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Date:      Sun, 26 Jun 2011 19:02:34 +0000 (UTC)
From:      Andreas Tobler <andreast@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-projects@freebsd.org
Subject:   svn commit: r223578 - in projects/pseries/powerpc: aim pseries
Message-ID:  <201106261902.p5QJ2Yr8064275@svn.freebsd.org>
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Author: andreast
Date: Sun Jun 26 19:02:34 2011
New Revision: 223578
URL: http://svn.freebsd.org/changeset/base/223578

Log:
  Set the default large page to 16MB on PowerMac's.
  Add a property scan for PAPR compatible machines to get the large page
  information from there.

Modified:
  projects/pseries/powerpc/aim/mmu_oea64.c
  projects/pseries/powerpc/aim/mmu_oea64.h
  projects/pseries/powerpc/pseries/mmu_phyp.c

Modified: projects/pseries/powerpc/aim/mmu_oea64.c
==============================================================================
--- projects/pseries/powerpc/aim/mmu_oea64.c	Sun Jun 26 18:44:00 2011	(r223577)
+++ projects/pseries/powerpc/aim/mmu_oea64.c	Sun Jun 26 19:02:34 2011	(r223578)
@@ -257,7 +257,7 @@ uintptr_t	moea64_scratchpage_pte[2];
 struct	mtx	moea64_scratchpage_mtx;
 
 uint64_t 	moea64_large_page_mask = 0;
-int		moea64_large_page_size = 0;
+uint64_t	moea64_large_page_size = 0;
 int		moea64_large_page_shift = 0;
 
 /*
@@ -554,6 +554,9 @@ moea64_probe_large_page(void)
 	uint16_t pvr = mfpvr() >> 16;
 
 	switch (pvr) {
+	case IBMPOWER7:
+		moea64_large_page_size = 0;
+		break;
 	case IBM970:
 	case IBM970FX:
 	case IBM970MP:
@@ -562,12 +565,9 @@ moea64_probe_large_page(void)
 		powerpc_sync(); isync();
 		
 		/* FALLTHROUGH */
-	case IBMCELLBE:
+	default:
 		moea64_large_page_size = 0x1000000; /* 16 MB */
 		moea64_large_page_shift = 24;
-		break;
-	default:
-		moea64_large_page_size = 0;
 	}
 
 	moea64_large_page_mask = moea64_large_page_size - 1;

Modified: projects/pseries/powerpc/aim/mmu_oea64.h
==============================================================================
--- projects/pseries/powerpc/aim/mmu_oea64.h	Sun Jun 26 18:44:00 2011	(r223577)
+++ projects/pseries/powerpc/aim/mmu_oea64.h	Sun Jun 26 19:02:34 2011	(r223578)
@@ -70,6 +70,7 @@ extern u_int	moea64_pte_overflow;
 
 extern struct pvo_head *moea64_pvo_table;
 extern int		moea64_large_page_shift;
+extern uint64_t		moea64_large_page_size;
 extern u_int		moea64_pteg_count;
 extern u_int		moea64_pteg_mask;
 

Modified: projects/pseries/powerpc/pseries/mmu_phyp.c
==============================================================================
--- projects/pseries/powerpc/pseries/mmu_phyp.c	Sun Jun 26 18:44:00 2011	(r223577)
+++ projects/pseries/powerpc/pseries/mmu_phyp.c	Sun Jun 26 19:02:34 2011	(r223578)
@@ -99,8 +99,9 @@ mphyp_bootstrap(mmu_t mmup, vm_offset_t 
 	uint64_t final_pteg_count = 0;
 	char buf[8];
 	uint32_t prop[2];
+	uint32_t nptlp, shift = 0, slb_encoding = 0; 
         phandle_t dev, node, root;
-        int res;
+        int idx, len, res;
 
 	moea64_early_bootstrap(mmup, kernelstart, kernelend);
 
@@ -133,6 +134,37 @@ mphyp_bootstrap(mmu_t mmup, vm_offset_t 
 
 	moea64_pteg_count = final_pteg_count / sizeof(struct lpteg);
 
+	/* Scan the large page size property for PAPR compatible machines.
+	   See PAPR D.5 Changes to Section 5.1.4, 'CPU Node Properties'
+	   for the encoding of the property.
+	*/
+
+	len = OF_getproplen(node, "ibm,segment-page-sizes");
+	if (len > 0) {
+		/* We have to use a variable length array on the stack
+		   since we have very limited stack space.
+		*/
+		cell_t arr[len/sizeof(cell_t)];
+		res = OF_getprop(node, "ibm,segment-page-sizes", &arr,
+				 sizeof(arr));
+		len /= 4;
+		idx = 0;
+		while (len > 0) {
+			shift = arr[idx];
+			slb_encoding = arr[idx + 1];
+			nptlp = arr[idx + 2];
+			idx += 3;
+			len -= 3;
+			while (len > 0 && nptlp) {
+				idx += 2;
+				len -= 2;
+				nptlp--;
+			}
+		}
+		moea64_large_page_shift = shift;
+		moea64_large_page_size = 1 << shift;
+	}
+
 	moea64_mid_bootstrap(mmup, kernelstart, kernelend);
 	moea64_late_bootstrap(mmup, kernelstart, kernelend);
 }
@@ -208,7 +240,7 @@ mphyp_pte_change(mmu_t mmu, uintptr_t sl
 	if (result != H_SUCCESS)
 		panic("mphyp_pte_change() invalidation failure: %ld\n", result);
 	result = phyp_pft_hcall(H_ENTER, H_EXACT, slot, pvo_pt->pte_hi,
-	    pvo_pt->pte_lo, &index, &evicted.pte_lo, &junk);
+				pvo_pt->pte_lo, &index, &evicted.pte_lo, &junk);
 	if (result != H_SUCCESS)
 		panic("mphyp_pte_change() insertion failure: %ld\n", result);
 }

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