diff options
Diffstat (limited to 'src/northbridge/intel')
| -rw-r--r-- | src/northbridge/intel/haswell/northbridge.c | 40 |
1 files changed, 33 insertions, 7 deletions
diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c index e97ef55699..7059e2cbee 100644 --- a/src/northbridge/intel/haswell/northbridge.c +++ b/src/northbridge/intel/haswell/northbridge.c @@ -32,6 +32,7 @@ #include <stdlib.h> #include <string.h> #include <cpu/cpu.h> +#include <cpu/x86/smm.h> #include <boot/tables.h> #include <cbmem.h> #include "chip.h" @@ -333,29 +334,54 @@ static void mc_add_dram_resources(device_t dev) mc_report_map_entries(dev, &mc_values[0]); /* - * There are 4 host memory ranges that should be added: - * - 0 -> 0xa0000 : cacheable + * These are the host memory ranges that should be added: + * - 0 -> SMM_DEFAULT_BASE : cacheable + * - SMM_DEFAULT_BASE -> SMM_DEFAULT_BASE + SMM_DEFAULT_SIZE : + * cacheable and reserved + * - SMM_DEFAULT_BASE + SMM_DEFAULT_SIZE -> 0xa0000 : cacheable * - 0xc0000 -> TSEG : cacheable * - TESG -> TOLUD: not cacheable with standard MTRRs and reserved * - 4GiB -> TOUUD: cacheable * + * The default SMRAM space is reserved so that the range doesn't + * have to be saved during S3 Resume. Once marked reserved the OS + * cannot use the memory. This is a bit of an odd place to reserve + * the region, but the CPU devices don't have dev_ops->read_resources() + * called on them. + * * The range 0xa0000 -> 0xc0000 does not have any resources * associated with it to handle legacy VGA memory. If this range * is not omitted the mtrr code will setup the area as cacheable * causing VGA access to not work. * + * It should be noted that cacheable entry types need to be added in + * order. The reason is that the current MTRR code assumes this and + * falls over itself if it isn't. + * * The resource index starts low and should not meet or exceed - * PCI_BASE_ADDRESS_0. In this case there are only 3 entries so there - * are no conflicts in the index space. + * PCI_BASE_ADDRESS_0. */ index = 0; - /* 0 - > 0xa0000 */ + /* 0 - > SMM_DEFAULT_BASE */ base_k = 0; - size_k = 0xa0000 >> 10; + size_k = SMM_DEFAULT_BASE >> 10; + ram_resource(dev, index++, base_k, size_k); + + /* SMM_DEFAULT_BASE -> SMM_DEFAULT_BASE + SMM_DEFAULT_SIZE */ + resource = new_resource(dev, index++); + resource->base = SMM_DEFAULT_BASE; + resource->size = SMM_DEFAULT_SIZE; + resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | + IORESOURCE_CACHEABLE | IORESOURCE_STORED | + IORESOURCE_RESERVE | IORESOURCE_ASSIGNED; + + /* SMM_DEFAULT_BASE + SMM_DEFAULT_SIZE -> 0xa0000 */ + base_k = (SMM_DEFAULT_BASE + SMM_DEFAULT_SIZE) >> 10; + size_k = (0xa0000 >> 10) - base_k; ram_resource(dev, index++, base_k, size_k); - /* 0xa0000 -> TSEG */ + /* 0xc0000 -> TSEG */ base_k = 0xc0000 >> 10; size_k = (unsigned long)(mc_values[TSEG_REG] >> 10) - base_k; ram_resource(dev, index++, base_k, size_k); |