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-rw-r--r--cpu/ppc4xx/44x_spd_ddr.c31
1 files changed, 27 insertions, 4 deletions
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;
+ }
}
}