arch/alpha/include/asm/vga.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *      Access to VGA videoram
   4  *
   5  *      (c) 1998 Martin Mares <mj@ucw.cz>
   6  */
   7
   8 #ifndef _LINUX_ASM_VGA_H_
   9 #define _LINUX_ASM_VGA_H_
  10
  11 #include <asm/io.h>
  12
  13 #define VT_BUF_HAVE_RW
  14 #define VT_BUF_HAVE_MEMSETW
  15 #define VT_BUF_HAVE_MEMCPYW
  16
  17 static inline void scr_writew(u16 val, volatile u16 *addr)
  18 {
  19         if (__is_ioaddr(addr))
  20                 __raw_writew(val, (volatile u16 __iomem *) addr);
  21         else
  22                 *addr = val;
  23 }
  24
  25 static inline u16 scr_readw(volatile const u16 *addr)
  26 {
  27         if (__is_ioaddr(addr))
  28                 return __raw_readw((volatile const u16 __iomem *) addr);
  29         else
  30                 return *addr;
  31 }
  32
  33 static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
  34 {
  35         if (__is_ioaddr(s))
  36                 memsetw_io((u16 __iomem *) s, c, count);
  37         else
  38                 memset16(s, c, count / 2);
  39 }
  40
  41 /* Do not trust that the usage will be correct; analyze the arguments.  */
  42 extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
  43
  44 /* ??? These are currently only used for downloading character sets.  As
  45    such, they don't need memory barriers.  Is this all they are intended
  46    to be used for?  */
  47 #define vga_readb(a)    readb((u8 __iomem *)(a))
  48 #define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
  49
  50 #ifdef CONFIG_VGA_HOSE
  51 #include <linux/ioport.h>
  52 #include <linux/pci.h>
  53
  54 extern struct pci_controller *pci_vga_hose;
  55
  56 # define __is_port_vga(a)       \
  57         (((a) >= 0x3b0) && ((a) < 0x3e0) && \
  58          ((a) != 0x3b3) && ((a) != 0x3d3))
  59
  60 # define __is_mem_vga(a) \
  61         (((a) >= 0xa0000) && ((a) <= 0xc0000))
  62
  63 # define FIXUP_IOADDR_VGA(a) do {                       \
  64         if (pci_vga_hose && __is_port_vga(a))     \
  65                 (a) += pci_vga_hose->io_space->start;     \
  66  } while(0)
  67
  68 # define FIXUP_MEMADDR_VGA(a) do {                       \
  69         if (pci_vga_hose && __is_mem_vga(a))     \
  70                 (a) += pci_vga_hose->mem_space->start; \
  71  } while(0)
  72
  73 #else /* CONFIG_VGA_HOSE */
  74 # define pci_vga_hose 0
  75 # define __is_port_vga(a) 0
  76 # define __is_mem_vga(a) 0
  77 # define FIXUP_IOADDR_VGA(a)
  78 # define FIXUP_MEMADDR_VGA(a)
  79 #endif /* CONFIG_VGA_HOSE */
  80
  81 #define VGA_MAP_MEM(x,s)        ((unsigned long) ioremap(x, s))
  82
  83 #endif