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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;
writel(saved_reg, ®s->pl310_aux_ctrl);
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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