/*
* Copyright 2007, 2008 Luc Verhaegen <lverhaegen@novell.com>
* Copyright 2007, 2008 Matthias Hopf <mhopf@novell.com>
* Copyright 2007, 2008 Egbert Eich <eich@novell.com>
* Copyright 2007, 2008 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* MC idling:
*
* For SetupFBLocation and Restore, we require a fully idle MC as we might lock up
* otherwise. Both calls now check whether the MC is Idle before attempting
* to set up the MC, and complain loudly when this fails.
*
* Likely suspect registers for when the Idle fails:
* DxVGA_CONTROL & D1VGA_MODE_ENABLE (run RHDVGADisable beforehand)
* DxCRTC_CONTROL & 0x1 (run DxCRTCDisable beforehand)
* (... Add more here...)
*
*
* MC addressing:
*
* On R600 and up the MC can use a larger than 32bit card internal address for
* its framebuffer. This is why the Address used inside the MC code is a
* CARD64.
*
* rhdPtr->FbIntAddress is kept as a CARD32 for the time being. This is still
* valid, as this makes the R500 code simpler, and since we pick FbIntAddress
* from a 32bit register anyway on R600. FbIntAddress will also correctly cast
* to a CARD64 when passed to the likes of the SetupFBLocation callback.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if HAVE_XF86_ANSIC_H
# include "xf86_ansic.h"
#else
# include <unistd.h>
#endif
#include "xf86.h"
#include "rhd.h"
#include "rhd_regs.h"
#include "rhd_crtc.h" /* for definition of Crtc->Id */
struct rhdMC {
int scrnIndex;
CARD32 FbLocation;
CARD32 HdpFbAddress;
CARD32 MiscLatencyTimer;
Bool Stored;
void (*Save)(struct rhdMC *MC);
void (*Restore)(struct rhdMC *MC);
Bool (*Idle)(struct rhdMC *MC);
CARD64 (*GetFBLocation)(struct rhdMC *MC, CARD32 *size);
void (*SetupFBLocation)(struct rhdMC *MC, CARD64 Address, CARD32 Size);
void (*TuneAccessForDisplay)(struct rhdMC *MC, int crtc,
DisplayModePtr Mode, DisplayModePtr ScaledToMode);
};
/*
* Some common FB location calculations.
*/
/*
* Applicable for all R5xx and RS600, RS690, RS740
*/
static CARD64
R5xxMCGetFBLocation(CARD32 Value, CARD32 *Size)
{
*Size = (Value & 0xFFFF0000) - ((Value & 0xFFFF) << 16);
return (Value & 0xFFFF) << 16;
}
#define R5XX_FB_LOCATION(address, size) \
((((address) + (size)) & 0xFFFF0000) | (((address) >> 16) & 0xFFFF))
#define R5XX_HDP_LOCATION(address) \
(((address) >> 16) & 0xFFFF)
/*
* Applicable for all R6xx and R7xx, and RS780/RS790
*/
static CARD64
R6xxMCGetFBLocation(CARD32 Value, CARD32 *Size)
{
*Size = (((Value & 0xFFFF0000) - ((Value & 0xFFFF) << 16))) << 8;
return (Value & 0xFFFF) << 24;
}
#define R6XX_FB_LOCATION(address, size) \
(((((address) + (size)) >> 8) & 0xFFFF0000) | (((address) >> 24) & 0xFFFF))
#define R6XX_HDP_LOCATION(address) \
((((address) >> 8) & 0x00FF0000))
/*
*
*/
static void
RV515MCSave(struct rhdMC *MC)
{
MC->FbLocation = RHDReadMC(MC, MC_IND_ALL | RV515_MC_FB_LOCATION);
MC->MiscLatencyTimer = RHDReadMC(MC, MC_IND_ALL | RV515_MC_MISC_LAT_TIMER);
MC->HdpFbAddress = RHDRegRead(MC, HDP_FB_LOCATION);
}
/*
*
*/
static void
RV515MCRestore(struct rhdMC *MC)
{
RHDWriteMC(MC, MC_IND_ALL | RV515_MC_FB_LOCATION, MC->FbLocation);
RHDWriteMC(MC, MC_IND_ALL | RV515_MC_MISC_LAT_TIMER, MC->MiscLatencyTimer);
RHDRegWrite(MC, HDP_FB_LOCATION, MC->HdpFbAddress);
}
/*
*
*/
static Bool
RV515MCWaitIdle(struct rhdMC *MC)
{
if (RHDReadMC(MC, MC_IND_ALL | RV515_MC_STATUS) & RV515_MC_IDLE)
return TRUE;
return FALSE;
}
/*
*
*/
static CARD64
RV515MCGetFBLocation(struct rhdMC *MC, CARD32 *Size)
{
return R5xxMCGetFBLocation(RHDReadMC(MC, RV515_MC_FB_LOCATION | MC_IND_ALL), Size);
}
/*
*
*/
static void
RV515MCSetupFBLocation(struct rhdMC *MC, CARD64 Address, CARD32 Size)
{
RHDWriteMC(MC, RV515_MC_FB_LOCATION | MC_IND_ALL,
R5XX_FB_LOCATION(Address, Size));
RHDRegWrite(MC, HDP_FB_LOCATION, R5XX_HDP_LOCATION(Address));
}
/*
*
*/
static void
RV515MCTuneMCAccessForDisplay(struct rhdMC *MC, int Crtc,
DisplayModePtr Mode, DisplayModePtr ScaledToMode)
{
CARD32 value, setting = 0x1;
value = RHDReadMC(MC, RV515_MC_MISC_LAT_TIMER);
if (Crtc == RHD_CRTC_1) {
value &= ~(0x0F << MC_DISP0R_INIT_LAT_SHIFT);
value |= setting << MC_DISP0R_INIT_LAT_SHIFT;
} else { /* RHD_CRTC_2 */
value &= ~(0x0F << MC_DISP1R_INIT_LAT_SHIFT);
value |= setting << MC_DISP1R_INIT_LAT_SHIFT;
}
RHDWriteMC(MC, RV515_MC_MISC_LAT_TIMER, value);
}
/*
*
*/
static void
R500MCSave(struct rhdMC *MC)
{
MC->FbLocation = RHDReadMC(MC, MC_IND_ALL | R5XX_MC_FB_LOCATION);
MC->HdpFbAddress = RHDRegRead(MC, HDP_FB_LOCATION);
}
/*
*
*/
static void
R500MCRestore(struct rhdMC *MC)
{
RHDWriteMC(MC, MC_IND_ALL | R5XX_MC_FB_LOCATION, MC->FbLocation);
RHDRegWrite(MC, HDP_FB_LOCATION, MC->HdpFbAddress);
}
/*
*
*/
static Bool
R500MCWaitIdle(struct rhdMC *MC)
{
if (RHDReadMC(MC, MC_IND_ALL | R5XX_MC_STATUS) & R5XX_MC_IDLE)
return TRUE;
return FALSE;
}
/*
*
*/
static CARD64
R500MCGetFBLocation(struct rhdMC *MC, CARD32 *Size)
{
return R5xxMCGetFBLocation(RHDReadMC(MC, R5XX_MC_FB_LOCATION | MC_IND_ALL), Size);
}
/*
*
*/
static void
R500MCSetupFBLocation(struct rhdMC *MC, CARD64 Address, CARD32 Size)
{
RHDWriteMC(MC, R5XX_MC_FB_LOCATION | MC_IND_ALL,
R5XX_FB_LOCATION(Address, Size));
RHDRegWrite(MC, HDP_FB_LOCATION, R5XX_HDP_LOCATION(Address));
}
/*
*
*/
static void
RS600MCSave(struct rhdMC *MC)
{
MC->FbLocation = RHDReadMC(MC, RS60_NB_FB_LOCATION);
MC->HdpFbAddress = RHDRegRead(MC, HDP_FB_LOCATION);
