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Update linux-interrupts-1.md
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Sebastian Fricke 2021-02-27 08:28:31 +01:00 committed by GitHub
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Interrupts/linux-interrupts-1.md
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@ -37,7 +37,7 @@ Addresses of each of the interrupt handlers are maintained in a special location
BUG_ON((unsigned)n > 0xFF); BUG_ON((unsigned)n > 0xFF);
``` ```
You can find this check within the Linux kernel source code related to interrupt setup (e.g. The `set_intr_gate` in [arch/x86/kernel/idt.c](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/kernel/ldt.c)). The first 32 vector numbers from `0` to `31` are reserved by the processor and used for the processing of architecture-defined exceptions and interrupts. You can find the table with the description of these vector numbers in the second part of the Linux kernel initialization process - [Early interrupt and exception handling](https://0xax.gitbook.io/linux-insides/summary/initialization/linux-initialization-2). Vector numbers from `32` to `255` are designated as user-defined interrupts and are not reserved by the processor. These interrupts are generally assigned to external I/O devices to enable those devices to send interrupts to the processor. You can find this check within the Linux kernel source code related to interrupt setup (e.g. The `set_intr_gate` in [arch/x86/kernel/idt.c](https://github.com/torvalds/linux/blob/master/arch/x86/kernel/idt.c)). The first 32 vector numbers from `0` to `31` are reserved by the processor and used for the processing of architecture-defined exceptions and interrupts. You can find the table with the description of these vector numbers in the second part of the Linux kernel initialization process - [Early interrupt and exception handling](https://0xax.gitbook.io/linux-insides/summary/initialization/linux-initialization-2). Vector numbers from `32` to `255` are designated as user-defined interrupts and are not reserved by the processor. These interrupts are generally assigned to external I/O devices to enable those devices to send interrupts to the processor.
Now let's talk about the types of interrupts. Broadly speaking, we can split interrupts into 2 major classes: Now let's talk about the types of interrupts. Broadly speaking, we can split interrupts into 2 major classes: