forked from Mirrors/opensbi
516161c46f
To support different handlers for different types of resets, we are adding a sbi_list of restart handlers. Instead of sbi_system_reset_set_device we use sbi_system_reset_add_device to reflect the actual meaning. Signed-off-by: Nikita Shubin <n.shubin@yadro.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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* Nick Kossifidis <mick@ics.forth.gr>
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*/
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#include <sbi/riscv_asm.h>
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#include <sbi/sbi_bitops.h>
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#include <sbi/sbi_domain.h>
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#include <sbi/sbi_hart.h>
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#include <sbi/sbi_hsm.h>
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#include <sbi/sbi_platform.h>
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#include <sbi/sbi_system.h>
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#include <sbi/sbi_ipi.h>
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#include <sbi/sbi_init.h>
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static SBI_LIST_HEAD(reset_devices_list);
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const struct sbi_system_reset_device *sbi_system_reset_get_device(
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u32 reset_type, u32 reset_reason)
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{
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struct sbi_system_reset_device *dev = 0;
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struct sbi_dlist *pos;
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/* Check each reset device registered for supported reset type */
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sbi_list_for_each(pos, &(reset_devices_list)) {
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dev = to_system_reset_device(pos);
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if (dev->system_reset_check &&
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dev->system_reset_check(reset_type, reset_reason))
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break;
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}
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return dev;
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}
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void sbi_system_reset_add_device(struct sbi_system_reset_device *dev)
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{
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if (!dev || !dev->system_reset_check)
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return;
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sbi_list_add(&(dev->node), &(reset_devices_list));
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}
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bool sbi_system_reset_supported(u32 reset_type, u32 reset_reason)
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{
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return !!sbi_system_reset_get_device(reset_type, reset_reason);
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}
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void __noreturn sbi_system_reset(u32 reset_type, u32 reset_reason)
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{
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ulong hbase = 0, hmask;
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u32 cur_hartid = current_hartid();
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struct sbi_domain *dom = sbi_domain_thishart_ptr();
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struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
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/* Send HALT IPI to every hart other than the current hart */
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while (!sbi_hsm_hart_interruptible_mask(dom, hbase, &hmask)) {
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if (hbase <= cur_hartid)
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hmask &= ~(1UL << (cur_hartid - hbase));
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if (hmask)
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sbi_ipi_send_halt(hmask, hbase);
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hbase += BITS_PER_LONG;
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}
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/* Stop current HART */
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sbi_hsm_hart_stop(scratch, FALSE);
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/* Platform specific reset if domain allowed system reset */
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if (dom->system_reset_allowed) {
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const struct sbi_system_reset_device *dev =
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sbi_system_reset_get_device(reset_type, reset_reason);
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if (dev)
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dev->system_reset(reset_type, reset_reason);
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}
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/* If platform specific reset did not work then do sbi_exit() */
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sbi_exit(scratch);
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}
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