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powerpc/8xxx: Fix bug in memctrl interleaving & bank interleaving on cs0~cs4

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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@freescale.com>
This commit is contained in:
york 2010-07-02 22:25:52 +00:00 committed by Kumar Gala
parent 79e4e6480b
commit 076bff8f47
7 changed files with 190 additions and 76 deletions
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111
arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
View file

@ -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;
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 (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.
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;
}
}

1
arch/powerpc/cpu/mpc8xxx/ddr/ddr.h
View file

@ -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);

40
arch/powerpc/cpu/mpc8xxx/ddr/main.c
View file

@ -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,

107
arch/powerpc/cpu/mpc8xxx/ddr/options.c
View file

@ -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(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);
}
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
if (pdimm[1].n_ranks != 2) {
popts->ba_intlv_ctl = 0;
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");
}
}

2
board/freescale/mpc8641hpcn/mpc8641hpcn.c
View file

@ -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)

3
doc/README.fsl-ddr
View file

@ -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

2
include/configs/MPC8641HPCN.h
View file

@ -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
*/