merged tx6dl-devel into denx master branch

[karo-tx-uboot.git] / arch / arm / lib / crt0.S

diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 37d9927d2ca329f11b929a3e7ca6f2cf87cca106..7cfc52d6c2653f0a5d8699e3b4ddb2ce329f5142 100644 (file)
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -3,27 +3,12 @@
  *
  *  Copyright (c) 2012  Albert ARIBAUD <albert.u.boot@aribaud.net>
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <config.h>
 #include <asm-offsets.h>
+#include <linux/linkage.h>
 
 /*
  * This file handles the target-independent stages of the U-Boot
@@ -63,49 +48,23 @@
  *    have some work left to do at this point regarding memory, so
  *    call c_runtime_cpu_setup.
  *
- * 6. Branch to either nand_boot() or board_init_r().
- */
-
-/*
- * declare nand_boot() or board_init_r() to jump to at end of crt0
- */
-
-#if defined(CONFIG_NAND_SPL)
-
-.globl nand_boot
-
-#elif ! defined(CONFIG_SPL_BUILD)
-
-.globl board_init_r
-
-#endif
-
-/*
- * start and end of BSS
+ * 6. Branch to board_init_r().
  */
 
-.globl __bss_start
-.globl __bss_end
-
 /*
  * entry point of crt0 sequence
  */
 
-.global _main
-
-_main:
+ENTRY(_main)
 
 /*
  * Set up initial C runtime environment and call board_init_f(0).
  */
 
-#if defined(CONFIG_NAND_SPL)
-       /* deprecated, use instead CONFIG_SPL_BUILD */
-       ldr     sp, =(CONFIG_SYS_INIT_SP_ADDR)
-#elif defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK)
-       ldr     sp, =(CONFIG_SPL_STACK)
+#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK)
+       ldr     sp, =CONFIG_SPL_STACK
 #else
-       ldr     sp, =(CONFIG_SYS_INIT_SP_ADDR)
+       ldr     sp, =CONFIG_SYS_INIT_SP_ADDR
 #endif
        bic     sp, sp, #7      /* 8-byte alignment for ABI compliance */
        sub     sp, #GD_SIZE    /* allocate one GD above SP */
@@ -118,21 +77,19 @@ _main:
 
 /*
  * Set up intermediate environment (new sp and gd) and call
- * relocate_code(addr_sp, gd, addr_moni). Trick here is that
- * we'll return 'here' but relocated.
+ * relocate_code(addr_moni). Trick here is that we'll return
+ * 'here' but relocated.
  */
 
-       ldr     sp, [r8, #GD_START_ADDR_SP]     /* r8 = gd->start_addr_sp */
+       ldr     sp, [r8, #GD_START_ADDR_SP]     /* sp = gd->start_addr_sp */
        bic     sp, sp, #7      /* 8-byte alignment for ABI compliance */
        ldr     r8, [r8, #GD_BD]                /* r8 = gd->bd */
        sub     r8, r8, #GD_SIZE                /* new GD is below bd */
 
        adr     lr, here
-       ldr     r0, [r8, #GD_RELOC_OFF]         /* lr = gd->start_addr_sp */
+       ldr     r0, [r8, #GD_RELOC_OFF]         /* r0 = gd->reloc_off */
        add     lr, lr, r0
-       ldr     r0, [r8, #GD_START_ADDR_SP]     /* r0 = gd->start_addr_sp */
-       mov     r1, r8                          /* r1 = gd */
-       ldr     r2, [r8, #GD_RELOCADDR]         /* r2 = gd->relocaddr */
+       ldr     r0, [r8, #GD_RELOCADDR]         /* r0 = gd->relocaddr */
        b       relocate_code
 here:
 
@@ -153,21 +110,14 @@ clbss_l:cmp       r0, r1                  /* while not at end of BSS */
        bl coloured_LED_init
        bl red_led_on
 
-#if defined(CONFIG_NAND_SPL)
-
-       /* call _nand_boot() */
-       ldr     pc, =nand_boot
-
-#else
-
        /* call board_init_r(gd_t *id, ulong dest_addr) */
        mov     r0, r8                  /* gd_t */
        ldr     r1, [r8, #GD_RELOCADDR] /* dest_addr */
        /* call board_init_r */
        ldr     pc, =board_init_r       /* this is auto-relocated! */
 
-#endif
-
        /* we should not return here. */
 
 #endif
+
+ENDPROC(_main)