mpc83xx: Rename CONFIG_SYS_DDR_CONFIG and cleanup DDR csbnds code

[karo-tx-uboot.git] / board / sbc8349 / sbc8349.c

diff --git a/board/sbc8349/sbc8349.c b/board/sbc8349/sbc8349.c
index 50fae7c367382d6aa9e14ce044d1bb3d82175bda..42f4c1ef06774506a204641e6869c689dbcb4173 100644 (file)
--- a/board/sbc8349/sbc8349.c
+++ b/board/sbc8349/sbc8349.c
@@ -89,26 +89,25 @@ phys_size_t initdram (int board_type)
 int fixed_sdram(void)
 {
        volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
-       u32 msize = 0;
-       u32 ddr_size;
-       u32 ddr_size_log2;
-
-       msize = CONFIG_SYS_DDR_SIZE;
-       for (ddr_size = msize << 20, ddr_size_log2 = 0;
-            (ddr_size > 1);
-            ddr_size = ddr_size>>1, ddr_size_log2++) {
-               if (ddr_size & 1) {
-                       return -1;
-               }
-       }
+       u32 msize = CONFIG_SYS_DDR_SIZE;
+       u32 ddr_size = msize << 20;     /* DDR size in bytes */
+       u32 ddr_size_log2 = __ilog2(msize);
+
        im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000;
        im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
 
 #if (CONFIG_SYS_DDR_SIZE != 256)
 #warning Currently any ddr size other than 256 is not supported
 #endif
-       im->ddr.csbnds[2].csbnds = 0x0000000f;
-       im->ddr.cs_config[2] = CONFIG_SYS_DDR_CONFIG;
+
+#if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0)
+#warning Chip select bounds is only configurable in 16MB increments
+#endif
+       im->ddr.csbnds[2].csbnds =
+               ((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
+               (((CONFIG_SYS_DDR_SDRAM_BASE + ddr_size - 1) >>
+                               CSBNDS_EA_SHIFT) & CSBNDS_EA);
+       im->ddr.cs_config[2] = CONFIG_SYS_DDR_CS2_CONFIG;
 
        /* currently we use only one CS, so disable the other banks */
        im->ddr.cs_config[0] = 0;