u-boot/board/armltd/vexpress/vexpress_tc2.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

84 lines
2.1 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2016 Linaro
* Jon Medhurst <tixy@linaro.org>
*
* TC2 specific code for Versatile Express.
*/
#include <asm/armv7.h>
#include <asm/io.h>
#include <asm/u-boot.h>
#include <common.h>
#include <linux/libfdt.h>
#define SCC_BASE 0x7fff0000
bool armv7_boot_nonsec_default(void)
{
#ifdef CONFIG_ARMV7_BOOT_SEC_DEFAULT
return false;
#else
/*
* The Serial Configuration Controller (SCC) register at address 0x700
* contains flags for configuring the behaviour of the Boot Monitor
* (which CPUs execute from reset). Two of these bits are of interest:
*
* bit 12 = Use per-cpu mailboxes for power management
* bit 13 = Power down the non-boot cluster
*
* It is only when both of these are false that U-Boot's current
* implementation of 'nonsec' mode can work as expected because we
* rely on getting all CPUs to execute _nonsec_init, so let's check that.
*/
return (readl((u32 *)(SCC_BASE + 0x700)) & ((1 << 12) | (1 << 13))) == 0;
#endif
}
#ifdef CONFIG_OF_BOARD_SETUP
int ft_board_setup(void *fdt, bd_t *bd)
{
int offset, tmp, len;
const struct fdt_property *prop;
const char *cci_compatible = "arm,cci-400-ctrl-if";
#ifdef CONFIG_ARMV7_NONSEC
if (!armv7_boot_nonsec())
return 0;
#else
return 0;
#endif
/* Booting in nonsec mode, disable CCI access */
offset = fdt_path_offset(fdt, "/cpus");
if (offset < 0) {
printf("couldn't find /cpus\n");
return offset;
}
/* delete cci-control-port in each cpu node */
for (tmp = fdt_first_subnode(fdt, offset); tmp >= 0;
tmp = fdt_next_subnode(fdt, tmp))
fdt_delprop(fdt, tmp, "cci-control-port");
/* disable all ace cci slave ports */
offset = fdt_node_offset_by_prop_value(fdt, offset, "compatible",
cci_compatible, 20);
while (offset > 0) {
prop = fdt_get_property(fdt, offset, "interface-type",
&len);
if (!prop)
continue;
if (len < 4)
continue;
if (strcmp(prop->data, "ace"))
continue;
fdt_setprop_string(fdt, offset, "status", "disabled");
offset = fdt_node_offset_by_prop_value(fdt, offset, "compatible",
cci_compatible, 20);
}
return 0;
}
#endif /* CONFIG_OF_BOARD_SETUP */