134 lines
3.4 KiB
C
134 lines
3.4 KiB
C
/*
|
|
* Copyright (C) 2013 - ARM Ltd
|
|
* Author: Marc Zyngier <marc.zyngier@arm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <stdio_dev.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/types.h>
|
|
#include <asm/global_data.h>
|
|
#include <libfdt.h>
|
|
#include <fdt_support.h>
|
|
#include <asm/armv7.h>
|
|
#include <asm/psci.h>
|
|
|
|
static int fdt_psci(void *fdt)
|
|
{
|
|
#ifdef CONFIG_ARMV7_PSCI
|
|
int nodeoff;
|
|
int tmp;
|
|
|
|
nodeoff = fdt_path_offset(fdt, "/cpus");
|
|
if (nodeoff < 0) {
|
|
printf("couldn't find /cpus\n");
|
|
return nodeoff;
|
|
}
|
|
|
|
/* add 'enable-method = "psci"' to each cpu node */
|
|
for (tmp = fdt_first_subnode(fdt, nodeoff);
|
|
tmp >= 0;
|
|
tmp = fdt_next_subnode(fdt, tmp)) {
|
|
const struct fdt_property *prop;
|
|
int len;
|
|
|
|
prop = fdt_get_property(fdt, tmp, "device_type", &len);
|
|
if (!prop)
|
|
continue;
|
|
if (len < 4)
|
|
continue;
|
|
if (strcmp(prop->data, "cpu"))
|
|
continue;
|
|
|
|
fdt_setprop_string(fdt, tmp, "enable-method", "psci");
|
|
}
|
|
|
|
nodeoff = fdt_path_offset(fdt, "/psci");
|
|
if (nodeoff < 0) {
|
|
nodeoff = fdt_path_offset(fdt, "/");
|
|
if (nodeoff < 0)
|
|
return nodeoff;
|
|
|
|
nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
|
|
if (nodeoff < 0)
|
|
return nodeoff;
|
|
}
|
|
|
|
tmp = fdt_setprop_string(fdt, nodeoff, "compatible", "arm,psci");
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_suspend", ARM_PSCI_FN_CPU_SUSPEND);
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_off", ARM_PSCI_FN_CPU_OFF);
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_on", ARM_PSCI_FN_CPU_ON);
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_u32(fdt, nodeoff, "migrate", ARM_PSCI_FN_MIGRATE);
|
|
if (tmp)
|
|
return tmp;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int armv7_apply_memory_carveout(u64 *start, u64 *size)
|
|
{
|
|
#ifdef CONFIG_ARMV7_SECURE_RESERVE_SIZE
|
|
if (*start + *size < CONFIG_ARMV7_SECURE_BASE ||
|
|
*start >= (u64)CONFIG_ARMV7_SECURE_BASE +
|
|
CONFIG_ARMV7_SECURE_RESERVE_SIZE)
|
|
return 0;
|
|
|
|
/* carveout must be at the beginning or the end of the bank */
|
|
if (*start == CONFIG_ARMV7_SECURE_BASE ||
|
|
*start + *size == (u64)CONFIG_ARMV7_SECURE_BASE +
|
|
CONFIG_ARMV7_SECURE_RESERVE_SIZE) {
|
|
if (*size < CONFIG_ARMV7_SECURE_RESERVE_SIZE) {
|
|
debug("Secure monitor larger than RAM bank!?\n");
|
|
return -EINVAL;
|
|
}
|
|
*size -= CONFIG_ARMV7_SECURE_RESERVE_SIZE;
|
|
if (*start == CONFIG_ARMV7_SECURE_BASE)
|
|
*start += CONFIG_ARMV7_SECURE_RESERVE_SIZE;
|
|
return 0;
|
|
}
|
|
debug("Secure monitor not located at beginning or end of RAM bank\n");
|
|
return -EINVAL;
|
|
#else /* !CONFIG_ARMV7_SECURE_RESERVE_SIZE */
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
int psci_update_dt(void *fdt)
|
|
{
|
|
#ifdef CONFIG_ARMV7_NONSEC
|
|
if (!armv7_boot_nonsec())
|
|
return 0;
|
|
#endif
|
|
#ifndef CONFIG_ARMV7_SECURE_BASE
|
|
/* secure code lives in RAM, keep it alive */
|
|
fdt_add_mem_rsv(fdt, (unsigned long)__secure_start,
|
|
__secure_end - __secure_start);
|
|
#endif
|
|
|
|
return fdt_psci(fdt);
|
|
}
|