Aaron Durbin (adurbin@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11195
-gerrit
commit 4c6c459dc39a7f5f2ac00447ba32f292d75447f8 Author: Aaron Durbin adurbin@chromium.org Date: Wed Aug 5 14:33:37 2015 -0500
skylake: clean up SMM region calculations
The TSEG is defined to be from TSEG->BGSM in the host bridge registers. Use those registers at runtime to calculate the correct TSEG size.
Lastly, use a few helper macros to make constants more readable.
BUG=chrome-os-partner:43522 BRANCH=None TEST=Built, booted, suspended, resumed on glados.
Original-Change-Id: I6db424a0057ecfc040a3cd5d99476c2fb8f5d29b Original-Signed-off-by: Aaron Durbin adurbin@chromium.org Original-Reviewed-on: https://chromium-review.googlesource.com/290832 Original-Reviewed-by: Leroy P Leahy leroy.p.leahy@intel.com Original-Reviewed-by: Duncan Laurie dlaurie@chromium.org
Change-Id: I6890fa450ce8dc10080321aa1a7580e0adc48ad5 Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/soc/intel/skylake/include/soc/smm.h | 1 - src/soc/intel/skylake/memmap.c | 31 +++++++++++++++++++------------ 2 files changed, 19 insertions(+), 13 deletions(-)
diff --git a/src/soc/intel/skylake/include/soc/smm.h b/src/soc/intel/skylake/include/soc/smm.h index d895302..fbae6ef 100644 --- a/src/soc/intel/skylake/include/soc/smm.h +++ b/src/soc/intel/skylake/include/soc/smm.h @@ -51,7 +51,6 @@ struct smm_relocation_params { int smm_save_state_in_msrs; };
-#define smm_region_size mmap_region_granluarity #if IS_ENABLED(CONFIG_HAVE_SMI_HANDLER) int smm_initialize(void); void smm_relocate(void); diff --git a/src/soc/intel/skylake/memmap.c b/src/soc/intel/skylake/memmap.c index bba93cb..81ec89d 100644 --- a/src/soc/intel/skylake/memmap.c +++ b/src/soc/intel/skylake/memmap.c @@ -25,6 +25,7 @@ #include <soc/romstage.h> #include <soc/smm.h> #include <soc/systemagent.h> +#include <stdlib.h>
size_t mmap_region_granluarity(void) { @@ -34,24 +35,30 @@ size_t mmap_region_granluarity(void) return CONFIG_SMM_TSEG_SIZE;
/* Make it 8MiB by default. */ - return 8 << 20; + return 8*MiB; }
-static void *smm_region_start(void) +/* Returns base of requested region encoded in the system agent. */ +static inline uintptr_t system_agent_region_base(size_t reg) { - /* - * SMM base address matches the top of DPR. The DPR register has - * 1 MiB alignment and reports the TOP of the DPR range. - */ - uint32_t smm_base = pci_read_config32(SA_DEV_ROOT, DPR); - smm_base = ALIGN_DOWN(smm_base, 1 << 20); - return (void *)smm_base; + /* All regions concerned for have 1 MiB alignment. */ + return ALIGN_DOWN(pci_read_config32(SA_DEV_ROOT, reg), 1*MiB); +} + +static inline uintptr_t smm_region_start(void) +{ + return system_agent_region_base(TSEG); +} + +static inline size_t smm_region_size(void) +{ + return system_agent_region_base(BGSM) - smm_region_start(); }
void smm_region(void **start, size_t *size) { - *start = smm_region_start(); - *size = mmap_region_granluarity(); + *start = (void *)smm_region_start(); + *size = smm_region_size(); }
void *cbmem_top(void) @@ -84,7 +91,7 @@ void *cbmem_top(void) * +-------------------------+ */
- unsigned long top_of_ram = (unsigned long)smm_region_start(); + uintptr_t top_of_ram = smm_region_start();
/* * Subtract DMA Protected Range size if enabled and align to a multiple
-
Aaron Durbin