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29 lines
972 B
Markdown
29 lines
972 B
Markdown
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# Tutorial 0E - Global `println!`
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Coming soon!
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This lesson will teach about:
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- Restructuring the current codebase.
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- Realizing global println! and print! macros by reusing macros from the Rust
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standard library.
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- The NullLock, a wrapper that allows using global static variables without
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explicit need for `unsafe {}` code. It is a teaching concept that is only
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valid in single-threaded IRQ-disabled environments. However, it already lays
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the groundwork for the introduction of proper locking mechanisms, e.g. real
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Spinlocks.
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```console
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ferris@box:~$ make raspboot
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[0] UART is live!
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[1] Press a key to continue booting... Greetings fellow Rustacean!
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[2] Switching MMU on now... MMU online.
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[i] Memory layout:
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0x00000000 - 0x0007FFFF | 512 KiB | Kernel stack
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0x00080000 - 0x00082FFF | 12 KiB | Kernel code and RO data
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0x00083000 - 0x00085007 | 8 KiB | Kernel data and BSS
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0x3F000000 - 0x3FFFFFFF | 16 MiB | Device MMIO
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$>
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```
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