[PATCH] powerpc: merge code values for identifying platforms

This patch merges platform codes.  systemcfg->platform is no longer used,
systemcfg use in general is deprecated as much as possible (and renamed
_systemcfg before it gets completely moved elsewhere in a future patch),
_machine is now used on ppc64 along as ppc32.  Platform codes aren't gone
yet but we are getting a step closer. A bunch of asm code in head[_64].S
is also turned into C code.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 20 insertions, 9 deletions

diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index c8c9c2df97e9..706e8a63ced9 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -84,10 +84,11 @@
 extern unsigned long dart_tablebase;
 #endif /* CONFIG_U3_DART */
 
+static unsigned long _SDR1;
+struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT];
+
 hpte_t *htab_address;
 unsigned long htab_hash_mask;
-unsigned long _SDR1;
-struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT];
 int mmu_linear_psize = MMU_PAGE_4K;
 int mmu_virtual_psize = MMU_PAGE_4K;
 #ifdef CONFIG_HUGETLB_PAGE
@@ -165,7 +166,7 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
 		 * normal insert callback here.
 		 */
 #ifdef CONFIG_PPC_ISERIES
-		if (systemcfg->platform == PLATFORM_ISERIES_LPAR)
+		if (_machine == PLATFORM_ISERIES_LPAR)
 			ret = iSeries_hpte_insert(hpteg, va,
 						  virt_to_abs(paddr),
 						  tmp_mode,
@@ -174,7 +175,7 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
 		else
 #endif
 #ifdef CONFIG_PPC_PSERIES
-		if (systemcfg->platform & PLATFORM_LPAR)
+		if (_machine & PLATFORM_LPAR)
 			ret = pSeries_lpar_hpte_insert(hpteg, va,
 						       virt_to_abs(paddr),
 						       tmp_mode,
@@ -293,7 +294,7 @@ static void __init htab_init_page_sizes(void)
 	 * Not in the device-tree, let's fallback on known size
 	 * list for 16M capable GP & GR
 	 */
-	if ((systemcfg->platform != PLATFORM_ISERIES_LPAR) &&
+	if ((_machine != PLATFORM_ISERIES_LPAR) &&
 	    cpu_has_feature(CPU_FTR_16M_PAGE))
 		memcpy(mmu_psize_defs, mmu_psize_defaults_gp,
 		       sizeof(mmu_psize_defaults_gp));
@@ -364,7 +365,7 @@ static int __init htab_dt_scan_pftsize(unsigned long node,
 
 static unsigned long __init htab_get_table_size(void)
 {
-	unsigned long rnd_mem_size, pteg_count;
+	unsigned long mem_size, rnd_mem_size, pteg_count;
 
 	/* If hash size isn't already provided by the platform, we try to
 	 * retreive it from the device-tree. If it's not there neither, we
@@ -376,8 +377,9 @@ static unsigned long __init htab_get_table_size(void)
 		return 1UL << ppc64_pft_size;
 
 	/* round mem_size up to next power of 2 */
-	rnd_mem_size = 1UL << __ilog2(systemcfg->physicalMemorySize);
-	if (rnd_mem_size < systemcfg->physicalMemorySize)
+	mem_size = lmb_phys_mem_size();
+	rnd_mem_size = 1UL << __ilog2(mem_size);
+	if (rnd_mem_size < mem_size)
 		rnd_mem_size <<= 1;
 
 	/* # pages / 2 */
@@ -419,7 +421,7 @@ void __init htab_initialize(void)
 
 	htab_hash_mask = pteg_count - 1;
 
-	if (systemcfg->platform & PLATFORM_LPAR) {
+	if (platform_is_lpar()) {
 		/* Using a hypervisor which owns the htab */
 		htab_address = NULL;
 		_SDR1 = 0; 
@@ -440,6 +442,9 @@ void __init htab_initialize(void)
 
 		/* Initialize the HPT with no entries */
 		memset((void *)table, 0, htab_size_bytes);
+
+		/* Set SDR1 */
+		mtspr(SPRN_SDR1, _SDR1);
 	}
 
 	mode_rw = _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_COHERENT | PP_RWXX;
@@ -509,6 +514,12 @@ void __init htab_initialize(void)
 #undef KB
 #undef MB
 
+void __init htab_initialize_secondary(void)
+{
+	if (!platform_is_lpar())
+		mtspr(SPRN_SDR1, _SDR1);
+}
+
 /*
  * Called by asm hashtable.S for doing lazy icache flush
  */