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efimemory.c revision 1.4.16.2 
      1 /*	$NetBSD: efimemory.c,v 1.4.16.2 2017/12/03 11:36:18 jdolecek Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2016 Kimihiro Nonaka <nonaka (at) netbsd.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include "efiboot.h"
     30 
     31 #include <bootinfo.h>
     32 
     33 static const char *memtypes[] = {
     34 	"unknown",
     35 	"available",
     36 	"reserved",
     37 	"ACPI reclaimable",
     38 	"ACPI NVS",
     39 	"unusable",
     40 	"disabled",
     41 	"Persistent",
     42 	"undefined (8)",
     43 	"undefined (9)",
     44 	"undefined (10)",
     45 	"undefined (11)",
     46 	"Persistent (Legacy)"
     47 };
     48 
     49 static const char *efimemtypes[] = {
     50 	"Reserved",
     51 	"LoaderCode",
     52 	"LoaderData",
     53 	"BootServicesCode",
     54 	"BootServicesData",
     55 	"RuntimeServicesCode",
     56 	"RuntimeServicesData",
     57 	"ConventionalMemory",
     58 	"UnusableMemory",
     59 	"ACPIReclaimMemory",
     60 	"ACPIMemoryNVS",
     61 	"MemoryMappedIO",
     62 	"MemoryMappedIOPortSpace",
     63 	"PalCode",
     64 	"PersistentMemory",
     65 };
     66 
     67 static int
     68 getmemtype(EFI_MEMORY_DESCRIPTOR *md)
     69 {
     70 
     71 	switch (md->Type) {
     72 	case EfiLoaderCode:
     73 	case EfiLoaderData:
     74 	case EfiBootServicesCode:
     75 	case EfiBootServicesData:
     76 	case EfiConventionalMemory:
     77 		return (md->Attribute & EFI_MEMORY_WB) ?
     78 		    BIM_Memory : BIM_Reserved;
     79 
     80 	case EfiACPIReclaimMemory:
     81 		return BIM_ACPI;
     82 
     83 	case EfiACPIMemoryNVS:
     84 		return BIM_NVS;
     85 
     86 	case EfiPersistentMemory:
     87 		return BIM_PMEM;
     88 
     89 	case EfiReservedMemoryType:
     90 	case EfiRuntimeServicesCode:
     91 	case EfiRuntimeServicesData:
     92 	case EfiUnusableMemory:
     93 	case EfiMemoryMappedIO:
     94 	case EfiMemoryMappedIOPortSpace:
     95 	case EfiPalCode:
     96 	case EfiMaxMemoryType:
     97 	default:
     98 		return BIM_Reserved;
     99 	}
    100 }
    101 
    102 EFI_MEMORY_DESCRIPTOR *
    103 efi_memory_get_map(UINTN *NoEntries, UINTN *MapKey, UINTN *DescriptorSize,
    104     UINT32 *DescriptorVersion, bool sorted)
    105 {
    106 	EFI_MEMORY_DESCRIPTOR *desc, *md, *next, *target, tmp;
    107 	UINTN i, j;
    108 
    109 	*NoEntries = 0;
    110 	desc = LibMemoryMap(NoEntries, MapKey, DescriptorSize,
    111 	    DescriptorVersion);
    112 	if (desc == NULL)
    113 		Panic(L"efi_memory_get_map failed");
    114 
    115 	if (!sorted)
    116 		return desc;
    117 
    118 	for (i = 0, md = desc; i < *NoEntries - 1; i++, md = next) {
    119 		target = next = NextMemoryDescriptor(md, *DescriptorSize);
    120 		for (j = i + 1; j < *NoEntries; j++) {
    121 			if (md->PhysicalStart > target->PhysicalStart) {
    122 				CopyMem(&tmp, md, sizeof(*md));
    123 				CopyMem(md, target, sizeof(*md));
    124 				CopyMem(target, &tmp, sizeof(*md));
    125 			}
    126 			target = NextMemoryDescriptor(target, *DescriptorSize);
    127 		}
    128 	}
    129 	return desc;
