1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2005-2017 Andes Technology Corporation
4 #include <linux/compiler.h>
5 #include <linux/of_address.h>
6 #include <linux/of_fdt.h>
7 #include <linux/of_platform.h>
8 #include <asm/l2_cache.h>
10 void __iomem *atl2c_base;
11 static const struct of_device_id atl2c_ids[] __initconst = {
12 {.compatible = "andestech,atl2c",}
15 static int __init atl2c_of_init(void)
17 struct device_node *np;
19 unsigned long tmp = 0;
20 unsigned long l2set, l2way, l2clsz;
22 if (!(__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskL2C))
25 np = of_find_matching_node(NULL, atl2c_ids);
29 if (of_address_to_resource(np, 0, &res))
32 atl2c_base = ioremap(res.start, resource_size(&res));
37 64 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2SET) >>
41 ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2WAY) >>
44 4 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2CLSZ) >>
45 L2_CA_CONF_offL2CLSZ);
46 pr_info("L2:%luKB/%luS/%luW/%luB\n",
47 l2set * l2way * l2clsz / 1024, l2set, l2way, l2clsz);
49 tmp = L2C_R_REG(L2CC_PROT_OFF);
50 tmp &= ~L2CC_PROT_mskMRWEN;
51 L2C_W_REG(L2CC_PROT_OFF, tmp);
53 tmp = L2C_R_REG(L2CC_SETUP_OFF);
54 tmp &= ~L2CC_SETUP_mskPART;
55 L2C_W_REG(L2CC_SETUP_OFF, tmp);
57 tmp = L2C_R_REG(L2CC_CTRL_OFF);
58 tmp |= L2CC_CTRL_mskEN;
59 L2C_W_REG(L2CC_CTRL_OFF, tmp);
64 subsys_initcall(atl2c_of_init);