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driver/ddr: Restruct driver to allow standalone memory space

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U-boot has been initializing DDR for the main memory. The presumption
is the memory stays as a big continuous block, either linear or
interleaved. This change is to support putting some DDR controllers
to separated space without counting into main memory. The standalone
memory controller could use different number of DIMM slots.

Signed-off-by: York Sun <yorksun@freescale.com>
This commit is contained in:
York Sun 2014-08-01 15:51:00 -07:00
parent e211c12e77
commit 1d71efbb03
8 changed files with 240 additions and 110 deletions
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12
drivers/ddr/fsl/ddr4_dimm_params.c
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@ -113,7 +113,7 @@ compute_ranksize(const struct ddr4_spd_eeprom_s *spd)
#define spd_to_ps(mtb, ftb) \
(mtb * pdimm->mtb_ps + (ftb * pdimm->ftb_10th_ps) / 10)
/*
* ddr_compute_dimm_parameters for DDR3 SPD
* ddr_compute_dimm_parameters for DDR4 SPD
*
* Compute DIMM parameters based upon the SPD information in spd.
* Writes the results to the dimm_params_t structure pointed by pdimm.
@ -165,17 +165,17 @@ ddr_compute_dimm_parameters(const generic_spd_eeprom_t *spd,
+ pdimm->ec_sdram_width;
pdimm->device_width = 1 << ((spd->organization & 0x7) + 2);
/* These are the types defined by the JEDEC DDR3 SPD spec */
/* These are the types defined by the JEDEC SPD spec */
pdimm->mirrored_dimm = 0;
pdimm->registered_dimm = 0;
switch (spd->module_type & DDR3_SPD_MODULETYPE_MASK) {
case DDR3_SPD_MODULETYPE_RDIMM:
switch (spd->module_type & DDR4_SPD_MODULETYPE_MASK) {
case DDR4_SPD_MODULETYPE_RDIMM:
/* Registered/buffered DIMMs */
pdimm->registered_dimm = 1;
break;
case DDR3_SPD_MODULETYPE_UDIMM:
case DDR3_SPD_MODULETYPE_SO_DIMM:
case DDR4_SPD_MODULETYPE_UDIMM:
case DDR4_SPD_MODULETYPE_SO_DIMM:
/* Unbuffered DIMMs */
if (spd->mod_section.unbuffered.addr_mapping & 0x1)
pdimm->mirrored_dimm = 1;