mirror of https://gitee.com/openkylin/linux.git
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/* 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 <mj@ucw.cz>
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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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