diff options
Diffstat (limited to 'drivers/edac/amd64_edac.c')
| -rw-r--r-- | drivers/edac/amd64_edac.c | 50 |
1 files changed, 36 insertions, 14 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index c9eee6d33e9a..7ef73c919c5d 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -1132,12 +1132,36 @@ static int k8_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct, return ddr2_cs_size(cs_mode, dclr & WIDTH_128); } else if (pvt->ext_model >= K8_REV_D) { + unsigned diff; WARN_ON(cs_mode > 10); - if (cs_mode == 3 || cs_mode == 8) - return 32 << (cs_mode - 1); - else - return 32 << cs_mode; + /* + * the below calculation, besides trying to win an obfuscated C + * contest, maps cs_mode values to DIMM chip select sizes. The + * mappings are: + * + * cs_mode CS size (mb) + * ======= ============ + * 0 32 + * 1 64 + * 2 128 + * 3 128 + * 4 256 + * 5 512 + * 6 256 + * 7 512 + * 8 1024 + * 9 1024 + * 10 2048 + * + * Basically, it calculates a value with which to shift the + * smallest CS size of 32MB. + * + * ddr[23]_cs_size have a similar purpose. + */ + diff = cs_mode/3 + (unsigned)(cs_mode > 5); + + return 32 << (cs_mode - diff); } else { WARN_ON(cs_mode > 6); @@ -2133,6 +2157,7 @@ static void read_mc_regs(struct amd64_pvt *pvt) static u32 amd64_csrow_nr_pages(struct amd64_pvt *pvt, u8 dct, int csrow_nr) { u32 cs_mode, nr_pages; + u32 dbam = dct ? pvt->dbam1 : pvt->dbam0; /* * The math on this doesn't look right on the surface because x/2*4 can @@ -2141,16 +2166,10 @@ static u32 amd64_csrow_nr_pages(struct amd64_pvt *pvt, u8 dct, int csrow_nr) * number of bits to shift the DBAM register to extract the proper CSROW * field. */ - cs_mode = (pvt->dbam0 >> ((csrow_nr / 2) * 4)) & 0xF; + cs_mode = (dbam >> ((csrow_nr / 2) * 4)) & 0xF; nr_pages = pvt->ops->dbam_to_cs(pvt, dct, cs_mode) << (20 - PAGE_SHIFT); - /* - * If dual channel then double the memory size of single channel. - * Channel count is 1 or 2 - */ - nr_pages <<= (pvt->channel_count - 1); - debugf0(" (csrow=%d) DBAM map index= %d\n", csrow_nr, cs_mode); debugf0(" nr_pages= %u channel-count = %d\n", nr_pages, pvt->channel_count); @@ -2181,7 +2200,7 @@ static int init_csrows(struct mem_ctl_info *mci) for_each_chip_select(i, 0, pvt) { csrow = &mci->csrows[i]; - if (!csrow_enabled(i, 0, pvt)) { + if (!csrow_enabled(i, 0, pvt) && !csrow_enabled(i, 1, pvt)) { debugf1("----CSROW %d EMPTY for node %d\n", i, pvt->mc_node_id); continue; @@ -2191,7 +2210,10 @@ static int init_csrows(struct mem_ctl_info *mci) i, pvt->mc_node_id); empty = 0; - csrow->nr_pages = amd64_csrow_nr_pages(pvt, 0, i); + if (csrow_enabled(i, 0, pvt)) + csrow->nr_pages = amd64_csrow_nr_pages(pvt, 0, i); + if (csrow_enabled(i, 1, pvt)) + csrow->nr_pages += amd64_csrow_nr_pages(pvt, 1, i); find_csrow_limits(mci, i, &input_addr_min, &input_addr_max); sys_addr = input_addr_to_sys_addr(mci, input_addr_min); csrow->first_page = (u32) (sys_addr >> PAGE_SHIFT); @@ -2685,7 +2707,7 @@ static void __devexit amd64_remove_one_instance(struct pci_dev *pdev) * PCI core identifies what devices are on a system during boot, and then * inquiry this table to see if this driver is for a given device found. */ -static const struct pci_device_id amd64_pci_table[] __devinitdata = { +static DEFINE_PCI_DEVICE_TABLE(amd64_pci_table) = { { .vendor = PCI_VENDOR_ID_AMD, .device = PCI_DEVICE_ID_AMD_K8_NB_MEMCTL, |
