* linux/arch/sh/mm/init.c
*
* Copyright (C) 1999 Niibe Yutaka
- * Copyright (C) 2002 - 2007 Paul Mundt
+ * Copyright (C) 2002 - 2010 Paul Mundt
*
* Based on linux/arch/i386/mm/init.c:
* Copyright (C) 1995 Linus Torvalds
#include <linux/pagemap.h>
#include <linux/percpu.h>
#include <linux/io.h>
+#include <linux/lmb.h>
#include <linux/dma-mapping.h>
#include <asm/mmu_context.h>
+#include <asm/mmzone.h>
+#include <asm/kexec.h>
#include <asm/tlb.h>
#include <asm/cacheflush.h>
#include <asm/sections.h>
+#include <asm/setup.h>
#include <asm/cache.h>
#include <asm/sizes.h>
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
pgd_t swapper_pg_dir[PTRS_PER_PGD];
+void __init generic_mem_init(void)
+{
+ lmb_add(__MEMORY_START, __MEMORY_SIZE);
+}
+
+void __init __weak plat_mem_setup(void)
+{
+ /* Nothing to see here, move along. */
+}
+
#ifdef CONFIG_MMU
static pte_t *__get_pte_phys(unsigned long addr)
{
}
#endif /* CONFIG_MMU */
-/*
- * paging_init() sets up the page tables
- */
+void __init allocate_pgdat(unsigned int nid)
+{
+ unsigned long start_pfn, end_pfn;
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+ unsigned long phys;
+#endif
+
+ get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
+
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+ phys = __lmb_alloc_base(sizeof(struct pglist_data),
+ SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT);
+ /* Retry with all of system memory */
+ if (!phys)
+ phys = __lmb_alloc_base(sizeof(struct pglist_data),
+ SMP_CACHE_BYTES, lmb_end_of_DRAM());
+ if (!phys)
+ panic("Can't allocate pgdat for node %d\n", nid);
+
+ NODE_DATA(nid) = __va(phys);
+ memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
+
+ NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
+#endif
+
+ NODE_DATA(nid)->node_start_pfn = start_pfn;
+ NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
+}
+
+static void __init bootmem_init_one_node(unsigned int nid)
+{
+ unsigned long total_pages, paddr;
+ unsigned long end_pfn;
+ struct pglist_data *p;
+ int i;
+
+ p = NODE_DATA(nid);
+
+ /* Nothing to do.. */
+ if (!p->node_spanned_pages)
+ return;
+
+ end_pfn = p->node_start_pfn + p->node_spanned_pages;
+
+ total_pages = bootmem_bootmap_pages(p->node_spanned_pages);
+
+ paddr = lmb_alloc(total_pages << PAGE_SHIFT, PAGE_SIZE);
+ if (!paddr)
+ panic("Can't allocate bootmap for nid[%d]\n", nid);
+
+ init_bootmem_node(p, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn);
+
+ free_bootmem_with_active_regions(nid, end_pfn);
+
+ /*
+ * XXX Handle initial reservations for the system memory node
+ * only for the moment, we'll refactor this later for handling
+ * reservations in other nodes.
+ */
+ if (nid == 0) {
+ /* 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);
+ }
+
+ sparse_memory_present_with_active_regions(nid);
+}
+
+static void __init do_init_bootmem(void)
+{
+ int i;
+
+ /* 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);
+ }
+
+ /* All of system RAM sits in node 0 for the non-NUMA case */
+ allocate_pgdat(0);
+ node_set_online(0);
+
+ plat_mem_setup();
+
+ for_each_online_node(i)
+ bootmem_init_one_node(i);
+
+ sparse_init();
+}
+
+static void __init early_reserve_mem(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.
+ */
+ 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);
+
+ /*
+ * Handle additional early reservations
+ */
+ check_for_initrd();
+ reserve_crashkernel();
+}
+
void __init paging_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
unsigned long vaddr, end;
int nid;
+ lmb_init();
+
+ sh_mv.mv_mem_init();
+
+ early_reserve_mem();
+
+ lmb_enforce_memory_limit(memory_limit);
+ lmb_analyze();
+
+ lmb_dump_all();
+
+ /*
+ * Determine low and high memory ranges:
+ */
+ max_low_pfn = max_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT;
+ min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
+
+ nodes_clear(node_online_map);
+
+ memory_start = (unsigned long)__va(__MEMORY_START);
+ memory_end = memory_start + (memory_limit ?: lmb_phys_mem_size());
+
+ uncached_init();
+ pmb_init();
+ do_init_bootmem();
+ ioremap_fixed_init();
+
/* We don't need to map the kernel through the TLB, as
* it is permanatly mapped using P1. So clear the
* entire pgd. */
git.openpandora.org / pandora-kernel.git / blobdiff