diff options
Diffstat (limited to 'qemu/roms/seabios/src/malloc.c')
| -rw-r--r-- | qemu/roms/seabios/src/malloc.c | 561 |
1 files changed, 0 insertions, 561 deletions
diff --git a/qemu/roms/seabios/src/malloc.c b/qemu/roms/seabios/src/malloc.c deleted file mode 100644 index 3733855ca..000000000 --- a/qemu/roms/seabios/src/malloc.c +++ /dev/null @@ -1,561 +0,0 @@ -// Internal dynamic memory allocations. -// -// Copyright (C) 2009-2013 Kevin O'Connor <kevin@koconnor.net> -// -// This file may be distributed under the terms of the GNU LGPLv3 license. - -#include "biosvar.h" // GET_BDA -#include "config.h" // BUILD_BIOS_ADDR -#include "e820map.h" // struct e820entry -#include "list.h" // hlist_node -#include "malloc.h" // _malloc -#include "memmap.h" // PAGE_SIZE -#include "output.h" // dprintf -#include "stacks.h" // wait_preempt -#include "std/optionrom.h" // OPTION_ROM_ALIGN -#include "string.h" // memset - -// Information on a reserved area. -struct allocinfo_s { - struct hlist_node node; - u32 range_start, range_end, alloc_size; -}; - -// Information on a tracked memory allocation. -struct allocdetail_s { - struct allocinfo_s detailinfo; - struct allocinfo_s datainfo; - u32 handle; -}; - -// The various memory zones. -struct zone_s { - struct hlist_head head; -}; - -struct zone_s ZoneLow VARVERIFY32INIT, ZoneHigh VARVERIFY32INIT; -struct zone_s ZoneFSeg VARVERIFY32INIT; -struct zone_s ZoneTmpLow VARVERIFY32INIT, ZoneTmpHigh VARVERIFY32INIT; - -static struct zone_s *Zones[] VARVERIFY32INIT = { - &ZoneTmpLow, &ZoneLow, &ZoneFSeg, &ZoneTmpHigh, &ZoneHigh -}; - - -/**************************************************************** - * low-level memory reservations - ****************************************************************/ - -// Find and reserve space from a given zone -static u32 -alloc_new(struct zone_s *zone, u32 size, u32 align, struct allocinfo_s *fill) -{ - struct allocinfo_s *info; - hlist_for_each_entry(info, &zone->head, node) { - u32 alloc_end = info->range_start + info->alloc_size; - u32 range_end = info->range_end; - u32 new_range_end = ALIGN_DOWN(range_end - size, align); - if (new_range_end >= alloc_end && new_range_end <= range_end) { - // Found space - now reserve it. - fill->range_start = new_range_end; - fill->range_end = range_end; - fill->alloc_size = size; - - info->range_end = new_range_end; - hlist_add_before(&fill->node, &info->node); - return new_range_end; - } - } - return 0; -} - -// Reserve space for a 'struct allocdetail_s' and fill -static struct allocdetail_s * -alloc_new_detail(struct allocdetail_s *temp) -{ - u32 detail_addr = alloc_new(&ZoneTmpHigh, sizeof(struct allocdetail_s) - , MALLOC_MIN_ALIGN, &temp->detailinfo); - if (!detail_addr) { - detail_addr = alloc_new(&ZoneTmpLow, sizeof(struct allocdetail_s) - , MALLOC_MIN_ALIGN, &temp->detailinfo); - if (!detail_addr) { - warn_noalloc(); - return NULL; - } - } - struct allocdetail_s *detail = memremap(detail_addr, sizeof(*detail)); - - // Fill final 'detail' allocation from data in 'temp' - memcpy(detail, temp, sizeof(*detail)); - hlist_replace(&temp->detailinfo.node, &detail->detailinfo.node); - hlist_replace(&temp->datainfo.node, &detail->datainfo.node); - return detail; -} - -// Add new memory to a zone -static void -alloc_add(struct zone_s *zone, u32 start, u32 end) -{ - // Find position to add space - struct allocinfo_s *info; - struct hlist_node **pprev; - hlist_for_each_entry_pprev(info, pprev, &zone->head, node) { - if (info->range_start < start) - break; - } - - // Add space using temporary allocation info. - struct allocdetail_s tempdetail; - tempdetail.handle = MALLOC_DEFAULT_HANDLE; - tempdetail.datainfo.range_start = start; - tempdetail.datainfo.range_end = end; - tempdetail.datainfo.alloc_size = 0; - hlist_add(&tempdetail.datainfo.node, pprev); - - // Allocate final allocation info. - struct allocdetail_s *detail = alloc_new_detail(&tempdetail); - if (!detail) - hlist_del(&tempdetail.datainfo.node); -} - -// Release space allocated with alloc_new() -static void -alloc_free(struct allocinfo_s *info) -{ - struct allocinfo_s *next = container_of_or_null( - info->node.next, struct allocinfo_s, node); - if (next && next->range_end == info->range_start) - next->range_end = info->range_end; - hlist_del(&info->node); -} - -// Search all zones for an allocation obtained from alloc_new() -static struct allocinfo_s * -alloc_find(u32 data) -{ - int i; - for (i=0; i<ARRAY_SIZE(Zones); i++) { - struct allocinfo_s *info; - hlist_for_each_entry(info, &Zones[i]->head, node) { - if (info->range_start == data) - return info; - } - } - return NULL; -} - -// Find the lowest memory range added by alloc_add() -static struct allocinfo_s * -alloc_find_lowest(struct zone_s *zone) -{ - struct allocinfo_s *info, *last = NULL; - hlist_for_each_entry(info, &zone->head, node) { - last = info; - } - return last; -} - - -/**************************************************************** - * ebda movement - ****************************************************************/ - -// Move ebda -static int -relocate_ebda(u32 newebda, u32 oldebda, u8 ebda_size) -{ - u32 lowram = GET_BDA(mem_size_kb) * 1024; - if (oldebda != lowram) - // EBDA isn't at end of ram - give up. - return -1; - - // Do copy - memmove((void*)newebda, (void*)oldebda, ebda_size * 1024); - - // Update indexes - dprintf(1, "ebda moved from %x to %x\n", oldebda, newebda); - SET_BDA(mem_size_kb, newebda / 1024); - SET_BDA(ebda_seg, FLATPTR_TO_SEG(newebda)); - return 0; -} - -// Support expanding the ZoneLow dynamically. -static u32 -zonelow_expand(u32 size, u32 align, struct allocinfo_s *fill) -{ - // Make sure to not move ebda while an optionrom is running. - if (unlikely(wait_preempt())) { - u32 data = alloc_new(&ZoneLow, size, align, fill); - if (data) - return data; - } - - struct allocinfo_s *info = alloc_find_lowest(&ZoneLow); - if (!info) - return 0; - u32 oldpos = info->range_end; - u32 newpos = ALIGN_DOWN(oldpos - size, align); - u32 bottom = info->range_start + info->alloc_size; - if (newpos >= bottom && newpos <= oldpos) - // Space already present. - return alloc_new(&ZoneLow, size, align, fill); - u16 ebda_seg = get_ebda_seg(); - u32 ebda_pos = (u32)MAKE_FLATPTR(ebda_seg, 0); - u8 ebda_size = GET_EBDA(ebda_seg, size); - u32 ebda_end = ebda_pos + ebda_size * 1024; - if (ebda_end != bottom) - // Something else is after ebda - can't use any existing space. - newpos = ALIGN_DOWN(ebda_end - size, align); - u32 newbottom = ALIGN_DOWN(newpos, 1024); - u32 newebda = ALIGN_DOWN(newbottom - ebda_size * 1024, 1024); - if (newebda < BUILD_EBDA_MINIMUM) - // Not enough space. - return 0; - - // Move ebda - int ret = relocate_ebda(newebda, ebda_pos, ebda_size); - if (ret) - return 0; - - // Update zone - if (ebda_end == bottom) - info->range_start = newbottom; - else - alloc_add(&ZoneLow, newbottom, ebda_end); - - return alloc_new(&ZoneLow, size, align, fill); -} - - -/**************************************************************** - * tracked memory allocations - ****************************************************************/ - -// Allocate physical memory from the given zone and track it as a PMM allocation -u32 -malloc_palloc(struct zone_s *zone, u32 size, u32 align) -{ - ASSERT32FLAT(); - if (!size) - return 0; - - // Find and reserve space for main allocation - struct allocdetail_s tempdetail; - tempdetail.handle = MALLOC_DEFAULT_HANDLE; - u32 data = alloc_new(zone, size, align, &tempdetail.datainfo); - if (!CONFIG_MALLOC_UPPERMEMORY && !data && zone == &ZoneLow) - data = zonelow_expand(size, align, &tempdetail.datainfo); - if (!data) - return 0; - - // Find and reserve space for bookkeeping. - struct allocdetail_s *detail = alloc_new_detail(&tempdetail); - if (!detail) { - alloc_free(&tempdetail.datainfo); - return 0; - } - - dprintf(8, "phys_alloc zone=%p size=%d align=%x ret=%x (detail=%p)\n" - , zone, size, align, data, detail); - - return