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202 lines
7.1 KiB
202 lines
7.1 KiB
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Tests for firmware NV storage library.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "test_common.h"
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#include "vboot_common.h"
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#include "2api.h"
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#include "2common.h"
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#include "2misc.h"
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#include "2nvstorage.h"
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/* Single NV storage field to test */
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struct nv_field {
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enum vb2_nv_param param; /* Parameter index */
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uint32_t default_value; /* Expected default value */
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uint32_t test_value; /* Value to test writing */
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uint32_t test_value2; /* Second value to test writing */
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char *desc; /* Field description */
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};
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/* Array of fields to test, terminated with a field with desc==NULL. */
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static struct nv_field nvfields[] = {
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{VB2_NV_DEBUG_RESET_MODE, 0, 1, 0, "debug reset mode"},
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{VB2_NV_TRY_NEXT, 0, 1, 0, "try next"},
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{VB2_NV_TRY_COUNT, 0, 6, 15, "try B count"},
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{VB2_NV_FW_TRIED, 0, 1, 0, "firmware tried"},
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{VB2_NV_FW_RESULT, 0, 1, 2, "firmware result"},
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{VB2_NV_FW_PREV_TRIED, 0, 1, 0, "firmware prev tried"},
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{VB2_NV_FW_PREV_RESULT, 0, 1, 3, "firmware prev result"},
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{VB2_NV_RECOVERY_REQUEST, 0, 0x42, 0xED, "recovery request"},
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{VB2_NV_RECOVERY_SUBCODE, 0, 0x56, 0xAC, "recovery subcode"},
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{VB2_NV_LOCALIZATION_INDEX, 0, 0x69, 0xB0, "localization index"},
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{VB2_NV_KERNEL_FIELD, 0, 0x12345678, 0xFEDCBA98, "kernel field"},
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{VB2_NV_DEV_BOOT_USB, 0, 1, 0, "dev boot usb"},
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{VB2_NV_DEV_BOOT_LEGACY, 0, 1, 0, "dev boot legacy"},
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{VB2_NV_DEV_BOOT_SIGNED_ONLY, 0, 1, 0, "dev boot custom"},
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{VB2_NV_DISABLE_DEV_REQUEST, 0, 1, 0, "disable dev request"},
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{VB2_NV_CLEAR_TPM_OWNER_REQUEST, 0, 1, 0, "clear tpm owner request"},
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{VB2_NV_CLEAR_TPM_OWNER_DONE, 0, 1, 0, "clear tpm owner done"},
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{VB2_NV_OPROM_NEEDED, 0, 1, 0, "oprom needed"},
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{VB2_NV_BACKUP_NVRAM_REQUEST, 0, 1, 0, "backup nvram request"},
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{0, 0, 0, 0, NULL}
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};
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static void test_changed(struct vb2_context *ctx, int changed, const char *why)
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{
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if (changed)
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TEST_NEQ(ctx->flags & VB2_CONTEXT_NVDATA_CHANGED, 0, why);
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else
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TEST_EQ(ctx->flags & VB2_CONTEXT_NVDATA_CHANGED, 0, why);
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};
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static void nv_storage_test(void)
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{
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struct nv_field *vnf;
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uint8_t goodcrc;
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uint8_t workbuf[VB2_WORKBUF_RECOMMENDED_SIZE]
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__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
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struct vb2_context c = {
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.flags = 0,
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.workbuf = workbuf,
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.workbuf_size = sizeof(workbuf),
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};
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struct vb2_shared_data *sd = vb2_get_sd(&c);
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memset(c.nvdata, 0xA6, sizeof(c.nvdata));
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vb2_init_context(&c);
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/* Init with invalid data should set defaults and regenerate CRC */
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vb2_nv_init(&c);
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TEST_EQ(c.nvdata[0], 0x70, "vb2_nv_init() reset header byte");
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TEST_NEQ(c.nvdata[15], 0, "vb2_nv_init() CRC");
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TEST_EQ(sd->status, VB2_SD_STATUS_NV_INIT | VB2_SD_STATUS_NV_REINIT,
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"vb2_nv_init() status changed");
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test_changed(&c, 1, "vb2_nv_init() reset changed");
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goodcrc = c.nvdata[15];
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TEST_SUCC(vb2_nv_check_crc(&c), "vb2_nv_check_crc() good");
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/* Another init should not cause further changes */
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c.flags = 0;
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sd->status = 0;
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vb2_nv_init(&c);
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test_changed(&c, 0, "vb2_nv_init() didn't re-reset");
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TEST_EQ(c.nvdata[15], goodcrc, "vb2_nv_init() CRC same");
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TEST_EQ(sd->status, VB2_SD_STATUS_NV_INIT, "vb2_nv_init() status same");
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/* Perturbing the header should force defaults */
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c.nvdata[0] ^= 0x40;
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TEST_EQ(vb2_nv_check_crc(&c),
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VB2_ERROR_NV_HEADER, "vb2_nv_check_crc() bad header");
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vb2_nv_init(&c);
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TEST_EQ(c.nvdata[0], 0x70, "vb2_nv_init() reset header byte again");
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test_changed(&c, 1, "vb2_nv_init() corrupt changed");
