On Thu, Apr 06, 2006 at 11:21:54AM +0100, Russell King wrote:
> On Wed, Apr 05, 2006 at 04:01:08PM -0600, Bjorn Helgaas wrote:
> > [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use
>
> Ah, seems to be what I just suggested...
>
> > @@ -1020,14 +1019,14 @@
> > char *charmap;
> >
> > if (vga_video_type != VIDEO_TYPE_EGAM) {
> > - charmap = (char *) VGA_MAP_MEM(colourmap);
> > + charmap = (char *) VGA_MAP_MEM(colourmap, 0);
>
> Don't like this though - can't we pass a real size here rather than zero?
> There seems to be several clues as to the maximum size:
>
> #define cmapsz 8192
>
> if (!vga_font_is_default)
> charmap += 4 * cmapsz;
>
> charmap += 2 * cmapsz;
> for (i = 0; i < cmapsz; i++)
> vga_writeb(arg[i], charmap + i);
>
> so that's about 7 * cmapsz - call that 8 for completeness, which is 64K.
Oh, and obviously, can we also have a VGA_UNMAP_MEM() macro as well please?
8) IOW, something like this (which I cobbled together from your patch, some
of it by hand-edits - couldn't get it to apply cleanly to current -git.)
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -391,7 +391,7 @@ static const char __init *vgacon_startup
static struct resource ega_console_resource =
{ .name = "ega", .start = 0x3B0, .end = 0x3BF };
vga_video_type = VIDEO_TYPE_EGAM;
- vga_vram_end = 0xb8000;
+ vga_vram_size = 0x8000;
display_desc = "EGA+";
request_resource(&ioport_resource,
&ega_console_resource);
@@ -401,7 +401,7 @@ static const char __init *vgacon_startup
static struct resource mda2_console_resource =
{ .name = "mda", .start = 0x3BF, .end = 0x3BF };
vga_video_type = VIDEO_TYPE_MDA;
- vga_vram_end = 0xb2000;
+ vga_vram_size = 0x2000;
display_desc = "*MDA";
request_resource(&ioport_resource,
&mda1_console_resource);
@@ -418,7 +418,7 @@ static const char __init *vgacon_startup
if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) {
int i;
- vga_vram_end = 0xc0000;
+ vga_vram_size = 0x8000;
if (!ORIG_VIDEO_ISVGA) {
static struct resource ega_console_resource
@@ -443,7 +443,7 @@ static const char __init *vgacon_startup
* and COE=1 isn't necessarily a good idea)
*/
vga_vram_base = 0xa0000;
- vga_vram_end = 0xb0000;
+ vga_vram_size = 0x10000;
outb_p(6, VGA_GFX_I);
outb_p(6, VGA_GFX_D);
#endif
@@ -475,7 +475,7 @@ static const char __init *vgacon_startup
static struct resource cga_console_resource =
{ .name = "cga", .start = 0x3D4, .end = 0x3D5 };
vga_video_type = VIDEO_TYPE_CGA;
- vga_vram_end = 0xba000;
+ vga_vram_size = 0x2000;
display_desc = "*CGA";
request_resource(&ioport_resource,
&cga_console_resource);
@@ -483,9 +483,8 @@ static const char __init *vgacon_startup
}
}
- vga_vram_base = VGA_MAP_MEM(vga_vram_base);
- vga_vram_end = VGA_MAP_MEM(vga_vram_end);
- vga_vram_size = vga_vram_end - vga_vram_base;
+ vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size);
+ vga_vram_end = vga_vram_base + vga_vram_size;
/*
* Find out if there is a graphics card present.
