drivers/gpu/drm/radeon/rs600.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright 2008 Advanced Micro Devices, Inc.
  * Copyright 2008 Red Hat Inc.
  * Copyright 2009 Jerome Glisse.
  *
  * 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.
  *
  * Authors: Dave Airlie
  *          Alex Deucher
  *          Jerome Glisse
  */
 #include "drmP.h"
 #include "radeon_reg.h"
 #include "radeon.h"

 /* rs600 depends on : */
 void r100_hdp_reset(struct radeon_device *rdev);
 int r100_gui_wait_for_idle(struct radeon_device *rdev);
 int r300_mc_wait_for_idle(struct radeon_device *rdev);
 void r420_pipes_init(struct radeon_device *rdev);

 /* This files gather functions specifics to :
  * rs600
  *
  * Some of these functions might be used by newer ASICs.
  */
 void rs600_gpu_init(struct radeon_device *rdev);
 int rs600_mc_wait_for_idle(struct radeon_device *rdev);
 void rs600_disable_vga(struct radeon_device *rdev);


 /*
  * GART.
  */
 void rs600_gart_tlb_flush(struct radeon_device *rdev)
 {
 	uint32_t tmp;

 	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
 	tmp &= ~(RS600_INVALIDATE_ALL_L1_TLBS | RS600_INVALIDATE_L2_CACHE);
 	WREG32_MC(RS600_MC_PT0_CNTL, tmp);

 	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
 	tmp |= RS600_INVALIDATE_ALL_L1_TLBS | RS600_INVALIDATE_L2_CACHE;
 	WREG32_MC(RS600_MC_PT0_CNTL, tmp);

 	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
 	tmp &= ~(RS600_INVALIDATE_ALL_L1_TLBS | RS600_INVALIDATE_L2_CACHE);
 	WREG32_MC(RS600_MC_PT0_CNTL, tmp);
 	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
 }

 int rs600_gart_enable(struct radeon_device *rdev)
 {
 	uint32_t tmp;
 	int i;
 	int r;

 	/* Initialize common gart structure */
 	r = radeon_gart_init(rdev);
 	if (r) {
 		return r;
 	}
 	rdev->gart.table_size = rdev->gart.num_gpu_pages * 8;
 	r = radeon_gart_table_vram_alloc(rdev);
 	if (r) {
 		return r;
 	}
 	/* FIXME: setup default page */
 	WREG32_MC(RS600_MC_PT0_CNTL,
 		 (RS600_EFFECTIVE_L2_CACHE_SIZE(6) |
 		  RS600_EFFECTIVE_L2_QUEUE_SIZE(6)));
 	for (i = 0; i < 19; i++) {
 		WREG32_MC(RS600_MC_PT0_CLIENT0_CNTL + i,
 			 (RS600_ENABLE_TRANSLATION_MODE_OVERRIDE |
 			  RS600_SYSTEM_ACCESS_MODE_IN_SYS |
 			  RS600_SYSTEM_APERTURE_UNMAPPED_ACCESS_DEFAULT_PAGE |
 			  RS600_EFFECTIVE_L1_CACHE_SIZE(3) |
 			  RS600_ENABLE_FRAGMENT_PROCESSING |
 			  RS600_EFFECTIVE_L1_QUEUE_SIZE(3)));
 	}

 	/* System context map to GART space */
 	WREG32_MC(RS600_MC_PT0_SYSTEM_APERTURE_LOW_ADDR, rdev->mc.gtt_location);
 	tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
 	WREG32_MC(RS600_MC_PT0_SYSTEM_APERTURE_HIGH_ADDR, tmp);

 	/* enable first context */
 	WREG32_MC(RS600_MC_PT0_CONTEXT0_FLAT_START_ADDR, rdev->mc.gtt_location);
 	tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
 	WREG32_MC(RS600_MC_PT0_CONTEXT0_FLAT_END_ADDR, tmp);
 	WREG32_MC(RS600_MC_PT0_CONTEXT0_CNTL,
 		 (RS600_ENABLE_PAGE_TABLE | RS600_PAGE_TABLE_TYPE_FLAT));
 	/* disable all other contexts */
 	for (i = 1; i < 8; i++) {
 		WREG32_MC(RS600_MC_PT0_CONTEXT0_CNTL + i, 0);
 	}

