diff options
Diffstat (limited to 'src/soc/intel/broadwell/systemagent.c')
| -rw-r--r-- | src/soc/intel/broadwell/systemagent.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/src/soc/intel/broadwell/systemagent.c b/src/soc/intel/broadwell/systemagent.c index 56a44d99e5..787a62b2ee 100644 --- a/src/soc/intel/broadwell/systemagent.c +++ b/src/soc/intel/broadwell/systemagent.c @@ -33,6 +33,7 @@ #include <vendorcode/google/chromeos/chromeos.h> #include <broadwell/cpu.h> #include <broadwell/iomap.h> +#include <broadwell/pci_devs.h> #include <broadwell/ramstage.h> #include <broadwell/systemagent.h> @@ -278,12 +279,26 @@ static void mc_add_dram_resources(device_t dev) unsigned long index; struct resource *resource; uint64_t mc_values[NUM_MAP_ENTRIES]; + unsigned long dpr_size = 0; + u32 dpr_reg; /* Read in the MAP registers and report their values. */ mc_read_map_entries(dev, &mc_values[0]); mc_report_map_entries(dev, &mc_values[0]); /* + * DMA Protected Range can be reserved below TSEG for PCODE patch + * or TXT/BootGuard related data. Rather than report a base address + * the DPR register reports the TOP of the region, which is the same + * as TSEG base. The region size is reported in MiB in bits 11:4. + */ + dpr_reg = pci_read_config32(SA_DEV_ROOT, DPR); + if (dpr_reg & DPR_EPM) { + dpr_size = (dpr_reg & DPR_SIZE_MASK) << 16; + printk(BIOS_INFO, "DPR SIZE: 0x%lx\n", dpr_size); + } + + /* * These are the host memory ranges that should be added: * - 0 -> 0xa0000: cacheable * - 0xc0000 -> TSEG : cacheable @@ -320,14 +335,15 @@ static void mc_add_dram_resources(device_t dev) size_k = (0xa0000 >> 10) - base_k; ram_resource(dev, index++, base_k, size_k); - /* 0xc0000 -> TSEG */ + /* 0xc0000 -> TSEG - DPR */ base_k = 0xc0000 >> 10; size_k = (unsigned long)(mc_values[TSEG_REG] >> 10) - base_k; + size_k -= dpr_size >> 10; ram_resource(dev, index++, base_k, size_k); - /* TSEG -> BGSM */ + /* TSEG - DPR -> BGSM */ resource = new_resource(dev, index++); - resource->base = mc_values[TSEG_REG]; + resource->base = mc_values[TSEG_REG] - dpr_size; resource->size = mc_values[BGSM_REG] - resource->base; resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_RESERVE | |