}
/*
*
*/
static void
RS600MCRestore(struct rhdMC *MC)
{
RHDWriteMC(MC, RS60_NB_FB_LOCATION, MC->FbLocation);
RHDRegWrite(MC, HDP_FB_LOCATION, MC->HdpFbAddress);
}
/*
*
*/
static Bool
RS600MCWaitIdle(struct rhdMC *MC)
{
if (RHDReadMC(MC, RS60_MC_SYSTEM_STATUS) & RS6X_MC_SEQUENCER_IDLE)
return TRUE;
return FALSE;
}
/*
*
*/
static CARD64
RS600MCGetFBLocation(struct rhdMC *MC, CARD32 *Size)
{
return R5xxMCGetFBLocation(RHDReadMC(MC, RS60_NB_FB_LOCATION), Size);
}
/*
*
*/
static void
RS600MCSetupFBLocation(struct rhdMC *MC, CARD64 Address, CARD32 Size)
{
RHDWriteMC(MC, RS60_NB_FB_LOCATION, R5XX_FB_LOCATION(Address, Size));
RHDRegWrite(MC, HDP_FB_LOCATION, R5XX_HDP_LOCATION(Address));
}
/*
*
*/
static void
RS690MCSave(struct rhdMC *MC)
{
MC->FbLocation = RHDReadMC(MC, RS69_MCCFG_FB_LOCATION);
MC->HdpFbAddress = RHDRegRead(MC, HDP_FB_LOCATION);
MC->MiscLatencyTimer = RHDReadMC(MC, RS69_MC_INIT_MISC_LAT_TIMER);
}
/*
*
*/
static void
RS690MCRestore(struct rhdMC *MC)
{
RHDWriteMC(MC, RS69_MCCFG_FB_LOCATION, MC->FbLocation);
RHDRegWrite(MC, HDP_FB_LOCATION, MC->HdpFbAddress);
RHDWriteMC(MC, RS69_MC_INIT_MISC_LAT_TIMER, MC->MiscLatencyTimer);
}
/*
*
*/
static Bool
RS690MCWaitIdle(struct rhdMC *MC)
{
if (RHDReadMC(MC, RS69_MC_SYSTEM_STATUS) & RS6X_MC_SEQUENCER_IDLE)
return TRUE;
return FALSE;
}
/*
*
*/
static CARD64
RS690MCGetFBLocation(struct rhdMC *MC, CARD32 *Size)
{
return R5xxMCGetFBLocation(RHDReadMC(MC, RS69_MCCFG_FB_LOCATION), Size);
}
/*
*
*/
static void
RS690MCSetupFBLocation(struct rhdMC *MC, CARD64 Address, CARD32 Size)
{
RHDWriteMC(MC, RS69_MCCFG_FB_LOCATION, R5XX_FB_LOCATION(Address, Size));
RHDRegWrite(MC, HDP_FB_LOCATION, R5XX_HDP_LOCATION(Address));
}
/*
*
*/
static void
RS690MCTuneMCAccessForDisplay(struct rhdMC *MC, int Crtc,
DisplayModePtr Mode, DisplayModePtr ScaledToMode)
{
CARD32 value, setting = 0x1;
value = RHDReadMC(MC, RS69_MC_INIT_MISC_LAT_TIMER);
if (Crtc == RHD_CRTC_1) {
value &= ~(0x0F << MC_DISP0R_INIT_LAT_SHIFT);
value |= setting << MC_DISP0R_INIT_LAT_SHIFT;
} else { /* RHD_CRTC_2 */
value &= ~(0x0F << MC_DISP1R_INIT_LAT_SHIFT);
value |= setting << MC_DISP1R_INIT_LAT_SHIFT;
}
RHDWriteMC(MC, RS69_MC_INIT_MISC_LAT_TIMER, value);
}
/*
*
*/
static void
R600MCSave(struct rhdMC *MC)
{
MC->FbLocation = RHDRegRead(MC, R6XX_MC_VM_FB_LOCATION);
MC->HdpFbAddress = RHDRegRead(MC, R6XX_HDP_NONSURFACE_BASE);
}
/*
*
*/
static void
R600MCRestore(struct rhdMC *MC)
{
RHDRegWrite(MC, R6XX_MC_VM_FB_LOCATION, MC->FbLocation);
RHDRegWrite(MC, R6XX_HDP_NONSURFACE_BASE, MC->HdpFbAddress);
}
/*
*
*/
static Bool
R600MCWaitIdle(struct rhdMC *MC)
{
if (!(RHDRegRead(MC, SRBM_STATUS) & 0x3f00))
