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72 lines
1.6 KiB
72 lines
1.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/err.h> |
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#include <linux/module.h> |
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#include <linux/io.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include "hardware.h" |
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#include "common.h" |
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unsigned int __mxc_cpu_type; |
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static unsigned int imx_soc_revision; |
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void mxc_set_cpu_type(unsigned int type) |
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{ |
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__mxc_cpu_type = type; |
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} |
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void imx_set_soc_revision(unsigned int rev) |
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{ |
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imx_soc_revision = rev; |
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} |
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unsigned int imx_get_soc_revision(void) |
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{ |
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return imx_soc_revision; |
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} |
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void imx_print_silicon_rev(const char *cpu, int srev) |
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{ |
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if (srev == IMX_CHIP_REVISION_UNKNOWN) |
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pr_info("CPU identified as %s, unknown revision\n", cpu); |
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else |
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pr_info("CPU identified as %s, silicon rev %d.%d\n", |
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cpu, (srev >> 4) & 0xf, srev & 0xf); |
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} |
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void __init imx_set_aips(void __iomem *base) |
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{ |
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unsigned int reg; |
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/* |
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* Set all MPROTx to be non-bufferable, trusted for R/W, |
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* not forced to user-mode. |
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*/ |
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imx_writel(0x77777777, base + 0x0); |
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imx_writel(0x77777777, base + 0x4); |
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/* |
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* Set all OPACRx to be non-bufferable, to not require |
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* supervisor privilege level for access, allow for |
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* write access and untrusted master access. |
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*/ |
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imx_writel(0x0, base + 0x40); |
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imx_writel(0x0, base + 0x44); |
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imx_writel(0x0, base + 0x48); |
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imx_writel(0x0, base + 0x4C); |
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reg = imx_readl(base + 0x50) & 0x00FFFFFF; |
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imx_writel(reg, base + 0x50); |
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} |
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void __init imx_aips_allow_unprivileged_access( |
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const char *compat) |
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{ |
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void __iomem *aips_base_addr; |
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struct device_node *np; |
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for_each_compatible_node(np, NULL, compat) { |
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aips_base_addr = of_iomap(np, 0); |
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WARN_ON(!aips_base_addr); |
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imx_set_aips(aips_base_addr); |
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} |
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}
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