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 83