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powerpc: Book 3S MMU little endian support 

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2013-09-23 12:04:36 +10:00 committed by Benjamin Herrenschmidt
parent 32ee1e188e
commit 12f04f2be8
3 changed files with 46 additions and 42 deletions
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4
arch/powerpc/include/asm/mmu-hash64.h
View File

@ -135,8 +135,8 @@ extern char initial_stab[];
#ifndef __ASSEMBLY__
struct hash_pte {
unsigned long v;
unsigned long r;
__be64 v;
__be64 r;
};
extern struct hash_pte *htab_address;

46
arch/powerpc/mm/hash_native_64.c
View File

@ -35,7 +35,11 @@
#define DBG_LOW(fmt...)
#endif
#ifdef __BIG_ENDIAN__
#define HPTE_LOCK_BIT 3
#else
#define HPTE_LOCK_BIT (56+3)
#endif
DEFINE_RAW_SPINLOCK(native_tlbie_lock);
@ -172,7 +176,7 @@ static inline void tlbie(unsigned long vpn, int psize, int apsize,
static inline void native_lock_hpte(struct hash_pte *hptep)
{
unsigned long *word = &hptep->v;
unsigned long *word = (unsigned long *)&hptep->v;
while (1) {
if (!test_and_set_bit_lock(HPTE_LOCK_BIT, word))
@ -184,7 +188,7 @@ static inline void native_lock_hpte(struct hash_pte *hptep)
static inline void native_unlock_hpte(struct hash_pte *hptep)
{
unsigned long *word = &hptep->v;
unsigned long *word = (unsigned long *)&hptep->v;
clear_bit_unlock(HPTE_LOCK_BIT, word);
}
@ -204,10 +208,10 @@ static long native_hpte_insert(unsigned long hpte_group, unsigned long vpn,
}
for (i = 0; i < HPTES_PER_GROUP; i++) {
if (! (hptep->v & HPTE_V_VALID)) {
if (! (be64_to_cpu(hptep->v) & HPTE_V_VALID)) {
/* retry with lock held */
native_lock_hpte(hptep);
if (! (hptep->v & HPTE_V_VALID))
if (! (be64_to_cpu(hptep->v) & HPTE_V_VALID))
break;
native_unlock_hpte(hptep);
}
@ -226,14 +230,14 @@ static long native_hpte_insert(unsigned long hpte_group, unsigned long vpn,
i, hpte_v, hpte_r);
}
hptep->r = hpte_r;
hptep->r = cpu_to_be64(hpte_r);
/* Guarantee the second dword is visible before the valid bit */
eieio();
/*
* Now set the first dword including the valid bit
* NOTE: this also unlocks the hpte
*/
hptep->v = hpte_v;
hptep->v = cpu_to_be64(hpte_v);
__asm__ __volatile__ ("ptesync" : : : "memory");
@ -254,12 +258,12 @@ static long native_hpte_remove(unsigned long hpte_group)
for (i = 0; i < HPTES_PER_GROUP; i++) {
hptep = htab_address + hpte_group + slot_offset;
hpte_v = hptep->v;
hpte_v = be64_to_cpu(hptep->v);
if ((hpte_v & HPTE_V_VALID) && !(hpte_v & HPTE_V_BOLTED)) {
/* retry with lock held */
native_lock_hpte(hptep);
hpte_v = hptep->v;
hpte_v = be64_to_cpu(hptep->v);
if ((hpte_v & HPTE_V_VALID)
&& !(hpte_v & HPTE_V_BOLTED))
break;
@ -294,7 +298,7 @@ static long native_hpte_updatepp(unsigned long slot, unsigned long newpp,
native_lock_hpte(hptep);
hpte_v = hptep->v;
hpte_v = be64_to_cpu(hptep->v);
/*
* We need to invalidate the TLB always because hpte_remove doesn't do
* a tlb invalidate. If a hash bucket gets full, we "evict" a more/less
