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authorkaf24@scramble.cl.cam.ac.uk <kaf24@scramble.cl.cam.ac.uk>2004-03-23 10:40:28 +0000
committerkaf24@scramble.cl.cam.ac.uk <kaf24@scramble.cl.cam.ac.uk>2004-03-23 10:40:28 +0000
commite08c905aad06e3a49269d376169be3180dcdd4e4 (patch)
tree7973fd2f7e385a1b20d5c801644c56fd6de51bf9 /xenolinux-2.4.25-sparse/include/asm-xen/vga.h
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bitkeeper revision 1.823 (4060141cL2UWa7gkwwnmGJlHbv0sAA)
Many files: xeno -> xen renames. mvdir
Diffstat (limited to 'xenolinux-2.4.25-sparse/include/asm-xen/vga.h')
-rw-r--r--xenolinux-2.4.25-sparse/include/asm-xen/vga.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/xenolinux-2.4.25-sparse/include/asm-xen/vga.h b/xenolinux-2.4.25-sparse/include/asm-xen/vga.h
new file mode 100644
index 0000000000..d0624cf480
--- /dev/null
+++ b/xenolinux-2.4.25-sparse/include/asm-xen/vga.h
@@ -0,0 +1,42 @@
+/*
+ * Access to VGA videoram
+ *
+ * (c) 1998 Martin Mares <mj@ucw.cz>
+ */
+
+#ifndef _LINUX_ASM_VGA_H_
+#define _LINUX_ASM_VGA_H_
+
+#include <asm/io.h>
+
+extern unsigned char *vgacon_mmap;
+
+static unsigned long VGA_MAP_MEM(unsigned long x)
+{
+ if( vgacon_mmap == NULL )
+ {
+ /* This is our first time in this function. This whole thing
+ is a rather grim hack. We know we're going to get asked
+ to map a 32KB region between 0xb0000 and 0xb8000 because
+ that's what VGAs are. We used the boot time permanent
+ fixed map region, and map it to machine pages.
+ */
+ if( x != 0xb8000 )
+ panic("Argghh! VGA Console is weird. 1:%08lx\n",x);
+
+ vgacon_mmap = (unsigned char*) bt_ioremap( 0xa0000, 128*1024 );
+ return (unsigned long) (vgacon_mmap+x-0xa0000);
+ }
+ else
+ {
+ if( x != 0xc0000 && x != 0xa0000 ) /* vidmem_end or charmap fonts */
+ panic("Argghh! VGA Console is weird. 2:%08lx\n",x);
+ return (unsigned long) (vgacon_mmap+x-0xa0000);
+ }
+ return 0;
+}
+
+static inline unsigned char vga_readb(unsigned char * x) { return (*(x)); }
+static inline void vga_writeb(unsigned char x, unsigned char *y) { *(y) = (x); }
+
+#endif