1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/module.h>
6 #include <linux/of_address.h>
11 unsigned int __mxc_cpu_type;
12 static unsigned int imx_soc_revision;
14 void mxc_set_cpu_type(unsigned int type)
16 __mxc_cpu_type = type;
19 void imx_set_soc_revision(unsigned int rev)
21 imx_soc_revision = rev;
24 unsigned int imx_get_soc_revision(void)
26 return imx_soc_revision;
29 void imx_print_silicon_rev(const char *cpu, int srev)
31 if (srev == IMX_CHIP_REVISION_UNKNOWN)
32 pr_info("CPU identified as %s, unknown revision\n", cpu);
34 pr_info("CPU identified as %s, silicon rev %d.%d\n",
35 cpu, (srev >> 4) & 0xf, srev & 0xf);
38 void __init imx_set_aips(void __iomem *base)
42 * Set all MPROTx to be non-bufferable, trusted for R/W,
43 * not forced to user-mode.
45 imx_writel(0x77777777, base + 0x0);
46 imx_writel(0x77777777, base + 0x4);
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.
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);
61 void __init imx_aips_allow_unprivileged_access(
64 void __iomem *aips_base_addr;
65 struct device_node *np;
67 for_each_compatible_node(np, NULL, compat) {
68 aips_base_addr = of_iomap(np, 0);
69 WARN_ON(!aips_base_addr);
70 imx_set_aips(aips_base_addr);