[U-Boot] [PATCH 2/8] powerpc/8xxx: Fix bug in memctrl interleaving & bank interleaving on cs0~cs4
Kumar Gala
galak at kernel.crashing.org
Wed Jul 14 17:14:56 CEST 2010
From: york <yorksun at freescale.com>
Verified on MPC8641HPCN with four DDR2 dimms. Each dimm has dual
rank with 512MB each rank.
Also check dimm size and rank size for memory controller interleaving
Signed-off-by: York Sun <yorksun at freescale.com>
---
arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c | 113 +++++++++++++++++++----------
arch/powerpc/cpu/mpc8xxx/ddr/ddr.h | 1 +
arch/powerpc/cpu/mpc8xxx/ddr/main.c | 40 +++++-----
arch/powerpc/cpu/mpc8xxx/ddr/options.c | 107 +++++++++++++++++++++++-----
board/freescale/mpc8641hpcn/mpc8641hpcn.c | 2 +
doc/README.fsl-ddr | 3 +
include/configs/MPC8641HPCN.h | 2 +
7 files changed, 191 insertions(+), 77 deletions(-)
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
index 4a282bc..69c1c7c 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
@@ -1201,20 +1201,28 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
/* Chip Select Memory Bounds (CSn_BNDS) */
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
unsigned long long ea = 0, sa = 0;
-
- if (popts->ba_intlv_ctl && (i > 0) &&
- ((popts->ba_intlv_ctl & 0x60) != FSL_DDR_CS2_CS3 )) {
- /* Don't set up boundaries for other CS
- * other than CS0, if bank interleaving
- * is enabled and not CS2+CS3 interleaved.
+ unsigned int cs_per_dimm
+ = CONFIG_CHIP_SELECTS_PER_CTRL / CONFIG_DIMM_SLOTS_PER_CTLR;
+ unsigned int dimm_number
+ = i / cs_per_dimm;
+ unsigned long long rank_density
+ = dimm_params[dimm_number].rank_density;
+
+ if (((i == 1) && (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1)) ||
+ ((i == 2) && (popts->ba_intlv_ctl & 0x04)) ||
+ ((i == 3) && (popts->ba_intlv_ctl & FSL_DDR_CS2_CS3))) {
+ /*
+ * Don't set up boundaries for unused CS
+ * cs1 for cs0_cs1, cs0_cs1_and_cs2_cs3, cs0_cs1_cs2_cs3
+ * cs2 for cs0_cs1_cs2_cs3
+ * cs3 for cs2_cs3, cs0_cs1_and_cs2_cs3, cs0_cs1_cs2_cs3
* But we need to set the ODT_RD_CFG and
* ODT_WR_CFG for CS1_CONFIG here.
*/
set_csn_config(i, ddr, popts, dimm_params);
- break;
+ continue;
}
-
- if (dimm_params[i/2].n_ranks == 0) {
+ if (dimm_params[dimm_number].n_ranks == 0) {
debug("Skipping setup of CS%u "
"because n_ranks on DIMM %u is 0\n", i, i/2);
continue;
@@ -1222,16 +1230,34 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
if (popts->memctl_interleaving && popts->ba_intlv_ctl) {
/*
* This works superbank 2CS
- * There are 2 memory controllers configured
+ * There are 2 or more memory controllers configured
* identically, memory is interleaved between them,
* and each controller uses rank interleaving within
* itself. Therefore the starting and ending address
* on each controller is twice the amount present on
* each controller.
*/
- unsigned long long rank_density
- = dimm_params[0].capacity;
- ea = (2 * (rank_density >> dbw_cap_adj)) - 1;
+ unsigned long long ctlr_density = 0;
+ switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
+ case FSL_DDR_CS0_CS1:
+ case FSL_DDR_CS0_CS1_AND_CS2_CS3:
+ ctlr_density = dimm_params[0].rank_density * 2;
+ break;
+ case FSL_DDR_CS2_CS3:
+ ctlr_density = dimm_params[0].rank_density;
+ break;
+ case FSL_DDR_CS0_CS1_CS2_CS3:
+ /*
+ * The four CS interleaving should have been verified by
+ * populate_memctl_options()
+ */
+ ctlr_density = dimm_params[0].rank_density * 4;
+ break;
+ default:
+ break;
+ }
+ ea = (CONFIG_NUM_DDR_CONTROLLERS *
+ (ctlr_density >> dbw_cap_adj)) - 1;
}
else if (!popts->memctl_interleaving && popts->ba_intlv_ctl) {
/*
@@ -1243,8 +1269,6 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
* controller needs to be programmed into its
* respective CS0_BNDS.
