* Check DDR interleaving mode from environment by reading memctl_intlv_ctl and ba_intlv_ctl. * Print DDR interleaving mode information * Add doc/README.fsl-ddr to describe the interleaving setting
Signed-off-by: Haiying Wang Haiying.Wang@freescale.com --- cpu/mpc8xxx/ddr/main.c | 37 +++++++++++++++++++++ cpu/mpc8xxx/ddr/options.c | 80 ++++++++++++++++++++++++++++++++++++++++++--- doc/README.fsl-ddr | 69 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 181 insertions(+), 5 deletions(-) create mode 100644 doc/README.fsl-ddr
diff --git a/cpu/mpc8xxx/ddr/main.c b/cpu/mpc8xxx/ddr/main.c index 98a8651..d5173c3 100644 --- a/cpu/mpc8xxx/ddr/main.c +++ b/cpu/mpc8xxx/ddr/main.c @@ -164,6 +164,24 @@ int step_assign_addresses(fsl_ddr_info_t *pinfo, } if (j == 2) { *memctl_interleaving = 1; + + printf("\nMemory controller interleaving enabled: "); + + switch (pinfo->memctl_opts[0].memctl_interleaving_mode) { + case FSL_DDR_CACHE_LINE_INTERLEAVING: + printf("Cache-line interleaving!\n"); + break; + case FSL_DDR_PAGE_INTERLEAVING: + printf("Page interleaving!\n"); + break; + case FSL_DDR_BANK_INTERLEAVING: + printf("Bank interleaving!\n"); + break; + case FSL_DDR_SUPERBANK_INTERLEAVING: + printf("Super bank interleaving\n"); + default: + break; + } }
/* Check that all controllers are rank interleaving. */ @@ -175,6 +193,25 @@ int step_assign_addresses(fsl_ddr_info_t *pinfo, } if (j == 2) { *rank_interleaving = 1; + + printf("Bank(chip-select) interleaving enabled: "); + + switch (pinfo->memctl_opts[0].ba_intlv_ctl & + FSL_DDR_CS0_CS1_CS2_CS3) { + case FSL_DDR_CS0_CS1_CS2_CS3: + printf("CS0+CS1+CS2+CS3\n"); + break; + case FSL_DDR_CS0_CS1: + printf("CS0+CS1\n"); + break; + case FSL_DDR_CS2_CS3: + printf("CS2+CS3\n"); + break; + case FSL_DDR_CS0_CS1_AND_CS2_CS3: + printf("CS0+CS1 and CS2+CS3\n"); + default: + break; + } }
if (*memctl_interleaving) { diff --git a/cpu/mpc8xxx/ddr/options.c b/cpu/mpc8xxx/ddr/options.c index 99b5685..714e88d 100644 --- a/cpu/mpc8xxx/ddr/options.c +++ b/cpu/mpc8xxx/ddr/options.c @@ -22,6 +22,7 @@ unsigned int populate_memctl_options(int all_DIMMs_registered, unsigned int ctrl_num) { unsigned int i; + const char *p;
/* Chip select options. */
@@ -181,17 +182,86 @@ unsigned int populate_memctl_options(int all_DIMMs_registered, #error "FIXME determine four activates for DDR3" #endif
- /* ODT should only be used for DDR2 */ - - /* FIXME? */ - /* - * Interleaving checks. + * Check interleaving configuration from environment. + * 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. + * + * XXX: Attempt to set both 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. */ + if ((p = getenv("memctl_intlv_ctl")) != NULL) { + 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\ + are controller interleaved, force non memory \ + controller interleaving\n"); + popts->memctl_interleaving = 0; + } else { + popts->memctl_interleaving = 1; + if (strcmp(p, "cacheline") == 0) + popts->memctl_interleaving_mode = + FSL_DDR_CACHE_LINE_INTERLEAVING; + else if (strcmp(p, "page") == 0) + popts->memctl_interleaving_mode = + FSL_DDR_PAGE_INTERLEAVING; + else if (strcmp(p, "bank") == 0) + popts->memctl_interleaving_mode = + FSL_DDR_BANK_INTERLEAVING; + else if (strcmp(p, "superbank") == 0) + popts->memctl_interleaving_mode = + FSL_DDR_SUPERBANK_INTERLEAVING; + else + popts->memctl_interleaving_mode = + simple_strtoul(p, NULL, 0); + } + } + + if( (p = getenv("ba_intlv_ctl")) != NULL) { + if (strcmp(p, "cs0_cs1") == 0) + popts->ba_intlv_ctl = FSL_DDR_CS0_CS1; + else if (strcmp(p, "cs2_cs3") == 0) + popts->ba_intlv_ctl = FSL_DDR_CS2_CS3; + else if (strcmp(p, "cs0_cs1_and_cs2_cs3") == 0) + popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_AND_CS2_CS3; + else if (strcmp(p, "cs0_cs1_cs2_cs3") == 0) + popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3; + else + popts->ba_intlv_ctl = simple_strtoul(p, NULL, 0); + + switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) { + case FSL_DDR_CS0_CS1_CS2_CS3: + case FSL_DDR_CS0_CS1: + if (pdimm[0].n_ranks != 2) { + popts->ba_intlv_ctl = 0; + printf("No enough bank(chip-select) for \ + CS0+CS1, force non-interleaving!