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-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c10
-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/ddr.h8
-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/main.c31
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;
+}