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authorAl Viro <viro@zeniv.linux.org.uk>2024-01-30 22:25:43 +0300
committerArnd Bergmann <arnd@arndb.de>2024-05-03 23:08:50 +0300
commit5d7531517427429e31d7bb84c00b0c7bec30e280 (patch)
treeb8261b07d91cde408bc4b03452a55281f6c2da55 /arch/alpha
parentfec50db7033ea478773b159e0e2efb135270e3b7 (diff)
downloadlinux-5d7531517427429e31d7bb84c00b0c7bec30e280.tar.xz
alpha: sort scr_mem{cpy,move}w() out
Take scr_memmove() out of line, make both it and scr_memcpyw() conditional upon VGA_CONSOLE or MDA_CONSOLE (if neither is selected, we are certain to be working with the kernel-allocated buffer rather than VRAM and defaults will work just fine). That allows to clean vt_buffer.h, but that's a separate story Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Paul E. McKenney <paulmck@kernel.org> Acked-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/include/asm/vga.h2
-rw-r--r--arch/alpha/kernel/io.c19
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/vga.h b/arch/alpha/include/asm/vga.h
index 4c347a8454c7..919931cb5b63 100644
--- a/arch/alpha/include/asm/vga.h
+++ b/arch/alpha/include/asm/vga.h
@@ -13,6 +13,7 @@
#define VT_BUF_HAVE_RW
#define VT_BUF_HAVE_MEMSETW
#define VT_BUF_HAVE_MEMCPYW
+#define VT_BUF_HAVE_MEMMOVEW
static inline void scr_writew(u16 val, volatile u16 *addr)
{
@@ -40,6 +41,7 @@ static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
/* Do not trust that the usage will be correct; analyze the arguments. */
extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
+extern void scr_memmovew(u16 *d, const u16 *s, unsigned int count);
/* ??? These are currently only used for downloading character sets. As
such, they don't need memory barriers. Is this all they are intended
diff --git a/arch/alpha/kernel/io.c b/arch/alpha/kernel/io.c
index eda09778268f..c28035d6d1e6 100644
--- a/arch/alpha/kernel/io.c
+++ b/arch/alpha/kernel/io.c
@@ -647,6 +647,10 @@ void _memset_c_io(volatile void __iomem *to, unsigned long c, long count)
EXPORT_SYMBOL(_memset_c_io);
+#if IS_ENABLED(CONFIG_VGA_CONSOLE) || IS_ENABLED(CONFIG_MDA_CONSOLE)
+
+#include <asm/vga.h>
+
/* A version of memcpy used by the vga console routines to move data around
arbitrarily between screen and main memory. */
@@ -681,6 +685,21 @@ scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
EXPORT_SYMBOL(scr_memcpyw);
+void scr_memmovew(u16 *d, const u16 *s, unsigned int count)
+{
+ if (d < s)
+ scr_memcpyw(d, s, count);
+ else {
+ count /= 2;
+ d += count;
+ s += count;
+ while (count--)
+ scr_writew(scr_readw(--s), --d);
+ }
+}
+EXPORT_SYMBOL(scr_memmovew);
+#endif
+
void __iomem *ioport_map(unsigned long port, unsigned int size)
{
return IO_CONCAT(__IO_PREFIX,ioportmap) (port);