diff options
Diffstat (limited to 'Lessons_uncategorized/Lesson_FDF')
| -rw-r--r-- | Lessons_uncategorized/Lesson_FDF/README.md | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/Lessons_uncategorized/Lesson_FDF/README.md b/Lessons_uncategorized/Lesson_FDF/README.md index 1f1edc4..bc6bd70 100644 --- a/Lessons_uncategorized/Lesson_FDF/README.md +++ b/Lessons_uncategorized/Lesson_FDF/README.md @@ -126,7 +126,7 @@ FVMAIN_COMPACT [27%Full] 3440640 (0x348000) total, 935208 (0xe4528) used, 250543 - Done - ``` -This image process is initiated because the package DSC file `OvmfPkg/OvmfPkgX64.dsc` has `FLASH_DEFINITION` identifier defined: +This image process is initiated because the package DSC file [`OvmfPkg/OvmfPkgX64.dsc`](https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgX64.dsc) has `FLASH_DEFINITION` identifier defined: ``` [Defines] ... @@ -138,7 +138,7 @@ This file defines the flash images generated in the end of the build. Each image is called `Flash Device Image` and is defined by the `[FD.<name>]` section. -For example `OvmfPkg/OvmfPkgX64.fdf` has 4 such sections: +For example [`OvmfPkg/OvmfPkgX64.fdf`](https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgX64.fdf) has 4 such sections: ``` [FD.OVMF] [FD.OVMF_VARS] @@ -208,12 +208,12 @@ These tokens define block structure of a flash chip. If they are present this ru BlockSize * NumBlocks = Size ``` -Let's look at the values for these tokens in the `OvmfPkg/OvmfPkgX64.fdf` file. Most of the tokens there are defined via defines. For their definition we should look in the `[Defines]` section: +Let's look at the values for these tokens in the [`OvmfPkg/OvmfPkgX64.fdf`](https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgX64.fdf) file. Most of the tokens there are defined via defines. For their definition we should look in the `[Defines]` section: ``` [Defines] !include OvmfPkgDefines.fdf.inc ``` -As you can see this section uses `!include` directive to abstract all defines in the separate file. If you look at this file, you'll see that it contains some `if...endif` logic depending on the value of `FD_SIZE_IN_KB` variable for various configurations. In our case `OvmfPkg/OvmfPkgX64.dsc` defines `FD_SIZE_IN_KB` as `4096`: +As you can see this section uses `!include` directive to abstract all defines in the separate file. If you look at this file, you'll see that it contains some `if...endif` logic depending on the value of `FD_SIZE_IN_KB` variable for various configurations. In our case [`OvmfPkg/OvmfPkgX64.dsc`](https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgX64.dsc) defines `FD_SIZE_IN_KB` as `4096`: ``` [Defines] ... @@ -229,7 +229,7 @@ As you can see this section uses `!include` directive to abstract all defines in DEFINE FD_SIZE_IN_KB = 4096 !endif ``` -Therefore we use the following defines from the `OvmfPkg/OvmfPkgDefines.fdf.inc` file: +Therefore we use the following defines from the [`OvmfPkg/OvmfPkgDefines.fdf.inc`](https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgDefines.fdf.inc) file: ``` DEFINE BLOCK_SIZE = 0x1000 @@ -253,7 +253,7 @@ DEFINE SECFV_SIZE = 0x34000 DEFINE MEMFD_BASE_ADDRESS = 0x800000 ``` -Now we can calculate the token values for each `Flash Device Image` in the `OvmfPkg/OvmfPkgX64.fdf`: +Now we can calculate the token values for each `Flash Device Image` in the [`OvmfPkg/OvmfPkgX64.fdf`](https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgX64.fdf): ``` [FD.OVMF] BaseAddress = $(FW_BASE_ADDRESS) # 0xFFC00000 @@ -438,7 +438,7 @@ Start with `[FD.OVMF_VARS]` Flash Device Image: ... !include VarStore.fdf.inc ``` -As you can see all of its regions are defined in the `OvmfPkg/VarStore.fdf.inc` file. +As you can see all of its regions are defined in the [`OvmfPkg/VarStore.fdf.inc`](https://github.com/tianocore/edk2/blob/master/OvmfPkg/VarStore.fdf.inc) file. If we remember that `FD_SIZE_IN_KB` is equal to `4096` in our case we can simplify `OvmfPkg/VarStore.fdf.inc` content to this: ``` @@ -477,7 +477,7 @@ Generate Region at Offset 0x42000 Region Name = None ``` -The `[FD.OVMF_CODE]` flash device image consists of two Firmware Volumes (for the defines definition look at the `OvmfPkg/OvmfPkgDefines.fdf.inc` content): +The `[FD.OVMF_CODE]` flash device image consists of two Firmware Volumes (for the defines definition look at the [`OvmfPkg/OvmfPkgDefines.fdf.inc`](https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgDefines.fdf.inc) content): ``` [FD.OVMF_CODE] ... |