in mm/cache-l2x0.c [1126:1299]
static void __init l2c310_of_parse(const struct device_node *np,
u32 *aux_val, u32 *aux_mask)
{
u32 data[3] = { 0, 0, 0 };
u32 tag[3] = { 0, 0, 0 };
u32 filter[2] = { 0, 0 };
u32 assoc;
u32 prefetch;
u32 power;
u32 val;
int ret;
of_property_read_u32_array(np, "arm,tag-latency", tag, ARRAY_SIZE(tag));
if (tag[0] && tag[1] && tag[2])
l2x0_saved_regs.tag_latency =
L310_LATENCY_CTRL_RD(tag[0] - 1) |
L310_LATENCY_CTRL_WR(tag[1] - 1) |
L310_LATENCY_CTRL_SETUP(tag[2] - 1);
of_property_read_u32_array(np, "arm,data-latency",
data, ARRAY_SIZE(data));
if (data[0] && data[1] && data[2])
l2x0_saved_regs.data_latency =
L310_LATENCY_CTRL_RD(data[0] - 1) |
L310_LATENCY_CTRL_WR(data[1] - 1) |
L310_LATENCY_CTRL_SETUP(data[2] - 1);
of_property_read_u32_array(np, "arm,filter-ranges",
filter, ARRAY_SIZE(filter));
if (filter[1]) {
l2x0_saved_regs.filter_end =
ALIGN(filter[0] + filter[1], SZ_1M);
l2x0_saved_regs.filter_start = (filter[0] & ~(SZ_1M - 1))
| L310_ADDR_FILTER_EN;
}
ret = l2x0_cache_size_of_parse(np, aux_val, aux_mask, &assoc, SZ_512K);
if (!ret) {
switch (assoc) {
case 16:
*aux_val &= ~L2X0_AUX_CTRL_ASSOC_MASK;
*aux_val |= L310_AUX_CTRL_ASSOCIATIVITY_16;
*aux_mask &= ~L2X0_AUX_CTRL_ASSOC_MASK;
break;
case 8:
*aux_val &= ~L2X0_AUX_CTRL_ASSOC_MASK;
*aux_mask &= ~L2X0_AUX_CTRL_ASSOC_MASK;
break;
default:
pr_err("L2C-310 OF cache associativity %d invalid, only 8 or 16 permitted\n",
assoc);
break;
}
}
if (of_property_read_bool(np, "arm,shared-override")) {
*aux_val |= L2C_AUX_CTRL_SHARED_OVERRIDE;
*aux_mask &= ~L2C_AUX_CTRL_SHARED_OVERRIDE;
}
if (of_property_read_bool(np, "arm,parity-enable")) {
*aux_val |= L2C_AUX_CTRL_PARITY_ENABLE;
*aux_mask &= ~L2C_AUX_CTRL_PARITY_ENABLE;
} else if (of_property_read_bool(np, "arm,parity-disable")) {
*aux_val &= ~L2C_AUX_CTRL_PARITY_ENABLE;
*aux_mask &= ~L2C_AUX_CTRL_PARITY_ENABLE;
}
if (of_property_read_bool(np, "arm,early-bresp-disable"))
l2x0_bresp_disable = true;
if (of_property_read_bool(np, "arm,full-line-zero-disable"))
l2x0_flz_disable = true;
prefetch = l2x0_saved_regs.prefetch_ctrl;
ret = of_property_read_u32(np, "arm,double-linefill", &val);
if (ret == 0) {
if (val)
prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL;
else
prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF arm,double-linefill property value is missing\n");
}
ret = of_property_read_u32(np, "arm,double-linefill-incr", &val);
if (ret == 0) {
if (val)
prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL_INCR;
else
prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL_INCR;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF arm,double-linefill-incr property value is missing\n");
}
ret = of_property_read_u32(np, "arm,double-linefill-wrap", &val);
if (ret == 0) {
if (!val)
prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL_WRAP;
else
prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL_WRAP;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF arm,double-linefill-wrap property value is missing\n");
}
ret = of_property_read_u32(np, "arm,prefetch-drop", &val);
if (ret == 0) {
if (val)
prefetch |= L310_PREFETCH_CTRL_PREFETCH_DROP;
else
prefetch &= ~L310_PREFETCH_CTRL_PREFETCH_DROP;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF arm,prefetch-drop property value is missing\n");
}
ret = of_property_read_u32(np, "arm,prefetch-offset", &val);
if (ret == 0) {
prefetch &= ~L310_PREFETCH_CTRL_OFFSET_MASK;
prefetch |= val & L310_PREFETCH_CTRL_OFFSET_MASK;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF arm,prefetch-offset property value is missing\n");
}
ret = of_property_read_u32(np, "prefetch-data", &val);
if (ret == 0) {
if (val) {
prefetch |= L310_PREFETCH_CTRL_DATA_PREFETCH;
*aux_val |= L310_PREFETCH_CTRL_DATA_PREFETCH;
} else {
prefetch &= ~L310_PREFETCH_CTRL_DATA_PREFETCH;
*aux_val &= ~L310_PREFETCH_CTRL_DATA_PREFETCH;
}
*aux_mask &= ~L310_PREFETCH_CTRL_DATA_PREFETCH;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF prefetch-data property value is missing\n");
}
ret = of_property_read_u32(np, "prefetch-instr", &val);
if (ret == 0) {
if (val) {
prefetch |= L310_PREFETCH_CTRL_INSTR_PREFETCH;
*aux_val |= L310_PREFETCH_CTRL_INSTR_PREFETCH;
} else {
prefetch &= ~L310_PREFETCH_CTRL_INSTR_PREFETCH;
*aux_val &= ~L310_PREFETCH_CTRL_INSTR_PREFETCH;
}
*aux_mask &= ~L310_PREFETCH_CTRL_INSTR_PREFETCH;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF prefetch-instr property value is missing\n");
}
l2x0_saved_regs.prefetch_ctrl = prefetch;
power = l2x0_saved_regs.pwr_ctrl |
L310_DYNAMIC_CLK_GATING_EN | L310_STNDBY_MODE_EN;
ret = of_property_read_u32(np, "arm,dynamic-clock-gating", &val);
if (!ret) {
if (!val)
power &= ~L310_DYNAMIC_CLK_GATING_EN;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF dynamic-clock-gating property value is missing or invalid\n");
}
ret = of_property_read_u32(np, "arm,standby-mode", &val);
if (!ret) {
if (!val)
power &= ~L310_STNDBY_MODE_EN;
} else if (ret != -EINVAL) {
pr_err("L2C-310 OF standby-mode property value is missing or invalid\n");
}
l2x0_saved_regs.pwr_ctrl = power;
}