return TRUE;
return FALSE;
}
/*
*
*/
static CARD64
R600MCGetFBLocation(struct rhdMC *MC, CARD32 *Size)
{
return R6xxMCGetFBLocation(RHDRegRead(MC, R6XX_MC_VM_FB_LOCATION), Size);
}
/*
*
*/
static void
R600MCSetupFBLocation(struct rhdMC *MC, CARD64 Address, CARD32 Size)
{
RHDRegWrite(MC, R6XX_MC_VM_FB_LOCATION, R6XX_FB_LOCATION(Address, Size));
RHDRegWrite(MC, R6XX_HDP_NONSURFACE_BASE, R6XX_HDP_LOCATION(Address));
}
/*
*
*/
#ifdef NOTYET
/*
*
*/
static void
RS780MCSave(struct rhdMC *MC)
{
MC->FbLocation = RHDReadMC(MC, RS78_MC_FB_LOCATION);
MC->HdpFbAddress = RHDRegRead(MC, R6XX_HDP_NONSURFACE_BASE);
}
/*
*
*/
static void
RS780MCRestore(struct rhdMC *MC)
{
RHDWriteMC(MC, RS78_MC_FB_LOCATION, MC->FbLocation);
RHDRegWrite(MC, R6XX_HDP_NONSURFACE_BASE, MC->HdpFbAddress);
}
/*
*
*/
static Bool
RS780MCWaitIdle(struct rhdMC *MC)
{
if (RHDReadMC(MC, RS78_MC_SYSTEM_STATUS) & RS78_MC_SEQUENCER_IDLE)
return TRUE;
return FALSE;
}
/*
*
*/
static CARD64
RS780MCGetFBLocation(struct rhdMC *MC, CARD32 *Size)
{
/* is this correct? */
return R5xxMCGetFBLocation(RHDReadMC(MC, RS78_MC_FB_LOCATION), Size);
}
/*
*
*/
static void
RS780MCSetupFBLocation(struct rhdMC *MC, CARD64 Address, CARD32 Size)
{
/* is this correct? */
RHDWriteMC(MC, RS78_MC_FB_LOCATION, R5XX_FB_LOCATION(Address, Size));
RHDRegWrite(MC, R6XX_HDP_NONSURFACE_BASE, R6XX_HDP_LOCATION(Address));
}
#endif /* NOTYET */
/*
*
*/
static void
R700MCSave(struct rhdMC *MC)
{
MC->FbLocation = RHDRegRead(MC, R7XX_MC_VM_FB_LOCATION);
MC->HdpFbAddress = RHDRegRead(MC, R6XX_HDP_NONSURFACE_BASE);
}
/*
*
*/
static void
R700MCRestore(struct rhdMC *MC)
{
RHDFUNC(MC);
RHDRegWrite(MC, R7XX_MC_VM_FB_LOCATION, MC->FbLocation);
RHDRegWrite(MC, R6XX_HDP_NONSURFACE_BASE, MC->HdpFbAddress);
}
/*
* Idle is the R600 one...
*/
/*
*
*/
static CARD64
R700MCGetFBLocation(struct rhdMC *MC, CARD32 *Size)
{
return R6xxMCGetFBLocation(RHDRegRead(MC, R7XX_MC_VM_FB_LOCATION), Size);
}
/*
*
*/
static void
R700MCSetupFBLocation(struct rhdMC *MC, CARD64 Address, CARD32 Size)
{
RHDRegWrite(MC, R7XX_MC_VM_FB_LOCATION, R6XX_FB_LOCATION(Address, Size));
RHDRegWrite(MC, R6XX_HDP_NONSURFACE_BASE, R6XX_HDP_LOCATION(Address));
}
/*
*
*/
void
RHDMCInit(RHDPtr rhdPtr)
{
struct rhdMC *MC;
RHDFUNC(rhdPtr);
/* These devices have an internal address reference, which some other
* address registers in there also use. This can be different from the
* address in the BAR.
*
* We read out the address here from some known location. This address
* is as good a guess as any, we just need to pick one, but then make
* sure that it is made consistent in MCSetupFBLocation and the various MC
* accessing subsystems.
