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ram allocation functions

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2404 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2007-02-08 23:08:38 +00:00
parent 1193610e5d
commit e9a1ab19d1
2 changed files with 21 additions and 0 deletions
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2
cpu-all.h
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@ -848,6 +848,8 @@ void cpu_register_physical_memory(target_phys_addr_t start_addr,
unsigned long size,
unsigned long phys_offset);
uint32_t cpu_get_physical_page_desc(target_phys_addr_t addr);
ram_addr_t qemu_ram_alloc(unsigned int size);
void qemu_ram_free(ram_addr_t addr);
int cpu_register_io_memory(int io_index,
CPUReadMemoryFunc **mem_read,
CPUWriteMemoryFunc **mem_write,

19
exec.c
View File

@ -82,6 +82,7 @@ int phys_ram_size;
int phys_ram_fd;
uint8_t *phys_ram_base;
uint8_t *phys_ram_dirty;
static ram_addr_t phys_ram_alloc_offset = 0;
CPUState *first_cpu;
/* current CPU in the current thread. It is only valid inside
@ -1812,6 +1813,24 @@ uint32_t cpu_get_physical_page_desc(target_phys_addr_t addr)
return p->phys_offset;
}
/* XXX: better than nothing */
ram_addr_t qemu_ram_alloc(unsigned int size)
{
ram_addr_t addr;
if ((phys_ram_alloc_offset + size) >= phys_ram_size) {
fprintf(stderr, "Not enough memory (requested_size = %u, max memory = %d)\n",
size, phys_ram_size);
abort();
}
addr = phys_ram_alloc_offset;
phys_ram_alloc_offset = TARGET_PAGE_ALIGN(phys_ram_alloc_offset + size);
return addr;
}
void qemu_ram_free(ram_addr_t addr)
{
}
static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr)
{
#ifdef DEBUG_UNASSIGNED