board/tqm85xx: Create and tear down TLB for get_ram_size()
We need a TLB entry to call get_ram_size(); the common code doesn't create
one until *after* fixed_sdram() has determined the size. So we set up tlbs
for the max possible size and tear them down once we're done with
get_ram_size(); the common 85xx code will then set up a final set of tlb
entries for the *actual* detected size of ddr.
This prevents us from having TLB entries that are larger than DDR sitting
around for very long, which is not a recommended scenario.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/TQM85xx.h b/include/configs/TQM85xx.h
index 79a958d..b336723 100644
--- a/include/configs/TQM85xx.h
+++ b/include/configs/TQM85xx.h
@@ -147,10 +147,16 @@
* DDR Setup
*/
#define CONFIG_SYS_DDR_SDRAM_BASE 0x00000000 /* DDR is system memory */
+
#if defined(CONFIG_TQM_BIGFLASH) || \
(!defined(CONFIG_TQM8548_AG) && !defined(CONFIG_TQM8548_BE))
#define CONFIG_SYS_PPC_DDR_WIMGE (MAS2_I | MAS2_G)
+#define CONFIG_SYS_DDR_EARLY_SIZE_MB (512)
+#else
+#define CONFIG_SYS_PPC_DDR_WIMGE (0)
+#define CONFIG_SYS_DDR_EARLY_SIZE_MB (2 * 1024)
#endif
+
#define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_SDRAM_BASE
#ifdef CONFIG_TQM8548_AG
#define CONFIG_VERY_BIG_RAM