Commit 43a21839 authored by Zong Li's avatar Zong Li Committed by Leo Yu-Chi Liang
Browse files

cache: add sifive composable cache driver



This driver is currently responsible for enabling all ccache ways.
Composable cache could be configure as RAM or cache, we will use it as
RAM at the beginning to put the u-boot SPL there. In u-boot proper
phrase, we will use the composable cache as cache, and try to enable the
cache ways.
Signed-off-by: default avatarZong Li <zong.li@sifive.com>
Reviewed-by: default avatarSean Anderson <seanga2@gmail.com>
Reviewed-by: Rick Chen's avatarRick Chen <rick@andestech.com>
parent 9d84795f
......@@ -39,4 +39,11 @@ config NCORE_CACHE
controller. The driver initializes cache directories and coherent
agent interfaces.
config SIFIVE_CCACHE
bool "SiFive composable cache"
select CACHE
help
This driver is for SiFive Composable L2/L3 cache. It enables cache
ways of composable cache.
endmenu
......@@ -4,3 +4,4 @@ obj-$(CONFIG_SANDBOX) += sandbox_cache.o
obj-$(CONFIG_L2X0_CACHE) += cache-l2x0.o
obj-$(CONFIG_NCORE_CACHE) += cache-ncore.o
obj-$(CONFIG_V5L2_CACHE) += cache-v5l2.o
obj-$(CONFIG_SIFIVE_CCACHE) += cache-sifive-ccache.o
// 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,
};
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