ARM: initial LMB trial
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 05dbb95..833a6c3 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -11,9 +11,9 @@
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/bootmem.h>
#include <linux/mman.h>
#include <linux/nodemask.h>
+#include <linux/memblock.h>
#include <linux/sort.h>
#include <asm/cputype.h>
@@ -489,7 +489,9 @@
static void __init *early_alloc(unsigned long sz)
{
- return alloc_bootmem_low_pages(sz);
+ void *ptr = __va(memblock_alloc(sz, sz));
+ memset(ptr, 0, sz);
+ return ptr;
}
static pte_t * __init early_pte_alloc(pmd_t *pmd, unsigned long addr, unsigned long prot)
@@ -705,10 +707,14 @@
}
early_param("vmalloc", early_vmalloc);
+phys_addr_t lowmem_end_addr;
+
static void __init sanity_check_meminfo(void)
{
int i, j, highmem = 0;
+ lowmem_end_addr = __pa(vmalloc_min - 1) + 1;
+
for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
struct membank *bank = &meminfo.bank[j];
*bank = meminfo.bank[i];
@@ -834,34 +840,22 @@
}
/*
- * Reserve the various regions
+ * Reserve the special regions of memory
*/
-void __init reserve_special_regions(void)
+void __init arm_mm_memblock_reserve(void)
{
/*
- * Register the kernel text and data with bootmem.
- * Note that this can only be in node 0.
- */
-#ifdef CONFIG_XIP_KERNEL
- reserve_bootmem(__pa(_data), _end - _data, BOOTMEM_DEFAULT);
-#else
- reserve_bootmem(__pa(_stext), _end - _stext, BOOTMEM_DEFAULT);
-#endif
-
- /*
* Reserve the page tables. These are already in use,
* and can only be in node 0.
*/
- reserve_bootmem(__pa(swapper_pg_dir),
- PTRS_PER_PGD * sizeof(pgd_t), BOOTMEM_DEFAULT);
+ memblock_reserve(__pa(swapper_pg_dir), PTRS_PER_PGD * sizeof(pgd_t));
#ifdef CONFIG_SA1111
/*
* Because of the SA1111 DMA bug, we want to preserve our
* precious DMA-able memory...
*/
- reserve_bootmem(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET,
- BOOTMEM_DEFAULT);
+ memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);
#endif
}
@@ -1004,7 +998,6 @@
sanity_check_meminfo();
prepare_page_table();
map_lowmem();
- bootmem_init(mdesc);
devicemaps_init(mdesc);
kmap_init();
@@ -1012,6 +1005,9 @@
/* allocate the zero page. */
zero_page = early_alloc(PAGE_SIZE);
+
+ bootmem_init(mdesc);
+
empty_zero_page = virt_to_page(zero_page);
__flush_dcache_page(NULL, empty_zero_page);
}