123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475 |
- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2021 SiFive
- */
- #include <common.h>
- #include <cache.h>
- #include <dm.h>
- #include <asm/io.h>
- #include <dm/device.h>
- #include <linux/bitfield.h>
- #define SIFIVE_CCACHE_CONFIG 0x000
- #define SIFIVE_CCACHE_CONFIG_WAYS GENMASK(15, 8)
- #define SIFIVE_CCACHE_WAY_ENABLE 0x008
- struct sifive_ccache {
- void __iomem *base;
- };
- static int sifive_ccache_enable(struct udevice *dev)
- {
- struct sifive_ccache *priv = dev_get_priv(dev);
- u32 config;
- u32 ways;
- /* Enable all ways of composable cache */
- config = readl(priv->base + SIFIVE_CCACHE_CONFIG);
- ways = FIELD_GET(SIFIVE_CCACHE_CONFIG_WAYS, config);
- writel(ways - 1, priv->base + SIFIVE_CCACHE_WAY_ENABLE);
- return 0;
- }
- static int sifive_ccache_get_info(struct udevice *dev, struct cache_info *info)
- {
- struct sifive_ccache *priv = dev_get_priv(dev);
- info->base = (phys_addr_t)priv->base;
- return 0;
- }
- static const struct cache_ops sifive_ccache_ops = {
- .enable = sifive_ccache_enable,
- .get_info = sifive_ccache_get_info,
- };
- static int sifive_ccache_probe(struct udevice *dev)
- {
- struct sifive_ccache *priv = dev_get_priv(dev);
- priv->base = dev_read_addr_ptr(dev);
- if (!priv->base)
- return -EINVAL;
- return 0;
- }
- static const struct udevice_id sifive_ccache_ids[] = {
- { .compatible = "sifive,fu540-c000-ccache" },
- { .compatible = "sifive,fu740-c000-ccache" },
- {}
- };
- U_BOOT_DRIVER(sifive_ccache) = {
- .name = "sifive_ccache",
- .id = UCLASS_CACHE,
- .of_match = sifive_ccache_ids,
- .probe = sifive_ccache_probe,
- .priv_auto = sizeof(struct sifive_ccache),
- .ops = &sifive_ccache_ops,
- };
|