@ -308,8 +312,8 @@ static long native_hpte_updatepp(unsigned long slot, unsigned long newpp,
} else {
DBG_LOW(" -> hit\n");
/* Update the HPTE */
hptep->r = (hptep->r & ~(HPTE_R_PP | HPTE_R_N)) |
(newpp & (HPTE_R_PP | HPTE_R_N | HPTE_R_C));
hptep->r = cpu_to_be64((be64_to_cpu(hptep->r) & ~(HPTE_R_PP | HPTE_R_N)) |
(newpp & (HPTE_R_PP | HPTE_R_N | HPTE_R_C)));
}
native_unlock_hpte(hptep);
@ -334,7 +338,7 @@ static long native_hpte_find(unsigned long vpn, int psize, int ssize)
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
for (i = 0; i < HPTES_PER_GROUP; i++) {
hptep = htab_address + slot;
hpte_v = hptep->v;
hpte_v = be64_to_cpu(hptep->v);
if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID))
/* HPTE matches */
@ -369,8 +373,9 @@ static void native_hpte_updateboltedpp(unsigned long newpp, unsigned long ea,
hptep = htab_address + slot;
/* Update the HPTE */
hptep->r = (hptep->r & ~(HPTE_R_PP | HPTE_R_N)) |
(newpp & (HPTE_R_PP | HPTE_R_N));
hptep->r = cpu_to_be64((be64_to_cpu(hptep->r) &
~(HPTE_R_PP | HPTE_R_N)) |
(newpp & (HPTE_R_PP | HPTE_R_N)));
/*
* Ensure it is out of the tlb too. Bolted entries base and
* actual page size will be same.
@ -392,7 +397,7 @@ static void native_hpte_invalidate(unsigned long slot, unsigned long vpn,
want_v = hpte_encode_avpn(vpn, bpsize, ssize);
native_lock_hpte(hptep);
hpte_v = hptep->v;
hpte_v = be64_to_cpu(hptep->v);
/*
* We need to invalidate the TLB always because hpte_remove doesn't do
@ -458,7 +463,7 @@ static void native_hugepage_invalidate(struct mm_struct *mm,
hptep = htab_address + slot;
want_v = hpte_encode_avpn(vpn, psize, ssize);
native_lock_hpte(hptep);
hpte_v = hptep->v;
hpte_v = be64_to_cpu(hptep->v);
/* Even if we miss, we need to invalidate the TLB */
if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID))
@ -519,11 +524,12 @@ static void hpte_decode(struct hash_pte *hpte, unsigned long slot,
int *psize, int *apsize, int *ssize, unsigned long *vpn)
{
unsigned long avpn, pteg, vpi;
unsigned long hpte_v = hpte->v;
unsigned long hpte_v = be64_to_cpu(hpte->v);
unsigned long hpte_r = be64_to_cpu(hpte->r);
unsigned long vsid, seg_off;
int size, a_size, shift;
/* Look at the 8 bit LP value */
unsigned int lp = (hpte->r >> LP_SHIFT) & ((1 << LP_BITS) - 1);
unsigned int lp = (hpte_r >> LP_SHIFT) & ((1 << LP_BITS) - 1);
if (!(hpte_v & HPTE_V_LARGE)) {
size = MMU_PAGE_4K;
@ -612,7 +618,7 @@ static void native_hpte_clear(void)
* running, right? and for crash dump, we probably
* don't want to wait for a maybe bad cpu.
*/
hpte_v = hptep->v;
hpte_v = be64_to_cpu(hptep->v);
/*
* Call __tlbie() here rather than tlbie() since we
@ -664,7 +670,7 @@ static void native_flush_hash_range(unsigned long number, int local)
hptep = htab_address + slot;
want_v = hpte_encode_avpn(vpn, psize, ssize);
native_lock_hpte(hptep);
hpte_v = hptep->v;
hpte_v = be64_to_cpu(hptep->v);
if (!HPTE_V_COMPARE(hpte_v, want_v) ||
!(hpte_v & HPTE_V_VALID))
native_unlock_hpte(hptep);

