1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Access to VGA videoram
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * (c) 1998 Martin Mares <mj@ucw.cz>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef _LINUX_ASM_VGA_H_
9*4882a593Smuzhiyun #define _LINUX_ASM_VGA_H_
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <asm/io.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #define VT_BUF_HAVE_RW
14*4882a593Smuzhiyun #define VT_BUF_HAVE_MEMSETW
15*4882a593Smuzhiyun #define VT_BUF_HAVE_MEMCPYW
16*4882a593Smuzhiyun
scr_writew(u16 val,volatile u16 * addr)17*4882a593Smuzhiyun static inline void scr_writew(u16 val, volatile u16 *addr)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun if (__is_ioaddr(addr))
20*4882a593Smuzhiyun __raw_writew(val, (volatile u16 __iomem *) addr);
21*4882a593Smuzhiyun else
22*4882a593Smuzhiyun *addr = val;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
scr_readw(volatile const u16 * addr)25*4882a593Smuzhiyun static inline u16 scr_readw(volatile const u16 *addr)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun if (__is_ioaddr(addr))
28*4882a593Smuzhiyun return __raw_readw((volatile const u16 __iomem *) addr);
29*4882a593Smuzhiyun else
30*4882a593Smuzhiyun return *addr;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
scr_memsetw(u16 * s,u16 c,unsigned int count)33*4882a593Smuzhiyun static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun if (__is_ioaddr(s))
36*4882a593Smuzhiyun memsetw_io((u16 __iomem *) s, c, count);
37*4882a593Smuzhiyun else
38*4882a593Smuzhiyun memset16(s, c, count / 2);
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun /* Do not trust that the usage will be correct; analyze the arguments. */
42*4882a593Smuzhiyun extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun /* ??? These are currently only used for downloading character sets. As
45*4882a593Smuzhiyun such, they don't need memory barriers. Is this all they are intended
46*4882a593Smuzhiyun to be used for? */
47*4882a593Smuzhiyun #define vga_readb(a) readb((u8 __iomem *)(a))
48*4882a593Smuzhiyun #define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun #ifdef CONFIG_VGA_HOSE
51*4882a593Smuzhiyun #include <linux/ioport.h>
52*4882a593Smuzhiyun #include <linux/pci.h>
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun extern struct pci_controller *pci_vga_hose;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun # define __is_port_vga(a) \
57*4882a593Smuzhiyun (((a) >= 0x3b0) && ((a) < 0x3e0) && \
58*4882a593Smuzhiyun ((a) != 0x3b3) && ((a) != 0x3d3))
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun # define __is_mem_vga(a) \
61*4882a593Smuzhiyun (((a) >= 0xa0000) && ((a) <= 0xc0000))
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun # define FIXUP_IOADDR_VGA(a) do { \
64*4882a593Smuzhiyun if (pci_vga_hose && __is_port_vga(a)) \
65*4882a593Smuzhiyun (a) += pci_vga_hose->io_space->start; \
66*4882a593Smuzhiyun } while(0)
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun # define FIXUP_MEMADDR_VGA(a) do { \
69*4882a593Smuzhiyun if (pci_vga_hose && __is_mem_vga(a)) \
70*4882a593Smuzhiyun (a) += pci_vga_hose->mem_space->start; \
71*4882a593Smuzhiyun } while(0)
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun #else /* CONFIG_VGA_HOSE */
74*4882a593Smuzhiyun # define pci_vga_hose 0
75*4882a593Smuzhiyun # define __is_port_vga(a) 0
76*4882a593Smuzhiyun # define __is_mem_vga(a) 0
77*4882a593Smuzhiyun # define FIXUP_IOADDR_VGA(a)
78*4882a593Smuzhiyun # define FIXUP_MEMADDR_VGA(a)
79*4882a593Smuzhiyun #endif /* CONFIG_VGA_HOSE */
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun #define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s))
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun #endif
84