BOOT METHOD AND BOOT SYSTEM

• US 20150074386A1
• Filed: 09/09/2014
• Published: 03/12/2015
• Est. Priority Date: 09/09/2013
• Status: Active Grant

• Current Assignee: Insyde Software Corp
• Original Assignee: Insyde Software Corp
• Inventors: HUANG, Yi Fang, CHANG, Chao Ming, TSAI, Yu Chieh
• Granted Patent: US 9,507,604 B2
• Time in Patent Office: Days
• US Class Current: 713/2
• CPC Class Codes: G06F 9/4401 Bootstrapping security arrangements therefor G06F21/57

Abstract

A boot method for a platform system including a Universal Extensible Firmware Interface (UEFI) Basic Input/Output System (BIOS) is provided. The UEFI BIOS includes partitions storing an initial boot program code, a factory setting boot program code, a first customized boot program code, a second customized boot program code and boot information respectively. The provided method comprises steps of: loading the initial boot program code stored in one of the partitions of the UEFI BIOS into a memory, and executing the initial boot program code stored in the memory by a CPU to perform a first phase of boot; and loading one of the factory setting boot program code, the first customized boot program code and the second customized boot program code stored in the partitions of the UEFI BIOS into the memory according to data in the boot information, and executing the program code loaded in the memory to perform a second phase of boot by the CPU.

Claims

1. A boot method for a platform system including a Universal Extensible Firmware Interface (UEFI) Basic Input/Output System (BIOS), the UEFI BIOS having partitions storing an initial boot program code, a factory setting boot program code, a first customized boot program code, a second customized boot program code and boot information respectively, the method comprising steps of:

(a) loading the initial boot program code stored in one of the partitions of the UEFI BIOS into a memory, and executing the initial boot program code stored in the memory by a CPU to perform a first phase of boot; and

(b) loading one of the factory setting boot program code, the first customized boot program code and the second customized boot program code stored in the partitions of the UEFI BIOS into the memory according to data in the boot information, and executing the program code loaded in the memory to perform a second phase of boot by the CPU.

2. The boot method according to claim 1, wherein the step of (b) comprises steps of:

loading the first customized boot program code stored in one of the partitions of the UEFI BIOS into the memory if a first flag in the boot information and corresponding to the first customized boot program code is set to bootable, and executing the first customized boot program code stored in the memory to perform the second phase of boot by the CPU;

loading the second customized boot program code stored in one of the partitions of the UEFI BIOS into the memory if a second flag in the boot information and corresponding to the second customized boot program code is set to bootable, and executing the second customized boot program code in the memory to perform the second phase of boot by the CPU; and

loading the factory setting boot program code stored in one of the partitions of the UEFI BIOS into the memory if none of the first and the second flags is set to bootable, and executing the factory setting boot program code in the memory to perform the second phase of boot by the CPU.

3. The boot method according to claim 1, wherein a security phase program code and a Pre-Extensible Firmware Interface Initialization (PEI) phase program code in the memory are executed by the CPU to perform the first phase of boot;

and

a Driver Execution Environment (DXE) phase program code and a Boot Device Selection (BDS) phase program code in the memory are executed by the CPU to perform the second phase of boot.

4. A boot method for a platform system including a UEFI BIOS, the UEFI BIOS having partitions storing an initial boot program code, a factory setting boot program code, a first customized boot program code, a second customized boot program code and boot information respectively, the method comprising steps of:

(c) loading a program code of system firmware file into a memory;

(d) determining which one of the partitions storing the first and the second customized boot program codes respectively is to be updated according to data of the boot information, and updating the determined one of the partitions storing the first and the second customized boot program codes respectively with the program code of system firmware file stored in the memory; and

(e) loading the updated one of the first and the second customized boot program codes stored respectively in the partitions of the UEFI BIOS into the memory, and executing the updated one of the first and the second customized boot program codes in the memory to boot the platform system.

5. The boot method according to claim 4, before the step of (c) the method further comprising steps of:

(a) loading the initial boot program code stored in one of the partitions of the UEFI BIOS into the memory, and executing the initial boot program code stored in the memory to perform a first phase of boot; and

(b) loading one of the first and the second customized boot program codes stored in the partitions of the UEFI BIOS into the memory according to data in the boot information, and executing the program code loaded in the memory to perform a second phase of boot by the CPU.

6. The boot method according to claim 5, wherein the step of (b) comprises the step of:

if a first flag in the boot information and corresponding to the first customized boot program code is set to bootable, loading the first customized boot program code stored in one of the partitions of the UEFI BIOS into the memory and executing the first customized boot program code stored in the memory to perform the second phase of boot by the CPU; and

if a second flag in the boot information and corresponding to the second customized boot program code is set to bootable, loading the second customized boot program code stored in one of the partitions of the UEFI BIOS into the memory and executing the second customized boot program code stored in the memory to perform the second phase of boot by the CPU.

