From 9f28e53c71d28d04e2775c59944d2887a99f1e86 Mon Sep 17 00:00:00 2001
From: Josh Rahm <joshuarahm@gmail.com>
Date: Sun, 22 Nov 2020 01:06:30 -0700
Subject: Large reorganization.

What was in core/ is now moved to arch/stm34l4xxx/peripherals.  This new
directory is *supposed to* to contain raw header files defining just the
pertinent register structures for the various peripherals.  Peripheral
management belongs somewhere in the new `kern/..` directories. This is
not completely the case at the moment, so more refactoring needs to be
done.

What was sitting in the root has now been moved into the kern/
directory. The kern/ directory is to contain everything else
other than raw device register definitions. The root of the kern/
tree is reserved for standard library-esque headers.

The kern/<peripheral> directory contains management systems for that
peripheral. (At the moment DMA is the only peripheral with a decent
management system.) Preferably these peripheral systems should only
include their correlating header in arch/stm34l4xxx/peripherals, and
use other management systems for handling other peripherals rather
than manipulating their raw registers directly. (Though this ideal
will require much more critical mass of management systems.)
---
 02-usart/include/core/irq.h | 89 ---------------------------------------------
 1 file changed, 89 deletions(-)
 delete mode 100644 02-usart/include/core/irq.h

(limited to '02-usart/include/core/irq.h')

diff --git a/02-usart/include/core/irq.h b/02-usart/include/core/irq.h
deleted file mode 100644
index f2fe8d9..0000000
--- a/02-usart/include/core/irq.h
+++ /dev/null
@@ -1,89 +0,0 @@
-#ifndef CORE_IRQ_H__
-#define CORE_IRQ_H__
-
-#include <stdint.h>
-
-/*
- * Include file for interrupt service routines.
- */
-
-typedef enum {
-#define IRQ_RESERVED(n)
-#define IRQ(name_, uname, num) \
-  IRQ_##uname = num,
-#include "core/isrs.inc"
-#undef IRQ
-#undef IRQ_RESERVED
-} interrupt_t;
-
-/* Defines a set of interrupts so they may be enabled all at once. */
-typedef struct {
-  uint32_t sysirqs; /* System iterrupts. */
-  uint32_t irqs[8];
-} interrupt_set_t;
-
-inline static void interrupt_set_add(
-    interrupt_set_t* interrupt_set, interrupt_t interrupt)
-{
-  if (interrupt < 16) {
-    interrupt_set->sysirqs |= 1 << interrupt;
-    return;
-  }
-
-  interrupt -= 16;
-  int loc = interrupt / 32;
-  int off = interrupt % 32;
-
-  interrupt_set->irqs[loc] |= 1 << off;
-}
-
-inline static void interrupt_set_remove(
-    interrupt_set_t* interrupt_set, interrupt_t interrupt)
-{
-  if (interrupt < 16) {
-    interrupt_set->sysirqs &= ~(1 << interrupt);
-    return;
-  }
-
-  interrupt -= 16;
-  int loc = interrupt / 32;
-  int off = interrupt % 32;
-
-  interrupt_set->irqs[loc] &= ~(1 << off);
-}
-
-/*
- * The interrupt service routines. These link in the function `main` as the
- * main function.
- */
-extern const void* vectors[];
-
-/*
- * Defines an error state. This loops forever and defines a distinct flashing
- * pattern to let the user know an unhandled ISR happened.
- */
-void unhandled_isr(uint8_t val);
-
-#define enable_interrupt(val) \
-  {interrupt_set_t itrset = { 0 }; \
-   interrupt_set_add(&itrset, val); \
-    enable_interrupts(&itrset);}
-
-#define disable_interrupt(val) \
-  {interrupt_set_t itrset = { 0 }; \
-   interrupt_set_add(&itrset, val); \
-    disable_interrupts(&itrset);}
-
-/*
- * Enables the provided interrupt. Note that if the interrupt is one of the
- * system interrupts (first 16) this function has no effect because those
- * interrupts are always enabled.
- */
-void enable_interrupts(interrupt_set_t* interrupts);
-
-/*
- * Enables the provided interrupt 
- */
-void disable_interrupts(interrupt_set_t* interrupts);
-
-#endif /* CORE_IRQ_H_ */
-- 
cgit