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