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 #define VT_BUF_HAVE_MEMMOVEW 17 18 static inline void scr_writew(u16 val, volatile u16 *addr) 19 { 20 if (__is_ioaddr(addr)) 21 __raw_writew(val, (volatile u16 __iomem *) addr); 22 else 23 *addr = val; 24 } 25 26 static inline u16 scr_readw(volatile const u16 *addr) 27 { 28 if (__is_ioaddr(addr)) 29 return __raw_readw((volatile const u16 __iomem *) addr); 30 else 31 return *addr; 32 } 33 34 static inline void scr_memsetw(u16 *s, u16 c, unsigned int count) 35 { 36 if (__is_ioaddr(s)) 37 memsetw_io((u16 __iomem *) s, c, count); 38 else 39 memset16(s, c, count / 2); 40 } 41 42 /* Do not trust that the usage will be correct; analyze the arguments. */ 43 extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count); 44 extern void scr_memmovew(u16 *d, const u16 *s, unsigned int count); 45 46 /* ??? These are currently only used for downloading character sets. As 47 such, they don't need memory barriers. Is this all they are intended 48 to be used for? */ 49 #define vga_readb(a) readb((u8 __iomem *)(a)) 50 #define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a)) 51 52 #ifdef CONFIG_VGA_HOSE 53 #include <linux/ioport.h> 54 #include <linux/pci.h> 55 56 extern struct pci_controller *pci_vga_hose; 57 58 # define __is_port_vga(a) \ 59 (((a) >= 0x3b0) && ((a) < 0x3e0) && \ 60 ((a) != 0x3b3) && ((a) != 0x3d3)) 61 62 # define __is_mem_vga(a) \ 63 (((a) >= 0xa0000) && ((a) <= 0xc0000)) 64 65 # define FIXUP_IOADDR_VGA(a) do { \ 66 if (pci_vga_hose && __is_port_vga(a)) \ 67 (a) += pci_vga_hose->io_space->start; \ 68 } while(0) 69 70 # define FIXUP_MEMADDR_VGA(a) do { \ 71 if (pci_vga_hose && __is_mem_vga(a)) \ 72 (a) += pci_vga_hose->mem_space->start; \ 73 } while(0) 74 75 #else /* CONFIG_VGA_HOSE */ 76 # define pci_vga_hose 0 77 # define __is_port_vga(a) 0 78 # define __is_mem_vga(a) 0 79 # define FIXUP_IOADDR_VGA(a) 80 # define FIXUP_MEMADDR_VGA(a) 81 #endif /* CONFIG_VGA_HOSE */ 82 83 #define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s)) 84 85 #endif 86