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Merge branch 'highmem' into devel

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Conflicts:

	arch/arm/mach-clps7500/include/mach/memory.h
This commit is contained in:
Russell King
2008-11-28 15:39:02 +00:00
committed by Russell King
parent f412b09f4e b5ee900258
commit 7ef4de17cc
68 changed files with 772 additions and 1255 deletions
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116
arch/arm/mm/mmu.c
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@@ -646,61 +646,79 @@ static void __init early_vmalloc(char **arg)
"vmalloc area too small, limiting to %luMB\n",
vmalloc_reserve >> 20);
}
if (vmalloc_reserve > VMALLOC_END - (PAGE_OFFSET + SZ_32M)) {
vmalloc_reserve = VMALLOC_END - (PAGE_OFFSET + SZ_32M);
printk(KERN_WARNING
"vmalloc area is too big, limiting to %luMB\n",
vmalloc_reserve >> 20);
}
}
__early_param("vmalloc=", early_vmalloc);
#define VMALLOC_MIN (void *)(VMALLOC_END - vmalloc_reserve)
static int __init check_membank_valid(struct membank *mb)
{
/*
* Check whether this memory region has non-zero size or
* invalid node number.
*/
if (mb->size == 0 || mb->node >= MAX_NUMNODES)
return 0;
/*
* Check whether this memory region would entirely overlap
* the vmalloc area.
*/
if (phys_to_virt(mb->start) >= VMALLOC_MIN) {
printk(KERN_NOTICE "Ignoring RAM at %.8lx-%.8lx "
"(vmalloc region overlap).\n",
mb->start, mb->start + mb->size - 1);
return 0;
}
/*
* Check whether this memory region would partially overlap
* the vmalloc area.
*/
if (phys_to_virt(mb->start + mb->size) < phys_to_virt(mb->start) ||
phys_to_virt(mb->start + mb->size) > VMALLOC_MIN) {
unsigned long newsize = VMALLOC_MIN - phys_to_virt(mb->start);
printk(KERN_NOTICE "Truncating RAM at %.8lx-%.8lx "
"to -%.8lx (vmalloc region overlap).\n",
mb->start, mb->start + mb->size - 1,
mb->start + newsize - 1);
mb->size = newsize;
}
return 1;
}
static void __init sanity_check_meminfo(struct meminfo *mi)
static void __init sanity_check_meminfo(void)
{
int i, j;
for (i = 0, j = 0; i < mi->nr_banks; i++) {
if (check_membank_valid(&mi->bank[i]))
mi->bank[j++] = mi->bank[i];
for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
struct membank *bank = &meminfo.bank[j];
*bank = meminfo.bank[i];
#ifdef CONFIG_HIGHMEM
/*
* Split those memory banks which are partially overlapping
* the vmalloc area greatly simplifying things later.
*/
if (__va(bank->start) < VMALLOC_MIN &&
bank->size > VMALLOC_MIN - __va(bank->start)) {
if (meminfo.nr_banks >= NR_BANKS) {
printk(KERN_CRIT "NR_BANKS too low, "
"ignoring high memory\n");
} else {
memmove(bank + 1, bank,
(meminfo.nr_banks - i) * sizeof(*bank));
meminfo.nr_banks++;
i++;
bank[1].size -= VMALLOC_MIN - __va(bank->start);
bank[1].start = __pa(VMALLOC_MIN - 1) + 1;
j++;
}
bank->size = VMALLOC_MIN - __va(bank->start);
}
#else
/*
* Check whether this memory bank would entirely overlap
* the vmalloc area.
*/
if (__va(bank->start) >= VMALLOC_MIN) {
printk(KERN_NOTICE "Ignoring RAM at %.8lx-%.8lx "
"(vmalloc region overlap).\n",
bank->start, bank->start + bank->size - 1);
continue;
}
/*
* Check whether this memory bank would partially overlap
* the vmalloc area.
*/
if (__va(bank->start + bank->size) > VMALLOC_MIN ||
__va(bank->start + bank->size) < __va(bank->start)) {
unsigned long newsize = VMALLOC_MIN - __va(bank->start);
printk(KERN_NOTICE "Truncating RAM at %.8lx-%.8lx "
"to -%.8lx (vmalloc region overlap).\n",
bank->start, bank->start + bank->size - 1,
bank->start + newsize - 1);
bank->size = newsize;
}
#endif
j++;
}
mi->nr_banks = j;
meminfo.nr_banks = j;
}
static inline void prepare_page_table(struct meminfo *mi)
static inline void prepare_page_table(void)
{
unsigned long addr;
@@ -721,7 +739,7 @@ static inline void prepare_page_table(struct meminfo *mi)
* Clear out all the kernel space mappings, except for the first
* memory bank, up to the end of the vmalloc region.
*/
for (addr = __phys_to_virt(mi->bank[0].start + mi->bank[0].size);
for (addr = __phys_to_virt(bank_phys_end(&meminfo.bank[0]));
addr < VMALLOC_END; addr += PGDIR_SIZE)
pmd_clear(pmd_off_k(addr));
}
@@ -880,14 +898,14 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
* paging_init() sets up the page tables, initialises the zone memory
* maps, and sets up the zero page, bad page and bad page tables.
*/
void __init paging_init(struct meminfo *mi, struct machine_desc *mdesc)
void __init paging_init(struct machine_desc *mdesc)
{
void *zero_page;
build_mem_type_table();
sanity_check_meminfo(mi);
prepare_page_table(mi);
bootmem_init(mi);
sanity_check_meminfo();
prepare_page_table();
bootmem_init();
devicemaps_init(mdesc);
top_pmd = pmd_off_k(0xffff0000);