data; -} - -// Allocate virtual memory from the given zone -void * __malloc -_malloc(struct zone_s *zone, u32 size, u32 align) -{ - return memremap(malloc_palloc(zone, size, align), size); -} - -// Free a data block allocated with phys_alloc -int -malloc_pfree(u32 data) -{ - ASSERT32FLAT(); - struct allocinfo_s *info = alloc_find(data); - if (!info || data == virt_to_phys(info) || !info->alloc_size) - return -1; - struct allocdetail_s *detail = container_of( - info, struct allocdetail_s, datainfo); - dprintf(8, "phys_free %x (detail=%p)\n", data, detail); - alloc_free(info); - alloc_free(&detail->detailinfo); - return 0; -} - -void -free(void *data) -{ - if (!data) - return; - int ret = malloc_pfree(virt_to_phys(data)); - if (ret) - warn_internalerror(); -} - -// Find the amount of free space in a given zone. -u32 -malloc_getspace(struct zone_s *zone) -{ - // XXX - doesn't account for ZoneLow being able to grow. - // XXX - results not reliable when CONFIG_THREAD_OPTIONROMS - u32 maxspace = 0; - struct allocinfo_s *info; - hlist_for_each_entry(info, &zone->head, node) { - u32 space = info->range_end - info->range_start - info->alloc_size; - if (space > maxspace) - maxspace = space; - } - - if (zone != &ZoneTmpHigh && zone != &ZoneTmpLow) - return maxspace; - // Account for space needed for PMM tracking. - u32 reserve = ALIGN(sizeof(struct allocdetail_s), MALLOC_MIN_ALIGN); - if (maxspace <= reserve) - return 0; - return maxspace - reserve; -} - -// Set a handle associated with an allocation. -void -malloc_sethandle(u32 data, u32 handle) -{ - ASSERT32FLAT(); - struct allocinfo_s *info = alloc_find(data); - if (!info || data == virt_to_phys(info) || !info->alloc_size) - return; - struct allocdetail_s *detail = container_of( - info, struct allocdetail_s, datainfo); - detail->handle = handle; -} - -// Find the data block allocated with phys_alloc with a given handle. -u32 -malloc_findhandle(u32 handle) -{ - int i; - for (i=0; i<ARRAY_SIZE(Zones); i++) { - struct allocinfo_s *info; - hlist_for_each_entry(info, &Zones[i]->head, node) { - if (info->range_start != virt_to_phys(info)) - continue; - struct allocdetail_s *detail = container_of( - info, struct allocdetail_s, detailinfo); - if (detail->handle == handle) - return detail->datainfo.range_start; - } - } - return 0; -} - - -/**************************************************************** - * 0xc0000-0xf0000 management - ****************************************************************/ - -static u32 RomEnd = BUILD_ROM_START; -static struct allocinfo_s *RomBase; - -#define OPROM_HEADER_RESERVE 16 - -// Return the maximum memory position option roms may use. -u32 -rom_get_max(void) -{ - if (CONFIG_MALLOC_UPPERMEMORY) - return ALIGN_DOWN(RomBase->range_end - OPROM_HEADER_RESERVE - , OPTION_ROM_ALIGN); - return SYMBOL(final_readonly_start); -} - -// Return the end of the last deployed option rom. -u32 -rom_get_last(void) -{ - return RomEnd; -} - -// Request space for an optionrom in 0xc0000-0xf0000 area. -struct rom_header * -rom_reserve(u32 size) -{ - u32 newend = ALIGN(RomEnd + size, OPTION_ROM_ALIGN); - if (newend > rom_get_max()) - return NULL; - if (CONFIG_MALLOC_UPPERMEMORY) { - if (newend < SYMBOL(zonelow_base)) - newend = SYMBOL(zonelow_base); - RomBase->range_start = newend + OPROM_HEADER_RESERVE; - } - return (void*)RomEnd; -} - -// Confirm space as in use by an optionrom. -int -rom_confirm(u32 size) -{ - void *new = rom_reserve(size); - if (!new) { - warn_noalloc(); - return -1; - } - RomEnd = ALIGN(RomEnd + size, OPTION_ROM_ALIGN); - return 0; -} - - -/**************************************************************** - * Setup - ****************************************************************/ - -void -malloc_preinit(void) -{ - ASSERT32FLAT(); - dprintf(3, "malloc preinit\n"); - - // Don't declare any memory between 0xa0000 and 0x100000 - e820_remove(BUILD_LOWRAM_END, BUILD_BIOS_ADDR-BUILD_LOWRAM_END); - - // Mark