 	/* setup the page table */
 	WREG32_MC(RS600_MC_PT0_CONTEXT0_FLAT_BASE_ADDR,
 		 rdev->gart.table_addr);
 	WREG32_MC(RS600_MC_PT0_CONTEXT0_DEFAULT_READ_ADDR, 0);

 	/* enable page tables */
 	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
 	WREG32_MC(RS600_MC_PT0_CNTL, (tmp | RS600_ENABLE_PT));
 	tmp = RREG32_MC(RS600_MC_CNTL1);
 	WREG32_MC(RS600_MC_CNTL1, (tmp | RS600_ENABLE_PAGE_TABLES));
 	rs600_gart_tlb_flush(rdev);
 	rdev->gart.ready = true;
 	return 0;
 }

 void rs600_gart_disable(struct radeon_device *rdev)
 {
 	uint32_t tmp;

 	/* FIXME: disable out of gart access */
 	WREG32_MC(RS600_MC_PT0_CNTL, 0);
 	tmp = RREG32_MC(RS600_MC_CNTL1);
 	tmp &= ~RS600_ENABLE_PAGE_TABLES;
 	WREG32_MC(RS600_MC_CNTL1, tmp);
 	radeon_object_kunmap(rdev->gart.table.vram.robj);
 	radeon_object_unpin(rdev->gart.table.vram.robj);
 }

 #define R600_PTE_VALID     (1 << 0)
 #define R600_PTE_SYSTEM    (1 << 1)
 #define R600_PTE_SNOOPED   (1 << 2)
 #define R600_PTE_READABLE  (1 << 5)
 #define R600_PTE_WRITEABLE (1 << 6)

 int rs600_gart_set_page(struct radeon_device *rdev, int i, uint64_t addr)
 {
 	void __iomem *ptr = (void *)rdev->gart.table.vram.ptr;

 	if (i < 0 || i > rdev->gart.num_gpu_pages) {
 		return -EINVAL;
 	}
 	addr = addr & 0xFFFFFFFFFFFFF000ULL;
 	addr |= R600_PTE_VALID | R600_PTE_SYSTEM | R600_PTE_SNOOPED;
 	addr |= R600_PTE_READABLE | R600_PTE_WRITEABLE;
 	writeq(addr, ((void __iomem *)ptr) + (i * 8));
 	return 0;
 }


 /*
  * MC.
  */
 void rs600_mc_disable_clients(struct radeon_device *rdev)
 {
 	unsigned tmp;

 	if (r100_gui_wait_for_idle(rdev)) {
 		printk(KERN_WARNING "Failed to wait GUI idle while "
 		       "programming pipes. Bad things might happen.\n");
 	}

 	tmp = RREG32(AVIVO_D1VGA_CONTROL);
 	WREG32(AVIVO_D1VGA_CONTROL, tmp & ~AVIVO_DVGA_CONTROL_MODE_ENABLE);
 	tmp = RREG32(AVIVO_D2VGA_CONTROL);
 	WREG32(AVIVO_D2VGA_CONTROL, tmp & ~AVIVO_DVGA_CONTROL_MODE_ENABLE);

 	tmp = RREG32(AVIVO_D1CRTC_CONTROL);
 	WREG32(AVIVO_D1CRTC_CONTROL, tmp & ~AVIVO_CRTC_EN);
 	tmp = RREG32(AVIVO_D2CRTC_CONTROL);
 	WREG32(AVIVO_D2CRTC_CONTROL, tmp & ~AVIVO_CRTC_EN);

 	/* make sure all previous write got through */
 	tmp = RREG32(AVIVO_D2CRTC_CONTROL);

 	mdelay(1);
 }

 int rs600_mc_init(struct radeon_device *rdev)
 {
 	uint32_t tmp;
 	int r;

 	if (r100_debugfs_rbbm_init(rdev)) {
 		DRM_ERROR("Failed to register debugfs file for RBBM !\n");
 	}

 	rs600_gpu_init(rdev);
 	rs600_gart_disable(rdev);

