ppc4xx: Add SDRAM detection for PMC440 boards
This patch adds support to detect the amount of DDR2 SDRAM
on PMC440 modules. Detection is done by probing through
a list of available and supported hardware configurations
from 1GByte down to 256MB.
The static TLB entry is replaced by dynamically created entries.
Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/esd/pmc440/init.S b/board/esd/pmc440/init.S
index 26a8282..6585fed 100644
--- a/board/esd/pmc440/init.S
+++ b/board/esd/pmc440/init.S
@@ -23,7 +23,7 @@
#include <asm-ppc/mmu.h>
#include <config.h>
-/**************************************************************************
+/*
* TLB TABLE
*
* This table is used by the cpu boot code to setup the initial tlb
@@ -32,7 +32,7 @@
*
* Pointer to the table is returned in r1
*
- *************************************************************************/
+ */
.section .bootpg,"ax"
.globl tlbtab
@@ -49,12 +49,7 @@
tlbentry( CONFIG_SYS_NAND_BOOT_SPL_SRC, SZ_4K, CONFIG_SYS_NAND_BOOT_SPL_SRC, 1, AC_R|AC_W|AC_X|SA_G )
#endif
- /* TLB-entry for DDR SDRAM (Up to 2GB) */
-#ifdef CONFIG_4xx_DCACHE
- tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G)
-#else
- tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
-#endif
+ /* TLB entries for DDR2 SDRAM are generated dynamically */
#ifdef CONFIG_SYS_INIT_RAM_DCACHE
/* TLB-entry for init-ram in dcache (SA_I must be turned off!) */