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 mxc_set_cpu_type(unsigned int type)14 void mxc_set_cpu_type(unsigned int type) 15 { 16 __mxc_cpu_type = type; 17 } 18 imx_set_soc_revision(unsigned int rev)19 void imx_set_soc_revision(unsigned int rev) 20 { 21 imx_soc_revision = rev; 22 } 23 imx_get_soc_revision(void)24 unsigned int imx_get_soc_revision(void) 25 { 26 return imx_soc_revision; 27 } 28 imx_print_silicon_rev(const char * cpu,int srev)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 imx_set_aips(void __iomem * base)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 imx_aips_allow_unprivileged_access(const char * compat)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(np, 0); 69 WARN_ON(!aips_base_addr); 70 imx_set_aips(aips_base_addr); 71 } 72 } 73