/*
* grub_uboot_probe_memory():
* Queries U-Boot for available memory regions.
*
* Sets up heap near the image in memory and sets up "start_of_ram".
*/
void
grub_uboot_mm_init (void)
{
struct sys_info *si = grub_uboot_get_sys_info ();
grub_mm_init_region ((void *) grub_modules_get_end (),
GRUB_KERNEL_MACHINE_HEAP_SIZE);
if (si && (si->mr_no != 0))
{
int i;
start_of_ram = GRUB_UINT_MAX;
// first, search for the start address
for (i = 0; i < si->mr_no; i++)
if ((si->mr[i].flags & MR_ATTR_MASK) == MR_ATTR_DRAM)
if (si->mr[i].start < start_of_ram)
start_of_ram = si->mr[i].start;
// then init memory regions for the others
for (i = 0; i < si->mr_no; i++)
if ((si->mr[i].flags & MR_ATTR_MASK) == MR_ATTR_DRAM)
if (si->mr[i].start != start_of_ram)
grub_mm_init_region ((void *) si->mr[i].start, si->mr[i].size);
}
}
/* Helper for grub_claim_heap. */
static int
heap_init (grub_uint64_t addr, grub_uint64_t len, grub_memory_type_t type,
void *data)
{
unsigned long *total = data;
if (type != GRUB_MEMORY_AVAILABLE)
return 0;
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_PRE1_5M_CLAIM))
{
if (addr + len <= 0x180000)
return 0;
if (addr < 0x180000)
{
len = addr + len - 0x180000;
addr = 0x180000;
}
}
len -= 1; /* Required for some firmware. */
/* Never exceed HEAP_MAX_SIZE */
if (*total + len > HEAP_MAX_SIZE)
len = HEAP_MAX_SIZE - *total;
/* Avoid claiming anything above HEAP_MAX_ADDR, if possible. */
if ((addr < HEAP_MAX_ADDR) && /* if it's too late, don't bother */
(addr + len > HEAP_MAX_ADDR) && /* if it wasn't available anyway, don't bother */
(*total + (HEAP_MAX_ADDR - addr) > HEAP_MIN_SIZE)) /* only limit ourselves when we can afford to */
len = HEAP_MAX_ADDR - addr;
/* In theory, firmware should already prevent this from happening by not
listing our own image in /memory/available. The check below is intended
as a safeguard in case that doesn't happen. However, it doesn't protect
us from corrupting our module area, which extends up to a
yet-undetermined region above _end. */
if ((addr < (grub_addr_t) _end) && ((addr + len) > (grub_addr_t) _start))
{
grub_printf ("Warning: attempt to claim over our own code!\n");
len = 0;
}
if (len)
{
grub_err_t err;
/* Claim and use it. */
err = grub_claimmap (addr, len);
if (err)
return err;
grub_mm_init_region ((void *) (grub_addr_t) addr, len);
}
*total += len;
if (*total >= HEAP_MAX_SIZE)
return 1;
return 0;
}
void
grub_machine_init (void)
{
#ifdef GRUB_MACHINE_QEMU
grub_qemu_init_cirrus ();
#endif
/* Initialize the console as early as possible. */
grub_vga_text_init ();
auto int NESTED_FUNC_ATTR heap_init (grub_uint64_t, grub_uint64_t,
grub_memory_type_t);
int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t size,
grub_memory_type_t type)
{
#if GRUB_CPU_SIZEOF_VOID_P == 4
/* Restrict ourselves to 32-bit memory space. */
if (addr > GRUB_ULONG_MAX)
return 0;
if (addr + size > GRUB_ULONG_MAX)
size = GRUB_ULONG_MAX - addr;
#endif
if (type != GRUB_MEMORY_AVAILABLE)
return 0;
/* Avoid the lower memory. */
if (addr < GRUB_MEMORY_MACHINE_LOWER_SIZE)
{
if (addr + size <= GRUB_MEMORY_MACHINE_LOWER_SIZE)
return 0;
else
{
size -= GRUB_MEMORY_MACHINE_LOWER_SIZE - addr;
addr = GRUB_MEMORY_MACHINE_LOWER_SIZE;
}
}
grub_mm_init_region ((void *) (grub_addr_t) addr, (grub_size_t) size);
return 0;
}
#if defined (GRUB_MACHINE_MULTIBOOT) || defined (GRUB_MACHINE_QEMU)
grub_machine_mmap_init ();
#endif
grub_machine_mmap_iterate (heap_init);
grub_tsc_init ();
}
void
grub_machine_init (void)
{
#ifdef GRUB_MACHINE_QEMU
grub_qemu_init_cirrus ();
#endif
/* Initialize the console as early as possible. */
grub_vga_text_init ();
auto int NESTED_FUNC_ATTR heap_init (grub_uint64_t, grub_uint64_t, grub_uint32_t);
int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t size, grub_uint32_t type)
{
#if GRUB_CPU_SIZEOF_VOID_P == 4
/* Restrict ourselves to 32-bit memory space. */
if (addr > GRUB_ULONG_MAX)
return 0;
if (addr + size > GRUB_ULONG_MAX)
size = GRUB_ULONG_MAX - addr;
#endif
if (type != GRUB_MACHINE_MEMORY_AVAILABLE)
return 0;
/* Avoid the lower memory. */
