1 files changed, 83 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/vga.h b/arch/alpha/include/asm/vga.h
new file mode 100644
index 000000000..4c347a845
--- /dev/null
+++ b/arch/alpha/include/asm/vga.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *	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>
+
+#define VT_BUF_HAVE_RW
+#define VT_BUF_HAVE_MEMSETW
+#define VT_BUF_HAVE_MEMCPYW
+
+static inline void scr_writew(u16 val, volatile u16 *addr)
+{
+	if (__is_ioaddr(addr))
+		__raw_writew(val, (volatile u16 __iomem *) addr);
+	else
+		*addr = val;
+}
+
+static inline u16 scr_readw(volatile const u16 *addr)
+{
+	if (__is_ioaddr(addr))
+		return __raw_readw((volatile const u16 __iomem *) addr);
+	else
+		return *addr;
+}
+
+static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
+{
+	if (__is_ioaddr(s))
+		memsetw_io((u16 __iomem *) s, c, count);
+	else
+		memset16(s, c, count / 2);
+}
+
+/* Do not trust that the usage will be correct; analyze the arguments.  */
+extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
+
+/* ??? These are currently only used for downloading character sets.  As
+   such, they don't need memory barriers.  Is this all they are intended
+   to be used for?  */
+#define vga_readb(a)	readb((u8 __iomem *)(a))
+#define vga_writeb(v,a)	writeb(v, (u8 __iomem *)(a))
+
+#ifdef CONFIG_VGA_HOSE
+#include <linux/ioport.h>
+#include <linux/pci.h>
+
+extern struct pci_controller *pci_vga_hose;
+
+# define __is_port_vga(a)       \
+	(((a) >= 0x3b0) && ((a) < 0x3e0) && \
+	 ((a) != 0x3b3) && ((a) != 0x3d3))
+
+# define __is_mem_vga(a) \
+	(((a) >= 0xa0000) && ((a) <= 0xc0000))
+
+# define FIXUP_IOADDR_VGA(a) do {                       \
+	if (pci_vga_hose && __is_port_vga(a))     \
+		(a) += pci_vga_hose->io_space->start;	  \
+ } while(0)
+
+# define FIXUP_MEMADDR_VGA(a) do {                       \
+	if (pci_vga_hose && __is_mem_vga(a))     \
+		(a) += pci_vga_hose->mem_space->start; \
+ } while(0)
+
+#else /* CONFIG_VGA_HOSE */
+# define pci_vga_hose 0
+# define __is_port_vga(a) 0
+# define __is_mem_vga(a) 0
+# define FIXUP_IOADDR_VGA(a)
+# define FIXUP_MEMADDR_VGA(a)
+#endif /* CONFIG_VGA_HOSE */
+
+#define VGA_MAP_MEM(x,s)	((unsigned long) ioremap(x, s))
+
+#endif