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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2005-2017 Andes Technology Corporation
#include <linux/compiler.h>
#include <linux/of_address.h>
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
#include <asm/l2_cache.h>
void __iomem *atl2c_base;
static const struct of_device_id atl2c_ids[] __initconst = {
{.compatible = "andestech,atl2c",},
{}
};
static int __init atl2c_of_init(void)
{
struct device_node *np;
struct resource res;
unsigned long tmp = 0;
unsigned long l2set, l2way, l2clsz;
if (!(__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskL2C))
return -ENODEV;
np = of_find_matching_node(NULL, atl2c_ids);
if (!np)
return -ENODEV;
if (of_address_to_resource(np, 0, &res))
return -ENODEV;
atl2c_base = ioremap(res.start, resource_size(&res));
if (!atl2c_base)
return -ENOMEM;
l2set =
64 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2SET) >>
L2_CA_CONF_offL2SET);
l2way =
1 +
((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2WAY) >>
L2_CA_CONF_offL2WAY);
l2clsz =
4 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2CLSZ) >>
L2_CA_CONF_offL2CLSZ);
pr_info("L2:%luKB/%luS/%luW/%luB\n",
l2set * l2way * l2clsz / 1024, l2set, l2way, l2clsz);
tmp = L2C_R_REG(L2CC_PROT_OFF);
tmp &= ~L2CC_PROT_mskMRWEN;
L2C_W_REG(L2CC_PROT_OFF, tmp);
tmp = L2C_R_REG(L2CC_SETUP_OFF);
tmp &= ~L2CC_SETUP_mskPART;
L2C_W_REG(L2CC_SETUP_OFF, tmp);
tmp = L2C_R_REG(L2CC_CTRL_OFF);
tmp |= L2CC_CTRL_mskEN;
L2C_W_REG(L2CC_CTRL_OFF, tmp);
return 0;
}
subsys_initcall(atl2c_of_init);
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