*/
- unsigned long long rank_density
- = dimm_params[i/2].rank_density;
switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
case FSL_DDR_CS0_CS1_CS2_CS3:
/* CS0+CS1+CS2+CS3 interleaving, only CS0_CNDS
@@ -1257,9 +1281,13 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
/* CS0+CS1 and CS2+CS3 interleaving, CS0_CNDS
* and CS2_CNDS need to be set.
*/
- if (!(i&1)) {
- sa = dimm_params[i/2].base_address;
- ea = sa + (i * (rank_density >>
+ if ((i == 2) && (dimm_number == 0)) {
+ sa = dimm_params[dimm_number].base_address +
+ 2 * (rank_density >> dbw_cap_adj);
+ ea = sa + 2 * (rank_density >> dbw_cap_adj) - 1;
+ } else {
+ sa = dimm_params[dimm_number].base_address;
+ ea = sa + (2 * (rank_density >>
dbw_cap_adj)) - 1;
}
break;
@@ -1267,16 +1295,31 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
/* CS0+CS1 interleaving, CS0_CNDS needs
* to be set
*/
- sa = common_dimm->base_address;
- ea = sa + (2 * (rank_density >> dbw_cap_adj))-1;
+ if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
+ sa = dimm_params[dimm_number].base_address;
+ ea = sa + (rank_density >> dbw_cap_adj) - 1;
+ sa += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj);
+ ea += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj);
+ } else {
+ sa = 0;
+ ea = 0;
+ }
+ if (i == 0)
+ ea += (rank_density >> dbw_cap_adj);
break;
case FSL_DDR_CS2_CS3:
/* CS2+CS3 interleaving*/
- if (i == 2) {
- sa = dimm_params[i/2].base_address;
- ea = sa + (2 * (rank_density >>
- dbw_cap_adj)) - 1;
+ if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
+ sa = dimm_params[dimm_number].base_address;
+ ea = sa + (rank_density >> dbw_cap_adj) - 1;
+ sa += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj);
+ ea += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj);
+ } else {
+ sa = 0;
+ ea = 0;
}
+ if (i == 2)
+ ea += (rank_density >> dbw_cap_adj);
break;
default: /* No bank(chip-select) interleaving */
break;
@@ -1292,8 +1335,6 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
* memory in the two CS0 ranks.
*/
if (i == 0) {
- unsigned long long rank_density
- = dimm_params[0].rank_density;
ea = (2 * (rank_density >> dbw_cap_adj)) - 1;
}
@@ -1303,20 +1344,14 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
* No rank interleaving and no memory controller
* interleaving.
*/
- unsigned long long rank_density
- = dimm_params[i/2].rank_density;
- sa = dimm_params[i/2].base_address;
+ sa = dimm_params[dimm_number].base_address;
ea = sa + (rank_density >> dbw_cap_adj) - 1;
- if (i&1) {
- if ((dimm_params[i/2].n_ranks == 1)) {
- /* Odd chip select, single-rank dimm */
- sa = 0;
- ea = 0;
- } else {
- /* Odd chip select, dual-rank DIMM */
- sa += rank_density >> dbw_cap_adj;
- ea += rank_density >> dbw_cap_adj;
- }
+ if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
+ sa += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj);
+ ea += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj);
+ } else {
+ sa = 0;
+ ea = 0;
}
}
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ddr.h b/arch/powerpc/cpu/mpc8xxx/ddr/ddr.h
index f122075..98acb8d 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/ddr.h
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/ddr.h
@@ -73,6 +73,7 @@ extern unsigned int populate_memctl_options(int all_DIMMs_registered,
memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num);
+extern void check_interleaving_options(fsl_ddr_info_t *pinfo);
extern unsigned int mclk_to_picos(unsigned int mclk);
extern unsigned int get_memory_clk_period_ps(void);
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/main.c b/arch/powerpc/cpu/mpc8xxx/ddr/main.c
index faa1af9..6d582e9 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/main.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/main.c
@@ -100,8 +100,8 @@ const char * step_to_string(unsigned int step) {
int step_assign_addresses(fsl_ddr_info_t *pinfo,
unsigned int dbw_cap_adj[],
- unsigned int *memctl_interleaving,
- unsigned int *rank_interleaving)
+ unsigned int *all_memctl_interleaving,
+ unsigned int *all_ctlr_rank_interleaving)
{
int i, j;
@@ -152,30 +152,30 @@ int step_assign_addresses(fsl_ddr_info_t *pinfo,
}
}
- /*
- * Check if all controllers are configured for memory
- * controller interleaving.
