| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (C) 2005-2017 Andes Technology Corporation |
| 3 | |
| 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> |
| 9 | |
| 10 | void __iomem *atl2c_base; |
| 11 | static const struct of_device_id atl2c_ids[] __initconst = { |
| 12 | {.compatible = "andestech,atl2c",}, |
| 13 | {} |
| 14 | }; |
| 15 | |
| 16 | static int __init atl2c_of_init(void) |
| 17 | { |
| 18 | struct device_node *np; |
| 19 | struct resource res; |
| 20 | unsigned long tmp = 0; |
| 21 | unsigned long l2set, l2way, l2clsz; |
| 22 | |
| 23 | if (!(__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskL2C)) |
| 24 | return -ENODEV; |
| 25 | |
| 26 | np = of_find_matching_node(NULL, atl2c_ids); |
| 27 | if (!np) |
| 28 | return -ENODEV; |
| 29 | |
| 30 | if (of_address_to_resource(np, 0, &res)) |
| 31 | return -ENODEV; |
| 32 | |
| 33 | atl2c_base = ioremap(res.start, resource_size(&res)); |
| 34 | if (!atl2c_base) |
| 35 | return -ENOMEM; |
| 36 | |
| 37 | l2set = |
| 38 | 64 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2SET) >> |
| 39 | L2_CA_CONF_offL2SET); |
| 40 | l2way = |
| 41 | 1 + |
| 42 | ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2WAY) >> |
| 43 | L2_CA_CONF_offL2WAY); |
| 44 | l2clsz = |
| 45 | 4 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2CLSZ) >> |
| 46 | L2_CA_CONF_offL2CLSZ); |
| 47 | pr_info("L2:%luKB/%luS/%luW/%luB\n", |
| 48 | l2set * l2way * l2clsz / 1024, l2set, l2way, l2clsz); |
| 49 | |
| 50 | tmp = L2C_R_REG(L2CC_PROT_OFF); |
| 51 | tmp &= ~L2CC_PROT_mskMRWEN; |
| 52 | L2C_W_REG(L2CC_PROT_OFF, tmp); |
| 53 | |
| 54 | tmp = L2C_R_REG(L2CC_SETUP_OFF); |
| 55 | tmp &= ~L2CC_SETUP_mskPART; |
| 56 | L2C_W_REG(L2CC_SETUP_OFF, tmp); |
| 57 | |
| 58 | tmp = L2C_R_REG(L2CC_CTRL_OFF); |
| 59 | tmp |= L2CC_CTRL_mskEN; |
| 60 | L2C_W_REG(L2CC_CTRL_OFF, tmp); |
| 61 | |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | subsys_initcall(atl2c_of_init); |