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TEST_EQ(c.nvdata[15], goodcrc, "vb2_nv_init() CRC same again");
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/* So should perturbing some other byte */
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TEST_EQ(c.nvdata[11], 0, "Kernel byte starts at 0");
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c.nvdata[11] = 12;
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TEST_EQ(vb2_nv_check_crc(&c),
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VB2_ERROR_NV_CRC, "vb2_nv_check_crc() bad CRC");
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vb2_nv_init(&c);
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TEST_EQ(c.nvdata[11], 0, "vb2_nv_init() reset kernel byte");
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test_changed(&c, 1, "vb2_nv_init() corrupt elsewhere changed");
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TEST_EQ(c.nvdata[15], goodcrc, "vb2_nv_init() CRC same again");
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/* Clear the kernel and firmware flags */
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vb2_nv_init(&c);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_FIRMWARE_SETTINGS_RESET),
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1, "Firmware settings are reset");
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vb2_nv_set(&c, VB2_NV_FIRMWARE_SETTINGS_RESET, 0);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_FIRMWARE_SETTINGS_RESET),
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0, "Firmware settings are clear");
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TEST_EQ(vb2_nv_get(&c, VB2_NV_KERNEL_SETTINGS_RESET),
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1, "Kernel settings are reset");
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vb2_nv_set(&c, VB2_NV_KERNEL_SETTINGS_RESET, 0);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_KERNEL_SETTINGS_RESET),
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0, "Kernel settings are clear");
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TEST_EQ(c.nvdata[0], 0x40, "Header byte now just has the header bit");
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/* That should have changed the CRC */
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TEST_NEQ(c.nvdata[15], goodcrc,
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"vb2_nv_init() CRC changed due to flags clear");
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/* Test explicitly setting the reset flags again */
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vb2_nv_init(&c);
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vb2_nv_set(&c, VB2_NV_FIRMWARE_SETTINGS_RESET, 1);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_FIRMWARE_SETTINGS_RESET),
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1, "Firmware settings forced reset");
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vb2_nv_set(&c, VB2_NV_FIRMWARE_SETTINGS_RESET, 0);
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vb2_nv_set(&c, VB2_NV_KERNEL_SETTINGS_RESET, 1);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_KERNEL_SETTINGS_RESET),
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1, "Kernel settings forced reset");
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vb2_nv_set(&c, VB2_NV_KERNEL_SETTINGS_RESET, 0);
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/* Get/set an invalid field */
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vb2_nv_init(&c);
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vb2_nv_set(&c, -1, 1);
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TEST_EQ(vb2_nv_get(&c, -1), 0, "Get invalid setting");
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/* Test other fields */
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vb2_nv_init(&c);
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for (vnf = nvfields; vnf->desc; vnf++) {
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TEST_EQ(vb2_nv_get(&c, vnf->param), vnf->default_value,
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vnf->desc);
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vb2_nv_set(&c, vnf->param, vnf->test_value);
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TEST_EQ(vb2_nv_get(&c, vnf->param), vnf->test_value, vnf->desc);
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vb2_nv_set(&c, vnf->param, vnf->test_value2);
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TEST_EQ(vb2_nv_get(&c, vnf->param), vnf->test_value2,
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vnf->desc);
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}
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/* None of those changes should have caused a reset to defaults */
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vb2_nv_init(&c);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_FIRMWARE_SETTINGS_RESET),
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0, "Firmware settings are still clear");
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TEST_EQ(vb2_nv_get(&c, VB2_NV_KERNEL_SETTINGS_RESET),
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0, "Kernel settings are still clear");
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/* Writing identical settings doesn't cause the CRC to regenerate */
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c.flags = 0;
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vb2_nv_init(&c);
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test_changed(&c, 0, "No regen CRC on open");
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for (vnf = nvfields; vnf->desc; vnf++)
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vb2_nv_set(&c, vnf->param, vnf->test_value2);
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test_changed(&c, 0, "No regen CRC if data not changed");
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/* Test out-of-range fields mapping to defaults or failing */
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vb2_nv_init(&c);
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vb2_nv_set(&c, VB2_NV_TRY_COUNT, 16);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_TRY_COUNT),
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15, "Try b count out of range");
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vb2_nv_set(&c, VB2_NV_RECOVERY_REQUEST, 0x101);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_RECOVERY_REQUEST),
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VB2_RECOVERY_LEGACY, "Recovery request out of range");
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vb2_nv_set(&c, VB2_NV_LOCALIZATION_INDEX, 0x102);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_LOCALIZATION_INDEX),
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0, "Localization index out of range");
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vb2_nv_set(&c, VB2_NV_FW_RESULT, VB2_FW_RESULT_UNKNOWN + 1);
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vb2_nv_set(&c, VB2_NV_FW_RESULT, VB2_FW_RESULT_UNKNOWN + 100);
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TEST_EQ(vb2_nv_get(&c, VB2_NV_FW_RESULT),
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VB2_FW_RESULT_UNKNOWN, "Firmware result out of range");
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}
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int main(int argc, char* argv[])
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{
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nv_storage_test();
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return gTestSuccess ? 0 : 255;
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}
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