From 885c289bba6554545ae21896a318f71e4ccb16a8 Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Mon, 3 Oct 2016 17:16:48 +0200 Subject: nb/intel/i945: Make pci_mmio_size a devicetree parameter Instead of hardcoding pci_mmio_size in the raminit code, this makes it a parameter in the devicetree. A safe minimum of 768M is also defined since using anything less causes problems (if 4G of ram is used). Change-Id: If004c861464162d5dbbc61836a3a205d1619dfd5 Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/16856 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber --- src/northbridge/intel/i945/chip.h | 1 + src/northbridge/intel/i945/raminit.c | 21 ++++++++++++++++++--- 2 files changed, 19 insertions(+), 3 deletions(-) (limited to 'src/northbridge') diff --git a/src/northbridge/intel/i945/chip.h b/src/northbridge/intel/i945/chip.h index 446af72e4d..8eaa5b4a40 100644 --- a/src/northbridge/intel/i945/chip.h +++ b/src/northbridge/intel/i945/chip.h @@ -8,6 +8,7 @@ struct northbridge_intel_i945_config { u32 gpu_backlight; int gpu_lvds_use_spread_spectrum_clock; struct i915_gpu_controller_info gfx; + int pci_mmio_size; }; #endif /* NORTHBRIDGE_INTEL_I945_CHIP_H */ diff --git a/src/northbridge/intel/i945/raminit.c b/src/northbridge/intel/i945/raminit.c index ca800f7bf6..a4a1eaf0ca 100644 --- a/src/northbridge/intel/i945/raminit.c +++ b/src/northbridge/intel/i945/raminit.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include #include #include #include @@ -25,6 +27,7 @@ #include #include "raminit.h" #include "i945.h" +#include "chip.h" #include /* Debugging macros. */ @@ -48,6 +51,7 @@ #define RAM_EMRS_2 (0x1 << 21) #define RAM_EMRS_3 (0x2 << 21) +#define DEFAULT_PCI_MMIO_SIZE 768 static int get_dimm_spd_address(struct sys_info *sysinfo, int device) { if (sysinfo->spd_addresses) @@ -1495,7 +1499,9 @@ static void sdram_detect_dimm_size(struct sys_info * sysinfo) static int sdram_program_row_boundaries(struct sys_info *sysinfo) { int i; - int cum0, cum1, tolud, tom; + int cum0, cum1, tolud, tom, pci_mmio_size; + const struct device *dev; + const struct northbridge_intel_i945_config *cfg = NULL; printk(BIOS_DEBUG, "Setting RAM size...\n"); @@ -1534,8 +1540,17 @@ static int sdram_program_row_boundaries(struct sys_info *sysinfo) tom = tolud >> 3; /* Limit the value of TOLUD to leave some space for PCI memory. */ - if (tolud > 0xd0) - tolud = 0xd0; /* 3.25GB : 0.75GB */ + dev = dev_find_slot(0, PCI_DEVFN(0, 0)); + if (dev) + cfg = dev->chip_info; + + /* Don't use pci mmio sizes smaller than 768M */ + if (!cfg || cfg->pci_mmio_size <= DEFAULT_PCI_MMIO_SIZE) + pci_mmio_size = DEFAULT_PCI_MMIO_SIZE; + else + pci_mmio_size = cfg->pci_mmio_size; + + tolud = MIN(((4096 - pci_mmio_size) / 128) << 3, tolud); pci_write_config8(PCI_DEV(0,0,0), TOLUD, tolud); -- cgit v1.2.3