    130 }
    131 
    132 /*
    133  * get memory size below 1MB
    134  */
    135 int
    136 getbasemem(void)
    137 {
    138 	EFI_MEMORY_DESCRIPTOR *mdtop, *md, *next;
    139 	UINTN i, NoEntries, MapKey, DescriptorSize, MappingSize;
    140 	UINT32 DescriptorVersion;
    141 	EFI_PHYSICAL_ADDRESS basemem = 0, epa;
    142 
    143 	mdtop = efi_memory_get_map(&NoEntries, &MapKey, &DescriptorSize,
    144 	    &DescriptorVersion, true);
    145 
    146 	for (i = 0, md = mdtop; i < NoEntries; i++, md = next) {
    147 		next = NextMemoryDescriptor(md, DescriptorSize);
    148 		if (getmemtype(md) != BIM_Memory)
    149 			continue;
    150 		if (md->PhysicalStart >= 1 * 1024 * 1024)
    151 			continue;
    152 		if (basemem != md->PhysicalStart)
    153 			continue;
    154 
    155 		MappingSize = md->NumberOfPages * EFI_PAGE_SIZE;
    156 		epa = md->PhysicalStart + MappingSize;
    157 		if (epa == 0 || epa > 1 * 1024 * 1024)
    158 			epa = 1 * 1024 * 1024;
    159 		basemem = epa;
    160 	}
    161 
    162 	FreePool(mdtop);
    163 
    164 	return basemem / 1024;	/* KiB */
    165 }
    166 
    167 /*
    168  * get memory size above 1MB below 4GB
    169  */
    170 int
    171 getextmemx(void)
    172 {
    173 	EFI_MEMORY_DESCRIPTOR *mdtop, *md, *next;
    174 	UINTN i, NoEntries, MapKey, DescriptorSize, MappingSize;
    175 	UINT32 DescriptorVersion;
    176 	EFI_PHYSICAL_ADDRESS extmem16m = 0;	/* 0-16MB */
    177 	EFI_PHYSICAL_ADDRESS extmem4g = 0;	/* 16MB-4GB */
    178 	EFI_PHYSICAL_ADDRESS pa, epa;
    179 	bool first16m = true, first4g = true;
    180 	int extmem;
    181 
    182 	mdtop = efi_memory_get_map(&NoEntries, &MapKey, &DescriptorSize,
    183 	    &DescriptorVersion, true);
    184 
    185 	for (i = 0, md = mdtop; i < NoEntries; i++, md = next) {
    186 		next = NextMemoryDescriptor(md, DescriptorSize);
    187 		if (getmemtype(md) == BIM_Reserved)
    188 			continue;
    189 		if (md->PhysicalStart >= 4 * 1024 * 1024 * 1024ULL)
    190 			continue;
    191 
    192 		MappingSize = md->NumberOfPages * EFI_PAGE_SIZE;
    193 		epa = md->PhysicalStart + MappingSize;
    194 		if (epa == 0 || epa > 4 * 1024 * 1024 * 1024LL)
    195 			epa = 4 * 1024 * 1024 * 1024LL;
    196 
    197 		if (epa <= 1 * 1024 * 1024)
    198 			continue;
    199 
    200 		pa = md->PhysicalStart;
    201 		if (pa < 16 * 1024 * 1024) {
    202 			if (first16m || extmem16m == pa) {
    203 				first16m = false;
    204 				if (epa >= 16 * 1024 * 1024) {
    205 					extmem16m = 16 * 1024 * 1024;
    206 					pa = 16 * 1024 * 1024;
    207 				} else
    208 					extmem16m = epa;
    209 			}
    210 		}
    211 		if (pa >= 16 * 1024 * 1024) {
    212 			if (first4g || extmem4g == pa) {
    213 				first4g = false;
    214 				extmem4g = epa;
    215 			}
    216 		}
    217 	}
    218 
    219 	FreePool(mdtop);
    220 
    221 	if (extmem16m > 1 * 1024 * 1024)
    222 		extmem16m -= 1 * 1024 * 1024;	/* below 1MB */
    223 
    224 	extmem = extmem16m / 1024;
    225 	if (extmem == 15 * 1024)
    226 		extmem += extmem4g / 1024;
    227 	return extmem;
    228 }
    229 
    230 void
    231 efi_memory_probe(void)
    232 {
