[PATCH] xfree86: Add Loongson MIPS support

[Jeremy Huddleston]

This version of the patch also isn't complete because ioBase_phys is an unsigned int.  It allows iobases in the 0x1000000-0xFFFFFFFF range to work, but not 0x100000000 and higher.  The followup 2-part series I just sent should work even if __NR_pciconfig_iobase is higher.

The long term fix is to not use these interfaces, but we might as well fix them for the legacy support until they're gone.


On Oct 14, 2011, at 5:10 AM, Matt Kraai wrote:

> Change IOPortBase to ioBase and set it properly on MIPS systems.
> 
> Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=41038
> Signed-off-by: Matt Kraai <kraai at ftbfs.org>
> ---
> hw/xfree86/common/compiler.h            |   14 +++++++-------
> hw/xfree86/os-support/bsd/arm_video.c   |   20 ++++++++++----------
> hw/xfree86/os-support/linux/lnx_video.c |    9 +++++++--
> 3 files changed, 24 insertions(+), 19 deletions(-)
> 
> diff --git a/hw/xfree86/common/compiler.h b/hw/xfree86/common/compiler.h
> index 9e00d75..61af0c4 100644
> --- a/hw/xfree86/common/compiler.h
> +++ b/hw/xfree86/common/compiler.h
> @@ -714,42 +714,42 @@ xf86WriteMmio32LeNB(__volatile__ void *base, const unsigned long offset,
> #     define PORT_SIZE short
> #    endif
> 
> -_X_EXPORT unsigned int IOPortBase;  /* Memory mapped I/O port area */
> +_X_EXPORT unsigned char *ioBase;
> 
> static __inline__ void
> outb(unsigned PORT_SIZE port, unsigned char val)
> {
> -	*(volatile unsigned char*)(((unsigned PORT_SIZE)(port))+IOPortBase) = val;
> +	*(volatile unsigned char*)(((unsigned PORT_SIZE)(port))+ioBase) = val;
> }
> 
> static __inline__ void
> outw(unsigned PORT_SIZE port, unsigned short val)
> {
> -	*(volatile unsigned short*)(((unsigned PORT_SIZE)(port))+IOPortBase) = val;
> +	*(volatile unsigned short*)(((unsigned PORT_SIZE)(port))+ioBase) = val;
> }
> 
> static __inline__ void
> outl(unsigned PORT_SIZE port, unsigned int val)
> {
> -	*(volatile unsigned int*)(((unsigned PORT_SIZE)(port))+IOPortBase) = val;
> +	*(volatile unsigned int*)(((unsigned PORT_SIZE)(port))+ioBase) = val;
> }
> 
> static __inline__ unsigned int
> inb(unsigned PORT_SIZE port)
> {
> -	return *(volatile unsigned char*)(((unsigned PORT_SIZE)(port))+IOPortBase);
> +	return *(volatile unsigned char*)(((unsigned PORT_SIZE)(port))+ioBase);
> }
> 
> static __inline__ unsigned int
> inw(unsigned PORT_SIZE port)
> {
> -	return *(volatile unsigned short*)(((unsigned PORT_SIZE)(port))+IOPortBase);
> +	return *(volatile unsigned short*)(((unsigned PORT_SIZE)(port))+ioBase);
> }
> 
> static __inline__ unsigned int
> inl(unsigned PORT_SIZE port)
> {
> -	return *(volatile unsigned int*)(((unsigned PORT_SIZE)(port))+IOPortBase);
> +	return *(volatile unsigned int*)(((unsigned PORT_SIZE)(port))+ioBase);
> }
> 
> 
> diff --git a/hw/xfree86/os-support/bsd/arm_video.c b/hw/xfree86/os-support/bsd/arm_video.c
> index eb631a7..2bc6d3b 100644
> --- a/hw/xfree86/os-support/bsd/arm_video.c
> +++ b/hw/xfree86/os-support/bsd/arm_video.c
