Arthur Heymans (arthur@aheymans.xyz) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18511
-gerrit
commit 28302dabb1caffe320e39b786254bfa7b1c81178 Author: Arthur Heymans arthur@aheymans.xyz Date: Mon Feb 27 13:46:11 2017 +0100
nb/x4x/nortbridge.c: Fix resource allocation when IGD is disabled
Computes TSEG size dynamically. Changes the size of legacy hole.
Change-Id: I0e6898c06a2bc1016eeaa3f002ff6c39657018ae Signed-off-by: Arthur Heymans arthur@aheymans.xyz --- src/northbridge/intel/x4x/northbridge.c | 47 ++++++++++++++++++++------------- 1 file changed, 28 insertions(+), 19 deletions(-)
diff --git a/src/northbridge/intel/x4x/northbridge.c b/src/northbridge/intel/x4x/northbridge.c index 1c220b2..8f2068d 100644 --- a/src/northbridge/intel/x4x/northbridge.c +++ b/src/northbridge/intel/x4x/northbridge.c @@ -29,20 +29,20 @@ #include <northbridge/intel/x4x/chip.h> #include <northbridge/intel/x4x/x4x.h>
+static const int legacy_hole_base_k = 0xa0000 / 1024; +static const int legacy_hole_size_k = 128; + static void mch_domain_read_resources(device_t dev) { u8 index; u64 tom, touud; - u32 tomk, tseg_sizek, tolud, usable_tomk; + u32 tomk, tseg_sizek, tolud; u32 pcie_config_base, pcie_config_size; - u32 uma_sizek = 0; + u32 uma_sizek = 0, tseg_base;
const u32 top32memk = 4 * (GiB / KiB); index = 3;
- /* 1024KiB TSEG */ - tseg_sizek = 1024; - pci_domain_read_resources(dev);
/* Top of Upper Usable DRAM, including remap */ @@ -64,24 +64,33 @@ static void mch_domain_read_resources(device_t dev)
/* Graphics memory comes next */ const u16 ggc = pci_read_config16(dev, D0F0_GGC); - printk(BIOS_DEBUG, "IGD decoded, subtracting "); + if (!(ggc & 2)) { + printk(BIOS_DEBUG, "IGD decoded, subtracting ");
- /* Graphics memory */ - const u32 gms_sizek = decode_igd_memory_size((ggc >> 4) & 0xf); - printk(BIOS_DEBUG, "%uM UMA", gms_sizek >> 10); + /* Graphics memory */ + const u32 gms_sizek = decode_igd_memory_size((ggc >> 4) & 0xf); + printk(BIOS_DEBUG, "%uM UMA", gms_sizek >> 10); + tomk -= gms_sizek;
- /* GTT Graphics Stolen Memory Size (GGMS) */ - const u32 gsm_sizek = decode_igd_gtt_size((ggc >> 8) & 0xf); - printk(BIOS_DEBUG, " and %uM GTT\n", gsm_sizek >> 10); + /* GTT Graphics Stolen Memory Size (GGMS) */ + const u32 gsm_sizek = decode_igd_gtt_size((ggc >> 8) & 0xf); + printk(BIOS_DEBUG, " and %uM GTT\n", gsm_sizek >> 10); + tomk -= gms_sizek; + + uma_sizek = gms_sizek + gsm_sizek; + }
- uma_sizek = gms_sizek + gsm_sizek + tseg_sizek; - usable_tomk = tomk - uma_sizek; + tseg_base = pci_read_config32(dev, D0F0_TSEG); + tseg_sizek = ((tomk * 1024ULL) - tseg_base) >> 10; + uma_sizek += tseg_sizek; + tomk -= tseg_sizek;
- printk(BIOS_INFO, "Available memory below 4GB: %uM\n", usable_tomk >> 10); + printk(BIOS_INFO, "Available memory below 4GB: %uM\n", tomk >> 10);
/* Report the memory regions */ - ram_resource(dev, index++, 0, 0xa0000 >> 10); - ram_resource(dev, index++, 1*MiB >> 10, (usable_tomk - (1*MiB >> 10))); + ram_resource(dev, index++, 0, legacy_hole_base_k); + ram_resource(dev, index++, legacy_hole_base_k + legacy_hole_size_k, + (tomk - (legacy_hole_base_k + legacy_hole_size_k)));
/* * If >= 4GB installed then memory from TOLUD to 4GB @@ -95,8 +104,8 @@ static void mch_domain_read_resources(device_t dev) }
printk(BIOS_DEBUG, "Adding UMA memory area base=0x%08x " - "size=0x%08x\n", usable_tomk << 10, uma_sizek << 10); - fixed_mem_resource(dev, index++, usable_tomk, uma_sizek, + "size=0x%08x\n", tomk << 10, uma_sizek << 10); + fixed_mem_resource(dev, index++, tomk, uma_sizek, IORESOURCE_RESERVE);
/* Reserve high memory where the NB BARs are up to 4GiB */