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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2019 Intel Corporation <www.intel.com>
- */
- #include <common.h>
- #include <command.h>
- #include <dm.h>
- #include <asm/io.h>
- #include <asm/pl310.h>
- static void l2c310_of_parse_and_init(struct udevice *dev)
- {
- u32 tag[3] = { 0, 0, 0 };
- u32 saved_reg, prefetch;
- struct pl310_regs *regs = (struct pl310_regs *)dev_read_addr(dev);
- /* Disable the L2 Cache */
- clrbits_le32(®s->pl310_ctrl, L2X0_CTRL_EN);
- saved_reg = readl(®s->pl310_aux_ctrl);
- if (!dev_read_u32(dev, "prefetch-data", &prefetch)) {
- if (prefetch)
- saved_reg |= L310_AUX_CTRL_DATA_PREFETCH_MASK;
- else
- saved_reg &= ~L310_AUX_CTRL_DATA_PREFETCH_MASK;
- }
- if (!dev_read_u32(dev, "prefetch-instr", &prefetch)) {
- if (prefetch)
- saved_reg |= L310_AUX_CTRL_INST_PREFETCH_MASK;
- else
- saved_reg &= ~L310_AUX_CTRL_INST_PREFETCH_MASK;
- }
- if (dev_read_bool(dev, "arm,shared-override"))
- saved_reg |= L310_SHARED_ATT_OVERRIDE_ENABLE;
- saved_reg = readl(®s->pl310_tag_latency_ctrl);
- if (!dev_read_u32_array(dev, "arm,tag-latency", tag, 3))
- saved_reg |= L310_LATENCY_CTRL_RD(tag[0] - 1) |
- L310_LATENCY_CTRL_WR(tag[1] - 1) |
- L310_LATENCY_CTRL_SETUP(tag[2] - 1);
- writel(saved_reg, ®s->pl310_tag_latency_ctrl);
- saved_reg = readl(®s->pl310_data_latency_ctrl);
- if (!dev_read_u32_array(dev, "arm,data-latency", tag, 3))
- saved_reg |= L310_LATENCY_CTRL_RD(tag[0] - 1) |
- L310_LATENCY_CTRL_WR(tag[1] - 1) |
- L310_LATENCY_CTRL_SETUP(tag[2] - 1);
- writel(saved_reg, ®s->pl310_data_latency_ctrl);
- /* Enable the L2 cache */
- setbits_le32(®s->pl310_ctrl, L2X0_CTRL_EN);
- }
- static int l2x0_probe(struct udevice *dev)
- {
- l2c310_of_parse_and_init(dev);
- return 0;
- }
- static const struct udevice_id l2x0_ids[] = {
- { .compatible = "arm,pl310-cache" },
- {}
- };
- U_BOOT_DRIVER(pl310_cache) = {
- .name = "pl310_cache",
- .id = UCLASS_CACHE,
- .of_match = l2x0_ids,
- .probe = l2x0_probe,
- .flags = DM_FLAG_PRE_RELOC,
- };
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