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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
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 | ||
d559d4a2 | 17 | static inline void scr_writew(u16 val, volatile u16 *addr) |
1da177e4 LT |
18 | { |
19 | if (__is_ioaddr(addr)) | |
20 | __raw_writew(val, (volatile u16 __iomem *) addr); | |
21 | else | |
22 | *addr = val; | |
23 | } | |
24 | ||
d559d4a2 | 25 | static inline u16 scr_readw(volatile const u16 *addr) |
1da177e4 LT |
26 | { |
27 | if (__is_ioaddr(addr)) | |
28 | return __raw_readw((volatile const u16 __iomem *) addr); | |
29 | else | |
30 | return *addr; | |
31 | } | |
32 | ||
d559d4a2 | 33 | static inline void scr_memsetw(u16 *s, u16 c, unsigned int count) |
1da177e4 LT |
34 | { |
35 | if (__is_ioaddr(s)) | |
36 | memsetw_io((u16 __iomem *) s, c, count); | |
37 | else | |
92ce4c3e | 38 | memset16(s, c, count / 2); |
1da177e4 LT |
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 | ||
025a2215 JE |
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 | ||
4f1bcaf0 | 81 | #define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s)) |
1da177e4 LT |
82 | |
83 | #endif |