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-rw-r--r--lib/i386-io-djgpp.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/lib/i386-io-djgpp.h b/lib/i386-io-djgpp.h
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+++ b/lib/i386-io-djgpp.h
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+/*
+ * The PCI Library -- Access to i386 I/O ports on DJGPP
+ *
+ * Copyright (c) 2010, 2017 Rudolf Marek <r.marek@assembler.cz>
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#include <pc.h>
+#include <dos.h>
+#define outb(x,y) outportb(y, x)
+#define outw(x,y) outportw(y, x)
+#define outl(x,y) outportl(y, x)
+
+#define inb inportb
+#define inw inportw
+#define inl inportl
+
+static int irq_enabled;
+
+static int
+intel_setup_io(struct pci_access *a UNUSED)
+{
+ return 1;
+}
+
+static inline void
+intel_cleanup_io(struct pci_access *a UNUSED)
+{
+}
+
+static inline void intel_io_lock(void)
+{
+ asm volatile("" : : : "memory");
+ irq_enabled = disable();
+}
+
+static inline void intel_io_unlock(void)
+{
+ asm volatile("" : : : "memory");
+ if (irq_enabled) {
+ enable();
+ }
+}