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https://github.com/AsahiLinux/u-boot
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101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
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/*
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* Copyright (C) 2013 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <common.h>
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#include <stdio_dev.h>
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#include <linux/ctype.h>
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#include <linux/types.h>
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#include <asm/global_data.h>
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#include <libfdt.h>
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#include <fdt_support.h>
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#include <asm/armv7.h>
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#include <asm/psci.h>
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static int fdt_psci(void *fdt)
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{
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#ifdef CONFIG_ARMV7_PSCI
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int nodeoff;
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int tmp;
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nodeoff = fdt_path_offset(fdt, "/cpus");
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if (nodeoff < 0) {
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printf("couldn't find /cpus\n");
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return nodeoff;
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}
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/* add 'enable-method = "psci"' to each cpu node */
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for (tmp = fdt_first_subnode(fdt, nodeoff);
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tmp >= 0;
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tmp = fdt_next_subnode(fdt, tmp)) {
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const struct fdt_property *prop;
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int len;
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prop = fdt_get_property(fdt, tmp, "device_type", &len);
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if (!prop)
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continue;
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if (len < 4)
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continue;
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if (strcmp(prop->data, "cpu"))
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continue;
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fdt_setprop_string(fdt, tmp, "enable-method", "psci");
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}
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nodeoff = fdt_path_offset(fdt, "/psci");
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if (nodeoff < 0) {
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nodeoff = fdt_path_offset(fdt, "/");
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if (nodeoff < 0)
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return nodeoff;
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nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
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if (nodeoff < 0)
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return nodeoff;
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}
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tmp = fdt_setprop_string(fdt, nodeoff, "compatible", "arm,psci");
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if (tmp)
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return tmp;
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tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
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if (tmp)
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return tmp;
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tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_suspend", ARM_PSCI_FN_CPU_SUSPEND);
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if (tmp)
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return tmp;
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tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_off", ARM_PSCI_FN_CPU_OFF);
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if (tmp)
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return tmp;
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tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_on", ARM_PSCI_FN_CPU_ON);
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if (tmp)
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return tmp;
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tmp = fdt_setprop_u32(fdt, nodeoff, "migrate", ARM_PSCI_FN_MIGRATE);
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if (tmp)
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return tmp;
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#endif
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return 0;
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}
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int armv7_update_dt(void *fdt)
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{
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#ifndef CONFIG_ARMV7_SECURE_BASE
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/* secure code lives in RAM, keep it alive */
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fdt_add_mem_rsv(fdt, (unsigned long)__secure_start,
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__secure_end - __secure_start);
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#endif
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return fdt_psci(fdt);
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}
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