@@ -1020,14 +1019,14 @@ static int vgacon_do_font_op(struct vgas
char *charmap;
if (vga_video_type != VIDEO_TYPE_EGAM) {
- charmap = (char *) VGA_MAP_MEM(colourmap);
+ charmap = (char *) VGA_MAP_MEM(colourmap, 8 * cmapsz);
beg = 0x0e;
#ifdef VGA_CAN_DO_64KB
if (vga_video_type == VIDEO_TYPE_VGAC)
beg = 0x06;
#endif
} else {
- charmap = (char *) VGA_MAP_MEM(blackwmap);
+ charmap = (char *) VGA_MAP_MEM(blackwmap, 8 * cmapsz);
beg = 0x0a;
}
@@ -1102,6 +1101,8 @@ static int vgacon_do_font_op(struct vgas
}
}
+ VGA_UNMAP_MEM(charmap, 8 * cmapsz);
+
spin_lock_irq(&vga_lock);
/* First, the sequencer, Synchronous reset */
vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01);
Index: work-mm5/include/asm-alpha/vga.h
===================================================================
--- work-mm5.orig/include/asm-alpha/vga.h 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/include/asm-alpha/vga.h 2006-04-05 15:42:35.000000000 -0600
@@ -46,6 +46,7 @@
#define vga_readb(a) readb((u8 __iomem *)(a))
#define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
-#define VGA_MAP_MEM(x) ((unsigned long) ioremap(x, 0))
+#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s))
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#endif
Index: work-mm5/include/asm-arm/vga.h
===================================================================
--- work-mm5.orig/include/asm-arm/vga.h 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/include/asm-arm/vga.h 2006-04-05 15:42:21.000000000 -0600
@@ -4,7 +4,8 @@
#include <asm/hardware.h>
#include <asm/io.h>
-#define VGA_MAP_MEM(x) (PCIMEM_BASE + (x))
+#define VGA_MAP_MEM(x,s) (PCIMEM_BASE + (x))
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#define vga_readb(x) (*((volatile unsigned char *)x))
#define vga_writeb(x,y) (*((volatile unsigned char *)y) = (x))
Index: work-mm5/include/asm-i386/vga.h
===================================================================
--- work-mm5.orig/include/asm-i386/vga.h 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/include/asm-i386/vga.h 2006-04-05 15:42:49.000000000 -0600
@@ -12,7 +12,8 @@
* access the videoram directly without any black magic.
*/
-#define VGA_MAP_MEM(x) (unsigned long)phys_to_virt(x)
+#define VGA_MAP_MEM(x,s) (unsigned long)phys_to_virt(x)
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#define vga_readb(x) (*(x))
#define vga_writeb(x,y) (*(y) = (x))
Index: work-mm5/include/asm-ia64/vga.h
===================================================================
--- work-mm5.orig/include/asm-ia64/vga.h 2006-04-05 09:57:55.000000000 -0600
+++ work-mm5/include/asm-ia64/vga.h 2006-04-05 15:43:09.000000000 -0600
@@ -17,7 +17,8 @@
extern unsigned long vga_console_iobase;
extern unsigned long vga_console_membase;
-#define VGA_MAP_MEM(x) ((unsigned long) ioremap_nocache(vga_console_membase + (x), 0))
+#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap_nocache(vga_console_membase + (x), s))
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#define vga_readb(x) (*(x))
#define vga_writeb(x,y) (*(y) = (x))
Index: work-mm5/include/asm-m32r/vga.h
===================================================================
--- work-mm5.orig/include/asm-m32r/vga.h 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/include/asm-m32r/vga.h 2006-04-05 15:43:22.000000000 -0600
@@ -14,7 +14,8 @@
* access the videoram directly without any black magic.
*/
-#define VGA_MAP_MEM(x) (unsigned long)phys_to_virt(x)
+#define VGA_MAP_MEM(x,s) (unsigned long)phys_to_virt(x)
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#define vga_readb(x) (*(x))
#define vga_writeb(x,y) (*(y) = (x))
Index: work-mm5/include/asm-mips/vga.h
===================================================================
--- work-mm5.orig/include/asm-mips/vga.h 2006-03-23 10:22:17.000000000 -0700
+++ work-mm5/include/asm-mips/vga.h 2006-04-05 15:43:32.000000000 -0600
@@ -13,7 +13,8 @@
* access the videoram directly without any black magic.
