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-rw-r--r--board/amcc/ocotea/init.S82
-rw-r--r--cpu/ppc4xx/44x_spd_ddr.c31
-rw-r--r--include/configs/ocotea.h3
3 files changed, 48 insertions, 68 deletions
diff --git a/board/amcc/ocotea/init.S b/board/amcc/ocotea/init.S
index 7e0b132..d211c71 100644
--- a/board/amcc/ocotea/init.S
+++ b/board/amcc/ocotea/init.S
@@ -22,55 +22,7 @@
#include <ppc_asm.tmpl>
#include <config.h>
-
-/* General */
-#define TLB_VALID 0x00000200
-#define _256M 0x10000000
-
-/* 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_8M 0x00000060
-#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
@@ -83,19 +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_SDRAM_BASE + 0x10000000, SZ_256M, 0x10000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
- tlbentry( CFG_SDRAM_BASE + 0x20000000, SZ_256M, 0x20000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
- tlbentry( CFG_SDRAM_BASE + 0x30000000, SZ_256M, 0x30000000, 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
diff --git a/cpu/ppc4xx/44x_spd_ddr.c b/cpu/ppc4xx/44x_spd_ddr.c
index 32d44db..10b4c18 100644
--- a/cpu/ppc4xx/44x_spd_ddr.c
+++ b/cpu/ppc4xx/44x_spd_ddr.c
@@ -46,6 +46,7 @@
#include <asm/processor.h>
#include <i2c.h>
#include <ppc4xx.h>
+#include <asm/mmu.h>
#if defined(CONFIG_SPD_EEPROM) && \
(defined(CONFIG_440GP) || defined(CONFIG_440GX) || \
@@ -229,6 +230,22 @@
#define TRUE 1
#define FALSE 0
+/*
+ * This DDR2 setup code can dynamically setup the TLB entries for the DDR2 memory
+ * region. Right now the cache should still be disabled in U-Boot because of the
+ * EMAC driver, that need it's buffer descriptor to be located in non cached
+ * memory.
+ *
+ * If at some time this restriction doesn't apply anymore, just define
+ * CFG_ENABLE_SDRAM_CACHE in the board config file and this code should setup
+ * everything correctly.
+ */
+#ifdef CFG_ENABLE_SDRAM_CACHE
+#define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on SDRAM */
+#else
+#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on SDRAM */
+#endif
+
const unsigned long test[NUMMEMTESTS][NUMMEMWORDS] = {
{0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000,
0xFFFFFFFF, 0xFFFFFFFF},
@@ -259,6 +276,7 @@ typedef struct bank_param BANKPARMS;
#ifdef CFG_SIMULATE_SPD_EEPROM
extern unsigned char cfg_simulate_spd_eeprom[128];
#endif
+void program_tlb(u32 start, u32 size, u32 tlb_word2_i_value);
unsigned char spd_read(uchar chip, uint addr);
@@ -377,6 +395,11 @@ long int spd_sdram(void) {
total_size = program_bxcr(dimm_populated, iic0_dimm_addr,
num_dimm_banks);
+#ifdef CONFIG_PROG_SDRAM_TLB /* this define should eventually be removed */
+ /* and program tlb entries for this size (dynamic) */
+ program_tlb(0, total_size, MY_TLB_WORD2_I_ENABLE);
+#endif
+
/*
* program SDRAM Clock Timing Register (SDRAM0_CLKTR)
*/
@@ -1330,11 +1353,11 @@ unsigned long program_bxcr(unsigned long* dimm_populated,
*/
cr |= SDRAM_BXCR_SDBE;
- for (i = 0; i < num_banks; i++) {
- bank_parms[ctrl_bank_num[dimm_num]+i].bank_size_bytes =
+ for (i = 0; i < num_banks; i++) {
+ bank_parms[ctrl_bank_num[dimm_num]+i+dimm_num].bank_size_bytes =
(4 * 1024 * 1024) * bank_size_id;
- bank_parms[ctrl_bank_num[dimm_num]+i].cr = cr;
- }
+ bank_parms[ctrl_bank_num[dimm_num]+i+dimm_num].cr = cr;
+ }
}
}
diff --git a/include/configs/ocotea.h b/include/configs/ocotea.h
index 0e3660b..fe4e638 100644
--- a/include/configs/ocotea.h
+++ b/include/configs/ocotea.h
@@ -148,8 +148,9 @@
/*-----------------------------------------------------------------------
* DDR SDRAM
*----------------------------------------------------------------------*/
-#define CONFIG_SPD_EEPROM 1 /* Use SPD EEPROM for setup */
+#define CONFIG_SPD_EEPROM 1 /* Use SPD EEPROM for setup */
#define SPD_EEPROM_ADDRESS {0x53,0x52} /* SPD i2c spd addresses */
+#define CONFIG_PROG_SDRAM_TLB 1 /* setup SDRAM TLB's dynamically*/
/*-----------------------------------------------------------------------
* I2C