* This file handles the architecture-dependent parts of initialization
*
* Copyright (C) 1999 Niibe Yutaka
- * Copyright (C) 2002 - 2007 Paul Mundt
+ * Copyright (C) 2002 - 2010 Paul Mundt
*/
#include <linux/screen_info.h>
#include <linux/ioport.h>
#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/clock.h>
+#include <asm/smp.h>
#include <asm/mmu_context.h>
+#include <asm/mmzone.h>
/*
* Initialize loops_per_jiffy as 10000000 (1000MIPS).
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)
+void __init check_for_initrd(void)
{
- unsigned long curr_pfn, last_pfn, pages;
+#ifdef CONFIG_BLK_DEV_INITRD
+ unsigned long start, end;
+
+ /*
+ * Check for the rare cases where boot loaders adhere to the boot
+ * ABI.
+ */
+ if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
+ goto disable;
+
+ start = INITRD_START + __MEMORY_START;
+ end = start + INITRD_SIZE;
+
+ if (unlikely(end <= start))
+ goto disable;
+ if (unlikely(start & ~PAGE_MASK)) {
+ pr_err("initrd must be page aligned\n");
+ goto disable;
+ }
+
+ if (unlikely(start < PAGE_OFFSET)) {
+ pr_err("initrd start < PAGE_OFFSET\n");
+ goto disable;
+ }
+
+ if (unlikely(end > lmb_end_of_DRAM())) {
+ pr_err("initrd extends beyond end of memory "
+ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+ end, (unsigned long)lmb_end_of_DRAM());
+ goto disable;
+ }
/*
- * We are rounding up the start address of usable memory:
+ * If we got this far inspite of the boot loader's best efforts
+ * to the contrary, assume we actually have a valid initrd and
+ * fix up the root dev.
*/
- curr_pfn = PFN_UP(__MEMORY_START);
+ ROOT_DEV = Root_RAM0;
/*
- * ... and at the end of the usable range downwards:
+ * Address sanitization
*/
- last_pfn = PFN_DOWN(__pa(memory_end));
+ initrd_start = (unsigned long)__va(__pa(start));
+ initrd_end = initrd_start + INITRD_SIZE;
- if (last_pfn > max_low_pfn)
- last_pfn = max_low_pfn;
+ lmb_reserve(__pa(initrd_start), INITRD_SIZE);
- pages = last_pfn - curr_pfn;
- free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
-}
+ return;
-#ifdef CONFIG_KEXEC
-static void __init reserve_crashkernel(void)
-{
- unsigned long long free_mem;
- unsigned long long crash_size, crash_base;
- void *vp;
- int ret;
-
- free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
-
- ret = parse_crashkernel(boot_command_line, free_mem,
- &crash_size, &crash_base);
- if (ret == 0 && crash_size) {
- if (crash_base <= 0) {
- vp = alloc_bootmem_nopanic(crash_size);
- if (!vp) {
- printk(KERN_INFO "crashkernel allocation "
- "failed\n");
- return;
- }
- crash_base = __pa(vp);
- } else if (reserve_bootmem(crash_base, crash_size,
- BOOTMEM_EXCLUSIVE) < 0) {
- printk(KERN_INFO "crashkernel reservation failed - "
- "memory is in use\n");
- return;
- }
-
- printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
- "for crashkernel (System RAM: %ldMB)\n",
- (unsigned long)(crash_size >> 20),
- (unsigned long)(crash_base >> 20),
- (unsigned long)(free_mem >> 20));
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
- insert_resource(&iomem_resource, &crashk_res);
- }
-}
-#else
-static inline void __init reserve_crashkernel(void)
-{}
+disable:
+ pr_info("initrd disabled\n");
+ initrd_start = initrd_end = 0;
#endif
+}
void __cpuinit calibrate_delay(void)
{
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 setup_bootmem_allocator(unsigned long free_pfn)
-{
- 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);
- }
-
- /*
- * 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);
-
-#ifdef CONFIG_BLK_DEV_INITRD
- ROOT_DEV = Root_RAM0;
-
- if (LOADER_TYPE && INITRD_START) {
- unsigned long initrd_start_phys = INITRD_START + __MEMORY_START;
-
- if (initrd_start_phys + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
- reserve_bootmem(initrd_start_phys, INITRD_SIZE,
- BOOTMEM_DEFAULT);
- initrd_start = (unsigned long)__va(initrd_start_phys);
- initrd_end = initrd_start + INITRD_SIZE;
- } else {
- printk("initrd extends beyond end of memory "
- "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
- initrd_start_phys + INITRD_SIZE,
- (unsigned long)PFN_PHYS(max_low_pfn));
- initrd_start = 0;
- }
- }
-#endif
-
- reserve_crashkernel();
-}
-
-#ifndef CONFIG_NEED_MULTIPLE_NODES
-static void __init setup_memory(void)
-{
- unsigned long start_pfn;
- u64 base = min_low_pfn << PAGE_SHIFT;
- u64 size = (max_low_pfn << PAGE_SHIFT) - base;
-
- /*
- * Partially used pages are not usable - thus
- * we are rounding upwards:
- */
- start_pfn = PFN_UP(__pa(_end));
-
- lmb_add(base, size);
-
- /*
- * 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.
- */
- 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.
+ * 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.
*/
- 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);
- setup_bootmem_allocator(start_pfn);
-}
-#else
-extern void __init setup_memory(void);
-#endif
-
-/*
- * 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 __attribute__ ((weak)) plat_early_device_setup(void)
+void __init __weak plat_early_device_setup(void)
{
}
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);
-
sh_mv_setup();
- /*
- * 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();
- lmb_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))
sh_mv.mv_setup(cmdline_p);
-#ifdef CONFIG_SMP
plat_smp_setup();
-#endif
}
/* processor boot mode configuration */
git.openpandora.org / pandora-kernel.git / blobdiff