    233 	EFI_MEMORY_DESCRIPTOR *mdtop, *md, *next;
    234 	UINTN i, n, NoEntries, MapKey, DescriptorSize, MappingSize;
    235 	UINT32 DescriptorVersion;
    236 	int memtype;
    237 
    238 	mdtop = efi_memory_get_map(&NoEntries, &MapKey, &DescriptorSize,
    239 	    &DescriptorVersion, false);
    240 
    241 	Print(L" mem[");
    242 	for (i = 0, n = 0, md = mdtop; i < NoEntries; i++, md = next) {
    243 		next = NextMemoryDescriptor(md, DescriptorSize);
    244 
    245 		memtype = getmemtype(md);
    246 		if (memtype != BIM_Memory)
    247 			continue;
    248 
    249 		MappingSize = md->NumberOfPages * EFI_PAGE_SIZE;
    250 		if (MappingSize < 12 * 1024)	/* XXX Why? from OpenBSD */
    251 			continue;
    252 
    253 		if (n++ > 0)
    254 			Print(L" ");
    255 		Print(L"0x%lx-0x%lx", md->PhysicalStart,
    256 		    md->PhysicalStart + MappingSize - 1);
    257 	}
    258 	Print(L"]");
    259 
    260 	FreePool(mdtop);
    261 }
    262 
    263 void
    264 efi_memory_show_map(bool sorted)
    265 {
    266 	EFI_STATUS status;
    267 	EFI_MEMORY_DESCRIPTOR *mdtop, *md, *next;
    268 	UINTN i, NoEntries, MapKey, DescriptorSize;
    269 	UINT32 DescriptorVersion;
    270 	char memstr[32], efimemstr[32];
    271 	int memtype;
    272 	UINTN cols, rows, row = 0;
    273 
    274 	status = uefi_call_wrapper(ST->ConOut->QueryMode, 4, ST->ConOut,
    275 	    ST->ConOut->Mode->Mode, &cols, &rows);
    276 	if (EFI_ERROR(status) || rows <= 2)
    277 		rows = 0;
    278 	else
    279 		rows -= 2;
    280 
    281 	mdtop = efi_memory_get_map(&NoEntries, &MapKey, &DescriptorSize,
    282 	    &DescriptorVersion, sorted);
    283 
    284 	for (i = 0, md = mdtop; i < NoEntries; i++, md = next) {
    285 		next = NextMemoryDescriptor(md, DescriptorSize);
    286 
    287 		memtype = getmemtype(md);
    288 		if (memtype >= __arraycount(memtypes))
    289 			snprintf(memstr, sizeof(memstr), "unknown (%d)",
    290 			    memtype);
    291 		if (md->Type >= __arraycount(efimemtypes))
    292 			snprintf(efimemstr, sizeof(efimemstr), "unknown (%d)",
    293 			    md->Type);
    294 		printf("%016" PRIxMAX "/%016" PRIxMAX ": %s [%s]\n",
    295 		    (uintmax_t)md->PhysicalStart,
    296 		    (uintmax_t)md->PhysicalStart +
    297 		      md->NumberOfPages * EFI_PAGE_SIZE - 1,
    298 		    memtype >= __arraycount(memtypes) ?
    299 		      memstr : memtypes[memtype],
    300 		    md->Type >= __arraycount(efimemtypes) ?
    301 		      efimemstr : efimemtypes[md->Type]);
    302 
    303 		if (++row >= rows) {
    304 			row = 0;
    305 			Print(L"Press Any Key to continue :");
    306 			(void) awaitkey(-1, 0);
    307 			Print(L"\n");
    308 		}
    309 	}
    310 
    311 	FreePool(mdtop);
    312 }
    313 
    314 void
    315 vpbcopy(const void *va, void *pa, size_t n)
    316 {
    317 	memmove(pa, va, n);
    318 }
    319 
    320 void
    321 pvbcopy(const void *pa, void *va, size_t n)
    322 {
    323 	memmove(va, pa, n);
    324 }
    325 
    326 void
    327 pbzero(void *pa, size_t n)
    328 {
    329 	memset(pa, 0, n);
    330 }
    331 
    332 physaddr_t
    333 vtophys(void *va)
    334 {
    335 	return (physaddr_t)va;
    336 }
    337