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authorStefan Roese <sr@denx.de>2007-03-16 21:11:42 +0100
committerStefan Roese <sr@denx.de>2007-03-16 21:11:42 +0100
commit8423e5e31a7235d05a482627315fb11d49c17bd7 (patch)
tree08fc66617e2f9369cf677f5f9c098aa081064de5 /board/amcc/ebony
parent76d1466f918b881cda2d259254761e73885093c2 (diff)
downloadu-boot-linaro-stable-8423e5e31a7235d05a482627315fb11d49c17bd7.tar.gz
[PATCH] Use dynamic SDRAM TLB setup on AMCC Ebony eval board
Define CONFIG_PROG_SDRAM_TLB so that the TLB entries for the DDR memory are dynamically programmed matching the total size of the equipped memory (DIMM modules). Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'board/amcc/ebony')
-rw-r--r--board/amcc/ebony/init.S77
1 files changed, 19 insertions, 58 deletions
diff --git a/board/amcc/ebony/init.S b/board/amcc/ebony/init.S
index cc8f8b444..c86076e80 100644
--- a/board/amcc/ebony/init.S
+++ b/board/amcc/ebony/init.S
@@ -22,53 +22,7 @@
#include <ppc_asm.tmpl>
#include <config.h>
-
-/* General */
-#define TLB_VALID 0x00000200
-
-/* Supported page sizes */
-
-#define SZ_1K 0x00000000
-#define SZ_4K 0x00000010
-#define SZ_16K 0x00000020
-#define SZ_64K 0x00000030
-#define SZ_256K 0x00000040
-#define SZ_1M 0x00000050
-#define SZ_16M 0x00000070
-#define SZ_256M 0x00000090
-
-/* Storage attributes */
-#define SA_W 0x00000800 /* Write-through */
-#define SA_I 0x00000400 /* Caching inhibited */
-#define SA_M 0x00000200 /* Memory coherence */
-#define SA_G 0x00000100 /* Guarded */
-#define SA_E 0x00000080 /* Endian */
-
-/* Access control */
-#define AC_X 0x00000024 /* Execute */
-#define AC_W 0x00000012 /* Write */
-#define AC_R 0x00000009 /* Read */
-
-/* Some handy macros */
-
-#define EPN(e) ((e) & 0xfffffc00)
-#define TLB0(epn,sz) ( (EPN((epn)) | (sz) | TLB_VALID ) )
-#define TLB1(rpn,erpn) ( ((rpn)&0xfffffc00) | (erpn) )
-#define TLB2(a) ( (a)&0x00000fbf )
-
-#define tlbtab_start\
- mflr r1 ;\
- bl 0f ;
-
-#define tlbtab_end\
- .long 0, 0, 0 ; \
-0: mflr r0 ; \
- mtlr r1 ; \
- blr ;
-
-#define tlbentry(epn,sz,rpn,erpn,attr)\
- .long TLB0(epn,sz),TLB1(rpn,erpn),TLB2(attr)
-
+#include <asm-ppc/mmu.h>
/**************************************************************************
* TLB TABLE
@@ -81,16 +35,23 @@
*
*************************************************************************/
- .section .bootpg,"ax"
- .globl tlbtab
+ .section .bootpg,"ax"
+ .globl tlbtab
tlbtab:
- tlbtab_start
- tlbentry( 0xf0000000, SZ_256M, 0xf0000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I)
- tlbentry( CFG_PERIPHERAL_BASE, SZ_256M, 0x40000000, 1, AC_R|AC_W|SA_G|SA_I)
- tlbentry( CFG_ISRAM_BASE, SZ_4K, 0x80000000, 0, AC_R|AC_W|AC_X )
- tlbentry( CFG_ISRAM_BASE + 0x1000, SZ_4K, 0x80001000, 0, AC_R|AC_W|AC_X )
- tlbentry( CFG_SDRAM_BASE, SZ_256M, 0x00000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
- tlbentry( CFG_PCI_BASE, SZ_256M, 0x00000000, 2, AC_R|AC_W|SA_G|SA_I )
- tlbentry( CFG_PCI_MEMBASE, SZ_256M, 0x00000000, 3, AC_R|AC_W|SA_G|SA_I )
- tlbtab_end
+ tlbtab_start
+
+ tlbentry(0xf0000000, SZ_256M, 0xf0000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I)
+
+ /*
+ * TLB entries for SDRAM are not needed on this platform.
+ * They are dynamically generated in the SPD DDR(2) detection
+ * routine.
+ */
+
+ tlbentry(CFG_PERIPHERAL_BASE, SZ_256M, 0x40000000, 1, AC_R|AC_W|SA_G|SA_I)
+ tlbentry(CFG_ISRAM_BASE, SZ_4K, 0x80000000, 0, AC_R|AC_W|AC_X)
+ tlbentry(CFG_ISRAM_BASE + 0x1000, SZ_4K, 0x80001000, 0, AC_R|AC_W|AC_X)
+ tlbentry(CFG_PCI_BASE, SZ_256M, 0x00000000, 2, AC_R|AC_W|SA_G|SA_I)
+ tlbentry(CFG_PCI_MEMBASE, SZ_256M, 0x00000000, 3, AC_R|AC_W|SA_G|SA_I)
+ tlbtab_end