 	/* Setup GPU memory space */
 	rdev->mc.vram_location = 0xFFFFFFFFUL;
 	rdev->mc.gtt_location = 0xFFFFFFFFUL;
 	r = radeon_mc_setup(rdev);
 	if (r) {
 		return r;
 	}

 	/* Program GPU memory space */
 	/* Enable bus master */
 	tmp = RREG32(RADEON_BUS_CNTL) & ~RS600_BUS_MASTER_DIS;
 	WREG32(RADEON_BUS_CNTL, tmp);
 	/* FIXME: What does AGP means for such chipset ? */
 	WREG32_MC(RS600_MC_AGP_LOCATION, 0x0FFFFFFF);
 	/* FIXME: are this AGP reg in indirect MC range ? */
 	WREG32_MC(RS600_MC_AGP_BASE, 0);
 	WREG32_MC(RS600_MC_AGP_BASE_2, 0);
 	rs600_mc_disable_clients(rdev);
 	if (rs600_mc_wait_for_idle(rdev)) {
 		printk(KERN_WARNING "Failed to wait MC idle while "
 		       "programming pipes. Bad things might happen.\n");
 	}
 	tmp = rdev->mc.vram_location + rdev->mc.vram_size - 1;
 	tmp = REG_SET(RS600_MC_FB_TOP, tmp >> 16);
 	tmp |= REG_SET(RS600_MC_FB_START, rdev->mc.vram_location >> 16);
 	WREG32_MC(RS600_MC_FB_LOCATION, tmp);
 	WREG32(RS690_HDP_FB_LOCATION, rdev->mc.vram_location >> 16);
 	return 0;
 }

 void rs600_mc_fini(struct radeon_device *rdev)
 {
 	rs600_gart_disable(rdev);
 	radeon_gart_table_vram_free(rdev);
 	radeon_gart_fini(rdev);
 }


 /*
  * Global GPU functions
  */
 void rs600_disable_vga(struct radeon_device *rdev)
 {
 	unsigned tmp;

 	WREG32(0x330, 0);
 	WREG32(0x338, 0);
 	tmp = RREG32(0x300);
 	tmp &= ~(3 << 16);
 	WREG32(0x300, tmp);
 	WREG32(0x308, (1 << 8));
 	WREG32(0x310, rdev->mc.vram_location);
 	WREG32(0x594, 0);
 }

 int rs600_mc_wait_for_idle(struct radeon_device *rdev)
 {
 	unsigned i;
 	uint32_t tmp;

 	for (i = 0; i < rdev->usec_timeout; i++) {
 		/* read MC_STATUS */
 		tmp = RREG32_MC(RS600_MC_STATUS);
 		if (tmp & RS600_MC_STATUS_IDLE) {
 			return 0;
 		}
 		DRM_UDELAY(1);
 	}
 	return -1;
 }

 void rs600_errata(struct radeon_device *rdev)
 {
 	rdev->pll_errata = 0;
 }

 void rs600_gpu_init(struct radeon_device *rdev)
 {
 	/* FIXME: HDP same place on rs600 ? */
 	r100_hdp_reset(rdev);
 	rs600_disable_vga(rdev);
 	/* FIXME: is this correct ? */
 	r420_pipes_init(rdev);
 	if (rs600_mc_wait_for_idle(rdev)) {
 		printk(KERN_WARNING "Failed to wait MC idle while "
 		       "programming pipes. Bad things might happen.\n");
 	}
 }


 /*
  * VRAM info.
  */
 void rs600_vram_info(struct radeon_device *rdev)
 {
 	/* FIXME: to do or is these values sane ? */
 	rdev->mc.vram_is_ddr = true;
 	rdev->mc.vram_width = 128;
 }


 /*
  * Indirect registers accessor
  */
 uint32_t rs600_mc_rreg(struct radeon_device *rdev, uint32_t reg)
 {
 	uint32_t r;

