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
scr_writew(u16 val,volatile u16 * addr)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
scr_readw(volatile const u16 * addr)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
scr_memsetw(u16 * s,u16 c,unsigned int count)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
83