Merge branch 'u-boot-imx/master' into 'u-boot-arm/master'

[karo-tx-uboot.git] / arch / mips / cpu / mips32 / start.S

diff --git a/arch/mips/cpu/mips32/start.S b/arch/mips/cpu/mips32/start.S
index 7373d4edc42f0c424ee147fe6813a6e4076d5b47..68e59b596f1146f605a91383c7dd950945fddc2f 100644 (file)
--- a/arch/mips/cpu/mips32/start.S
+++ b/arch/mips/cpu/mips32/start.S
@@ -3,23 +3,7 @@
  *
  *  Copyright (c) 2003 Wolfgang Denk <wd@denx.de>
  *
- * 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 <asm-offsets.h>
@@ -57,7 +41,7 @@ _start:
         nop
 
        .org 0x10
-#ifdef CONFIG_SYS_XWAY_EBU_BOOTCFG
+#if defined(CONFIG_SYS_XWAY_EBU_BOOTCFG)
        /*
         * Almost all Lantiq XWAY SoC devices have an external bus unit (EBU) to
         * access external NOR flashes. If the board boots from NOR flash the
@@ -67,6 +51,12 @@ _start:
         */
        .word CONFIG_SYS_XWAY_EBU_BOOTCFG
        .word 0x0
+#elif defined(CONFIG_MALTA)
+       /*
+        * Linux expects the Board ID here.
+        */
+       .word 0x00000420        # 0x420 (Malta Board with CoreLV)
+       .word 0x00000000
 #endif
 
        .org 0x200
@@ -173,7 +163,7 @@ relocate_code:
        sub     s1, s2, t0              # s1 <-- relocation offset
 
        la      t3, in_ram
-       lw      t2, -12(t3)             # t2 <-- uboot_end_data
+       lw      t2, -12(t3)             # t2 <-- __image_copy_end
        move    t1, a2
 
        add     gp, s1                  # adjust gp
@@ -201,9 +191,10 @@ relocate_code:
        jr      t0
         nop
 
+       .word   __rel_dyn_end
+       .word   __rel_dyn_start
+       .word   __image_copy_end
        .word   _GLOBAL_OFFSET_TABLE_
-       .word   uboot_end_data
-       .word   uboot_end
        .word   num_got_entries
 
 in_ram:
@@ -214,31 +205,59 @@ in_ram:
         * generated by GNU ld. Skip these reserved entries from relocation.
         */
        lw      t3, -4(t0)              # t3 <-- num_got_entries
-       lw      t4, -16(t0)             # t4 <-- _GLOBAL_OFFSET_TABLE_
-       add     t4, s1                  # t4 now holds relocated _G_O_T_
-       addi    t4, t4, 8               # skipping first two entries
+       lw      t8, -8(t0)              # t8 <-- _GLOBAL_OFFSET_TABLE_
+       add     t8, s1                  # t8 now holds relocated _G_O_T_
+       addi    t8, t8, 8               # skipping first two entries
        li      t2, 2
 1:
-       lw      t1, 0(t4)
+       lw      t1, 0(t8)
        beqz    t1, 2f
         add    t1, s1
-       sw      t1, 0(t4)
+       sw      t1, 0(t8)
 2:
        addi    t2, 1
        blt     t2, t3, 1b
-        addi   t4, 4
+        addi   t8, 4
 
-       /* Clear BSS */
-       lw      t1, -12(t0)             # t1 <-- uboot_end_data
-       lw      t2, -8(t0)              # t2 <-- uboot_end
-       add     t1, s1                  # adjust pointers
-       add     t2, s1
+       /* Update dynamic relocations */
+       lw      t1, -16(t0)             # t1 <-- __rel_dyn_start
+       lw      t2, -20(t0)             # t2 <-- __rel_dyn_end
+
+       b       2f                      # skip first reserved entry
+        addi   t1, 8
+
+1:
+       lw      t8, -4(t1)              # t8 <-- relocation info
+
+       li      t3, 3
+       bne     t8, t3, 2f              # skip non R_MIPS_REL32 entries
+        nop
+
+       lw      t3, -8(t1)              # t3 <-- location to fix up in FLASH
+
+       lw      t8, 0(t3)               # t8 <-- original pointer
+       add     t8, s1                  # t8 <-- adjusted pointer
+
+       add     t3, s1                  # t3 <-- location to fix up in RAM
+       sw      t8, 0(t3)
+
+2:
+       blt     t1, t2, 1b
+        addi   t1, 8                   # each rel.dyn entry is 8 bytes
+
+       /*
+        * Clear BSS
+        *
+        * GOT is now relocated. Thus __bss_start and __bss_end can be
+        * accessed directly via $gp.
+        */
+       la      t1, __bss_start         # t1 <-- __bss_start
+       la      t2, __bss_end           # t2 <-- __bss_end
 
-       sub     t1, 4
 1:
-       addi    t1, 4
-       bltl    t1, t2, 1b
-        sw     zero, 0(t1)
+       sw      zero, 0(t1)
+       blt     t1, t2, 1b
+        addi   t1, 4
 
        move    a0, s0                  # a0 <-- gd
        la      t9, board_init_r