2 * Access to VGA videoram
4 * (c) 1998 Martin Mares <mj@ucw.cz>
7 #ifndef _LINUX_ASM_VGA_H_
8 #define _LINUX_ASM_VGA_H_
12 #define VT_BUF_HAVE_RW
13 #define VT_BUF_HAVE_MEMSETW
14 #define VT_BUF_HAVE_MEMCPYW
16 static inline void scr_writew(u16 val, volatile u16 *addr)
18 if (__is_ioaddr(addr))
19 __raw_writew(val, (volatile u16 __iomem *) addr);
24 static inline u16 scr_readw(volatile const u16 *addr)
26 if (__is_ioaddr(addr))
27 return __raw_readw((volatile const u16 __iomem *) addr);
32 static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
35 memsetw_io((u16 __iomem *) s, c, count);
40 /* Do not trust that the usage will be correct; analyze the arguments. */
41 extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
43 /* ??? These are currently only used for downloading character sets. As
44 such, they don't need memory barriers. Is this all they are intended
46 #define vga_readb(a) readb((u8 __iomem *)(a))
47 #define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
49 #ifdef CONFIG_VGA_HOSE
50 #include <linux/ioport.h>
51 #include <linux/pci.h>
53 extern struct pci_controller *pci_vga_hose;
55 # define __is_port_vga(a) \
56 (((a) >= 0x3b0) && ((a) < 0x3e0) && \
57 ((a) != 0x3b3) && ((a) != 0x3d3))
59 # define __is_mem_vga(a) \
60 (((a) >= 0xa0000) && ((a) <= 0xc0000))
62 # define FIXUP_IOADDR_VGA(a) do { \
63 if (pci_vga_hose && __is_port_vga(a)) \
64 (a) += pci_vga_hose->io_space->start; \
67 # define FIXUP_MEMADDR_VGA(a) do { \
68 if (pci_vga_hose && __is_mem_vga(a)) \
69 (a) += pci_vga_hose->mem_space->start; \
72 #else /* CONFIG_VGA_HOSE */
73 # define pci_vga_hose 0
74 # define __is_port_vga(a) 0
75 # define __is_mem_vga(a) 0
76 # define FIXUP_IOADDR_VGA(a)
77 # define FIXUP_MEMADDR_VGA(a)
78 #endif /* CONFIG_VGA_HOSE */
80 #define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s))