\n"); + } + break; + case FSL_DDR_CS2_CS3: + if (pdimm[1].n_ranks !=2){ + popts->ba_intlv_ctl = 0; + printf("No enough bank(CS) for CS2+CS3, \ + force non-interleaving!\n"); + } + break; + case FSL_DDR_CS0_CS1_AND_CS2_CS3: + if ((pdimm[0].n_ranks != 2)||(pdimm[1].n_ranks != 2)) { + popts->ba_intlv_ctl = 0; + printf("No enough bank(CS) for CS0+CS1 or \ + CS2+CS3, force non-interleaving!\n"); + } + break; + default: + popts->ba_intlv_ctl = 0; + break; + } + }
fsl_ddr_board_options(popts, pdimm, ctrl_num);
diff --git a/doc/README.fsl-ddr b/doc/README.fsl-ddr new file mode 100644 index 0000000..357ec05 --- /dev/null +++ b/doc/README.fsl-ddr @@ -0,0 +1,69 @@ + +Table of interleaving modes supported in cpu/8xxx/ddr/ +====================================================== + +-------------+---------------------------------------------------------+ + | | Rank Interleaving | + | +--------+-----------+-----------+------------+-----------+ + |Memory | | | | 2x2 | 4x1 | + |Controller | None | 2x1 lower | 2x1 upper | {CS0+CS1}, | {CS0+CS1+ | + |Interleaving | | {CS0+CS1} | {CS2+CS3} | {CS2+CS3} | CS2+CS3} | + +-------------+--------+-----------+-----------+------------+-----------+ + |None | Yes | Yes | Yes | Yes | Yes | + +-------------+--------+-----------+-----------+------------+-----------+ + |Cacheline | Yes | Yes | No | No, Only(*)| Yes | + | |CS0 Only| | | {CS0+CS1} | | + +-------------+--------+-----------+-----------+------------+-----------+ + |Page | Yes | Yes | No | No, Only(*)| Yes | + | |CS0 Only| | | {CS0+CS1} | | + +-------------+--------+-----------+-----------+------------+-----------+ + |Bank | Yes | Yes | No | No, Only(*)| Yes | + | |CS0 Only| | | {CS0+CS1} | | + +-------------+--------+-----------+-----------+------------+-----------+ + |Superbank | No | Yes | No | No, Only(*)| Yes | + | | | | | {CS0+CS1} | | + +-------------+--------+-----------+-----------+------------+-----------+ + (*) Although the hardware can be configured with memory controller + interleaving using "2x2" rank interleaving, it only interleaves {CS0+CS1} + from each controller. {CS2+CS3} on each controller are only rank + interleaved on that controller. + +The ways to configure the ddr interleaving mode +============================================== +1. In board header file(e.g.MPC8572DS.h), add default interleaving setting + under "CONFIG_EXTRA_ENV_SETTINGS", like: + #define CONFIG_EXTRA_ENV_SETTINGS \ + "memctl_intlv_ctl=2\0" \ + ...... + +2. Run u-boot "setenv" command to configure the memory interleaving mode. + Either numerical or string value is accepted. + + # disable memory controller interleaving + setenv memctl_intlv_ctl + + # cacheline interleaving + setenv memctl_intlv_ctl 0 or setenv memctl_intlv_ctl cacheline + + # page interleaving + setenv memctl_intlv_ctl 1 or setenv memctl_intlv_ctl page + + # bank interleaving + setenv memctl_intlv_ctl 2 or setenv memctl_intlv_ctl bank + + # superbank + setenv memctl_intlv_ctl 3 or setenv memctl_intlv_ctl superbank + + # disable bank (chip-select) interleaving + setenv ba_intlv_ctl + + # bank(chip-select) interleaving cs0+cs1 + setenv ba_intlv_ctl 0x40 or setenv ba_intlv_ctl cs0_cs1 + + # bank(chip-select) interleaving cs2+cs3 + setenv ba_intlv_ctl 0x20 or setenv ba_intlv_ctl cs2_cs3 + + # bank(chip-select) interleaving (cs0+cs1) and (cs2+cs3) (2x2) + setenv ba_intlv_ctl 0x60 or setenv ba_intlv_ctl cs0_cs1_and_cs2_cs3 + + # bank(chip-select) interleaving (cs0+cs1+cs2+cs3) (4x1) + setenv ba_intlv_ctl 0x04 or setenv ba_intlv_ctl cs0_cs1_cs2_cs3 +