1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
2024b246eSLinus Torvalds /*
3024b246eSLinus Torvalds * Access to VGA videoram
4024b246eSLinus Torvalds *
5024b246eSLinus Torvalds * (c) 1998 Martin Mares <mj@ucw.cz>
6024b246eSLinus Torvalds */
7024b246eSLinus Torvalds
8024b246eSLinus Torvalds #ifndef _LINUX_ASM_VGA_H_
9024b246eSLinus Torvalds #define _LINUX_ASM_VGA_H_
10024b246eSLinus Torvalds
11024b246eSLinus Torvalds #include <asm/io.h>
12024b246eSLinus Torvalds
13024b246eSLinus Torvalds #define VT_BUF_HAVE_RW
14024b246eSLinus Torvalds #define VT_BUF_HAVE_MEMSETW
15024b246eSLinus Torvalds #define VT_BUF_HAVE_MEMCPYW
16024b246eSLinus Torvalds
scr_writew(u16 val,volatile u16 * addr)17024b246eSLinus Torvalds static inline void scr_writew(u16 val, volatile u16 *addr)
18024b246eSLinus Torvalds {
19024b246eSLinus Torvalds if (__is_ioaddr(addr))
20024b246eSLinus Torvalds __raw_writew(val, (volatile u16 __iomem *) addr);
21024b246eSLinus Torvalds else
22024b246eSLinus Torvalds *addr = val;
23024b246eSLinus Torvalds }
24024b246eSLinus Torvalds
scr_readw(volatile const u16 * addr)25024b246eSLinus Torvalds static inline u16 scr_readw(volatile const u16 *addr)
26024b246eSLinus Torvalds {
27024b246eSLinus Torvalds if (__is_ioaddr(addr))
28024b246eSLinus Torvalds return __raw_readw((volatile const u16 __iomem *) addr);
29024b246eSLinus Torvalds else
30024b246eSLinus Torvalds return *addr;
31024b246eSLinus Torvalds }
32024b246eSLinus Torvalds
scr_memsetw(u16 * s,u16 c,unsigned int count)33024b246eSLinus Torvalds static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
34024b246eSLinus Torvalds {
35024b246eSLinus Torvalds if (__is_ioaddr(s))
36024b246eSLinus Torvalds memsetw_io((u16 __iomem *) s, c, count);
37024b246eSLinus Torvalds else
3892ce4c3eSMatthew Wilcox memset16(s, c, count / 2);
39024b246eSLinus Torvalds }
40024b246eSLinus Torvalds
41024b246eSLinus Torvalds /* Do not trust that the usage will be correct; analyze the arguments. */
42024b246eSLinus Torvalds extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
43024b246eSLinus Torvalds
44024b246eSLinus Torvalds /* ??? These are currently only used for downloading character sets. As
45024b246eSLinus Torvalds such, they don't need memory barriers. Is this all they are intended
46024b246eSLinus Torvalds to be used for? */
47024b246eSLinus Torvalds #define vga_readb(a) readb((u8 __iomem *)(a))
48024b246eSLinus Torvalds #define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
49024b246eSLinus Torvalds
50024b246eSLinus Torvalds #ifdef CONFIG_VGA_HOSE
51024b246eSLinus Torvalds #include <linux/ioport.h>
52024b246eSLinus Torvalds #include <linux/pci.h>
53024b246eSLinus Torvalds
54024b246eSLinus Torvalds extern struct pci_controller *pci_vga_hose;
55024b246eSLinus Torvalds
56024b246eSLinus Torvalds # define __is_port_vga(a) \
57024b246eSLinus Torvalds (((a) >= 0x3b0) && ((a) < 0x3e0) && \
58024b246eSLinus Torvalds ((a) != 0x3b3) && ((a) != 0x3d3))
59024b246eSLinus Torvalds
60024b246eSLinus Torvalds # define __is_mem_vga(a) \
61024b246eSLinus Torvalds (((a) >= 0xa0000) && ((a) <= 0xc0000))
62024b246eSLinus Torvalds
63024b246eSLinus Torvalds # define FIXUP_IOADDR_VGA(a) do { \
64024b246eSLinus Torvalds if (pci_vga_hose && __is_port_vga(a)) \
65024b246eSLinus Torvalds (a) += pci_vga_hose->io_space->start; \
66024b246eSLinus Torvalds } while(0)
67024b246eSLinus Torvalds
68024b246eSLinus Torvalds # define FIXUP_MEMADDR_VGA(a) do { \
69024b246eSLinus Torvalds if (pci_vga_hose && __is_mem_vga(a)) \
70024b246eSLinus Torvalds (a) += pci_vga_hose->mem_space->start; \
71024b246eSLinus Torvalds } while(0)
72024b246eSLinus Torvalds
73024b246eSLinus Torvalds #else /* CONFIG_VGA_HOSE */
74024b246eSLinus Torvalds # define pci_vga_hose 0
75024b246eSLinus Torvalds # define __is_port_vga(a) 0
76024b246eSLinus Torvalds # define __is_mem_vga(a) 0
77024b246eSLinus Torvalds # define FIXUP_IOADDR_VGA(a)
78024b246eSLinus Torvalds # define FIXUP_MEMADDR_VGA(a)
79024b246eSLinus Torvalds #endif /* CONFIG_VGA_HOSE */
80024b246eSLinus Torvalds
81024b246eSLinus Torvalds #define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s))
82024b246eSLinus Torvalds
83024b246eSLinus Torvalds #endif
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