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 84