> @@ -495,7 +495,7 @@ xf86EnableIO()
> 				MAP_FLAGS, fd, (off_t)0x0000);
> 
> 		if (base != (pointer)-1) {
> -			IOPortBase = base;
> +			ioBase = base;
> 		}
> 		else {
> 			xf86Msg(X_WARNING,"EnableIO: failed to mmap %s (%s)\n",
> @@ -562,7 +562,7 @@ int ScreenNum;
> 				MAP_FLAGS, fd, (off_t)0x0000);
> 
> 		if (base != (pointer)-1) {
> -			IOPortBase = base;
> +			ioBase = base;
> 		}
> 		else {
> 			xf86Msg(X_ERROR,
> @@ -577,20 +577,20 @@ int ScreenNum;
> #endif
> 
> #ifdef __arm32__
> -	IOPortBase = (unsigned int)-1;
> +	ioBase = (unsigned char *)-1;
> 
> 	if((memInfoP = checkMapInfo(TRUE, MMIO_REGION)) != NULL)
> 	{
> 	    /* 
> 	     * xf86MapInfoMap maps an offset from the start of video IO
> -	     * space (e.g. 0x3B0), but IOPortBase is expected to map to
> +	     * space (e.g. 0x3B0), but ioBase is expected to map to
> 	     * physical address 0x000, so subtract the start of video I/O
> 	     * space from the result.  This is safe for now becase we
> 	     * actually mmap the start of the page, then the start of video
> 	     * I/O space is added as an internal offset.
> 	     */
> -	    IOPortBase = (unsigned int)xf86MapInfoMap(memInfoP,
> -						      (caddr_t)0x0, 0L) 
> +	    ioBase = (unsigned char *)xf86MapInfoMap(memInfoP,
> +						     (caddr_t)0x0, 0L)
> 		- memInfoP->memInfo.u.map_info_mmap.internal_offset;
> 	    ExtendedEnabled = TRUE;
> 	    return TRUE;
> @@ -604,10 +604,10 @@ int ScreenNum;
> 				 MAP_FLAGS, devMemFd, (off_t)DEV_MEM_IOBASE);
> 
> 	    if (base != (pointer)-1)
> -		IOPortBase = (unsigned int)base;
> +		ioBase = base;
> 	}
> 
> -        if (IOPortBase == (unsigned int)-1)
> +        if (ioBase == (unsigned char *)-1)
> 	{	
> 	    xf86Msg(X_WARNING,"xf86EnableIOPorts: failed to open mem device or map IO base. \n\
> Make sure you have the Aperture Driver installed, or a kernel built with the INSECURE option\n");
> @@ -652,8 +652,8 @@ int ScreenNum;
> 		if (ScreenEnabled[i])
> 			return;
> 
> -	munmap((caddr_t)IOPortBase, 0x400);
> -	IOPortBase = (unsigned int)-1;
> +	munmap((caddr_t)ioBase, 0x400);
> +	ioBase = (unsigned char *)-1;
> 	ExtendedEnabled = FALSE;
> #endif
> 
> diff --git a/hw/xfree86/os-support/linux/lnx_video.c b/hw/xfree86/os-support/linux/lnx_video.c
> index 3d45511..48a3f76 100644
> --- a/hw/xfree86/os-support/linux/lnx_video.c
> +++ b/hw/xfree86/os-support/linux/lnx_video.c
> @@ -493,7 +493,7 @@ volatile unsigned char *ioBase = NULL;
> Bool
> xf86EnableIO(void)
> {
> -#if defined(__powerpc__)
> +#if defined(__mips__) || defined(__powerpc__)
> 	int fd;
> 	unsigned int ioBase_phys;
> #endif
> @@ -501,8 +501,13 @@ xf86EnableIO(void)
> 	if (ExtendedEnabled)
> 		return TRUE;
> 
> -#if defined(__powerpc__)
> +#if defined(__mips__) || defined(__powerpc__)
> +
> +# if defined(__mips__)
> +	ioBase_phys = 0x1fd00000;
> +# elif defined(__powerpc__)
> 	ioBase_phys = syscall(__NR_pciconfig_iobase, 2, 0, 0);
> +# endif
> 
> 	fd = open("/dev/mem", O_RDWR);
> 	if (ioBase == NULL) {
> -- 
> 1.7.7
> 
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