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https://github.com/Telecominfraproject/OpenCellular.git
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95673afc78
Add a function that will check the various requirements to enable USB Device Controller (UDC): - developer mode enabled - GBB flag set or VBNV flag set If VBOOT is not enabled, then default is to allow UDC enabling. BUG=b:78577893 BRANCH=poppy Change-Id: Id146ac1065f209865372aeb423f66ae734702954 Signed-off-by: Duncan Laurie <dlaurie@google.com> Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/25847 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2014 The ChromiumOS Authors. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <boot/coreboot_tables.h>
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#include <boot_device.h>
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#include <cbmem.h>
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#include <compiler.h>
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#include <console/cbmem_console.h>
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#include <console/console.h>
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#include <fmap.h>
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#include <gbb_header.h>
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#include <reset.h>
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#include <rules.h>
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#include <stddef.h>
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#include <string.h>
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#include <security/vboot/gbb.h>
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#include <security/vboot/vboot_common.h>
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#include <security/vboot/vbnv.h>
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int vboot_named_region_device(const char *name, struct region_device *rdev)
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{
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return fmap_locate_area_as_rdev(name, rdev);
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}
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int vboot_named_region_device_rw(const char *name, struct region_device *rdev)
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{
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return fmap_locate_area_as_rdev_rw(name, rdev);
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}
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/* Check if it is okay to enable USB Device Controller (UDC). */
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int vboot_can_enable_udc(void)
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{
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/* Always disable if not in developer mode */
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if (!vboot_developer_mode_enabled())
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return 0;
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/* Enable if GBB flag is set */
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if (gbb_is_flag_set(GBB_FLAG_ENABLE_UDC))
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return 1;
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/* Enable if VBNV flag is set */
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if (vbnv_udc_enable_flag())
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return 1;
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/* Otherwise disable */
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return 0;
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}
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/* ========================== VBOOT HANDOFF APIs =========================== */
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int vboot_get_handoff_info(void **addr, uint32_t *size)
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{
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/*
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* vboot_handoff is present only after cbmem comes online. If we are in
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* pre-ram stage, then bail out early.
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*/
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if (ENV_BOOTBLOCK ||
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(ENV_VERSTAGE && IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK)))
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return -1;
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struct vboot_handoff *vboot_handoff;
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vboot_handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
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if (vboot_handoff == NULL)
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return -1;
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*addr = vboot_handoff;
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if (size)
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*size = sizeof(*vboot_handoff);
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return 0;
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}
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static int vboot_get_handoff_flag(uint32_t flag)
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{
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struct vboot_handoff *vbho;
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/*
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* If vboot_handoff cannot be found, return default value of flag as 0.
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*/
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if (vboot_get_handoff_info((void **)&vbho, NULL))
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return 0;
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return !!(vbho->init_params.out_flags & flag);
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}
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int vboot_handoff_skip_display_init(void)
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{
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return !vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_DISPLAY);
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}
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int vboot_handoff_check_developer_flag(void)
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{
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return vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_DEVELOPER);
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}
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int vboot_handoff_check_recovery_flag(void)
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{
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return vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_RECOVERY);
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}
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int vboot_handoff_get_recovery_reason(void)
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{
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struct vboot_handoff *vbho;
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VbSharedDataHeader *sd;
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if (vboot_get_handoff_info((void **)&vbho, NULL))
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return 0;
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sd = (VbSharedDataHeader *)vbho->shared_data;
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return sd->recovery_reason;
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}
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/* ============================ VBOOT REBOOT ============================== */
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void __weak vboot_platform_prepare_reboot(void)
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{
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}
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void vboot_reboot(void)
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{
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if (IS_ENABLED(CONFIG_CONSOLE_CBMEM_DUMP_TO_UART))
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cbmem_dump_console();
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vboot_platform_prepare_reboot();
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hard_reset();
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die("failed to reboot");
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}
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