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Diffstat (limited to 'src/lib/special_wakeup.c')
| -rw-r--r-- | src/lib/special_wakeup.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/lib/special_wakeup.c b/src/lib/special_wakeup.c new file mode 100644 index 0000000..59e3274 --- /dev/null +++ b/src/lib/special_wakeup.c @@ -0,0 +1,149 @@ +// $Id: special_wakeup.c,v 1.4 2014/02/03 01:30:25 daviddu Exp $ +// $Source: /afs/awd/projects/eclipz/KnowledgeBase/.cvsroot/eclipz/chips/p8/working/procedures/lib/special_wakeup.c,v $ +//----------------------------------------------------------------------------- +// *! (C) Copyright International Business Machines Corp. 2013 +// *! All Rights Reserved -- Property of IBM +// *! *** IBM Confidential *** +//----------------------------------------------------------------------------- + +/// \file special_wakeup.c +/// \brief Container for special wakeup related procedures + +#include "special_wakeup.h" + +uint32_t G_special_wakeup_count[PGP_NCORES] = {0}; + +/// Enter or clear special wakeup for a core +/// +/// \param set 1 = set, 0 = clear, all other values will cause an error. +/// +/// \param cores = mask of cores to set/clear special wakeup. +/// +/// \param[out] o_timeouts. Mask of cores that timed out before special wakeup +/// complete was observed. +/// +/// \retval 0 Success +/// +/// \retval -SPWU_INVALID_ARGUMENT One of the arguments was invalid in some way +/// +/// \retval others This API may also return non-0 codes from +/// getscom()/putscom() +/// +/// If getscom/putscom rc = 0, the state of the global special_wakeup counts +/// may no longer be valid. +/// + +int +occ_special_wakeup(int set, + ChipConfigCores cores, + int timeout_ms, + ChipConfigCores *o_timeouts) + +{ + + pmc_core_deconfiguration_reg_t pcdr; + pcbs_pmgp0_reg_t pmgp0; + pcbs_pmspcwkupocc_reg_t ppr; + ChipConfigCores core_list; + ChipConfigCores awake_list = 0; + ChipConfigCores success_list = 0; + ChipConfigCores poll_list = 0; + ChipConfigCores timeout_list = 0; + int rc, poll_count, core; + int time = 0; + int bad_clear; + + // get pmc deconfig vector + pcdr.value = in32(PMC_CORE_DECONFIGURATION_REG); + + core_list = cores; + bad_clear = 0; + if (! set) { + for (core = 0; core < PGP_NCORES; core++, core_list <<=1) { + if (core_list & (0x1 << (PGP_NCORES - 1))) { + if (G_special_wakeup_count[core] == 0) { + bad_clear = 1; + } + } + } + } + + + if (SSX_ERROR_CHECK_API) { + SSX_ERROR_IF( (set < 0) || + (set > 1) || + (bad_clear) || + (pcdr.fields.core_chiplet_deconf_vector & cores), + SPWU_INVALID_ARGUMENT); + } + + do { + ppr.value = 0; + if (set) { + // If count is currently zero, set the bit and increment count. + // Otherwise, just increment count + core_list = cores; + for (core = 0; core < PGP_NCORES; core++, core_list <<=1) { + if (core_list & (0x1 << (PGP_NCORES - 1))) { + if (! G_special_wakeup_count[core]) { + ppr.fields.occ_special_wakeup = 1; + rc = putscom(CORE_CHIPLET_ADDRESS(PCBS_PMSPCWKUPOCC_REG, core), ppr.value); + poll_list |= (0x1 << (PGP_NCORES - 1 - core)); + } + if (rc) break; // break for loop + ++G_special_wakeup_count[core]; + success_list |= (0x1 << (PGP_NCORES - 1 - core)); + } + } + if (rc) break; + + // poll special_wkup_done bit. + poll_count = 0; + while ((poll_list != awake_list) && (time < timeout_ms)) { + if (! poll_count) { + ssx_sleep(SSX_MICROSECONDS(2)); + ++poll_count; + } else { + ssx_sleep(SSX_MILLISECONDS(5)); + time += 5; + } + core_list = poll_list & (~awake_list); + for (core = 0; core < PGP_NCORES; core++, core_list <<=1) { + if (core_list & (0x1 << (PGP_NCORES - 1))) { + rc = getscom(CORE_CHIPLET_ADDRESS(PCBS_PMGP0_REG, core), &pmgp0.value); + if (rc) break; + if (pmgp0.fields.special_wkup_done) { + awake_list |= (0x1 << (PGP_NCORES - 1 - core)); + } else { + if (time >= timeout_ms) { + timeout_list |= (0x1<<(PGP_NCORES-1-core)); + } + } + } + } + } + } else { // clear special wakeup + core_list = cores; + for (core = 0; core < PGP_NCORES; core++, core_list <<=1) { + if (core_list & (0x1 << (PGP_NCORES - 1))) { + if (G_special_wakeup_count[core] == 1) { + ppr.fields.occ_special_wakeup = 0; + rc = putscom(CORE_CHIPLET_ADDRESS(PCBS_PMSPCWKUPOCC_REG, core), ppr.value); + } + if (rc) break; + --G_special_wakeup_count[core]; + success_list |= (0x1 << (PGP_NCORES - 1 - core)); + } + } + if (rc) break; + } + } while (0); + + // bad rc recovery (recovery of counts, etc?) + + *o_timeouts = timeout_list; + return rc; + +} + + |
