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83 lines
2.0 KiB
83 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Access to VGA videoram |
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* |
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* (c) 1998 Martin Mares <[email protected]> |
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*/ |
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#ifndef _LINUX_ASM_VGA_H_ |
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#define _LINUX_ASM_VGA_H_ |
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#include <asm/io.h> |
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#define VT_BUF_HAVE_RW |
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#define VT_BUF_HAVE_MEMSETW |
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#define VT_BUF_HAVE_MEMCPYW |
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static inline void scr_writew(u16 val, volatile u16 *addr) |
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{ |
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if (__is_ioaddr(addr)) |
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__raw_writew(val, (volatile u16 __iomem *) addr); |
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else |
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*addr = val; |
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} |
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static inline u16 scr_readw(volatile const u16 *addr) |
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{ |
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if (__is_ioaddr(addr)) |
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return __raw_readw((volatile const u16 __iomem *) addr); |
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else |
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return *addr; |
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} |
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static inline void scr_memsetw(u16 *s, u16 c, unsigned int count) |
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{ |
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if (__is_ioaddr(s)) |
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memsetw_io((u16 __iomem *) s, c, count); |
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else |
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memset16(s, c, count / 2); |
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} |
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/* Do not trust that the usage will be correct; analyze the arguments. */ |
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extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count); |
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/* ??? These are currently only used for downloading character sets. As |
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such, they don't need memory barriers. Is this all they are intended |
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to be used for? */ |
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#define vga_readb(a) readb((u8 __iomem *)(a)) |
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#define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a)) |
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#ifdef CONFIG_VGA_HOSE |
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#include <linux/ioport.h> |
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#include <linux/pci.h> |
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extern struct pci_controller *pci_vga_hose; |
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# define __is_port_vga(a) \ |
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(((a) >= 0x3b0) && ((a) < 0x3e0) && \ |
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((a) != 0x3b3) && ((a) != 0x3d3)) |
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# define __is_mem_vga(a) \ |
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(((a) >= 0xa0000) && ((a) <= 0xc0000)) |
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# define FIXUP_IOADDR_VGA(a) do { \ |
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if (pci_vga_hose && __is_port_vga(a)) \ |
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(a) += pci_vga_hose->io_space->start; \ |
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} while(0) |
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# define FIXUP_MEMADDR_VGA(a) do { \ |
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if (pci_vga_hose && __is_mem_vga(a)) \ |
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(a) += pci_vga_hose->mem_space->start; \ |
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} while(0) |
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#else /* CONFIG_VGA_HOSE */ |
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# define pci_vga_hose 0 |
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# define __is_port_vga(a) 0 |
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# define __is_mem_vga(a) 0 |
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# define FIXUP_IOADDR_VGA(a) |
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# define FIXUP_MEMADDR_VGA(a) |
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#endif /* CONFIG_VGA_HOSE */ |
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#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s)) |
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#endif
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