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