Patch set updated for coreboot: nb/intel/i945: make pci_mmio_size a devicetree parameter
Arthur Heymans (arthur@aheymans.xyz) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16856
-gerrit
commit 8932c0521805dedae4b3cb4f5bfe101428d8b3d6 Author: Arthur Heymans arthur@aheymans.xyz Date: Mon Oct 3 17:16:48 2016 +0200
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 arthur@aheymans.xyz --- src/mainboard/apple/macbook21/devicetree.cb | 2 ++ src/mainboard/gigabyte/ga-945gcm-s2l/devicetree.cb | 2 ++ src/mainboard/lenovo/t60/devicetree.cb | 2 ++ src/mainboard/lenovo/x60/devicetree.cb | 2 ++ src/northbridge/intel/i945/chip.h | 1 + src/northbridge/intel/i945/raminit.c | 21 ++++++++++++++++++--- 6 files changed, 27 insertions(+), 3 deletions(-)
diff --git a/src/mainboard/apple/macbook21/devicetree.cb b/src/mainboard/apple/macbook21/devicetree.cb index 4bbe28d..f37e768 100644 --- a/src/mainboard/apple/macbook21/devicetree.cb +++ b/src/mainboard/apple/macbook21/devicetree.cb @@ -30,6 +30,8 @@ chip northbridge/intel/i945 end end
+ register "pci_mmio_size" = "768" + device domain 0 on device pci 00.0 on # Host bridge subsystemid 0x8086 0x7270 diff --git a/src/mainboard/gigabyte/ga-945gcm-s2l/devicetree.cb b/src/mainboard/gigabyte/ga-945gcm-s2l/devicetree.cb index 655065a..acf743b 100644 --- a/src/mainboard/gigabyte/ga-945gcm-s2l/devicetree.cb +++ b/src/mainboard/gigabyte/ga-945gcm-s2l/devicetree.cb @@ -25,6 +25,8 @@ chip northbridge/intel/i945 end end
+ register "pci_mmio_size" = "768" + device domain 0 on device pci 00.0 on # host bridge subsystemid 0x1458 0x5000 diff --git a/src/mainboard/lenovo/t60/devicetree.cb b/src/mainboard/lenovo/t60/devicetree.cb index 2dc9f45..f66455b 100644 --- a/src/mainboard/lenovo/t60/devicetree.cb +++ b/src/mainboard/lenovo/t60/devicetree.cb @@ -30,6 +30,8 @@ chip northbridge/intel/i945 end end
+ register "pci_mmio_size" = "768" + device domain 0 on device pci 00.0 on # Host bridge subsystemid 0x17aa 0x2015 diff --git a/src/mainboard/lenovo/x60/devicetree.cb b/src/mainboard/lenovo/x60/devicetree.cb index e2a24c1..0ac9273 100644 --- a/src/mainboard/lenovo/x60/devicetree.cb +++ b/src/mainboard/lenovo/x60/devicetree.cb @@ -30,6 +30,8 @@ chip northbridge/intel/i945 end end
+ register "pci_mmio_size" = "768" + device domain 0 on device pci 00.0 on # Host bridge subsystemid 0x17aa 0x2017 diff --git a/src/northbridge/intel/i945/chip.h b/src/northbridge/intel/i945/chip.h index 446af72..c6d80e6 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; + u16 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 ca800f7..7e9c633 100644 --- a/src/northbridge/intel/i945/raminit.c +++ b/src/northbridge/intel/i945/raminit.c @@ -16,6 +16,8 @@ #include <console/console.h> #include <cpu/x86/mtrr.h> #include <cpu/x86/cache.h> +#include <device/pci_def.h> +#include <device/device.h> #include <lib.h> #include <pc80/mc146818rtc.h> #include <spd.h> @@ -25,6 +27,7 @@ #include <lib.h> #include "raminit.h" #include "i945.h" +#include "chip.h" #include <cbmem.h>
/* 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((ALIGN_DOWN(4096 - pci_mmio_size, 128) / 128) << 3, tolud);
pci_write_config8(PCI_DEV(0,0,0), TOLUD, tolud);
-
Arthur Heymans