98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
/*
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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/e2k_api.h>
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#include <asm/mas.h>
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/*
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* On the PC, we can just recalculate addresses and then
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* access the videoram directly without any black magic.
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*/
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#define E2K_VGA_DIRECT_IOMEM
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#define VGA_MAP_MEM(x, s) (unsigned long)phys_to_virt(x)
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#define VGA_VRAM_PHYS_BASE 0x00000a0000UL /* VGA video RAM low memory */
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#define VGA_VRAM_SIZE 0x0000020000UL /* a0000 - c0000 */
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#ifdef E2K_VGA_DIRECT_IOMEM
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#define native_scr_writew(val, addr) (*(addr) = (val))
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#define native_scr_readw(addr) (*(addr))
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#define native_vga_readb(addr) (*(addr))
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#define native_vga_writeb(val, addr) (*(addr) = (val))
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#else
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#define VT_BUF_HAVE_RW
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static inline void native_scr_writew(u16 val, volatile u16 *addr)
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{
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native_writew(val, addr);
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}
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static inline u16 native_scr_readw(volatile const u16 *addr)
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{
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return native_readw(addr);
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}
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static inline void native_vga_writeb(u8 val, volatile u8 *addr)
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{
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native_writeb(val, addr);
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}
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static inline u8 native_vga_readb(volatile const u8 *addr)
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{
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return native_readb(addr);
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}
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#endif /* E2K_VGA_DIRECT_IOMEM */
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#ifdef CONFIG_KVM_GUEST_KERNEL
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/* native guest kernel */
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#include <asm/kvm/guest/vga.h>
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#elif defined(CONFIG_PARAVIRT_GUEST)
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/* paravirtualized host and guest kernel */
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#include <asm/paravirt/vga.h>
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#else /* ! CONFIG_KVM_GUEST_KERNEL && ! CONFIG_PARAVIRT_GUEST */
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/* native host kernel with or whithout visrtualizaton */
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static inline void scr_writew(u16 val, volatile u16 *addr)
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{
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native_scr_writew(val, addr);
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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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return native_scr_readw(addr);
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}
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static inline void vga_writeb(u8 val, volatile u8 *addr)
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{
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native_vga_writeb(val, addr);
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}
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static inline u8 vga_readb(volatile const u8 *addr)
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{
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return native_vga_readb(addr);
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}
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#endif /* CONFIG_KVM_GUEST_KERNEL */
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/*
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* Our drivers doens't use VGA legacy resources so
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* we assume we can't have any conflicts
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*/
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#define __ARCH_HAS_VGA_CONFLICT
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struct pci_dev;
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static inline int vga_conflicts(struct pci_dev *p1, struct pci_dev *p2)
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{
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return 0;
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}
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#endif
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