projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 3af6e292 GH |
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 = { | |
| 1944a508 Y |
12 | {.compatible = "andestech,atl2c",}, |
| 13 | {} | |
| 3af6e292 GH |
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); |