diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2013-02-15 21:45:06 -0600 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-03-21 22:59:03 +0100 |
| commit | 8ce667e50684bea7c60db43c0ca7dd1b3ec3fde3 (patch) | |
| tree | 5f68514d230ee7ebd0c60c9c667403ab06adf17b /src/cpu | |
| parent | 67481ddc2e53cd3420fa8c723edb4fe47dccc196 (diff) | |
haswell: add multipurpose SMM memory region
The SMM region is available for multipurpose use before the SMM
handler is relocated. Provide a configurable sized region in the
TSEG for use before the SMM handler is relocated. This feature is
implemented by making the reserved size a Kconfig option. Also
make the IED region a Kconfig option as well. Lastly add some sanity
checking on the Kconfig options.
Change-Id: Idd7fccf925a8787146906ac766b7878845c75935
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2804
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/intel/haswell/Kconfig | 8 | ||||
| -rw-r--r-- | src/cpu/intel/haswell/haswell.h | 20 | ||||
| -rw-r--r-- | src/cpu/intel/haswell/smmrelocate.c | 3 |
3 files changed, 31 insertions, 0 deletions
diff --git a/src/cpu/intel/haswell/Kconfig b/src/cpu/intel/haswell/Kconfig index 95d0b18ff2..b49795dd91 100644 --- a/src/cpu/intel/haswell/Kconfig +++ b/src/cpu/intel/haswell/Kconfig @@ -29,6 +29,14 @@ config SMM_TSEG_SIZE hex default 0x800000 +config IED_REGION_SIZE + hex + default 0x400000 + +config SMM_RESERVED_SIZE + hex + default 0x100000 + config MICROCODE_INCLUDE_PATH string default "src/cpu/intel/haswell" diff --git a/src/cpu/intel/haswell/haswell.h b/src/cpu/intel/haswell/haswell.h index a510e7de58..3a5ebe65ae 100644 --- a/src/cpu/intel/haswell/haswell.h +++ b/src/cpu/intel/haswell/haswell.h @@ -100,6 +100,26 @@ #define PSS_LATENCY_TRANSITION 10 #define PSS_LATENCY_BUSMASTER 10 +/* Region of SMM space is reserved for multipurpose use. It falls below + * the IED region and above the SMM handler. */ +#define RESERVED_SMM_SIZE CONFIG_SMM_RESERVED_SIZE +#define RESERVED_SMM_OFFSET \ + (CONFIG_SMM_TSEG_SIZE - CONFIG_IED_REGION_SIZE - RESERVED_SMM_SIZE) + +/* Sanity check config options. */ +#if (CONFIG_SMM_TSEG_SIZE <= (CONFIG_IED_REGION_SIZE + RESERVED_SMM_SIZE)) +# error "CONFIG_SMM_TSEG_SIZE <= (CONFIG_IED_REGION_SIZE + RESERVED_SMM_SIZE)" +#endif +#if (CONFIG_SMM_TSEG_SIZE < 0x800000) +# error "CONFIG_SMM_TSEG_SIZE must at least be 8MiB" +#endif +#if ((CONFIG_SMM_TSEG_SIZE & (CONFIG_SMM_TSEG_SIZE - 1)) != 0) +# error "CONFIG_SMM_TSEG_SIZE is not a power of 2" +#endif +#if ((CONFIG_IED_REGION_SIZE & (CONFIG_IED_REGION_SIZE - 1)) != 0) +# error "CONFIG_IED_REGION_SIZE is not a power of 2" +#endif + #ifndef __ROMCC__ #if defined(__PRE_RAM__) diff --git a/src/cpu/intel/haswell/smmrelocate.c b/src/cpu/intel/haswell/smmrelocate.c index 2a322a7f9a..65ac36388f 100644 --- a/src/cpu/intel/haswell/smmrelocate.c +++ b/src/cpu/intel/haswell/smmrelocate.c @@ -258,6 +258,9 @@ static void fill_in_relocation_params(device_t dev, params->ied_base = tsegmb + params->smram_size; params->ied_size = tseg_size - params->smram_size; + /* Adjust available SMM handler memory size. */ + params->smram_size -= RESERVED_SMM_SIZE; + /* SMRR has 32-bits of valid address aligned to 4KiB. */ params->smrr_base.lo = (params->smram_base & rmask) | MTRR_TYPE_WRBACK; params->smrr_base.hi = 0; |