*/
RHDDebug(rhdPtr->scrnIndex, "MC FB Address: 0x%08X.\n",
rhdPtr->FbIntAddress);
MC = xnfcalloc(1, sizeof(struct rhdMC));
MC->scrnIndex = rhdPtr->scrnIndex;
if (rhdPtr->ChipSet < RHD_RS600) {
switch(rhdPtr->ChipSet) {
case RHD_RV515:
case RHD_RV505:
case RHD_RV516:
case RHD_RV550:
case RHD_M52:
case RHD_M54:
case RHD_M62:
case RHD_M64:
case RHD_M71:
MC->Save = RV515MCSave;
MC->Restore = RV515MCRestore;
MC->SetupFBLocation = RV515MCSetupFBLocation;
MC->GetFBLocation = RV515MCGetFBLocation;
MC->Idle = RV515MCWaitIdle;
MC->TuneAccessForDisplay = RV515MCTuneMCAccessForDisplay;
break;
default:
MC->Save = R500MCSave;
MC->Restore = R500MCRestore;
MC->SetupFBLocation = R500MCSetupFBLocation;
MC->GetFBLocation = R500MCGetFBLocation;
MC->Idle = R500MCWaitIdle;
break;
}
} else if (rhdPtr->ChipSet == RHD_RS600) {
MC->Save = RS600MCSave;
MC->Restore = RS600MCRestore;
MC->SetupFBLocation = RS600MCSetupFBLocation;
MC->Idle = RS600MCWaitIdle;
MC->GetFBLocation = RS600MCGetFBLocation;
} else if (rhdPtr->ChipSet < RHD_R600) {
MC->Save = RS690MCSave;
MC->Restore = RS690MCRestore;
MC->SetupFBLocation = RS690MCSetupFBLocation;
MC->Idle = RS690MCWaitIdle;
MC->GetFBLocation = RS690MCGetFBLocation;
MC->TuneAccessForDisplay = RS690MCTuneMCAccessForDisplay;
} else if (rhdPtr->ChipSet <= RHD_RS780) {
MC->Save = R600MCSave;
MC->Restore = R600MCRestore;
MC->SetupFBLocation = R600MCSetupFBLocation;
MC->Idle = R600MCWaitIdle;
MC->GetFBLocation = R600MCGetFBLocation;
}
#ifdef NOTYET
else if (rhdPtr->ChipSet == RHD_RS780) {
MC->Save = RS780MCSave;
MC->Restore = RS780MCRestore;
MC->SetupFBLocation = RS780MCSetupFBLocation;
MC->Idle = RS780MCWaitIdle;
MC->GetFBLocation = RS780MCGetFBLocation;
}
#endif /* NOTYET */
else if (rhdPtr->ChipSet >= RHD_RV770) {
MC->Save = R700MCSave;
MC->Restore = R700MCRestore;
MC->SetupFBLocation = R700MCSetupFBLocation;
MC->Idle = R600MCWaitIdle;
MC->GetFBLocation = R700MCGetFBLocation;
} else {
xf86DrvMsg(rhdPtr->scrnIndex, X_ERROR, "I don't know anything about MC on this chipset\n");
xfree(MC);
return;
}
if (rhdPtr->ChipSet < RHD_R600)
rhdPtr->FbIntAddress = RHDRegRead(rhdPtr, HDP_FB_LOCATION) << 16;
else
rhdPtr->FbIntAddress = RHDRegRead(rhdPtr, R6XX_CONFIG_FB_BASE);
MC->GetFBLocation(MC, &rhdPtr->FbIntSize);
rhdPtr->MC = MC;
}
/*
* Free structure.
*/
void
RHDMCDestroy(RHDPtr rhdPtr)
{
RHDFUNC(rhdPtr);
if (!rhdPtr->MC)
return;
xfree(rhdPtr->MC);
rhdPtr->MC = NULL;
}
/*
*
*/
void
RHDMCSave(RHDPtr rhdPtr)
{
struct rhdMC *MC = rhdPtr->MC;
ASSERT(MC);
RHDFUNC(rhdPtr);
MC->Save(MC);
MC->Stored = TRUE;
}
/*
* Make sure that nothing is accessing memory anymore before calling this.
