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Diffstat (limited to 'arch/powerpc/cpu/mpc8xxx/ddr/options.c')
-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/options.c107
1 files changed, 89 insertions, 18 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/options.c b/arch/powerpc/cpu/mpc8xxx/ddr/options.c
index 11281b7de8..ebbdb69c0d 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/options.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/options.c
@@ -212,10 +212,9 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
* Please refer to doc/README.fsl-ddr for the detail.
*
* If memory controller interleaving is enabled, then the data
- * bus widths must be programmed identically for the 2 memory
- * controllers.
+ * bus widths must be programmed identically for all memory controllers.
*
- * XXX: Attempt to set both controllers to the same chip select
+ * XXX: Attempt to set all controllers to the same chip select
* interleaving mode. It will do a best effort to get the
* requested ranks interleaved together such that the result
* should be a subset of the requested configuration.
@@ -223,15 +222,17 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
#if (CONFIG_NUM_DDR_CONTROLLERS > 1)
if (hwconfig_sub("fsl_ddr", "ctlr_intlv")) {
if (pdimm[0].n_ranks == 0) {
- printf("There is no rank on CS0. Because only rank on "
- "CS0 and ranks chip-select interleaved with CS0"
+ printf("There is no rank on CS0 for controller %d. Because only"
+ " rank on CS0 and ranks chip-select interleaved with CS0"
" are controller interleaved, force non memory "
- "controller interleaving\n");
+ "controller interleaving\n", ctrl_num);
popts->memctl_interleaving = 0;
} else {
popts->memctl_interleaving = 1;
- /* test null first. if CONFIG_HWCONFIG is not defined
- * hwconfig_arg_cmp returns non-zero */
+ /*
+ * test null first. if CONFIG_HWCONFIG is not defined
+ * hwconfig_arg_cmp returns non-zero
+ */
if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "null")) {
popts->memctl_interleaving = 0;
debug("memory controller interleaving disabled.\n");
@@ -254,13 +255,12 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
}
}
#endif
-
if ((hwconfig_sub("fsl_ddr", "bank_intlv")) &&
(CONFIG_CHIP_SELECTS_PER_CTRL > 1)) {
/* test null first. if CONFIG_HWCONFIG is not defined,
* hwconfig_arg_cmp returns non-zero */
if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "null"))
- printf("bank interleaving disabled.\n");
+ debug("bank interleaving disabled.\n");
else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs0_cs1"))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1;
else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs2_cs3"))
@@ -270,30 +270,70 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs0_cs1_cs2_cs3"))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3;
else
- printf("hwconfig has unrecognized parameter for ba_intlv_ctl.\n");
-
+ printf("hwconfig has unrecognized parameter for bank_intlv.\n");
switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
case FSL_DDR_CS0_CS1_CS2_CS3:
+#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
+ if (pdimm[0].n_ranks != 4) {
+ popts->ba_intlv_ctl = 0;
+ printf("Not enough bank(chip-select) for "
+ "CS0+CS1+CS2+CS3 on controller %d, "
+ "force non-interleaving!\n", ctrl_num);
+ }
+#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+ if ((pdimm[0].n_ranks != 2) && (pdimm[1].n_ranks != 2)) {
+ popts->ba_intlv_ctl = 0;
+ printf("Not enough bank(chip-select) for "
+ "CS0+CS1+CS2+CS3 on controller %d, "
+ "force non-interleaving!\n", ctrl_num);
+ }
+ if (pdimm[0].capacity != pdimm[1].capacity) {
+ popts->ba_intlv_ctl = 0;
+ printf("Not identical DIMM size for "
+ "CS0+CS1+CS2+CS3 on controller %d, "
+ "force non-interleaving!\n", ctrl_num);
+ }
+#endif
+ break;
case FSL_DDR_CS0_CS1:
if (pdimm[0].n_ranks != 2) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for "
- "CS0+CS1, force non-interleaving!\n");
+ "CS0+CS1 on controller %d, "
+ "force non-interleaving!\n", ctrl_num);
}
break;
case FSL_DDR_CS2_CS3:
- if (pdimm[1].n_ranks !=2){
+#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
+ if (pdimm[0].n_ranks != 4) {
+ popts->ba_intlv_ctl = 0;
+ printf("Not enough bank(chip-select) for CS2+CS3 "
+ "on controller %d, force non-interleaving!\n", ctrl_num);
+ }
+#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+ if (pdimm[1].n_ranks != 2) {
popts->ba_intlv_ctl = 0;
- printf("Not enough bank(CS) for CS2+CS3, "
- "force non-interleaving!\n");
+ printf("Not enough bank(chip-select) for CS2+CS3 "
+ "on controller %d, force non-interleaving!\n", ctrl_num);
}
+#endif
break;
case FSL_DDR_CS0_CS1_AND_CS2_CS3:
+#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
+ if (pdimm[0].n_ranks != 4) {
+ popts->ba_intlv_ctl = 0;
+ printf("Not enough bank(CS) for CS0+CS1 and "
+ "CS2+CS3 on controller %d, "
+ "force non-interleaving!\n", ctrl_num);
+ }
+#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
if ((pdimm[0].n_ranks != 2)||(pdimm[1].n_ranks != 2)) {
popts->ba_intlv_ctl = 0;
- printf("Not enough bank(CS) for CS0+CS1 or "
- "CS2+CS3, force non-interleaving!\n");
+ printf("Not enough bank(CS) for CS0+CS1 and "
+ "CS2+CS3 on controller %d, "
+ "force non-interleaving!\n", ctrl_num);
}
+#endif
break;
default:
popts->ba_intlv_ctl = 0;
@@ -305,3 +345,34 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
return 0;
}
+
+void check_interleaving_options(fsl_ddr_info_t *pinfo)
+{
+ int i, j, check_n_ranks, intlv_fixed = 0;
+ unsigned long long check_rank_density;
+ /*
+ * Check if all controllers are configured for memory
+ * controller interleaving. Identical dimms are recommended. At least
+ * the size should be checked.
+ */
+ j = 0;
+ check_n_ranks = pinfo->dimm_params[0][0].n_ranks;
+ check_rank_density = pinfo->dimm_params[0][0].rank_density;
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ if ((pinfo->memctl_opts[i].memctl_interleaving) && \
+ (check_rank_density == pinfo->dimm_params[i][0].rank_density) && \
+ (check_n_ranks == pinfo->dimm_params[i][0].n_ranks)) {
+ j++;
+ }
+ }
+ if (j != CONFIG_NUM_DDR_CONTROLLERS) {
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++)
+ if (pinfo->memctl_opts[i].memctl_interleaving) {
+ pinfo->memctl_opts[i].memctl_interleaving = 0;
+ intlv_fixed = 1;
+ }
+ if (intlv_fixed)
+ printf("Not all DIMMs are identical in size. "
+ "Memory controller interleaving disabled.\n");
+ }
+}
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