+ RAMBlock *new_block;
+
+ size = TARGET_PAGE_ALIGN(size);
+ new_block = qemu_malloc(sizeof(*new_block));
+
+#if defined(TARGET_S390X) && defined(CONFIG_KVM)
+ /* XXX S390 KVM requires the topmost vma of the RAM to be < 256GB */
+ new_block->host = mmap((void*)0x1000000, size, PROT_EXEC|PROT_READ|PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+#else
+ new_block->host = qemu_vmalloc(size);
+#endif
+#ifdef MADV_MERGEABLE
+ madvise(new_block->host, size, MADV_MERGEABLE);
+#endif
+ new_block->offset = last_ram_offset;
+ new_block->length = size;
+
+ new_block->next = ram_blocks;
+ ram_blocks = new_block;
+
+ phys_ram_dirty = qemu_realloc(phys_ram_dirty,
+ (last_ram_offset + size) >> TARGET_PAGE_BITS);
+ memset(phys_ram_dirty + (last_ram_offset >> TARGET_PAGE_BITS),
+ 0xff, size >> TARGET_PAGE_BITS);
+
+ last_ram_offset += size;
+
+ if (kvm_enabled())
+ kvm_setup_guest_memory(new_block->host, size);
+
+ return new_block->offset;
+}
+
+void qemu_ram_free(ram_addr_t addr)
+{
+ /* TODO: implement this. */
+}
+
+/* Return a host pointer to ram allocated with qemu_ram_alloc.
+ With the exception of the softmmu code in this file, this should
+ only be used for local memory (e.g. video ram) that the device owns,
+ and knows it isn't going to access beyond the end of the block.
+
+ It should not be used for general purpose DMA.
+ Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
+ */
+void *qemu_get_ram_ptr(ram_addr_t addr)
+{
+ RAMBlock *prev;
+ RAMBlock **prevp;
+ RAMBlock *block;
+
+ prev = NULL;
+ prevp = &ram_blocks;
+ block = ram_blocks;
+ while (block && (block->offset > addr
+ || block->offset + block->length <= addr)) {
+ if (prev)
+ prevp = &prev->next;
+ prev = block;
+ block = block->next;
+ }
+ if (!block) {
+ fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr);
projects / qemu.git / blobdiff