cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

fb.h (921B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_FB_H_
      3#define _ASM_FB_H_
      4
      5#include <linux/fb.h>
      6#include <linux/fs.h>
      7#include <asm/page.h>
      8#include <asm/setup.h>
      9
     10#ifdef CONFIG_MMU
     11#ifdef CONFIG_SUN3
     12static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
     13				unsigned long off)
     14{
     15	pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
     16}
     17#else
     18static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
     19				unsigned long off)
     20{
     21	if (CPU_IS_020_OR_030)
     22		pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
     23	if (CPU_IS_040_OR_060) {
     24		pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
     25		/* Use no-cache mode, serialized */
     26		pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
     27	}
     28}
     29#endif /* CONFIG_SUN3 */
     30#else
     31#define fb_pgprotect(...) do {} while (0)
     32#endif /* CONFIG_MMU */
     33
     34static inline int fb_is_primary_device(struct fb_info *info)
     35{
     36	return 0;
     37}
     38
     39#endif /* _ASM_FB_H_ */