lk/linux-kernel-test
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Merge branch 'sh/lmb'

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Conflicts:
	arch/sh/kernel/setup.c
This commit is contained in:
Paul Mundt
2010-05-13 17:48:05 +09:00
parent c5eb5b372e 21823259a7
commit ef4ed97d6b
11 changed files with 273 additions and 211 deletions
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232
arch/sh/kernel/setup.c
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@ -4,7 +4,7 @@
* 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>
@ -41,6 +41,7 @@
#include <asm/clock.h>
#include <asm/smp.h>
#include <asm/mmu_context.h>
#include <asm/mmzone.h>
/*
* Initialize loops_per_jiffy as 10000000 (1000MIPS).
@ -94,6 +95,7 @@ unsigned long memory_start;
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];
@ -101,94 +103,18 @@ int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
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)
{
unsigned long curr_pfn, last_pfn, pages;
/*
* We are rounding up the start address of usable memory:
*/
curr_pfn = PFN_UP(__MEMORY_START);
/*
* ... and at the end of the usable range downwards:
*/
last_pfn = PFN_DOWN(__pa(memory_end));
if (last_pfn > max_low_pfn)
last_pfn = max_low_pfn;
pages = last_pfn - curr_pfn;
free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
}
#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)
{}
#endif
static void __init check_for_initrd(void)
void __init check_for_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
unsigned long start, end;
@ -235,7 +161,7 @@ static void __init check_for_initrd(void)
initrd_start = (unsigned long)__va(__pa(start));
initrd_end = initrd_start + INITRD_SIZE;
reserve_bootmem(__pa(initrd_start), INITRD_SIZE, BOOTMEM_DEFAULT);
lmb_reserve(__pa(initrd_start), INITRD_SIZE);
return;
@ -265,13 +191,18 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
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);
@ -287,100 +218,18 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
request_resource(res, &data_resource);
request_resource(res, &bss_resource);
/*
* 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.
*/
pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
PAGE_KERNEL);
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);
check_for_initrd();
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.
*/
if (CONFIG_ZERO_PAGE_OFFSET != 0)
lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
lmb_analyze();
lmb_dump_all();
setup_bootmem_allocator(start_pfn);
}
#else
extern void __init setup_memory(void);
#endif
void __init __attribute__ ((weak)) plat_early_device_setup(void)
void __init __weak plat_early_device_setup(void)
{
}
@ -421,10 +270,6 @@ void __init setup_arch(char **cmdline_p)
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
@ -441,39 +286,18 @@ void __init setup_arch(char **cmdline_p)
parse_early_param();
uncached_init();
plat_early_device_setup();
sh_mv_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);
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))