 	WREG32(RS600_MC_INDEX,
 	       ((reg & RS600_MC_ADDR_MASK) | RS600_MC_IND_CITF_ARB0));
 	r = RREG32(RS600_MC_DATA);
 	return r;
 }

 void rs600_mc_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v)
 {
 	WREG32(RS600_MC_INDEX,
 		RS600_MC_IND_WR_EN | RS600_MC_IND_CITF_ARB0 |
 		((reg) & RS600_MC_ADDR_MASK));
 	WREG32(RS600_MC_DATA, v);
 }
	/*
	* Copyright 2008 Advanced Micro Devices, Inc.
	* Copyright 2008 Red Hat Inc.
	* Copyright 2009 Jerome Glisse.
	*
	* 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.
	*
	* Authors: Dave Airlie
	* Alex Deucher
	* Jerome Glisse
	*/
	#include "drmP.h"
	#include "radeon_reg.h"
	#include "radeon.h"

	/* rs600 depends on : */
	void r100_hdp_reset(struct radeon_device *rdev);
	int r100_gui_wait_for_idle(struct radeon_device *rdev);
	int r300_mc_wait_for_idle(struct radeon_device *rdev);
	void r420_pipes_init(struct radeon_device *rdev);

	/* This files gather functions specifics to :
	* rs600
	*
	* Some of these functions might be used by newer ASICs.
	*/
	void rs600_gpu_init(struct radeon_device *rdev);
	int rs600_mc_wait_for_idle(struct radeon_device *rdev);
	void rs600_disable_vga(struct radeon_device *rdev);


	/*
	* GART.
	*/
	void rs600_gart_tlb_flush(struct radeon_device *rdev)
	{
	uint32_t tmp;

	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
	tmp &= ~(RS600_INVALIDATE_ALL_L1_TLBS \| RS600_INVALIDATE_L2_CACHE);
	WREG32_MC(RS600_MC_PT0_CNTL, tmp);

	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
	tmp \|= RS600_INVALIDATE_ALL_L1_TLBS \| RS600_INVALIDATE_L2_CACHE;
	WREG32_MC(RS600_MC_PT0_CNTL, tmp);

	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
	tmp &= ~(RS600_INVALIDATE_ALL_L1_TLBS \| RS600_INVALIDATE_L2_CACHE);
	WREG32_MC(RS600_MC_PT0_CNTL, tmp);
	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
	}

	int rs600_gart_enable(struct radeon_device *rdev)
	{
	uint32_t tmp;
	int i;
	int r;

	/* Initialize common gart structure */
	r = radeon_gart_init(rdev);
	if (r) {
	return r;
	}
	rdev->gart.table_size = rdev->gart.num_gpu_pages * 8;
	r = radeon_gart_table_vram_alloc(rdev);
	if (r) {
	return r;
	}
	/* FIXME: setup default page */
	WREG32_MC(RS600_MC_PT0_CNTL,
	(RS600_EFFECTIVE_L2_CACHE_SIZE(6) \|
	RS600_EFFECTIVE_L2_QUEUE_SIZE(6)));
	for (i = 0; i < 19; i++) {
	WREG32_MC(RS600_MC_PT0_CLIENT0_CNTL + i,
	(RS600_ENABLE_TRANSLATION_MODE_OVERRIDE \|
	RS600_SYSTEM_ACCESS_MODE_IN_SYS \|
	RS600_SYSTEM_APERTURE_UNMAPPED_ACCESS_DEFAULT_PAGE \|
	RS600_EFFECTIVE_L1_CACHE_SIZE(3) \|
	RS600_ENABLE_FRAGMENT_PROCESSING \|
	RS600_EFFECTIVE_L1_QUEUE_SIZE(3)));
	}

	/* System context map to GART space */
	WREG32_MC(RS600_MC_PT0_SYSTEM_APERTURE_LOW_ADDR, rdev->mc.gtt_location);
	tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
	WREG32_MC(RS600_MC_PT0_SYSTEM_APERTURE_HIGH_ADDR, tmp);

	/* enable first context */
	WREG32_MC(RS600_MC_PT0_CONTEXT0_FLAT_START_ADDR, rdev->mc.gtt_location);
	tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
	WREG32_MC(RS600_MC_PT0_CONTEXT0_FLAT_END_ADDR, tmp);
	WREG32_MC(RS600_MC_PT0_CONTEXT0_CNTL,
	(RS600_ENABLE_PAGE_TABLE \| RS600_PAGE_TABLE_TYPE_FLAT));
	/* disable all other contexts */
	for (i = 1; i < 8; i++) {
	WREG32_MC(RS600_MC_PT0_CONTEXT0_CNTL + i, 0);
	}

	/* setup the page table */
	WREG32_MC(RS600_MC_PT0_CONTEXT0_FLAT_BASE_ADDR,
	rdev->gart.table_addr);
	WREG32_MC(RS600_MC_PT0_CONTEXT0_DEFAULT_READ_ADDR, 0);

	/* enable page tables */
	tmp = RREG32_MC(RS600_MC_PT0_CNTL);
	WREG32_MC(RS600_MC_PT0_CNTL, (tmp \| RS600_ENABLE_PT));
	tmp = RREG32_MC(RS600_MC_CNTL1);
	WREG32_MC(RS600_MC_CNTL1, (tmp \| RS600_ENABLE_PAGE_TABLES));
	rs600_gart_tlb_flush(rdev);
	rdev->gart.ready = true;
	return 0;
	}

	void rs600_gart_disable(struct radeon_device *rdev)
	{
	uint32_t tmp;

	/* FIXME: disable out of gart access */
	WREG32_MC(RS600_MC_PT0_CNTL, 0);
	tmp = RREG32_MC(RS600_MC_CNTL1);
	tmp &= ~RS600_ENABLE_PAGE_TABLES;
	WREG32_MC(RS600_MC_CNTL1, tmp);
	radeon_object_kunmap(rdev->gart.table.vram.robj);
	radeon_object_unpin(rdev->gart.table.vram.robj);
	}

	#define R600_PTE_VALID (1 << 0)
	#define R600_PTE_SYSTEM (1 << 1)
	#define R600_PTE_SNOOPED (1 << 2)
	#define R600_PTE_READABLE (1 << 5)
	#define R600_PTE_WRITEABLE (1 << 6)

	int rs600_gart_set_page(struct radeon_device *rdev, int i, uint64_t addr)
	{
	void __iomem ptr = (void )rdev->gart.table.vram.ptr;

	if (i < 0 \|\| i > rdev->gart.num_gpu_pages) {
	return -EINVAL;
	}
	addr = addr & 0xFFFFFFFFFFFFF000ULL;
	addr \|= R600_PTE_VALID \| R600_PTE_SYSTEM \| R600_PTE_SNOOPED;
	addr \|= R600_PTE_READABLE \| R600_PTE_WRITEABLE;
	writeq(addr, ((void __iomem )ptr) + (i 8));
	return 0;
	}


	/*
	* MC.
	*/
	void rs600_mc_disable_clients(struct radeon_device *rdev)
	{
	unsigned tmp;

	if (r100_gui_wait_for_idle(rdev)) {
	printk(KERN_WARNING "Failed to wait GUI idle while "
	"programming pipes. Bad things might happen.\n");
	}

	tmp = RREG32(AVIVO_D1VGA_CONTROL);
	WREG32(AVIVO_D1VGA_CONTROL, tmp & ~AVIVO_DVGA_CONTROL_MODE_ENABLE);
	tmp = RREG32(AVIVO_D2VGA_CONTROL);
	WREG32(AVIVO_D2VGA_CONTROL, tmp & ~AVIVO_DVGA_CONTROL_MODE_ENABLE);

	tmp = RREG32(AVIVO_D1CRTC_CONTROL);
	WREG32(AVIVO_D1CRTC_CONTROL, tmp & ~AVIVO_CRTC_EN);
	tmp = RREG32(AVIVO_D2CRTC_CONTROL);
	WREG32(AVIVO_D2CRTC_CONTROL, tmp & ~AVIVO_CRTC_EN);

	/* make sure all previous write got through */
	tmp = RREG32(AVIVO_D2CRTC_CONTROL);

	mdelay(1);
	}

	int rs600_mc_init(struct radeon_device *rdev)
	{
	uint32_t tmp;
	int r;

	if (r100_debugfs_rbbm_init(rdev)) {
	DRM_ERROR("Failed to register debugfs file for RBBM !\n");
	}

	rs600_gpu_init(rdev);
	rs600_gart_disable(rdev);

	/* Setup GPU memory space */
	rdev->mc.vram_location = 0xFFFFFFFFUL;
	rdev->mc.gtt_location = 0xFFFFFFFFUL;
	r = radeon_mc_setup(rdev);
	if (r) {
	return r;
	}

	/* Program GPU memory space */
	/* Enable bus master */
	tmp = RREG32(RADEON_BUS_CNTL) & ~RS600_BUS_MASTER_DIS;
	WREG32(RADEON_BUS_CNTL, tmp);
	/* FIXME: What does AGP means for such chipset ? */
	WREG32_MC(RS600_MC_AGP_LOCATION, 0x0FFFFFFF);
	/* FIXME: are this AGP reg in indirect MC range ? */
	WREG32_MC(RS600_MC_AGP_BASE, 0);
	WREG32_MC(RS600_MC_AGP_BASE_2, 0);
	rs600_mc_disable_clients(rdev);
	if (rs600_mc_wait_for_idle(rdev)) {
	printk(KERN_WARNING "Failed to wait MC idle while "
	"programming pipes. Bad things might happen.\n");
	}
	tmp = rdev->mc.vram_location + rdev->mc.vram_size - 1;
	tmp = REG_SET(RS600_MC_FB_TOP, tmp >> 16);
	tmp \|= REG_SET(RS600_MC_FB_START, rdev->mc.vram_location >> 16);
	WREG32_MC(RS600_MC_FB_LOCATION, tmp);
	WREG32(RS690_HDP_FB_LOCATION, rdev->mc.vram_location >> 16);
	return 0;
	}

	void rs600_mc_fini(struct radeon_device *rdev)
	{
	rs600_gart_disable(rdev);
	radeon_gart_table_vram_free(rdev);
	radeon_gart_fini(rdev);
	}


	/*
	* Global GPU functions
	*/
	void rs600_disable_vga(struct radeon_device *rdev)
	{
	unsigned tmp;

	WREG32(0x330, 0);
	WREG32(0x338, 0);
	tmp = RREG32(0x300);
	tmp &= ~(3 << 16);
	WREG32(0x300, tmp);
	WREG32(0x308, (1 << 8));
	WREG32(0x310, rdev->mc.vram_location);
	WREG32(0x594, 0);
	}

	int rs600_mc_wait_for_idle(struct radeon_device *rdev)
	{
	unsigned i;
	uint32_t tmp;

	for (i = 0; i < rdev->usec_timeout; i++) {
	/* read MC_STATUS */
	tmp = RREG32_MC(RS600_MC_STATUS);
	if (tmp & RS600_MC_STATUS_IDLE) {
	return 0;
	}
	DRM_UDELAY(1);
	}
	return -1;
	}

	void rs600_errata(struct radeon_device *rdev)
	{
	rdev->pll_errata = 0;
	}

	void rs600_gpu_init(struct radeon_device *rdev)
	{
	/* FIXME: HDP same place on rs600 ? */
	r100_hdp_reset(rdev);
	rs600_disable_vga(rdev);
	/* FIXME: is this correct ? */
	r420_pipes_init(rdev);
	if (rs600_mc_wait_for_idle(rdev)) {
	printk(KERN_WARNING "Failed to wait MC idle while "
	"programming pipes. Bad things might happen.\n");
	}
	}


	/*
	* VRAM info.
	*/
	void rs600_vram_info(struct radeon_device *rdev)
	{
	/* FIXME: to do or is these values sane ? */
	rdev->mc.vram_is_ddr = true;
	rdev->mc.vram_width = 128;
	}


	/*
	* Indirect registers accessor
	*/
	uint32_t rs600_mc_rreg(struct radeon_device *rdev, uint32_t reg)
	{
	uint32_t r;

	WREG32(RS600_MC_INDEX,
	((reg & RS600_MC_ADDR_MASK) \| RS600_MC_IND_CITF_ARB0));
	r = RREG32(RS600_MC_DATA);
	return r;
	}

	void rs600_mc_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v)
	{
	WREG32(RS600_MC_INDEX,
	RS600_MC_IND_WR_EN \| RS600_MC_IND_CITF_ARB0 \|
	((reg) & RS600_MC_ADDR_MASK));
	WREG32(RS600_MC_DATA, v);
	}