mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
4f1bcaf094
VGA_MAP_MEM translates to ioremap() on some architectures. It makes sense to do this to vga_vram_base, because we're going to access memory between vga_vram_base and vga_vram_end. But it doesn't really make sense to map starting at vga_vram_end, because we aren't going to access memory starting there. On ia64, which always has to be different, ioremapping vga_vram_end gives you something completely incompatible with ioremapped vga_vram_start, so vga_vram_size ends up being nonsense. As a bonus, we often know the size up front, so we can use ioremap() correctly, rather than giving it a zero size. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
#ifndef _ASM_POWERPC_VGA_H_
|
|
#define _ASM_POWERPC_VGA_H_
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* Access to VGA videoram
|
|
*
|
|
* (c) 1998 Martin Mares <mj@ucw.cz>
|
|
*/
|
|
|
|
|
|
#include <asm/io.h>
|
|
|
|
|
|
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
|
|
|
|
#define VT_BUF_HAVE_RW
|
|
/*
|
|
* These are only needed for supporting VGA or MDA text mode, which use little
|
|
* endian byte ordering.
|
|
* In other cases, we can optimize by using native byte ordering and
|
|
* <linux/vt_buffer.h> has already done the right job for us.
|
|
*/
|
|
|
|
static inline void scr_writew(u16 val, volatile u16 *addr)
|
|
{
|
|
st_le16(addr, val);
|
|
}
|
|
|
|
static inline u16 scr_readw(volatile const u16 *addr)
|
|
{
|
|
return ld_le16(addr);
|
|
}
|
|
|
|
#define VT_BUF_HAVE_MEMCPYW
|
|
#define scr_memcpyw memcpy
|
|
|
|
#endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
|
|
|
|
extern unsigned long vgacon_remap_base;
|
|
|
|
#ifdef __powerpc64__
|
|
#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap((x), s))
|
|
#else
|
|
#define VGA_MAP_MEM(x,s) (x + vgacon_remap_base)
|
|
#endif
|
|
|
|
#define vga_readb(x) (*(x))
|
|
#define vga_writeb(x,y) (*(y) = (x))
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_VGA_H_ */
|