72 lines
1.8 KiB
C
72 lines
1.8 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 const struct sbi_system_reset_device *reset_dev = NULL;
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const struct sbi_system_reset_device *sbi_system_reset_get_device(void)
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{
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return reset_dev;
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}
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void sbi_system_reset_set_device(const struct sbi_system_reset_device *dev)
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{
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if (!dev || reset_dev)
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return;
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reset_dev = dev;
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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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if (reset_dev && reset_dev->system_reset_check &&
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reset_dev->system_reset_check(reset_type, reset_reason))
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return TRUE;
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return FALSE;
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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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reset_dev && reset_dev->system_reset)
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reset_dev->system_reset(reset_type, reset_reason);
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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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