1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright Altera Corporation (C) 2016. All rights reserved.
4 */
5#include <linux/io.h>
6#include <linux/of.h>
7#include <linux/of_address.h>
8
9#include "core.h"
10
11/* A10 System Manager L2 ECC Control register */
12#define A10_MPU_CTRL_L2_ECC_OFST 0x0
13#define A10_MPU_CTRL_L2_ECC_EN BIT(0)
14
15/* A10 System Manager Global IRQ Mask register */
16#define A10_SYSMGR_ECC_INTMASK_CLR_OFST 0x98
17#define A10_SYSMGR_ECC_INTMASK_CLR_L2 BIT(0)
18
19/* A10 System Manager L2 ECC IRQ Clear register */
20#define A10_SYSMGR_MPU_CLEAR_L2_ECC_OFST 0xA8
21#define A10_SYSMGR_MPU_CLEAR_L2_ECC (BIT(31) | BIT(15))
22
23void socfpga_init_l2_ecc(void)
24{
25 struct device_node *np;
26 void __iomem *mapped_l2_edac_addr;
27
28 np = of_find_compatible_node(NULL, NULL, compat: "altr,socfpga-l2-ecc");
29 if (!np) {
30 pr_err("Unable to find socfpga-l2-ecc in dtb\n");
31 return;
32 }
33
34 mapped_l2_edac_addr = of_iomap(node: np, index: 0);
35 of_node_put(node: np);
36 if (!mapped_l2_edac_addr) {
37 pr_err("Unable to find L2 ECC mapping in dtb\n");
38 return;
39 }
40
41 /* Enable ECC */
42 writel(val: 0x01, addr: mapped_l2_edac_addr);
43 iounmap(addr: mapped_l2_edac_addr);
44}
45
46void socfpga_init_arria10_l2_ecc(void)
47{
48 struct device_node *np;
49 void __iomem *mapped_l2_edac_addr;
50
51 /* Find the L2 EDAC device tree node */
52 np = of_find_compatible_node(NULL, NULL, compat: "altr,socfpga-a10-l2-ecc");
53 if (!np) {
54 pr_err("Unable to find socfpga-a10-l2-ecc in dtb\n");
55 return;
56 }
57
58 mapped_l2_edac_addr = of_iomap(node: np, index: 0);
59 of_node_put(node: np);
60 if (!mapped_l2_edac_addr) {
61 pr_err("Unable to find L2 ECC mapping in dtb\n");
62 return;
63 }
64
65 if (!sys_manager_base_addr) {
66 pr_err("System Manager not mapped for L2 ECC\n");
67 goto exit;
68 }
69 /* Clear any pending IRQs */
70 writel(A10_SYSMGR_MPU_CLEAR_L2_ECC, addr: (sys_manager_base_addr +
71 A10_SYSMGR_MPU_CLEAR_L2_ECC_OFST));
72 /* Enable ECC */
73 writel(A10_SYSMGR_ECC_INTMASK_CLR_L2, addr: sys_manager_base_addr +
74 A10_SYSMGR_ECC_INTMASK_CLR_OFST);
75 writel(A10_MPU_CTRL_L2_ECC_EN, addr: mapped_l2_edac_addr +
76 A10_MPU_CTRL_L2_ECC_OFST);
77exit:
78 iounmap(addr: mapped_l2_edac_addr);
79}
80

source code of linux/arch/arm/mach-socfpga/l2_cache.c