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Diffstat (limited to 'arch/sparc64/mm/init.c')
-rw-r--r--arch/sparc64/mm/init.c30
1 files changed, 28 insertions, 2 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index b1a1ee0cc6b..f146071a4b2 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -59,8 +59,10 @@ unsigned long kern_linear_pte_xor[2] __read_mostly;
*/
unsigned long kpte_linear_bitmap[KPTE_BITMAP_BYTES / sizeof(unsigned long)];
+#ifndef CONFIG_DEBUG_PAGEALLOC
/* A special kernel TSB for 4MB and 256MB linear mappings. */
struct tsb swapper_4m_tsb[KERNEL_TSB4M_NENTRIES];
+#endif
#define MAX_BANKS 32
@@ -1301,7 +1303,12 @@ static void __init tsb_phys_patch(void)
}
/* Don't mark as init, we give this to the Hypervisor. */
-static struct hv_tsb_descr ktsb_descr[2];
+#ifndef CONFIG_DEBUG_PAGEALLOC
+#define NUM_KTSB_DESCR 2
+#else
+#define NUM_KTSB_DESCR 1
+#endif
+static struct hv_tsb_descr ktsb_descr[NUM_KTSB_DESCR];
extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES];
static void __init sun4v_ktsb_init(void)
@@ -1340,6 +1347,7 @@ static void __init sun4v_ktsb_init(void)
ktsb_descr[0].tsb_base = ktsb_pa;
ktsb_descr[0].resv = 0;
+#ifndef CONFIG_DEBUG_PAGEALLOC
/* Second KTSB for 4MB/256MB mappings. */
ktsb_pa = (kern_base +
((unsigned long)&swapper_4m_tsb[0] - KERNBASE));
@@ -1352,6 +1360,7 @@ static void __init sun4v_ktsb_init(void)
ktsb_descr[1].ctx_idx = 0;
ktsb_descr[1].tsb_base = ktsb_pa;
ktsb_descr[1].resv = 0;
+#endif
}
void __cpuinit sun4v_ktsb_register(void)
@@ -1364,7 +1373,7 @@ void __cpuinit sun4v_ktsb_register(void)
pa = kern_base + ((unsigned long)&ktsb_descr[0] - KERNBASE);
func = HV_FAST_MMU_TSB_CTX0;
- arg0 = 2;
+ arg0 = NUM_KTSB_DESCR;
arg1 = pa;
__asm__ __volatile__("ta %6"
: "=&r" (func), "=&r" (arg0), "=&r" (arg1)
@@ -1393,7 +1402,9 @@ void __init paging_init(void)
/* Invalidate both kernel TSBs. */
memset(swapper_tsb, 0x40, sizeof(swapper_tsb));
+#ifndef CONFIG_DEBUG_PAGEALLOC
memset(swapper_4m_tsb, 0x40, sizeof(swapper_4m_tsb));
+#endif
if (tlb_type == hypervisor)
sun4v_pgprot_init();
@@ -1725,8 +1736,13 @@ static void __init sun4u_pgprot_init(void)
pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4U | __DIRTY_BITS_4U |
__ACCESS_BITS_4U | _PAGE_E_4U);
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4U) ^
+ 0xfffff80000000000;
+#else
kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4U) ^
0xfffff80000000000;
+#endif
kern_linear_pte_xor[0] |= (_PAGE_CP_4U | _PAGE_CV_4U |
_PAGE_P_4U | _PAGE_W_4U);
@@ -1769,13 +1785,23 @@ static void __init sun4v_pgprot_init(void)
_PAGE_E = _PAGE_E_4V;
_PAGE_CACHE = _PAGE_CACHE_4V;
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^
+ 0xfffff80000000000;
+#else
kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4V) ^
0xfffff80000000000;
+#endif
kern_linear_pte_xor[0] |= (_PAGE_CP_4V | _PAGE_CV_4V |
_PAGE_P_4V | _PAGE_W_4V);
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^
+ 0xfffff80000000000;
+#else
kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZ256MB_4V) ^
0xfffff80000000000;
+#endif
kern_linear_pte_xor[1] |= (_PAGE_CP_4V | _PAGE_CV_4V |
_PAGE_P_4V | _PAGE_W_4V);