arm: mx5: Avoid hardcoding memory sizes on MX53QSB

[karo-tx-uboot.git] / board / freescale / mx53loco / mx53loco.c

diff --git a/board/freescale/mx53loco/mx53loco.c b/board/freescale/mx53loco/mx53loco.c
index 08dd66fcc6414d8bd7afceb9244861858da34d06..b32a97ff1a58f17fac30dfd51f3a616b083bad93 100644 (file)
--- a/board/freescale/mx53loco/mx53loco.c
+++ b/board/freescale/mx53loco/mx53loco.c
@@ -30,24 +30,41 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-int dram_init(void)
+static uint32_t mx53_dram_size[2];
+
+phys_size_t get_effective_memsize(void)
 {
-       u32 size1, size2;
+       /*
+        * WARNING: We must override get_effective_memsize() function here
+        * to report only the size of the first DRAM bank. This is to make
+        * U-Boot relocator place U-Boot into valid memory, that is, at the
+        * end of the first DRAM bank. If we did not override this function
+        * like so, U-Boot would be placed at the address of the first DRAM
+        * bank + total DRAM size - sizeof(uboot), which in the setup where
+        * each DRAM bank contains 512MiB of DRAM would result in placing
+        * U-Boot into invalid memory area close to the end of the first
+        * DRAM bank.
+        */
+       return mx53_dram_size[0];
+}
 
-       size1 = get_ram_size((void *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
-       size2 = get_ram_size((void *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
+int dram_init(void)
+{
+       mx53_dram_size[0] = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
+       mx53_dram_size[1] = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
 
-       gd->ram_size = size1 + size2;
+       gd->ram_size = mx53_dram_size[0] + mx53_dram_size[1];
 
        return 0;
 }
+
 void dram_init_banksize(void)
 {
        gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-       gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+       gd->bd->bi_dram[0].size = mx53_dram_size[0];
 
        gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
-       gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
+       gd->bd->bi_dram[1].size = mx53_dram_size[1];
 }
 
 u32 get_board_rev(void)