diff options
Diffstat (limited to 'src/kernel/misc.C')
-rw-r--r-- | src/kernel/misc.C | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/kernel/misc.C b/src/kernel/misc.C index e280a1527..6d7e866f6 100644 --- a/src/kernel/misc.C +++ b/src/kernel/misc.C @@ -314,6 +314,51 @@ namespace KernelMisc kassert(false); } + int expand_half_cache() + { + static bool executed = false; + + if (executed) // Why are we being called a second time? + { + return -EFAULT; + } + + uint64_t startAddr = 512*KILOBYTE; + uint64_t endAddr = 1*MEGABYTE; + + size_t cache_columns = 0; + + switch(CpuID::getCpuType()) + { + case CORE_POWER8_MURANO: + case CORE_POWER8_VENICE: + cache_columns = 4; + break; + + default: + kassert(false); + break; + } + + for (size_t i = 0; i < cache_columns; i++) + { + size_t offset = i * MEGABYTE; + populate_cache_lines( + reinterpret_cast<uint64_t*>(startAddr + offset), + reinterpret_cast<uint64_t*>(endAddr + offset)); + + PageManager::addMemory(startAddr + offset, + (512*KILOBYTE)/PAGESIZE); + } + + executed = true; + + KernelMemState::setMemScratchReg(KernelMemState::MEM_CONTAINED_L3, + KernelMemState::HALF_CACHE); + + return 0; + } + int expand_full_cache() { static bool executed = false; @@ -334,8 +379,10 @@ namespace KernelMisc ( VmmManager::INITIAL_MEM_SIZE ) ; endAddr = reinterpret_cast<uint64_t*>(8 * MEGABYTE); + break; default: + kassert(false); break; } |