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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-07-09 16:27:52 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-07-27 08:48:22 +0100
commit2778f62056ada442414392d7ccd41188bb631619 (patch)
treea7c15cc7ca077e5e4c2161f5062c44e408c03a08
parent4bb2e27db10abc555dfabd73661485fb75e4e97d (diff)
downloadlinux-2778f62056ada442414392d7ccd41188bb631619.tar.gz
ARM: initial LMB trial
Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/include/asm/memblock.h15
-rw-r--r--arch/arm/kernel/setup.c3
-rw-r--r--arch/arm/mm/init.c164
-rw-r--r--arch/arm/mm/mm.h2
-rw-r--r--arch/arm/mm/mmu.c34
-rw-r--r--arch/arm/mm/nommu.c19
7 files changed, 83 insertions, 155 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 410edd65f11..36c8b5e1259 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -10,6 +10,7 @@ config ARM
default y
select HAVE_AOUT
select HAVE_IDE
+ select HAVE_MEMBLOCK
select RTC_LIB
select SYS_SUPPORTS_APM_EMULATION
select GENERIC_ATOMIC64 if (!CPU_32v6K)
diff --git a/arch/arm/include/asm/memblock.h b/arch/arm/include/asm/memblock.h
new file mode 100644
index 00000000000..3a1d58096f4
--- /dev/null
+++ b/arch/arm/include/asm/memblock.h
@@ -0,0 +1,15 @@
+#ifndef _ASM_ARM_MEMBLOCK_H
+#define _ASM_ARM_MEMBLOCK_H
+
+#ifdef CONFIG_MMU
+extern phys_addr_t lowmem_end_addr;
+#define MEMBLOCK_REAL_LIMIT lowmem_end_addr
+#else
+#define MEMBLOCK_REAL_LIMIT 0
+#endif
+
+struct meminfo;
+
+extern void arm_memblock_init(struct meminfo *);
+
+#endif
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 387d2e9cb51..dfd29347775 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -25,6 +25,7 @@
#include <linux/smp.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
+#include <linux/memblock.h>
#include <asm/unified.h>
#include <asm/cpu.h>
@@ -715,6 +716,8 @@ void __init setup_arch(char **cmdline_p)
parse_early_param();
+ arm_memblock_init(&meminfo);
+
paging_init(mdesc);
request_standard_resources(&meminfo, mdesc);
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 1a227eea64b..4877e06308b 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -17,6 +17,7 @@
#include <linux/initrd.h>
#include <linux/highmem.h>
#include <linux/gfp.h>
+#include <linux/memblock.h>
#include <asm/mach-types.h>
#include <asm/sections.h>
@@ -146,95 +147,21 @@ static void __init find_limits(struct meminfo *mi,
}
}
-/*
- * FIXME: We really want to avoid allocating the bootmap bitmap
- * over the top of the initrd. Hopefully, this is located towards
- * the start of a bank, so if we allocate the bootmap bitmap at
- * the end, we won't clash.
- */
-static unsigned int __init
-find_bootmap_pfn(struct meminfo *mi, unsigned int bootmap_pages)
-{
- unsigned int start_pfn, i, bootmap_pfn;
-
- start_pfn = PAGE_ALIGN(__pa(_end)) >> PAGE_SHIFT;
- bootmap_pfn = 0;
-
- for_each_bank(i, mi) {
- struct membank *bank = &mi->bank[i];
- unsigned int start, end;
-
- start = bank_pfn_start(bank);
- end = bank_pfn_end(bank);
-
- if (end < start_pfn)
- continue;
-
- if (start < start_pfn)
- start = start_pfn;
-
- if (end <= start)
- continue;
-
- if (end - start >= bootmap_pages) {
- bootmap_pfn = start;
- break;
- }
- }
-
- if (bootmap_pfn == 0)
- BUG();
-
- return bootmap_pfn;
-}
-
-static int __init check_initrd(struct meminfo *mi)
-{
- int initrd = -2;
-#ifdef CONFIG_BLK_DEV_INITRD
- unsigned long end = phys_initrd_start + phys_initrd_size;
-
- /*
- * Make sure that the initrd is within a valid area of
- * memory.
- */
- if (phys_initrd_size) {
- unsigned int i;
-
- initrd = -1;
-
- for (i = 0; i < mi->nr_banks; i++) {
- struct membank *bank = &mi->bank[i];
- if (bank_phys_start(bank) <= phys_initrd_start &&
- end <= bank_phys_end(bank))
- initrd = 0;
- }
- }
-
- if (initrd == -1) {
- printk(KERN_ERR "INITRD: 0x%08lx+0x%08lx extends beyond "
- "physical memory - disabling initrd\n",
- phys_initrd_start, phys_initrd_size);
- phys_initrd_start = phys_initrd_size = 0;
- }
-#endif
-
- return initrd;
-}
-
static void __init arm_bootmem_init(struct meminfo *mi,
unsigned long start_pfn, unsigned long end_pfn)
{
- unsigned long boot_pfn;
unsigned int boot_pages;
+ phys_addr_t bitmap;
pg_data_t *pgdat;
int i;
/*
- * Allocate the bootmem bitmap page.