*/
-#define VGA_MAP_MEM(x) (0xb0000000L + (unsigned long)(x))
+#define VGA_MAP_MEM(x,s) (0xb0000000L + (unsigned long)(x))
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#define vga_readb(x) (*(x))
#define vga_writeb(x,y) (*(y) = (x))
Index: work-mm5/include/asm-powerpc/vga.h
===================================================================
--- work-mm5.orig/include/asm-powerpc/vga.h 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/include/asm-powerpc/vga.h 2006-04-05 15:43:57.000000000 -0600
@@ -42,9 +42,11 @@
extern unsigned long vgacon_remap_base;
#ifdef __powerpc64__
-#define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0))
+#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap((x), s))
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#else
-#define VGA_MAP_MEM(x) (x + vgacon_remap_base)
+#define VGA_MAP_MEM(x,s) (x + vgacon_remap_base)
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#endif
#define vga_readb(x) (*(x))
Index: work-mm5/include/asm-sparc64/vga.h
===================================================================
--- work-mm5.orig/include/asm-sparc64/vga.h 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/include/asm-sparc64/vga.h 2006-04-05 15:44:08.000000000 -0600
@@ -28,6 +28,7 @@
return *addr;
}
-#define VGA_MAP_MEM(x) (x)
+#define VGA_MAP_MEM(x,s) (x)
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#endif
Index: work-mm5/include/asm-x86_64/vga.h
===================================================================
--- work-mm5.orig/include/asm-x86_64/vga.h 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/include/asm-x86_64/vga.h 2006-04-05 15:44:18.000000000 -0600
@@ -12,7 +12,8 @@
* access the videoram directly without any black magic.
*/
-#define VGA_MAP_MEM(x) (unsigned long)phys_to_virt(x)
+#define VGA_MAP_MEM(x,s) (unsigned long)phys_to_virt(x)
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#define vga_readb(x) (*(x))
#define vga_writeb(x,y) (*(y) = (x))
Index: work-mm5/include/asm-xtensa/vga.h
===================================================================
--- work-mm5.orig/include/asm-xtensa/vga.h 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/include/asm-xtensa/vga.h 2006-04-05 15:44:31.000000000 -0600
@@ -11,7 +11,8 @@
#ifndef _XTENSA_VGA_H
#define _XTENSA_VGA_H
-#define VGA_MAP_MEM(x) (unsigned long)phys_to_virt(x)
+#define VGA_MAP_MEM(x,s) (unsigned long)phys_to_virt(x)
+#define VGA_UNMAP_MEM(x,s) do { } while (0)
#define vga_readb(x) (*(x))
#define vga_writeb(x,y) (*(y) = (x))
Index: work-mm5/drivers/video/console/mdacon.c
===================================================================
--- work-mm5.orig/drivers/video/console/mdacon.c 2006-01-02 20:21:10.000000000 -0700
+++ work-mm5/drivers/video/console/mdacon.c 2006-04-05 15:46:33.000000000 -0600
@@ -313,8 +313,8 @@
mda_num_columns = 80;
mda_num_lines = 25;
- mda_vram_base = VGA_MAP_MEM(0xb0000);
mda_vram_len = 0x01000;
+ mda_vram_base = VGA_MAP_MEM(0xb0000, mda_vram_len);
mda_index_port = 0x3b4;
mda_value_port = 0x3b5;
Index: work-mm5/drivers/video/vga16fb.c
===================================================================
--- work-mm5.orig/drivers/video/vga16fb.c 2006-03-23 10:22:16.000000000 -0700
+++ work-mm5/drivers/video/vga16fb.c 2006-04-05 15:49:34.000000000 -0600
@@ -1351,7 +1351,7 @@
}
/* XXX share VGA_FB_PHYS and I/O region with vgacon and others */
- info->screen_base = (void __iomem *)VGA_MAP_MEM(VGA_FB_PHYS);
+ info->screen_base = (void __iomem *)VGA_MAP_MEM(VGA_FB_PHYS, VGA_FB_PHYS_LEN);
if (!info->screen_base) {
printk(KERN_ERR "vga16fb: unable to map device\n");
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