7. The boot method according to claim 5, wherein a security phase program code and a PEI phase program code in the memory are executed by the CPU to perform the first phase of boot;

and

a DXE phase program code and a BDS phase program code in the memory are executed by the CPU to perform the second phase of boot.

8. The boot method according to claims 4, wherein the step of (d) comprises the step of:

updating the partition storing the second customized boot program code with the program code of system firmware file stored in the memory if a first flag in the boot information and corresponding to the first customized boot program code is set to bootable.

9. The boot method according to claim 8, wherein the step of (e) comprises the steps of:

determining whether the updated program code in the partition corresponding to the second customized boot program code is identical to the program code of system firmware file;

if the updated program code in the partition corresponding to the second customized boot program code is identical to the program code of system firmware file, setting the first flag to unbootable and a second flag in the boot information and corresponding to the second customized boot program code to bootable, loading the updated second customized boot program code in one of the partitions of UEFI BIOS into the memory, and executing the updated program code in the memory by the CPU to boot the platform system; and

if the updated program code in the partition corresponding to the second customized boot program code is not identical to the program code of system firmware file, loading the first customized boot program code in one of the partitions of UEFI BIOS into the memory, and executing the program code in the memory by the CPU to boot the platform system.

10. The boot method according to claims 4, wherein the step of (d) comprises the step of:

updating the partition storing the first customized boot program code with the program code of system firmware file stored in the memory if a second flag in the boot information and corresponding to the second customized boot program code is set to bootable.

11. The boot method according to claim 10, wherein the step of (e) comprises the steps of:

determining whether the updated program code in the partition corresponding to the first customized boot program code is identical to the program code of system firmware file;

if the updated program code in the partition corresponding to the first customized boot program code is identical to the program code of system firmware file, setting the first flag to bootable and a second flag in the boot information and corresponding to the second customized boot program code to unbootable, loading the updated first customized boot program code in one of the partitions of UEFI BIOS into the memory, and executing the updated program code in the memory by the CPU to boot the platform system; and

if the updated program code in the partition corresponding to the first customized boot program code is not identical to the program code of system firmware file, loading the second customized boot program code in one of the partitions of UEFI BIOS into the memory, and executing the program code in the memory by the CPU to boot the platform system.

12. A boot method for a platform system including a UEFI BIOS in which an initial boot program code, a factory setting boot program code, a first customized boot program code and first boot information are stored, the method comprising steps of:

(a) loading the initial boot program code into a memory, and executing the initial boot program code stored in the memory to perform a first phase of boot, whereby the platform system is enabled to connect with a remote server in which a second customized boot program code and second boot information are stored; and

(b) loading one of the factory setting boot program code, the first customized boot program code and the second customized boot program code into the memory according to data in the first and second boot information, and executing the program code loaded into the memory to perform a second phase of boot.

13. The boot method according to claim 12, wherein the step of (b) comprises steps of:

if a first flag in the first boot information and corresponding to the first customized boot program code is set to bootable, loading the first customized boot program code stored in the UEFI BIOS into the memory and executing the first customized boot program code stored in the memory to perform the second phase of boot; and

if the first flag is set to unbootable and a second flag in the second boot information and corresponding to the second customized boot program code is set to bootable, downloading the second customized boot program code from the remote server into the memory and executing the second customized boot program code stored in the memory to perform the second phase of boot.

14. The boot method according to claim 12, wherein the step of (b) comprises steps of:

if a second flag in the second boot information and corresponding to the second customized boot program code is set to bootable, downloading the second customized boot program code from the remote server into the memory and executing the second customized boot program code in the memory to perform the second phase of boot; and

if the second flag is set to unbootable and a first flag in the first boot information and corresponding to the first customized boot program code is set to bootable, loading the first customized boot program code stored in the UEFI BIOS into the memory and executing the first customized boot program code stored in the memory to perform the second phase of boot.

15. The boot method according to claim 13, wherein the step of (b) comprises step of:

if none of the first and the second flags is set to bootable, loading the factory setting boot program code from the UEFI BIOS into the memory and executing the factory setting boot program code in the memory to perform the second phase of boot.

16. A boot system for a platform system comprising:

a UEFI BIOS having partitions storing an initial boot program code, a factory setting boot program code, a first customized boot program code and first boot information respectively, wherein the platform system is enabled to connect with a remote server in which a second customized boot program code and second boot information are stored;

a memory for storing the initial boot program code, the factory setting boot program code, the first customized boot program code or the second customized boot program code; and

a CPU for executing the initial boot program code, the factory setting boot program code, the first customized boot program code or the second customized boot program code stored in the memory so as to boot the platform system, wherein the boot system implements the boot method according to any one of claims 12-15.