ARM: initial LMB trial

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 15 insertions, 19 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 05dbb956175b..833a6c3f70c0 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 build_mem_type_table(void)
 
 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 @@ static int __init early_vmalloc(char *arg)
 }
 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 @@ static inline void prepare_page_table(void)
 }
 
 /*
- * 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 @@ void __init paging_init(struct machine_desc *mdesc)
 	sanity_check_meminfo();
 	prepare_page_table();
 	map_lowmem();
-	bootmem_init(mdesc);
 	devicemaps_init(mdesc);
 	kmap_init();
 
@@ -1012,6 +1005,9 @@ void __init paging_init(struct machine_desc *mdesc)
 
 	/* 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);
 }