cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vga.h (2050B)

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