1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/err.h> |
3 | #include <linux/module.h> |
4 | #include <linux/io.h> |
5 | #include <linux/of.h> |
6 | #include <linux/of_address.h> |
7 | |
8 | #include "hardware.h" |
9 | #include "common.h" |
10 | |
11 | unsigned int __mxc_cpu_type; |
12 | static unsigned int imx_soc_revision; |
13 | |
14 | void mxc_set_cpu_type(unsigned int type) |
15 | { |
16 | __mxc_cpu_type = type; |
17 | } |
18 | |
19 | void imx_set_soc_revision(unsigned int rev) |
20 | { |
21 | imx_soc_revision = rev; |
22 | } |
23 | |
24 | unsigned int imx_get_soc_revision(void) |
25 | { |
26 | return imx_soc_revision; |
27 | } |
28 | |
29 | void imx_print_silicon_rev(const char *cpu, int srev) |
30 | { |
31 | if (srev == IMX_CHIP_REVISION_UNKNOWN) |
32 | pr_info("CPU identified as %s, unknown revision\n" , cpu); |
33 | else |
34 | pr_info("CPU identified as %s, silicon rev %d.%d\n" , |
35 | cpu, (srev >> 4) & 0xf, srev & 0xf); |
36 | } |
37 | |
38 | void __init imx_set_aips(void __iomem *base) |
39 | { |
40 | unsigned int reg; |
41 | /* |
42 | * Set all MPROTx to be non-bufferable, trusted for R/W, |
43 | * not forced to user-mode. |
44 | */ |
45 | imx_writel(0x77777777, base + 0x0); |
46 | imx_writel(0x77777777, base + 0x4); |
47 | |
48 | /* |
49 | * Set all OPACRx to be non-bufferable, to not require |
50 | * supervisor privilege level for access, allow for |
51 | * write access and untrusted master access. |
52 | */ |
53 | imx_writel(0x0, base + 0x40); |
54 | imx_writel(0x0, base + 0x44); |
55 | imx_writel(0x0, base + 0x48); |
56 | imx_writel(0x0, base + 0x4C); |
57 | reg = imx_readl(base + 0x50) & 0x00FFFFFF; |
58 | imx_writel(reg, base + 0x50); |
59 | } |
60 | |
61 | void __init imx_aips_allow_unprivileged_access( |
62 | const char *compat) |
63 | { |
64 | void __iomem *aips_base_addr; |
65 | struct device_node *np; |
66 | |
67 | for_each_compatible_node(np, NULL, compat) { |
68 | aips_base_addr = of_iomap(node: np, index: 0); |
69 | WARN_ON(!aips_base_addr); |
70 | imx_set_aips(base: aips_base_addr); |
71 | } |
72 | } |
73 | |