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sys/powerpc/pseries/mmu_phyp.c
| Show First 20 Lines • Show All 129 Lines • ▼ Show 20 Lines | mphyp_bootstrap(vm_offset_t kernelstart, vm_offset_t kernelend) | ||||
| char buf[8]; | char buf[8]; | ||||
| uint32_t prop[2]; | uint32_t prop[2]; | ||||
| uint32_t nptlp, shift = 0, slb_encoding = 0; | uint32_t nptlp, shift = 0, slb_encoding = 0; | ||||
| uint32_t lp_size, lp_encoding; | uint32_t lp_size, lp_encoding; | ||||
| struct lpte old; | struct lpte old; | ||||
| uint64_t vsid; | uint64_t vsid; | ||||
| phandle_t dev, node, root; | phandle_t dev, node, root; | ||||
| int idx, len, res; | int idx, len, res; | ||||
| bool has_lp; | |||||
| rm_init(&mphyp_eviction_lock, "pte eviction"); | rm_init(&mphyp_eviction_lock, "pte eviction"); | ||||
| moea64_early_bootstrap(kernelstart, kernelend); | moea64_early_bootstrap(kernelstart, kernelend); | ||||
| root = OF_peer(0); | root = OF_peer(0); | ||||
| dev = OF_child(root); | dev = OF_child(root); | ||||
| ▲ Show 20 Lines • Show All 48 Lines • ▼ Show 20 Lines | if (len > 0) { | ||||
| * We have to use a variable length array on the stack | * We have to use a variable length array on the stack | ||||
| * since we have very limited stack space. | * since we have very limited stack space. | ||||
| */ | */ | ||||
| pcell_t arr[len/sizeof(cell_t)]; | pcell_t arr[len/sizeof(cell_t)]; | ||||
| res = OF_getencprop(node, "ibm,segment-page-sizes", arr, | res = OF_getencprop(node, "ibm,segment-page-sizes", arr, | ||||
| sizeof(arr)); | sizeof(arr)); | ||||
| len /= 4; | len /= 4; | ||||
| idx = 0; | idx = 0; | ||||
| has_lp = false; | |||||
| while (len > 0) { | while (len > 0) { | ||||
| shift = arr[idx]; | shift = arr[idx]; | ||||
| slb_encoding = arr[idx + 1]; | slb_encoding = arr[idx + 1]; | ||||
| nptlp = arr[idx + 2]; | nptlp = arr[idx + 2]; | ||||
| dprintf0("Segment Page Size: " | dprintf0("Segment Page Size: " | ||||
| "%uKB, slb_enc=0x%X: {size, encoding}[%u] =", | "%uKB, slb_enc=0x%X: {size, encoding}[%u] =", | ||||
| shift > 10? 1 << (shift-10) : 0, | shift > 10? 1 << (shift-10) : 0, | ||||
| slb_encoding, nptlp); | slb_encoding, nptlp); | ||||
| idx += 3; | idx += 3; | ||||
| len -= 3; | len -= 3; | ||||
| while (len > 0 && nptlp) { | while (len > 0 && nptlp) { | ||||
| lp_size = arr[idx]; | lp_size = arr[idx]; | ||||
| lp_encoding = arr[idx+1]; | lp_encoding = arr[idx+1]; | ||||
| dprintf(" {%uKB, 0x%X}", | dprintf(" {%uKB, 0x%X}", | ||||
| lp_size > 10? 1 << (lp_size-10) : 0, | lp_size > 10? 1 << (lp_size-10) : 0, | ||||
| lp_encoding); | lp_encoding); | ||||
| if (slb_encoding == SLBV_L && lp_encoding == 0) | if (slb_encoding == SLBV_L && lp_encoding == 0) | ||||
| break; | has_lp = true; | ||||
| if (slb_encoding == SLB_PGSZ_4K_4K && | |||||
| lp_encoding == LP_4K_16M) | |||||
| moea64_has_lp_4k_16m = true; | |||||
| idx += 2; | idx += 2; | ||||
| len -= 2; | len -= 2; | ||||
| nptlp--; | nptlp--; | ||||
| } | } | ||||
| dprintf("\n"); | dprintf("\n"); | ||||
| if (nptlp && slb_encoding == SLBV_L && lp_encoding == 0) | if (has_lp && moea64_has_lp_4k_16m) | ||||
| break; | break; | ||||
| } | } | ||||
| if (len > 0) { | if (has_lp) { | ||||
| moea64_large_page_shift = shift; | moea64_large_page_shift = shift; | ||||
| moea64_large_page_size = 1ULL << lp_size; | moea64_large_page_size = 1ULL << lp_size; | ||||
| moea64_large_page_mask = moea64_large_page_size - 1; | moea64_large_page_mask = moea64_large_page_size - 1; | ||||
| hw_direct_map = 1; | hw_direct_map = 1; | ||||
| printf(MMU_PHYP_ID | printf(MMU_PHYP_ID | ||||
| "Support for hugepages of %uKB detected\n", | "Support for hugepages of %uKB detected\n", | ||||
| moea64_large_page_shift > 10? | moea64_large_page_shift > 10? | ||||
| 1 << (moea64_large_page_shift-10) : 0); | 1 << (moea64_large_page_shift-10) : 0); | ||||
| ▲ Show 20 Lines • Show All 301 Lines • Show Last 20 Lines | |||||