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authorHelge Deller <deller@gmx.de>2015-11-22 00:07:44 +0100
committerHelge Deller <deller@gmx.de>2015-11-22 12:23:19 +0100
commit41b85a1163386f8328ad570f383973cb3975d2fa (patch)
tree37a8970781d2bb57603966f7e7e0722346a88e5e /arch/parisc/mm/init.c
parentparisc: Add Huge Page and HUGETLBFS support (diff)
downloadlinux-dev-41b85a1163386f8328ad570f383973cb3975d2fa.tar.xz
linux-dev-41b85a1163386f8328ad570f383973cb3975d2fa.zip
parisc: Map kernel text and data on huge pages
Adjust the linker script and map_pages() to map kernel text and data on physical 1MB huge/large pages. Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to '')
-rw-r--r--arch/parisc/mm/init.c40
1 files changed, 17 insertions, 23 deletions
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index c229427fa546..ac90df1119bd 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -407,15 +407,11 @@ static void __init map_pages(unsigned long start_vaddr,
unsigned long vaddr;
unsigned long ro_start;
unsigned long ro_end;
- unsigned long fv_addr;
- unsigned long gw_addr;
- extern const unsigned long fault_vector_20;
- extern void * const linux_gateway_page;
+ unsigned long kernel_end;
ro_start = __pa((unsigned long)_text);
ro_end = __pa((unsigned long)&data_start);
- fv_addr = __pa((unsigned long)&fault_vector_20) & PAGE_MASK;
- gw_addr = __pa((unsigned long)&linux_gateway_page) & PAGE_MASK;
+ kernel_end = __pa((unsigned long)&_end);
end_paddr = start_paddr + size;
@@ -473,24 +469,25 @@ static void __init map_pages(unsigned long start_vaddr,
for (tmp2 = start_pte; tmp2 < PTRS_PER_PTE; tmp2++, pg_table++) {
pte_t pte;
- /*
- * Map the fault vector writable so we can
- * write the HPMC checksum.
- */
if (force)
pte = __mk_pte(address, pgprot);
- else if (parisc_text_address(vaddr) &&
- address != fv_addr)
+ else if (parisc_text_address(vaddr)) {
pte = __mk_pte(address, PAGE_KERNEL_EXEC);
+ if (address >= ro_start && address < kernel_end)
+ pte = pte_mkhuge(pte);
+ }
else
#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
- if (address >= ro_start && address < ro_end
- && address != fv_addr
- && address != gw_addr)
- pte = __mk_pte(address, PAGE_KERNEL_RO);
- else
+ if (address >= ro_start && address < ro_end) {
+ pte = __mk_pte(address, PAGE_KERNEL_EXEC);
+ pte = pte_mkhuge(pte);
+ } else
#endif
+ {
pte = __mk_pte(address, pgprot);
+ if (address >= ro_start && address < kernel_end)
+ pte = pte_mkhuge(pte);
+ }
if (address >= end_paddr) {
if (force)
@@ -534,15 +531,12 @@ void free_initmem(void)
/* force the kernel to see the new TLB entries */
__flush_tlb_range(0, init_begin, init_end);
- /* Attempt to catch anyone trying to execute code here
- * by filling the page with BRK insns.
- */
- memset((void *)init_begin, 0x00, init_end - init_begin);
+
/* finally dump all the instructions which were cached, since the
* pages are no-longer executable */
flush_icache_range(init_begin, init_end);
- free_initmem_default(-1);
+ free_initmem_default(POISON_FREE_INITMEM);
/* set up a new led state on systems shipped LED State panel */
pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
@@ -712,8 +706,8 @@ static void __init pagetable_init(void)
unsigned long size;
start_paddr = pmem_ranges[range].start_pfn << PAGE_SHIFT;
- end_paddr = start_paddr + (pmem_ranges[range].pages << PAGE_SHIFT);
size = pmem_ranges[range].pages << PAGE_SHIFT;
+ end_paddr = start_paddr + size;
map_pages((unsigned long)__va(start_paddr), start_paddr,
size, PAGE_KERNEL, 0);