diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/edac/altera_edac.c | 58 |
1 files changed, 26 insertions, 32 deletions
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c index 3c4929fda9d5..1d55c5b98024 100644 --- a/drivers/edac/altera_edac.c +++ b/drivers/edac/altera_edac.c @@ -219,36 +219,31 @@ static void altr_sdr_mc_create_debugfs_nodes(struct mem_ctl_info *mci) {} #endif -/* Get total memory size in bytes */ -static u32 altr_sdram_get_total_mem_size(struct regmap *mc_vbase) +/* Get total memory size from Open Firmware DTB */ +static unsigned long get_total_mem(void) { - u32 size, read_reg, row, bank, col, cs, width; - - if (regmap_read(mc_vbase, DRAMADDRW_OFST, &read_reg) < 0) - return 0; - - if (regmap_read(mc_vbase, DRAMIFWIDTH_OFST, &width) < 0) - return 0; - - col = (read_reg & DRAMADDRW_COLBIT_MASK) >> - DRAMADDRW_COLBIT_SHIFT; - row = (read_reg & DRAMADDRW_ROWBIT_MASK) >> - DRAMADDRW_ROWBIT_SHIFT; - bank = (read_reg & DRAMADDRW_BANKBIT_MASK) >> - DRAMADDRW_BANKBIT_SHIFT; - cs = (read_reg & DRAMADDRW_CSBIT_MASK) >> - DRAMADDRW_CSBIT_SHIFT; - - /* Correct for ECC as its not addressible */ - if (width == DRAMIFWIDTH_32B_ECC) - width = 32; - if (width == DRAMIFWIDTH_16B_ECC) - width = 16; - - /* calculate the SDRAM size base on this info */ - size = 1 << (row + bank + col); - size = size * cs * (width / 8); - return size; + struct device_node *np = NULL; + const unsigned int *reg, *reg_end; + int len, sw, aw; + unsigned long start, size, total_mem = 0; + + for_each_node_by_type(np, "memory") { + aw = of_n_addr_cells(np); + sw = of_n_size_cells(np); + reg = (const unsigned int *)of_get_property(np, "reg", &len); + reg_end = reg + (len / sizeof(u32)); + + total_mem = 0; + do { + start = of_read_number(reg, aw); + reg += aw; + size = of_read_number(reg, sw); + reg += sw; + total_mem += size; + } while (reg < reg_end); + } + edac_dbg(0, "total_mem 0x%lx\n", total_mem); + return total_mem; } static int altr_sdram_probe(struct platform_device *pdev) @@ -280,10 +275,9 @@ static int altr_sdram_probe(struct platform_device *pdev) } /* Grab memory size from device tree. */ - mem_size = altr_sdram_get_total_mem_size(mc_vbase); + mem_size = get_total_mem(); if (!mem_size) { - edac_printk(KERN_ERR, EDAC_MC, - "Unable to calculate memory size\n"); + edac_printk(KERN_ERR, EDAC_MC, "Unable to calculate memory size\n"); return -ENODEV; } |