if (addr < GRUB_MEMORY_MACHINE_LOWER_SIZE)
{
if (addr + size <= GRUB_MEMORY_MACHINE_LOWER_SIZE)
return 0;
else
{
size -= GRUB_MEMORY_MACHINE_LOWER_SIZE - addr;
addr = GRUB_MEMORY_MACHINE_LOWER_SIZE;
}
}
if (addr == GRUB_MEMORY_MACHINE_UPPER_START
|| (addr >= GRUB_MEMORY_MACHINE_LOWER_SIZE
&& addr <= GRUB_MEMORY_MACHINE_UPPER_START
&& (addr + size > GRUB_MEMORY_MACHINE_UPPER_START)))
{
grub_size_t quarter = size >> 2;
grub_os_area_addr = addr;
grub_os_area_size = size - quarter;
grub_mm_init_region ((void *) (grub_os_area_addr + grub_os_area_size),
quarter);
}
else
/* Claim some available memory in the first /memory node. */
static void grub_claim_heap (void)
{
unsigned long total = 0;
auto int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t len, grub_uint32_t type);
int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t len, grub_uint32_t type)
{
if (type != 1)
return 0;
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_PRE1_5M_CLAIM))
{
if (addr + len <= 0x180000)
return 0;
if (addr < 0x180000)
{
len = addr + len - 0x180000;
addr = 0x180000;
}
}
len -= 1; /* Required for some firmware. */
/* Never exceed HEAP_MAX_SIZE */
if (total + len > HEAP_MAX_SIZE)
len = HEAP_MAX_SIZE - total;
/* Avoid claiming anything above HEAP_MAX_ADDR, if possible. */
if ((addr < HEAP_MAX_ADDR) && /* if it's too late, don't bother */
(addr + len > HEAP_MAX_ADDR) && /* if it wasn't available anyway, don't bother */
(total + (HEAP_MAX_ADDR - addr) > HEAP_MIN_SIZE)) /* only limit ourselves when we can afford to */
len = HEAP_MAX_ADDR - addr;
/* In theory, firmware should already prevent this from happening by not
listing our own image in /memory/available. The check below is intended
as a safeguard in case that doesn't happen. However, it doesn't protect
us from corrupting our module area, which extends up to a
yet-undetermined region above _end. */
if ((addr < (grub_addr_t) _end) && ((addr + len) > (grub_addr_t) _start))
{
grub_printf ("Warning: attempt to claim over our own code!\n");
len = 0;
}
if (len)
{
/* Claim and use it. */
if (grub_claimmap (addr, len) < 0)
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"failed to claim heap at 0x%llx, len 0x%llx",
addr, len);
grub_mm_init_region ((void *) (grub_addr_t) addr, len);
}
total += len;
if (total >= HEAP_MAX_SIZE)
return 1;
return 0;
}
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_CANNOT_INTERPRET))
heap_init (HEAP_MAX_ADDR - HEAP_MIN_SIZE, HEAP_MIN_SIZE, 1);
else
grub_machine_mmap_iterate (heap_init);
}
void
grub_machine_init (void)
{
int i;
int grub_lower_mem;
/* Initialize the console as early as possible. */
grub_console_init ();
grub_lower_mem = grub_get_conv_memsize () << 10;
/* Sanity check. */
if (grub_lower_mem < GRUB_MEMORY_MACHINE_RESERVED_END)
grub_fatal ("too small memory");
/* FIXME: This prevents loader/i386/linux.c from using low memory. When our
heap implements support for requesting a chunk in low memory, this should
no longer be a problem. */
#if 0
/* Add the lower memory into free memory. */
if (grub_lower_mem >= GRUB_MEMORY_MACHINE_RESERVED_END)
add_mem_region (GRUB_MEMORY_MACHINE_RESERVED_END,
grub_lower_mem - GRUB_MEMORY_MACHINE_RESERVED_END);
#endif
auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t,
grub_memory_type_t);
int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size,
grub_memory_type_t type)
{
/* Avoid the lower memory. */
if (addr < 0x100000)
{
if (size <= 0x100000 - addr)
return 0;
size -= 0x100000 - addr;
addr = 0x100000;
}
/* Ignore >4GB. */
if (addr <= 0xFFFFFFFF && type == GRUB_MEMORY_AVAILABLE)
{
grub_size_t len;
len = (grub_size_t) ((addr + size > 0xFFFFFFFF)
? 0xFFFFFFFF - addr
: size);
add_mem_region (addr, len);
}
return 0;
}
grub_machine_mmap_iterate (hook);
compact_mem_regions ();
for (i = 0; i < num_regions; i++)
grub_mm_init_region ((void *) mem_regions[i].addr, mem_regions[i].size);
grub_tsc_init ();
}
static void
grub_heap_init (void)
{
grub_mm_init_region ((void *) (grub_modules_get_end ()
+ GRUB_KERNEL_MACHINE_STACK_SIZE), 0x200000);
}
