[U-Boot] [PATCH 1/6] Make DDR interleaving mode work correctly
Haiying Wang
Haiying.Wang at freescale.com
Fri Oct 3 18:36:39 CEST 2008
Fix some bugs:
1. Correctly set intlv_ctl in cs_config.
2. Correctly set sa, ea in cs_bnds when bank interleaving mode is enabled.
3. Set base_address and total memory for each ddr controller in memory
controller interleaving mode.
Signed-off-by: Haiying Wang <Haiying.Wang at freescale.com>
---
cpu/mpc8xxx/ddr/ctrl_regs.c | 61 +++++++++++++++++++++++++++++++-------
cpu/mpc8xxx/ddr/main.c | 5 +++
include/asm-ppc/fsl_ddr_sdram.h | 12 +++++++
3 files changed, 66 insertions(+), 12 deletions(-)
diff --git a/cpu/mpc8xxx/ddr/ctrl_regs.c b/cpu/mpc8xxx/ddr/ctrl_regs.c
index e6c2a5c..6297141 100644
--- a/cpu/mpc8xxx/ddr/ctrl_regs.c
+++ b/cpu/mpc8xxx/ddr/ctrl_regs.c
@@ -95,16 +95,10 @@ static void set_csn_config(int i, fsl_ddr_cfg_regs_t *ddr,
col_bits_cs_n = dimm_params[i/2].n_col_addr - 8;
}
- /* FIXME: intlv_en, intlv_ctl only on CS0_CONFIG */
- if (i != 0) {
- intlv_en = 0;
- intlv_ctl = 0;
- }
-
ddr->cs[i].config = (0
| ((cs_n_en & 0x1) << 31)
| ((intlv_en & 0x3) << 29)
- | ((intlv_en & 0xf) << 24)
+ | ((intlv_ctl & 0xf) << 24)
| ((ap_n_en & 0x1) << 23)
/* XXX: some implementation only have 1 bit starting at left */
@@ -874,8 +868,13 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
phys_size_t sa = 0;
phys_size_t ea = 0;
- if (popts->ba_intlv_ctl && i > 0) {
- /* Don't set up boundaries if bank interleaving */
+
+ 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.
+ */
break;
}
@@ -894,7 +893,9 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
* on each controller is twice the amount present on
* each controller.
*/
- ea = (2 * common_dimm->total_mem >> dbw_cap_adj) - 1;
+ unsigned long long rank_density
+ = dimm_params[0].capacity;
+ ea = (2 * (rank_density >> dbw_cap_adj)) - 1;
}
else if (!popts->memctl_interleaving && popts->ba_intlv_ctl) {
/*
@@ -906,8 +907,44 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
* controller needs to be programmed into its
* respective CS0_BNDS.
*/
- sa = common_dimm->base_address;
- ea = sa + (common_dimm->total_mem >> dbw_cap_adj) - 1;
+ 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
+ * needs to be set.
+ */
+ sa = common_dimm->base_address;
+ ea = sa + (4 * (rank_density >> dbw_cap_adj))-1;
+ break;
+ case FSL_DDR_CS0_CS1_AND_CS2_CS3:
+ /* 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 >>
+ dbw_cap_adj)) - 1;
+ }
+ break;
+ case FSL_DDR_CS0_CS1:
+ /* CS0+CS1 interleaving, CS0_CNDS needs
+ * to be set
+ */
+ sa = common_dimm->base_address;
+ ea = sa + (2 * (rank_density >> dbw_cap_adj))-1;
+ 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;
+ }
+ break;
+ default: /* No bank(chip-select) interleaving */
+ break;
+ }
}
else if (popts->memctl_interleaving && !popts->ba_intlv_ctl) {
/*
diff --git a/cpu/mpc8xxx/ddr/main.c b/cpu/mpc8xxx/ddr/main.c
index c340d56..d26c5c5 100644
--- a/cpu/mpc8xxx/ddr/main.c
+++ b/cpu/mpc8xxx/ddr/main.c
@@ -179,6 +179,7 @@ int step_assign_addresses(fsl_ddr_info_t *pinfo,
if (*memctl_interleaving) {
phys_addr_t addr;
+ phys_size_t total_mem_per_ctlr = 0;
/*
* If interleaving between memory controllers,
@@ -197,14 +198,18 @@ int step_assign_addresses(fsl_ddr_info_t *pinfo,
for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
addr = 0;
+ pinfo->common_timing_params[i].base_address =
+ (phys_addr_t)addr;
for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
unsigned long long cap
= pinfo->dimm_params[i][j].capacity;
pinfo->dimm_params[i][j].base_address = addr;
addr += (phys_addr_t)(cap >> dbw_cap_adj[i]);
+ total_mem_per_ctlr += cap >> dbw_cap_adj[i];
}
}
+ pinfo->common_timing_params[0].total_mem = total_mem_per_ctlr;
} else {
/*
* Simple linear assignment if memory
diff --git a/include/asm-ppc/fsl_ddr_sdram.h b/include/asm-ppc/fsl_ddr_sdram.h
index 8adde34..c1ea7cd 100644
--- a/include/asm-ppc/fsl_ddr_sdram.h
+++ b/include/asm-ppc/fsl_ddr_sdram.h
@@ -36,6 +36,18 @@ typedef ddr2_spd_eeprom_t generic_spd_eeprom_t;
typedef ddr3_spd_eeprom_t generic_spd_eeprom_t;
#endif
+/* define bank(chip select) interleaving mode */
+#define FSL_DDR_CS0_CS1 0x40
+#define FSL_DDR_CS2_CS3 0x20
+#define FSL_DDR_CS0_CS1_AND_CS2_CS3 (FSL_DDR_CS0_CS1 | FSL_DDR_CS2_CS3)
+#define FSL_DDR_CS0_CS1_CS2_CS3 (FSL_DDR_CS0_CS1_AND_CS2_CS3 | 0x04)
+
+/* define memory controller interleaving mode */
+#define FSL_DDR_CACHE_LINE_INTERLEAVING 0x0
+#define FSL_DDR_PAGE_INTERLEAVING 0x1
+#define FSL_DDR_BANK_INTERLEAVING 0x2
+#define FSL_DDR_SUPERBANK_INTERLEAVING 0x3
+
/* Record of register values computed */
typedef struct fsl_ddr_cfg_regs_s {
struct {
--
1.6.0.2
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