Zong Li | feea3fb | 2021-09-01 15:01:39 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (C) 2021 SiFive |
| 4 | */ |
| 5 | |
Tom Rini | abb9a04 | 2024-05-18 20:20:43 -0600 | [diff] [blame] | 6 | #include <common.h> |
Zong Li | feea3fb | 2021-09-01 15:01:39 +0800 | [diff] [blame] | 7 | #include <cache.h> |
| 8 | #include <dm.h> |
| 9 | #include <asm/io.h> |
| 10 | #include <dm/device.h> |
| 11 | #include <linux/bitfield.h> |
| 12 | |
| 13 | #define SIFIVE_CCACHE_CONFIG 0x000 |
| 14 | #define SIFIVE_CCACHE_CONFIG_WAYS GENMASK(15, 8) |
| 15 | |
| 16 | #define SIFIVE_CCACHE_WAY_ENABLE 0x008 |
| 17 | |
| 18 | struct sifive_ccache { |
| 19 | void __iomem *base; |
| 20 | }; |
| 21 | |
| 22 | static int sifive_ccache_enable(struct udevice *dev) |
| 23 | { |
| 24 | struct sifive_ccache *priv = dev_get_priv(dev); |
| 25 | u32 config; |
| 26 | u32 ways; |
| 27 | |
| 28 | /* Enable all ways of composable cache */ |
| 29 | config = readl(priv->base + SIFIVE_CCACHE_CONFIG); |
| 30 | ways = FIELD_GET(SIFIVE_CCACHE_CONFIG_WAYS, config); |
| 31 | |
| 32 | writel(ways - 1, priv->base + SIFIVE_CCACHE_WAY_ENABLE); |
| 33 | |
| 34 | return 0; |
| 35 | } |
| 36 | |
| 37 | static int sifive_ccache_get_info(struct udevice *dev, struct cache_info *info) |
| 38 | { |
| 39 | struct sifive_ccache *priv = dev_get_priv(dev); |
| 40 | |
Bin Meng | 9f50173 | 2021-09-12 11:15:08 +0800 | [diff] [blame] | 41 | info->base = (uintptr_t)priv->base; |
Zong Li | feea3fb | 2021-09-01 15:01:39 +0800 | [diff] [blame] | 42 | |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static const struct cache_ops sifive_ccache_ops = { |
| 47 | .enable = sifive_ccache_enable, |
| 48 | .get_info = sifive_ccache_get_info, |
| 49 | }; |
| 50 | |
| 51 | static int sifive_ccache_probe(struct udevice *dev) |
| 52 | { |
| 53 | struct sifive_ccache *priv = dev_get_priv(dev); |
| 54 | |
| 55 | priv->base = dev_read_addr_ptr(dev); |
| 56 | if (!priv->base) |
| 57 | return -EINVAL; |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static const struct udevice_id sifive_ccache_ids[] = { |
| 63 | { .compatible = "sifive,fu540-c000-ccache" }, |
| 64 | { .compatible = "sifive,fu740-c000-ccache" }, |
Yanhong Wang | a7d8d7c | 2023-03-29 11:42:09 +0800 | [diff] [blame] | 65 | { .compatible = "sifive,ccache0" }, |
Zong Li | feea3fb | 2021-09-01 15:01:39 +0800 | [diff] [blame] | 66 | {} |
| 67 | }; |
| 68 | |
| 69 | U_BOOT_DRIVER(sifive_ccache) = { |
| 70 | .name = "sifive_ccache", |
| 71 | .id = UCLASS_CACHE, |
| 72 | .of_match = sifive_ccache_ids, |
| 73 | .probe = sifive_ccache_probe, |
| 74 | .priv_auto = sizeof(struct sifive_ccache), |
| 75 | .ops = &sifive_ccache_ops, |
| 76 | }; |