Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4850
-gerrit
commit 2b15f9f6ba5bb8ccb18bc4881486cf5ca29e51dd Author: Aaron Durbin adurbin@chromium.org Date: Tue Sep 24 12:36:14 2013 -0500
baytrail: initialize graphics before MRC
The graphics device needs to have its resource contraints initialized before running the reference code. Right now just use a 256MiB aperture, 32MiB of stolen memory data, and 2MiB GTT memory.
BUG=chrome-os-partner:22869 BRANCH=None TEST=Built and booted. Noted amount of stolen memory matches configuration as well as BAR size within the graphics device.
Change-Id: I328bf858f288363187cf705d6340947393b5ff10 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/170427 --- src/soc/intel/baytrail/baytrail/gfx.h | 48 +++++++++++++++++++++++++++ src/soc/intel/baytrail/baytrail/romstage.h | 1 + src/soc/intel/baytrail/romstage/Makefile.inc | 1 + src/soc/intel/baytrail/romstage/gfx.c | 49 ++++++++++++++++++++++++++++ src/soc/intel/baytrail/romstage/romstage.c | 2 ++ 5 files changed, 101 insertions(+)
diff --git a/src/soc/intel/baytrail/baytrail/gfx.h b/src/soc/intel/baytrail/baytrail/gfx.h new file mode 100644 index 0000000..655615d --- /dev/null +++ b/src/soc/intel/baytrail/baytrail/gfx.h @@ -0,0 +1,48 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _BAYTRAIL_GFX_H_ +#define _BAYTRAIL_GFX_H_ + +/* + * PCI config registers. + */ + +#define GGC 0x50 +# define GGC_VGA_DISABLE (1 << 1) +# define GGC_GTT_SIZE_MASK (3 << 8) +# define GGC_GTT_SIZE_0MB (0 << 8) +# define GGC_GTT_SIZE_1MB (1 << 8) +# define GGC_GTT_SIZE_2MB (2 << 8) +# define GGC_GSM_SIZE_MASK (0x1f << 3) +# define GGC_GSM_SIZE_0MB (0 << 3) +# define GGC_GSM_SIZE_32MB (1 << 3) +# define GGC_GSM_SIZE_64MB (2 << 3) +# define GGC_GSM_SIZE_128MB (4 << 3) + +#define GSM_BASE 0x5c +#define GTT_BASE 0x70 + +#define MSAC 0x62 +#define APERTURE_SIZE_MASK (3 << 1) +#define APERTURE_SIZE_128MB (0 << 1) +#define APERTURE_SIZE_256MB (1 << 1) +#define APERTURE_SIZE_512MB (3 << 1) + +#endif /* _BAYTRAIL_GFX_H_ */ diff --git a/src/soc/intel/baytrail/baytrail/romstage.h b/src/soc/intel/baytrail/baytrail/romstage.h index b0755e5..6c622e1 100644 --- a/src/soc/intel/baytrail/baytrail/romstage.h +++ b/src/soc/intel/baytrail/baytrail/romstage.h @@ -36,6 +36,7 @@ void romstage_common(const struct romstage_params *params); void * asmlinkage romstage_main(unsigned long bist); void asmlinkage romstage_after_car(void); void raminit(struct mrc_params *mp, int prev_sleep_state); +void gfx_init(void);
#if CONFIG_ENABLE_BUILTIN_COM1 void byt_config_com1_and_enable(void); diff --git a/src/soc/intel/baytrail/romstage/Makefile.inc b/src/soc/intel/baytrail/romstage/Makefile.inc index 18e4608..912298d 100644 --- a/src/soc/intel/baytrail/romstage/Makefile.inc +++ b/src/soc/intel/baytrail/romstage/Makefile.inc @@ -1,4 +1,5 @@ cpu_incs += $(src)/soc/intel/baytrail/romstage/cache_as_ram.inc romstage-y += romstage.c romstage-y += raminit.c +romstage-y += gfx.c romstage-$(CONFIG_ENABLE_BUILTIN_COM1) += com1.c diff --git a/src/soc/intel/baytrail/romstage/gfx.c b/src/soc/intel/baytrail/romstage/gfx.c new file mode 100644 index 0000000..3b47ccf --- /dev/null +++ b/src/soc/intel/baytrail/romstage/gfx.c @@ -0,0 +1,49 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/io.h> +#include <baytrail/gfx.h> +#include <baytrail/pci_devs.h> +#include <baytrail/romstage.h> + +void gfx_init(void) +{ + uint32_t ggc; + uint8_t msac; + const unsigned int gfx_dev = PCI_DEV(0, GFX_DEV, GFX_FUNC); + + /* The GFX device needs to set the aperture, gtt stolen size, and + * graphics stolen memory stolen size before running MRC. For now + * just hard code the defaults. Options can be added to the device + * tree if needed. */ + + ggc = pci_read_config32(gfx_dev, GGC); + msac = pci_read_config8(gfx_dev, MSAC); + + ggc &= ~(GGC_GTT_SIZE_MASK | GGC_GSM_SIZE_MASK); + ggc |= GGC_GTT_SIZE_2MB | GGC_GSM_SIZE_32MB; + /* Enable VGA decoding as well. */ + ggc &= ~(GGC_VGA_DISABLE); + + msac &= ~(APERTURE_SIZE_MASK); + msac |= APERTURE_SIZE_256MB; + + pci_write_config32(gfx_dev, GGC, ggc); + pci_write_config8(gfx_dev, MSAC, msac); +} diff --git a/src/soc/intel/baytrail/romstage/romstage.c b/src/soc/intel/baytrail/romstage/romstage.c index d353899..e4e6fde 100644 --- a/src/soc/intel/baytrail/romstage/romstage.c +++ b/src/soc/intel/baytrail/romstage/romstage.c @@ -89,6 +89,8 @@ void romstage_common(const struct romstage_params *params)
console_init();
+ gfx_init(); + /* Initialize RAM */ raminit(params->mrc_params, 5);