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 - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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