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https://github.com/riscv-software-src/opensbi.git
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5c429ae213
To implement the SBI SRST extension, we need two platform operations for system reset: 1) system_reset_check() - This operation will check whether given reset type and reason are supported by the platform 2) system_reset() - This operation will do the actual platform system reset and it will not return if reset type and reason are supported by the platform This patch updates system reset related code everywhere as-per above. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 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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*/
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#include <sbi/sbi_scratch.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/reset/fdt_reset.h>
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extern struct fdt_reset fdt_reset_sifive;
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extern struct fdt_reset fdt_reset_htif;
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static struct fdt_reset *reset_drivers[] = {
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&fdt_reset_sifive,
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&fdt_reset_htif,
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};
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static struct fdt_reset *current_driver = NULL;
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int fdt_system_reset_check(u32 reset_type, u32 reset_reason)
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{
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if (current_driver && current_driver->system_reset_check)
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return current_driver->system_reset_check(reset_type,
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reset_reason);
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return 0;
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}
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void fdt_system_reset(u32 reset_type, u32 reset_reason)
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{
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if (current_driver && current_driver->system_reset)
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current_driver->system_reset(reset_type, reset_reason);
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}
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int fdt_reset_init(void)
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{
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int pos, noff, rc;
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struct fdt_reset *drv;
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const struct fdt_match *match;
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void *fdt = sbi_scratch_thishart_arg1_ptr();
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for (pos = 0; pos < array_size(reset_drivers); pos++) {
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drv = reset_drivers[pos];
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noff = fdt_find_match(fdt, -1, drv->match_table, &match);
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if (noff < 0)
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continue;
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if (drv->init) {
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rc = drv->init(fdt, noff, match);
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if (rc)
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return rc;
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}
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current_driver = drv;
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break;
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}
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return 0;
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}
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