EXPORT_SYMBOL(memory_start);
unsigned long memory_end = 0;
EXPORT_SYMBOL(memory_end);
+unsigned long memory_limit = 0;
static struct resource mem_resources[MAX_NUMNODES];
static int __init early_parse_mem(char *p)
{
- unsigned long size;
+ if (!p)
+ return 1;
- memory_start = (unsigned long)__va(__MEMORY_START);
- size = memparse(p, &p);
+ memory_limit = PAGE_ALIGN(memparse(p, &p));
- if (size > __MEMORY_SIZE) {
- printk(KERN_ERR
- "Using mem= to increase the size of kernel memory "
- "is not allowed.\n"
- " Recompile the kernel with the correct value for "
- "CONFIG_MEMORY_SIZE.\n");
- return 0;
- }
-
- memory_end = memory_start + size;
+ pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
return 0;
}
early_param("mem", early_parse_mem);
-/*
- * Register fully available low RAM pages with the bootmem allocator.
- */
-static void __init register_bootmem_low_pages(void)
-{
- unsigned long curr_pfn, last_pfn, pages;
-
- /*
- * We are rounding up the start address of usable memory:
- */
- curr_pfn = PFN_UP(__MEMORY_START);
-
- /*
- * ... and at the end of the usable range downwards:
- */
- last_pfn = PFN_DOWN(__pa(memory_end));
-
- if (last_pfn > max_low_pfn)
- last_pfn = max_low_pfn;
-
- pages = last_pfn - curr_pfn;
- free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
-}
-
-static void __init check_for_initrd(void)
+void __init check_for_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
unsigned long start, end;
unsigned long end_pfn)
{
struct resource *res = &mem_resources[nid];
+ unsigned long start, end;
WARN_ON(res->name); /* max one active range per node for now */
+ start = start_pfn << PAGE_SHIFT;
+ end = end_pfn << PAGE_SHIFT;
+
res->name = "System RAM";
- res->start = start_pfn << PAGE_SHIFT;
- res->end = (end_pfn << PAGE_SHIFT) - 1;
+ res->start = start;
+ res->end = end - 1;
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
if (request_resource(&iomem_resource, res)) {
pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
start_pfn, end_pfn);
request_resource(res, &data_resource);
request_resource(res, &bss_resource);
- add_active_range(nid, start_pfn, end_pfn);
-}
-
-void __init do_init_bootmem(void)
-{
- unsigned long bootmap_size;
- unsigned long bootmap_pages, bootmem_paddr;
- u64 total_pages = (lmb_end_of_DRAM() - __MEMORY_START) >> PAGE_SHIFT;
- int i;
-
- bootmap_pages = bootmem_bootmap_pages(total_pages);
-
- bootmem_paddr = lmb_alloc(bootmap_pages << PAGE_SHIFT, PAGE_SIZE);
-
- /*
- * Find a proper area for the bootmem bitmap. After this
- * bootstrap step all allocations (until the page allocator
- * is intact) must be done via bootmem_alloc().
- */
- bootmap_size = init_bootmem_node(NODE_DATA(0),
- bootmem_paddr >> PAGE_SHIFT,
- min_low_pfn, max_low_pfn);
-
- /* Add active regions with valid PFNs. */
- for (i = 0; i < lmb.memory.cnt; i++) {
- unsigned long start_pfn, end_pfn;
- start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
- end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i);
- __add_active_range(0, start_pfn, end_pfn);
- }
-
- /*
- * Handle additional early reservations
- */
- check_for_initrd();
- reserve_crashkernel();
-
- /*
- * Add all physical memory to the bootmem map and mark each
- * area as present.
- */
- register_bootmem_low_pages();
-
- /* Reserve the sections we're already using. */
- for (i = 0; i < lmb.reserved.cnt; i++)
- reserve_bootmem(lmb.reserved.region[i].base,
- lmb_size_bytes(&lmb.reserved, i),
- BOOTMEM_DEFAULT);
-
- node_set_online(0);
-
- sparse_memory_present_with_active_regions(0);
-}
-
-static void __init setup_memory(void)
-{
- unsigned long start_pfn;
-
- /*
- * Partially used pages are not usable - thus
- * we are rounding upwards:
- */
- start_pfn = PFN_UP(__pa(_end));
-
/*
- * Reserve the kernel text and
- * Reserve the bootmem bitmap. We do this in two steps (first step
- * was init_bootmem()), because this catches the (definitely buggy)
- * case of us accidentally initializing the bootmem allocator with
- * an invalid RAM area.
+ * Also make sure that there is a PMB mapping that covers this
+ * range before we attempt to activate it, to avoid reset by MMU.
+ * We can hit this path with NUMA or memory hot-add.
*/
- lmb_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
- (PFN_PHYS(start_pfn) + PAGE_SIZE - 1) -
- (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET));
-
- /*
- * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
- */
- if (CONFIG_ZERO_PAGE_OFFSET != 0)
- lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
-
- lmb_analyze();
- lmb_dump_all();
+ pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
+ PAGE_KERNEL);
- do_init_bootmem();
- plat_mem_setup();
-}
-
-/*
- * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
- * is_kdump_kernel() to determine if we are booting after a panic. Hence
- * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
- */
-#ifdef CONFIG_CRASH_DUMP
-/* elfcorehdr= specifies the location of elf core header
- * stored by the crashed kernel.
- */
-static int __init parse_elfcorehdr(char *arg)
-{
- if (!arg)
- return -EINVAL;
- elfcorehdr_addr = memparse(arg, &arg);
- return 0;
+ add_active_range(nid, start_pfn, end_pfn);
}
-early_param("elfcorehdr", parse_elfcorehdr);
-#endif
void __init __weak plat_early_device_setup(void)
{
}
-void __init __weak plat_mem_setup(void)
-{
-}
-
void __init setup_arch(char **cmdline_p)
{
enable_mmu();
bss_resource.start = virt_to_phys(__bss_start);
bss_resource.end = virt_to_phys(_ebss)-1;
- memory_start = (unsigned long)__va(__MEMORY_START);
- if (!memory_end)
- memory_end = memory_start + __MEMORY_SIZE;
-
#ifdef CONFIG_CMDLINE_OVERWRITE
strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
#else
parse_early_param();
- uncached_init();
-
plat_early_device_setup();
- /* Let earlyprintk output early console messages */
- early_platform_driver_probe("earlyprintk", 1, 1);
-
- lmb_init();
-
sh_mv_setup();
- sh_mv.mv_mem_init();
- /*
- * Find the highest page frame number we have available
- */
- max_pfn = PFN_DOWN(__pa(memory_end));
-
- /*
- * Determine low and high memory ranges:
- */
- max_low_pfn = max_pfn;
- min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
-
- nodes_clear(node_online_map);
+ /* Let earlyprintk output early console messages */
+ early_platform_driver_probe("earlyprintk", 1, 1);
- pmb_init();
- setup_memory();
- sparse_init();
+ paging_init();
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
- paging_init();
-
- ioremap_fixed_init();
/* Perform the machine specific initialisation */
if (likely(sh_mv.mv_setup))
git.openpandora.org / pandora-kernel.git / blobdiff