- */
j = 0;
- for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
- if (pinfo->memctl_opts[i].memctl_interleaving) {
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++)
+ if (pinfo->memctl_opts[i].memctl_interleaving)
j++;
- }
- }
- if (j == 2)
- *memctl_interleaving = 1;
+ /*
+ * Not support less than all memory controllers interleaving
+ * if more than two controllers
+ */
+ if (j == CONFIG_NUM_DDR_CONTROLLERS)
+ *all_memctl_interleaving = 1;
/* Check that all controllers are rank interleaving. */
j = 0;
- for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
- if (pinfo->memctl_opts[i].ba_intlv_ctl) {
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++)
+ if (pinfo->memctl_opts[i].ba_intlv_ctl)
j++;
- }
- }
- if (j == 2)
- *rank_interleaving = 1;
+ /*
+ * All memory controllers must be populated to qualify for
+ * all controller rank interleaving
+ */
+ if (j == CONFIG_NUM_DDR_CONTROLLERS)
+ *all_ctlr_rank_interleaving = 1;
- if (*memctl_interleaving) {
+ if (*all_memctl_interleaving) {
unsigned long long addr, total_mem_per_ctlr = 0;
/*
* If interleaving between memory controllers,
@@ -316,7 +316,7 @@ fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step)
&pinfo->memctl_opts[i],
pinfo->dimm_params[i], i);
}
-
+ check_interleaving_options(pinfo);
case STEP_ASSIGN_ADDRESSES:
/* STEP 5: Assign addresses to chip selects */
step_assign_addresses(pinfo,
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/options.c b/arch/powerpc/cpu/mpc8xxx/ddr/options.c
index 11281b7..ebbdb69 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");
+ }
+}
diff --git a/board/freescale/mpc8641hpcn/mpc8641hpcn.c b/board/freescale/mpc8641hpcn/mpc8641hpcn.c
index d86ca12..fee310a 100644
--- a/board/freescale/mpc8641hpcn/mpc8641hpcn.c
+++ b/board/freescale/mpc8641hpcn/mpc8641hpcn.c
@@ -60,6 +60,8 @@ int checkboard(void)
return 0;
}
+const char *board_hwconfig = "foo:bar=baz";
+const char *cpu_hwconfig = "foo:bar=baz";
phys_size_t
initdram(int board_type)
diff --git a/doc/README.fsl-ddr b/doc/README.fsl-ddr
index 6e4f6e9..8c37bbe 100644
--- a/doc/README.fsl-ddr
+++ b/doc/README.fsl-ddr
@@ -27,6 +27,9 @@ Table of interleaving modes supported in cpu/8xxx/ddr/
from each controller. {CS2+CS3} on each controller are only rank
interleaved on that controller.
+ For memory controller interleaving, identical DIMMs are suggested. Software
+ doesn't check the size or organization of interleaved DIMMs.
+
The ways to configure the ddr interleaving mode
==============================================
1. In board header file(e.g.MPC8572DS.h), add default interleaving setting
diff --git a/include/configs/MPC8641HPCN.h b/include/configs/MPC8641HPCN.h
index 0d1f779..974cb6b 100644
--- a/include/configs/MPC8641HPCN.h
+++ b/include/configs/MPC8641HPCN.h
@@ -122,6 +122,8 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
#define CONFIG_SYS_CCSRBAR_PHYS CONFIG_SYS_CCSRBAR_PHYS_LOW
#endif
+#define CONFIG_HWCONFIG /* use hwconfig to control memory interleaving */
+
/*
* DDR Setup
*/
--
1.6.0.6
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