38
arch/powerpc/mm/hash_utils_64.c
View File

@ -251,19 +251,18 @@ static int __init htab_dt_scan_seg_sizes(unsigned long node,
void *data)
{
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
u32 *prop;
__be32 *prop;
unsigned long size = 0;
/* We are scanning "cpu" nodes only */
if (type == NULL || strcmp(type, "cpu") != 0)
return 0;
prop = (u32 *)of_get_flat_dt_prop(node, "ibm,processor-segment-sizes",
&size);
prop = of_get_flat_dt_prop(node, "ibm,processor-segment-sizes", &size);
if (prop == NULL)
return 0;
for (; size >= 4; size -= 4, ++prop) {
if (prop[0] == 40) {
if (be32_to_cpu(prop[0]) == 40) {
DBG("1T segment support detected\n");
cur_cpu_spec->mmu_features |= MMU_FTR_1T_SEGMENT;
return 1;
@ -307,23 +306,22 @@ static int __init htab_dt_scan_page_sizes(unsigned long node,
void *data)
{
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
u32 *prop;
__be32 *prop;
unsigned long size = 0;
/* We are scanning "cpu" nodes only */
if (type == NULL || strcmp(type, "cpu") != 0)
return 0;
prop = (u32 *)of_get_flat_dt_prop(node,
"ibm,segment-page-sizes", &size);
prop = of_get_flat_dt_prop(node, "ibm,segment-page-sizes", &size);
if (prop != NULL) {
pr_info("Page sizes from device-tree:\n");
size /= 4;
cur_cpu_spec->mmu_features &= ~(MMU_FTR_16M_PAGE);
while(size > 0) {
unsigned int base_shift = prop[0];
unsigned int slbenc = prop[1];
unsigned int lpnum = prop[2];
unsigned int base_shift = be32_to_cpu(prop[0]);
unsigned int slbenc = be32_to_cpu(prop[1]);
unsigned int lpnum = be32_to_cpu(prop[2]);
struct mmu_psize_def *def;
int idx, base_idx;
@ -356,8 +354,8 @@ static int __init htab_dt_scan_page_sizes(unsigned long node,
def->tlbiel = 0;
while (size > 0 && lpnum) {
unsigned int shift = prop[0];
int penc = prop[1];
unsigned int shift = be32_to_cpu(prop[0]);
int penc = be32_to_cpu(prop[1]);
prop += 2; size -= 2;
lpnum--;
@ -390,8 +388,8 @@ static int __init htab_dt_scan_hugepage_blocks(unsigned long node,
const char *uname, int depth,
void *data) {
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
unsigned long *addr_prop;
u32 *page_count_prop;
__be64 *addr_prop;
__be32 *page_count_prop;
unsigned int expected_pages;
long unsigned int phys_addr;
long unsigned int block_size;
@ -405,12 +403,12 @@ static int __init htab_dt_scan_hugepage_blocks(unsigned long node,
page_count_prop = of_get_flat_dt_prop(node, "ibm,expected#pages", NULL);
if (page_count_prop == NULL)
return 0;
expected_pages = (1 << page_count_prop[0]);
expected_pages = (1 << be32_to_cpu(page_count_prop[0]));
addr_prop = of_get_flat_dt_prop(node, "reg", NULL);
if (addr_prop == NULL)
return 0;
phys_addr = addr_prop[0];
block_size = addr_prop[1];
phys_addr = be64_to_cpu(addr_prop[0]);
block_size = be64_to_cpu(addr_prop[1]);
if (block_size != (16 * GB))
return 0;
printk(KERN_INFO "Huge page(16GB) memory: "
@ -534,16 +532,16 @@ static int __init htab_dt_scan_pftsize(unsigned long node,
void *data)
{
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
u32 *prop;
__be32 *prop;
/* We are scanning "cpu" nodes only */
if (type == NULL || strcmp(type, "cpu") != 0)
return 0;
prop = (u32 *)of_get_flat_dt_prop(node, "ibm,pft-size", NULL);
prop = of_get_flat_dt_prop(node, "ibm,pft-size", NULL);
if (prop != NULL) {
/* pft_size[0] is the NUMA CEC cookie */
ppc64_pft_size = prop[1];
ppc64_pft_size = be32_to_cpu(prop[1]);
return 1;
}
return 0;