diff options
| -rw-r--r-- | src/cpu/amd/family_10h-family_15h/ram_calc.c | 51 | ||||
| -rw-r--r-- | src/cpu/amd/family_10h-family_15h/ram_calc.h | 1 |
2 files changed, 51 insertions, 1 deletions
diff --git a/src/cpu/amd/family_10h-family_15h/ram_calc.c b/src/cpu/amd/family_10h-family_15h/ram_calc.c index 9ac2c993f8..4fe997e0fa 100644 --- a/src/cpu/amd/family_10h-family_15h/ram_calc.c +++ b/src/cpu/amd/family_10h-family_15h/ram_calc.c @@ -18,11 +18,30 @@ #include <cpu/x86/msr.h> #include <cpu/amd/mtrr.h> +#include <arch/io.h> +#include <device/device.h> +#include <device/pci.h> + #include <cbmem.h> #include "ram_calc.h" #if !IS_ENABLED(CONFIG_LATE_CBMEM_INIT) +static inline uint8_t is_fam15h(void) +{ + uint8_t fam15h = 0; + uint32_t family; + + family = cpuid_eax(0x80000001); + family = ((family & 0xf00000) >> 16) | ((family & 0xf00) >> 8); + + if (family >= 0x6f) + /* Family 15h or later */ + fam15h = 1; + + return fam15h; +} + uint64_t get_uma_memory_size(uint64_t topmem) { uint64_t uma_size = 0; @@ -41,10 +60,40 @@ uint64_t get_uma_memory_size(uint64_t topmem) return uma_size; } +uint64_t get_cc6_memory_size() +{ + uint8_t enable_cc6; + + uint64_t cc6_size = 0; + + if (is_fam15h()) { + enable_cc6 = 0; + +#ifdef __PRE_RAM__ + if (pci_read_config32(PCI_DEV(0, 0x18, 2), 0x118) & (0x1 << 18)) + enable_cc6 = 1; +#else + device_t dct_dev = dev_find_slot(0, PCI_DEVFN(0x18, 2)); + if (pci_read_config32(dct_dev, 0x118) & (0x1 << 18)) + enable_cc6 = 1; +#endif + + if (enable_cc6) { + /* Preserve the maximum possible CC6 save region + * This needs to be kept in sync with + * amdfam10_domain_read_resources() in northbridge.c + */ + cc6_size = 0x8000000; + } + } + + return cc6_size; +} + void *cbmem_top(void) { uint32_t topmem = rdmsr(TOP_MEM).lo; - return (void *) topmem - get_uma_memory_size(topmem); + return (void *) topmem - get_uma_memory_size(topmem) - get_cc6_memory_size(); } #endif diff --git a/src/cpu/amd/family_10h-family_15h/ram_calc.h b/src/cpu/amd/family_10h-family_15h/ram_calc.h index 8cfc199bdf..0bb4cacc3e 100644 --- a/src/cpu/amd/family_10h-family_15h/ram_calc.h +++ b/src/cpu/amd/family_10h-family_15h/ram_calc.h @@ -17,5 +17,6 @@ #define _AMD_MODEL_10XXX_RAM_CALC_H_ uint64_t get_uma_memory_size(uint64_t topmem); +uint64_t get_cc6_memory_size(void); #endif |