diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c | 10 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/ddr.h | 8 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/main.c | 31 |
3 files changed, 40 insertions, 9 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c index 3fec100..8fdafdb 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c @@ -1176,7 +1176,8 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, fsl_ddr_cfg_regs_t *ddr, const common_timing_params_t *common_dimm, const dimm_params_t *dimm_params, - unsigned int dbw_cap_adj) + unsigned int dbw_cap_adj, + unsigned int size_only) { unsigned int i; unsigned int cas_latency; @@ -1394,6 +1395,13 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, printf("CS%d is disabled.\n", i); } + /* + * In the case we only need to compute the ddr sdram size, we only need + * to set csn registers, so return from here. + */ + if (size_only) + return 0; + set_ddr_eor(ddr, popts); #if !defined(CONFIG_FSL_DDR1) diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ddr.h b/arch/powerpc/cpu/mpc8xxx/ddr/ddr.h index 98acb8d..35b60a0 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/ddr.h +++ b/arch/powerpc/cpu/mpc8xxx/ddr/ddr.h @@ -1,5 +1,5 @@ /* - * Copyright 2008 Freescale Semiconductor, Inc. + * Copyright 2008-2011 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -55,7 +55,8 @@ typedef struct { #define STEP_ALL 0xFFF extern unsigned long long -fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step); +fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step, + unsigned int size_only); extern const char * step_to_string(unsigned int step); @@ -64,7 +65,8 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, fsl_ddr_cfg_regs_t *ddr, const common_timing_params_t *common_dimm, const dimm_params_t *dimm_parameters, - unsigned int dbw_capacity_adjust); + unsigned int dbw_capacity_adjust, + unsigned int size_only); extern unsigned int compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params, common_timing_params_t *outpdimm, diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/main.c b/arch/powerpc/cpu/mpc8xxx/ddr/main.c index e3888ff..bb96d66 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/main.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/main.c @@ -1,5 +1,5 @@ /* - * Copyright 2008 Freescale Semiconductor, Inc. + * Copyright 2008-2011 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -233,7 +233,8 @@ int step_assign_addresses(fsl_ddr_info_t *pinfo, } unsigned long long -fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step) +fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step, + unsigned int size_only) { unsigned int i, j; unsigned int all_controllers_memctl_interleaving = 0; @@ -338,7 +339,8 @@ fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step) &pinfo->memctl_opts[i], &ddr_reg[i], &timing_params[i], pinfo->dimm_params[i], - dbw_capacity_adjust[i]); + dbw_capacity_adjust[i], + size_only); } default: @@ -405,7 +407,7 @@ phys_size_t fsl_ddr_sdram(void) memset(&info, 0, sizeof(fsl_ddr_info_t)); /* Compute it once normally. */ - total_memory = fsl_ddr_compute(&info, STEP_GET_SPD); + total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 0); /* Check for memory controller interleaving. */ memctl_interleaved = 0; @@ -430,7 +432,8 @@ phys_size_t fsl_ddr_sdram(void) info.memctl_opts[i].memctl_interleaving = 0; debug("Recomputing with memctl_interleaving off.\n"); total_memory = fsl_ddr_compute(&info, - STEP_ASSIGN_ADDRESSES); + STEP_ASSIGN_ADDRESSES, + 0); } } @@ -478,3 +481,21 @@ phys_size_t fsl_ddr_sdram(void) return total_memory; } + +/* + * fsl_ddr_sdram_size() - This function only returns the size of the total + * memory without setting ddr control registers. + */ +phys_size_t +fsl_ddr_sdram_size(void) +{ + fsl_ddr_info_t info; + unsigned long long total_memory = 0; + + memset(&info, 0 , sizeof(fsl_ddr_info_t)); + + /* Compute it once normally. */ + total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 1); + + return total_memory; +} |