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Update to new internal link syntax

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Philipp Oppermann
2019-09-29 15:24:21 +02:00
parent 0b971c9128
commit a133ea82cf
29 changed files with 117 additions and 119 deletions
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blog/content/second-edition/posts/deprecated/05-integration-tests/index.md
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@@ -25,8 +25,8 @@ This blog is openly developed on [GitHub]. If you have any problems or questions
This post builds upon the [_Unit Testing_] post, so you need to follow it first. Alternatively, consider reading the new [_Testing_] post instead, which replaces both _Unit Testing_ and this post. The new posts implements similar functionality, but integrates it directly in `cargo xtest`, so that both unit and integration tests run in a realistic environment inside QEMU.
[_Unit Testing_]: ./second-edition/posts/deprecated/04-unit-testing/index.md
[_Testing_]: ./second-edition/posts/04-testing/index.md
[_Unit Testing_]: @/second-edition/posts/deprecated/04-unit-testing/index.md
[_Testing_]: @/second-edition/posts/04-testing/index.md
## Overview
@@ -60,7 +60,7 @@ The chips implementing a serial interface are called [UARTs]. There are [lots of
### Port I/O
There are two different approaches for communicating between the CPU and peripheral hardware on x86, **memory-mapped I/O** and **port-mapped I/O**. We already used memory-mapped I/O for accessing the [VGA text buffer] through the memory address `0xb8000`. This address is not mapped to RAM, but to some memory on the GPU.
[VGA text buffer]: ./second-edition/posts/03-vga-text-buffer/index.md
[VGA text buffer]: @/second-edition/posts/03-vga-text-buffer/index.md
In contrast, port-mapped I/O uses a separate I/O bus for communication. Each connected peripheral has one or more port numbers. To communicate with such an I/O port there are special CPU instructions called `in` and `out`, which take a port number and a data byte (there are also variations of these commands that allow sending an `u16` or `u32`).
@@ -105,7 +105,7 @@ lazy_static! {
Like with the [VGA text buffer][vga lazy-static], we use `lazy_static` and a spinlock to create a `static`. However, this time we use `lazy_static` to ensure that the `init` method is called before first use. We're using the port address `0x3F8`, which is the standard port number for the first serial interface.
[vga lazy-static]: ./second-edition/posts/03-vga-text-buffer/index.md#lazy-statics
[vga lazy-static]: @/second-edition/posts/03-vga-text-buffer/index.md#lazy-statics
To make the serial port easily usable, we add `serial_print!` and `serial_println!` macros: