mirror of
https://github.com/tillitis/tillitis-key1.git
synced 2025-07-04 02:46:49 -04:00
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
// Copyright (C) 2025 - Tillitis AB
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// SPDX-License-Identifier: GPL-2.0-only
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#include <stdint.h>
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#include <tkey/assert.h>
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#include <tkey/lib.h>
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#include <tkey/tk1_mem.h>
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#include "reset.h"
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// clang-format off
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static volatile uint32_t *system_reset = (volatile uint32_t *)TK1_MMIO_TK1_SYSTEM_RESET;
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static volatile struct reset *resetinfo = (volatile struct reset *)TK1_MMIO_RESETINFO_BASE;
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// clang-format on
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int reset(struct reset *userreset, size_t nextlen)
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{
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if ((uint32_t)userreset < TK1_RAM_BASE ||
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(uint32_t)userreset >= TK1_RAM_BASE + TK1_RAM_SIZE) {
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return -1;
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}
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if (nextlen > sizeof(resetinfo->next_app_data)) {
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return -1;
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}
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(void)memset((void *)resetinfo, 0, sizeof(*resetinfo));
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resetinfo->type = userreset->type;
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memcpy((void *)resetinfo->app_digest, userreset->app_digest,
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sizeof(resetinfo->app_digest));
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memcpy((void *)resetinfo->next_app_data, userreset->next_app_data,
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nextlen);
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// Do the actual reset.
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*system_reset = 1;
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// Should not be reached.
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assert(1 == 2);
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__builtin_unreachable();
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}
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int reset_data(uint8_t *next_app_data)
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{
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if ((uint32_t)next_app_data < TK1_RAM_BASE ||
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(uint32_t)next_app_data >= TK1_RAM_BASE + TK1_RAM_SIZE) {
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return -1;
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}
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if ((uint32_t)next_app_data + RESET_DATA_SIZE >
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TK1_RAM_BASE + TK1_RAM_SIZE) {
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return -1;
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}
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memcpy(next_app_data, (void *)resetinfo->next_app_data,
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RESET_DATA_SIZE);
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return 0;
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}
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