arch/alpha/include/asm/vga.h

   1 /*
   2  *      Access to VGA videoram
   3  *
   4  *      (c) 1998 Martin Mares <mj@ucw.cz>
   5  */
   6
   7 #ifndef _LINUX_ASM_VGA_H_
   8 #define _LINUX_ASM_VGA_H_
   9
  10 #include <asm/io.h>
  11
  12 #define VT_BUF_HAVE_RW
  13 #define VT_BUF_HAVE_MEMSETW
  14 #define VT_BUF_HAVE_MEMCPYW
  15
  16 static inline void scr_writew(u16 val, volatile u16 *addr)
  17 {
  18         if (__is_ioaddr(addr))
  19                 __raw_writew(val, (volatile u16 __iomem *) addr);
  20         else
  21                 *addr = val;
  22 }
  23
  24 static inline u16 scr_readw(volatile const u16 *addr)
  25 {
  26         if (__is_ioaddr(addr))
  27                 return __raw_readw((volatile const u16 __iomem *) addr);
  28         else
  29                 return *addr;
  30 }
  31
  32 static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
  33 {
  34         if (__is_ioaddr(s))
  35                 memsetw_io((u16 __iomem *) s, c, count);
  36         else
  37                 memsetw(s, c, count);
  38 }
  39
  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);
  42
  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
  45    to be used for?  */
  46 #define vga_readb(a)    readb((u8 __iomem *)(a))
  47 #define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
  48
  49 #ifdef CONFIG_VGA_HOSE
  50 #include <linux/ioport.h>
  51 #include <linux/pci.h>
  52
  53 extern struct pci_controller *pci_vga_hose;
  54
  55 # define __is_port_vga(a)       \
  56         (((a) >= 0x3b0) && ((a) < 0x3e0) && \
  57          ((a) != 0x3b3) && ((a) != 0x3d3))
  58
  59 # define __is_mem_vga(a) \
  60         (((a) >= 0xa0000) && ((a) <= 0xc0000))
  61
  62 # define FIXUP_IOADDR_VGA(a) do {                       \
  63         if (pci_vga_hose && __is_port_vga(a))     \
  64                 (a) += pci_vga_hose->io_space->start;     \
  65  } while(0)
  66
  67 # define FIXUP_MEMADDR_VGA(a) do {                       \
  68         if (pci_vga_hose && __is_mem_vga(a))     \
  69                 (a) += pci_vga_hose->mem_space->start; \
  70  } while(0)
  71
  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 */
  79
  80 #define VGA_MAP_MEM(x,s)        ((unsigned long) ioremap(x, s))
  81
  82 #endif