+ * Allocate the bootmem bitmap page. This must be in a region
+ * of memory which has already been mapped.
*/
boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
- boot_pfn = find_bootmap_pfn(mi, boot_pages);
+ bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES,
+ __pfn_to_phys(end_pfn));
/*
* Initialise the bootmem allocator, handing the
@@ -242,7 +169,7 @@ static void __init arm_bootmem_init(struct meminfo *mi,
*/
node_set_online(0);
pgdat = NODE_DATA(0);
- init_bootmem_node(pgdat, boot_pfn, start_pfn, end_pfn);
+ init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn);
for_each_bank(i, mi) {
struct membank *bank = &mi->bank[i];
@@ -251,30 +178,16 @@ static void __init arm_bootmem_init(struct meminfo *mi,
}
/*
- * Reserve the bootmem bitmap.
+ * Reserve the memblock reserved regions in bootmem.
*/
- reserve_bootmem(boot_pfn << PAGE_SHIFT,
- boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
-}
-
-static void __init bootmem_reserve_initrd(void)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
- int res;
-
- res = reserve_bootmem(phys_initrd_start,
- phys_initrd_size, BOOTMEM_EXCLUSIVE);
-
- if (res == 0) {
- initrd_start = __phys_to_virt(phys_initrd_start);
- initrd_end = initrd_start + phys_initrd_size;
- } else {
- printk(KERN_ERR
- "INITRD: 0x%08lx+0x%08lx overlaps in-use "
- "memory region - disabling initrd\n",
- phys_initrd_start, phys_initrd_size);
+ for (i = 0; i < memblock.reserved.cnt; i++) {
+ phys_addr_t start = memblock_start_pfn(&memblock.reserved, i);
+ if (start >= start_pfn &&
+ memblock_end_pfn(&memblock.reserved, i) <= end_pfn)
+ reserve_bootmem_node(pgdat, __pfn_to_phys(start),
+ memblock_size_bytes(&memblock.reserved, i),
+ BOOTMEM_DEFAULT);
}
-#endif
}
static void __init arm_bootmem_free(struct meminfo *mi)
@@ -358,16 +271,40 @@ static void arm_memory_present(struct meminfo *mi)
}
#endif
+void __init arm_memblock_init(struct meminfo *mi)
+{
+ int i;
+
+ memblock_init();
+ for (i = 0; i < mi->nr_banks; i++)
+ memblock_add(mi->bank[i].start, mi->bank[i].size);
+
+ /* Register the kernel text, kernel data and initrd with memblock. */
+#ifdef CONFIG_XIP_KERNEL
+ memblock_reserve(__pa(_data), _end - _data);
+#else
+ memblock_reserve(__pa(_stext), _end - _stext);
+#endif
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (phys_initrd_size) {
+ memblock_reserve(phys_initrd_start, phys_initrd_size);
+
+ /* Now convert initrd to virtual addresses */
+ initrd_start = __phys_to_virt(phys_initrd_start);
+ initrd_end = initrd_start + phys_initrd_size;
+ }
+#endif
+
+ arm_mm_memblock_reserve();
+
+ memblock_analyze();
+ memblock_dump_all();
+}
+
void __init bootmem_init(struct machine_desc *mdesc)
{
struct meminfo *mi = &meminfo;
unsigned long min, max_low, max_high;
- int initrd;
-
- /*
- * Locate the ramdisk image, if any.
- */
- initrd = check_initrd(mi);
max_low = max_high = 0;
@@ -375,21 +312,10 @@ void __init bootmem_init(struct machine_desc *mdesc)
arm_bootmem_init(mi, min, max_low);
- /*
- * Reserve any special regions.
- */
- reserve_special_regions();
-
if (mdesc->reserve)
mdesc->reserve();
/*
- * If the initrd is present, reserve its memory.
- */
- if (initrd == 0)
- bootmem_reserve_initrd();
-
- /*
* Sparsemem tries to allocate bootmem in memory_present(),
* so must be done after the fixed reservations
*/
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h
index afafe4fc543..fcfffae69b4 100644
--- a/arch/arm/mm/mm.h
+++ b/arch/arm/mm/mm.h
@@ -30,4 +30,4 @@ extern void __flush_dcache_page(struct address_space *mapping, struct page *page
struct machine_desc;
void __init bootmem_init(struct machine_desc *);
-void reserve_special_regions(void);
+void arm_mm_memblock_reserve(void);
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 05dbb956175..833a6c3f70c 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);
}
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index ed58ddbbc5b..40e38fcccc7 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -6,8 +6,8 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
-#include <linux/bootmem.h>
#include <linux/io.h>
+#include <linux/memblock.h>
#include <asm/cacheflush.h>
#include <asm/sections.h>
@@ -17,27 +17,14 @@
#include "mm.h"
-/*
- * Reserve the various regions
- */
-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
-
- /*
* Register the exception vector page.
* some architectures which the DRAM is the exception vector to trap,
* alloc_page breaks with error, although it is not NULL, but "0."
*/
- reserve_bootmem(CONFIG_VECTORS_BASE, PAGE_SIZE, BOOTMEM_DEFAULT);
+ memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
}
/*