+ /* use last 4K of mapped memory */
+ bootpg = ((gd->ram_size > CONFIG_MAX_MEM_MAPPED) ?
+ CONFIG_MAX_MEM_MAPPED : gd->ram_size) +
+ CONFIG_SYS_SDRAM_BASE - 4096;
+ if (pagesize)
+ *pagesize = 4096;
+
+#ifdef CONFIG_SYS_FSL_ERRATUM_A004468
+/*
+ * Erratum A004468 has two parts. The 3-way interleaving applies to T4240,
+ * to be fixed in rev 2.0. The 2-way interleaving applies to many SoCs. But
+ * the way boot page chosen in u-boot avoids hitting this erratum. So only
+ * thw workaround for 3-way interleaving is needed.
+ *
+ * To make sure boot page translation works with 3-Way DDR interleaving
+ * enforce a check for the following constrains
+ * 8K granule size requires BRSIZE=8K and
+ * bootpg >> log2(BRSIZE) %3 == 1
+ * 4K and 1K granule size requires BRSIZE=4K and
+ * bootpg >> log2(BRSIZE) %3 == 0
+ */
+ if (SVR_SOC_VER(svr) == SVR_T4240 && SVR_MAJ(svr) < 2) {
+ e = find_law(bootpg);
+ switch (e.trgt_id) {
+ case LAW_TRGT_IF_DDR_INTLV_123:
+ granule_size = fsl_ddr_get_intl3r() & 0x1f;
+ if (granule_size == FSL_DDR_3WAY_8KB_INTERLEAVING) {
+ if (pagesize)
+ *pagesize = 8192;
+ bootpg &= 0xffffe000; /* align to 8KB */
+ check = bootpg >> 13;
+ while ((check % 3) != 1)
+ check--;
+ bootpg = check << 13;
+ debug("Boot page (8K) at 0x%08x\n", bootpg);
+ break;
+ } else {
+ bootpg &= 0xfffff000; /* align to 4KB */
+ check = bootpg >> 12;
+ while ((check % 3) != 0)
+ check--;
+ bootpg = check << 12;
+ debug("Boot page (4K) at 0x%08x\n", bootpg);
+ }
+ break;
+ default:
+ break;
+ }
+ }
+#endif /* CONFIG_SYS_FSL_ERRATUM_A004468 */