIZE         # reserve space for gd
+       and     sp, sp, t0              # force 16 byte alignment
+       move    k0, sp                  # save gd pointer
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+       dli     t2, CONFIG_SYS_MALLOC_F_LEN
+       dsub    sp, sp, t2              # reserve space for early malloc
+       and     sp, sp, t0              # force 16 byte alignment
+#endif
        move    fp, sp
 
+       /* Clear gd */
+       move    t0, k0
+1:
+       sw      zero, 0(t0)
+       blt     t0, t1, 1b
+        daddi  t0, 4
+
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+       daddu   t0, k0, GD_MALLOC_BASE  # gd->malloc_base offset
+       sw      sp, 0(t0)
+#endif
+
        dla     t9, board_init_f
        jr      t9
         move   ra, zero