known areas as reserved. - e820_add(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED); - - // Populate temp high ram - u32 highram = 0; - int i; - for (i=e820_count-1; i>=0; i--) { - struct e820entry *en = &e820_list[i]; - u64 end = en->start + en->size; - if (end < 1024*1024) - break; - if (en->type != E820_RAM || end > 0xffffffff) - continue; - u32 s = en->start, e = end; - if (!highram) { - u32 newe = ALIGN_DOWN(e - BUILD_MAX_HIGHTABLE, MALLOC_MIN_ALIGN); - if (newe <= e && newe >= s) { - highram = newe; - e = newe; - } - } - alloc_add(&ZoneTmpHigh, s, e); - } - - // Populate regions - alloc_add(&ZoneTmpLow, BUILD_STACK_ADDR, BUILD_EBDA_MINIMUM); - if (highram) { - alloc_add(&ZoneHigh, highram, highram + BUILD_MAX_HIGHTABLE); - e820_add(highram, BUILD_MAX_HIGHTABLE, E820_RESERVED); - } -} - -void -malloc_csm_preinit(u32 low_pmm, u32 low_pmm_size, u32 hi_pmm, u32 hi_pmm_size) -{ - ASSERT32FLAT(); - - if (hi_pmm_size > BUILD_MAX_HIGHTABLE) { - u32 hi_pmm_end = hi_pmm + hi_pmm_size; - alloc_add(&ZoneTmpHigh, hi_pmm, hi_pmm_end - BUILD_MAX_HIGHTABLE); - alloc_add(&ZoneHigh, hi_pmm_end - BUILD_MAX_HIGHTABLE, hi_pmm_end); - } else { - alloc_add(&ZoneTmpHigh, hi_pmm, hi_pmm + hi_pmm_size); - } - alloc_add(&ZoneTmpLow, low_pmm, low_pmm + low_pmm_size); -} - -u32 LegacyRamSize VARFSEG; - -// Calculate the maximum ramsize (less than 4gig) from e820 map. -static void -calcRamSize(void) -{ - u32 rs = 0; - int i; - for (i=e820_count-1; i>=0; i--) { - struct e820entry *en = &e820_list[i]; - u64 end = en->start + en->size; - u32 type = en->type; - if (end <= 0xffffffff && (type == E820_ACPI || type == E820_RAM)) { - rs = end; - break; - } - } - LegacyRamSize = rs >= 1024*1024 ? rs : 1024*1024; -} - -// Update pointers after code relocation. -void -malloc_init(void) -{ - ASSERT32FLAT(); - dprintf(3, "malloc init\n"); - - if (CONFIG_RELOCATE_INIT) { - // Fixup malloc pointers after relocation - int i; - for (i=0; i<ARRAY_SIZE(Zones); i++) { - struct zone_s *zone = Zones[i]; - if (zone->head.first) - zone->head.first->pprev = &zone->head.first; - } - } - - // Initialize low-memory region - memmove(VSYMBOL(final_varlow_start), VSYMBOL(varlow_start) - , SYMBOL(varlow_end) - SYMBOL(varlow_start)); - if (CONFIG_MALLOC_UPPERMEMORY) { - alloc_add(&ZoneLow, SYMBOL(zonelow_base) + OPROM_HEADER_RESERVE - , SYMBOL(final_varlow_start)); - RomBase = alloc_find_lowest(&ZoneLow); - } else { - alloc_add(&ZoneLow, ALIGN_DOWN(SYMBOL(final_varlow_start), 1024) - , SYMBOL(final_varlow_start)); - } - - // Add space available in f-segment to ZoneFSeg - memset(VSYMBOL(zonefseg_start), 0 - , SYMBOL(zonefseg_end) - SYMBOL(zonefseg_start)); - alloc_add(&ZoneFSeg, SYMBOL(zonefseg_start), SYMBOL(zonefseg_end)); - - calcRamSize(); -} - -void -malloc_prepboot(void) -{ - ASSERT32FLAT(); - dprintf(3, "malloc finalize\n"); - - u32 base = rom_get_max(); - memset((void*)RomEnd, 0, base-RomEnd); - if (CONFIG_MALLOC_UPPERMEMORY) { - // Place an optionrom signature around used low mem area. - struct rom_header *dummyrom = (void*)base; - dummyrom->signature = OPTION_ROM_SIGNATURE; - int size = (BUILD_BIOS_ADDR - base) / 512; - dummyrom->size = (size > 255) ? 255 : size; - } - - // Reserve more low-mem if needed. - u32 endlow = GET_BDA(mem_size_kb)*1024; - e820_add(endlow, BUILD_LOWRAM_END-endlow, E820_RESERVED); - - // Clear unused f-seg ram. - struct allocinfo_s *info = alloc_find_lowest(&ZoneFSeg); - u32 size = info->range_end - info->range_start; - memset(memremap(info->range_start, size), 0, size); - dprintf(1, "Space available for UMB: %x-%x, %x-%x\n" - , RomEnd, base, info->range_start, info->range_end); - - // Give back unused high ram. - info = alloc_find_lowest(&ZoneHigh); - if (info) { - u32 giveback = ALIGN_DOWN(info->range_end-info->range_start, PAGE_SIZE); - e820_add(info->range_start, giveback, E820_RAM); - dprintf(1, "Returned %d bytes of ZoneHigh\n", giveback); - } - - calcRamSize(); -} |