u-boot/arch/arm/lib/psci-dt.c
Masahiro Yamada b08c8c4870 libfdt: move headers to <linux/libfdt.h> and <linux/libfdt_env.h>
Thomas reported U-Boot failed to build host tools if libfdt-devel
package is installed because tools include libfdt headers from
/usr/include/ instead of using internal ones.

This commit moves the header code:
  include/libfdt.h         -> include/linux/libfdt.h
  include/libfdt_env.h     -> include/linux/libfdt_env.h

and replaces include directives:
  #include <libfdt.h>      -> #include <linux/libfdt.h>
  #include <libfdt_env.h>  -> #include <linux/libfdt_env.h>

Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-03-05 10:16:28 -05:00

120 lines
2.7 KiB
C

/*
* Copyright 2016 NXP Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
#include <linux/sizes.h>
#include <linux/kernel.h>
#include <asm/psci.h>
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
#include <asm/armv8/sec_firmware.h>
#endif
int fdt_psci(void *fdt)
{
#if defined(CONFIG_ARMV7_PSCI) || defined(CONFIG_ARMV8_PSCI) || \
defined(CONFIG_SEC_FIRMWARE_ARMV8_PSCI)
int nodeoff;
unsigned int psci_ver = 0;
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;
/*
* Not checking rv here, our approach is to skip over errors in
* individual cpu nodes, hopefully some of the nodes are
* processed correctly and those will boot
*/
fdt_setprop_string(fdt, tmp, "enable-method", "psci");
}
nodeoff = fdt_path_offset(fdt, "/psci");
if (nodeoff >= 0)
goto init_psci_node;
nodeoff = fdt_path_offset(fdt, "/");
if (nodeoff < 0)
return nodeoff;
nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
if (nodeoff < 0)
return nodeoff;
init_psci_node:
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
psci_ver = sec_firmware_support_psci_version();
#elif defined(CONFIG_ARMV7_PSCI_1_0) || defined(CONFIG_ARMV8_PSCI)
psci_ver = ARM_PSCI_VER_1_0;
#endif
if (psci_ver >= ARM_PSCI_VER_1_0) {
tmp = fdt_setprop_string(fdt, nodeoff,
"compatible", "arm,psci-1.0");
if (tmp)
return tmp;
}
if (psci_ver >= ARM_PSCI_VER_0_2) {
tmp = fdt_appendprop_string(fdt, nodeoff,
"compatible", "arm,psci-0.2");
if (tmp)
return tmp;
}
#ifndef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
/*
* The Secure firmware framework isn't able to support PSCI version 0.1.
*/
if (psci_ver < ARM_PSCI_VER_0_2) {
tmp = fdt_appendprop_string(fdt, nodeoff,
"compatible", "arm,psci");
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
tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
if (tmp)
return tmp;
#endif
return 0;
}