*/
void
RHDMCRestore(RHDPtr rhdPtr)
{
struct rhdMC *MC = rhdPtr->MC;
// ASSERT(MC);
// RHD_UNSETDEBUGFLAG(rhdPtr, MC_SETUP);
RHDFUNC(rhdPtr);
if (!MC->Stored) {
xf86DrvMsg(rhdPtr->scrnIndex, X_ERROR,
"%s: trying to restore uninitialized values.\n",__func__);
return;
}
if (MC->Idle(MC))
MC->Restore(MC);
else
xf86DrvMsg(rhdPtr->scrnIndex, X_ERROR,
"%s: MC is still not idle!!!\n", __func__);
}
/*
*
*/
Bool
RHDMCIdleWait(RHDPtr rhdPtr, CARD32 count)
{
struct rhdMC *MC = rhdPtr->MC;
RHDFUNC(rhdPtr);
ASSERT(MC);
do {
if (MC->Idle(MC))
return TRUE;
usleep(100);
} while (count--);
RHDDebug(rhdPtr->scrnIndex, "%s: MC not idle\n",__func__);
return FALSE;
}
/*
* Get FB location and size.
*/
CARD64
RHDMCGetFBLocation(RHDPtr rhdPtr, CARD32 *size)
{
struct rhdMC *MC = rhdPtr->MC;
// ASSERT(MC);
// ASSERT(size);
RHDFUNC(rhdPtr);
return MC->GetFBLocation(MC, size);
}
/*
* Make sure that nothing is accessing memory anymore before calling this.
*/
Bool
RHDMCSetupFBLocation(RHDPtr rhdPtr, CARD64 Address, CARD32 Size)
{
struct rhdMC *MC = rhdPtr->MC;
CARD64 OldAddress;
CARD32 OldSize;
// ASSERT(MC);
// RHD_SETDEBUGFLAG(rhdPtr, MC_SETUP);
RHDFUNC(rhdPtr);
if (!MC->Idle(MC)) {
xf86DrvMsg(rhdPtr->scrnIndex, X_ERROR,
"%s: Cannot setup MC: not idle!!!\n", __func__);
return FALSE;
}
OldAddress = MC->GetFBLocation(MC, &OldSize);
if (OldAddress == Address && OldSize == Size)
return TRUE;
/* If this ever occurs, we might have issues */
if (OldAddress >> 32)
xf86DrvMsg(rhdPtr->scrnIndex, X_WARNING, "%s: Board claims to use a "
"higher than 32bit address for its FB\n", __func__);
RHDDebug(rhdPtr->scrnIndex,
"Setting MC from 0x%08X to 0x%08X [Size 0x%08X]\n",
OldAddress, rhdPtr->FbIntAddress, Size);
MC->SetupFBLocation(MC, Address, Size);
return TRUE;
}
/*
*
*/
void
RHDMCTuneAccessForDisplay(RHDPtr rhdPtr, int Crtc,
DisplayModePtr Mode, DisplayModePtr ScaledToMode)
{
struct rhdMC *MC = rhdPtr->MC;
ASSERT(MC);
RHDFUNC(rhdPtr);
if (MC->TuneAccessForDisplay)
MC->TuneAccessForDisplay(MC, Crtc, Mode, ScaledToMode);
}
/*
*
*/
Bool
RHD_MC_IGP_SideportMemoryPresent(RHDPtr rhdPtr)
{
Bool Present = FALSE;
RHDFUNC(rhdPtr);
switch (rhdPtr->ChipSet) {
case RHD_RS690:
case RHD_RS740:
Present = (RHDReadMC(rhdPtr, RS69_MC_MISC_UMA_CNTL) & RS69_SIDE_PORT_PRESENT_R) != 0;
break;
case RHD_RS780:
Present = (RHDReadMC(rhdPtr, RS78_MC_MISC_UMA_CNTL) & RS78_SIDE_PORT_PRESENT_R) != 0;
break;
default:
break;
}
xf86DrvMsg(rhdPtr->scrnIndex, X_INFO, "IGP sideport memory %s present.\n", Present ? "" : "not");
return Present;
}