Difference between revisions of "Template:RockchipBootPriority"

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====eMMC与TF卡的启动优先级====
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===The Boot order between eMMC and SD card===
默认情况下, 会优先从 TF卡启动系统, 但并不是所有条件下都是这样, 本节内容将详细说明所有情况; <br>
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By default, the system will be booted from the TF card first, but this is not the case under all conditions. This section will explain all situations in detail; <br>
 
<br>
 
<br>
引用Rockchip官方文档[http://opensource.rock-chips.com/wiki_Boot_option]的描述,系统引导程序(Loader)分为以下2种:<br>
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Refer to rockchip official document [http://opensource.rock-chips.com/wiki_Boot_option], there are two types of loader program:<br>
1) U-Boot TPL/SPL (即upsream U-Boot, 也叫主线U-Boot)<br>
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1) U-Boot TPL/SPL (i.e. upsream U-Boot, also called mainline U-Boot)<br>
 
2) Rockchip MiniLoader<br>
 
2) Rockchip MiniLoader<br>
 
<br>
 
<br>
需要留意的是: <br>
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Things to note: <br>
1) FriendlyELEC发布的所有Rom均采用的都是第2种,即Rockchip MiniLoader<br>
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1) FriendlyELEC's image uses Rockchip MiniLoader<br>
2) 第三方固件通常采用的是第1种,  即  U-Boot TPL/SPL<br>
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2) The third-party image usually uses U-Boot TPL/SPL<br>
 
<br>
 
<br>
以下情况无法从 TF卡启动:<br>
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The following situations will always start from eMMC:<br>
如果你的 TF卡或者eMMC上里的系统的 Loader 是采用第一种U-Boot TPL/SPL, 则无法从 TF卡 启动<br>
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If the system in the eMMC, or the system in the TF card uses the first Loader type U-Boot TPL/SPL, it will always boot from the eMMC;<br>
 
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If you want to boot from the TF card, there are the following methods:<br>
恢复从TF卡启动的方法:<br>
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'''Method 1''': Clear the Loader on the eMMC, the clearing method is as follows, after starting from the eMMC, enter the following command on the command line to clear the Loader on the eMMC: <br>
方法1: 如果你需要从 TF卡启动, 你需要先清除 eMMC上的 Loader, 清除方法如下, 从eMMC启动后, 在命令行输入以下命令清除 eMMC上的 Loader: <br>
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<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
dd if=/dev/zero of=/dev/mmcblk0 bs=8M count=1
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dd if=/dev/zero of=/dev/mmcblk2 bs=8M count=1
 
</syntaxhighlight>
 
</syntaxhighlight>
方法2: 插入 TF卡, 短接 Maskrom 触点再上电开机 (需保持短接3秒左右), 将会从 TF卡启动<br>
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'''Method 2''': Insert the TF card, Press Maskrom Key (or short-circuit the Maskrom contacts) and then power on (need to keep the short-circuit for about 3 seconds), it will start from the TF card<br>
 
<br>
 
<br>
总结如下:<br>
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The summary is as follows:<br>
{| class="wikitable"  
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{| class="wikitable"
 
|-
 
|-
! eMMC当前系统
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! eMMC current system
! TF卡当前系统
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! TF card current system
! 启动优先级
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! Boot priority
 
|-
 
|-
| 无系统
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| No system
| 任意固件
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| Any image
| TF卡
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| TF card
 
|-
 
|-
| FriendlyELEC的固件
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| FriendlyELEC's image
| FriendlyELEC的固件
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| FriendlyELEC's image
| TF卡
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| TF card
 
|-
 
|-
| FriendlyELEC的固件
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| FriendlyELEC's image
| 采用主线U-boot的固件
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| Image with Mainline U-boot
 
| eMMC
 
| eMMC
 
|-
 
|-
| 采用主线U-boot的固件
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| Image with Mainline U-boot
| FriendlyELEC的固件
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| FriendlyELEC's image
 
| eMMC
 
| eMMC
 
|-
 
|-
| 采用主线U-boot的固件
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| Image with Mainline U-boot
| 采用主线U-boot的固件
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| Image with Mainline U-boot
 
| eMMC
 
| eMMC
 
|}
 
|}

Latest revision as of 11:06, 2 June 2022

The Boot order between eMMC and SD card

By default, the system will be booted from the TF card first, but this is not the case under all conditions. This section will explain all situations in detail;

Refer to rockchip official document [1], there are two types of loader program:
1) U-Boot TPL/SPL (i.e. upsream U-Boot, also called mainline U-Boot)
2) Rockchip MiniLoader

Things to note:
1) FriendlyELEC's image uses Rockchip MiniLoader
2) The third-party image usually uses U-Boot TPL/SPL

The following situations will always start from eMMC:
If the system in the eMMC, or the system in the TF card uses the first Loader type U-Boot TPL/SPL, it will always boot from the eMMC;
If you want to boot from the TF card, there are the following methods:
Method 1: Clear the Loader on the eMMC, the clearing method is as follows, after starting from the eMMC, enter the following command on the command line to clear the Loader on the eMMC:

dd if=/dev/zero of=/dev/mmcblk2 bs=8M count=1

Method 2: Insert the TF card, Press Maskrom Key (or short-circuit the Maskrom contacts) and then power on (need to keep the short-circuit for about 3 seconds), it will start from the TF card

The summary is as follows:

eMMC current system TF card current system Boot priority
No system Any image TF card
FriendlyELEC's image FriendlyELEC's image TF card
FriendlyELEC's image Image with Mainline U-boot eMMC
Image with Mainline U-boot FriendlyELEC's image eMMC
Image with Mainline U-boot Image with Mainline U-boot eMMC