[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>

15 files changed, 91 insertions, 156 deletions

diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index b75757251994..8793102711a8 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -106,7 +106,6 @@ int main(void)
 	DEFINE(ICACHEL1LINESIZE, offsetof(struct ppc64_caches, iline_size));
 	DEFINE(ICACHEL1LOGLINESIZE, offsetof(struct ppc64_caches, log_iline_size));
 	DEFINE(ICACHEL1LINESPERPAGE, offsetof(struct ppc64_caches, ilines_per_page));
-	DEFINE(PLATFORM, offsetof(struct systemcfg, platform));
 	DEFINE(PLATFORM_LPAR, PLATFORM_LPAR);
 
 	/* paca */
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 16ab40daa738..8a8bf79ef044 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -28,7 +28,6 @@
 #include <asm/reg.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
-#include <asm/systemcfg.h>
 #include <asm/ppc_asm.h>
 #include <asm/asm-offsets.h>
 #include <asm/bug.h>
@@ -1697,25 +1696,14 @@ _GLOBAL(pmac_secondary_start)
  *   SPRG3 = paca virtual address
  */
 _GLOBAL(__secondary_start)
+	/* Set thread priority to MEDIUM */
+	HMT_MEDIUM
 
-	HMT_MEDIUM			/* Set thread priority to MEDIUM */
-
+	/* Load TOC */
 	ld	r2,PACATOC(r13)
-	li	r6,0
-	stb	r6,PACAPROCENABLED(r13)
-
-#ifndef CONFIG_PPC_ISERIES
-	/* Initialize the page table pointer register. */
-	LOADADDR(r6,_SDR1)
-	ld	r6,0(r6)		/* get the value of _SDR1	 */
-	mtspr	SPRN_SDR1,r6			/* set the htab location	 */
-#endif
-	/* Initialize the first segment table (or SLB) entry		 */
-	ld	r3,PACASTABVIRT(r13)	/* get addr of segment table	 */
-BEGIN_FTR_SECTION
-	bl	.stab_initialize
-END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
-	bl	.slb_initialize
+
+	/* Do early setup for that CPU (stab, slb, hash table pointer) */
+	bl	.early_setup_secondary
 
 	/* Initialize the kernel stack.  Just a repeat for iSeries.	 */
 	LOADADDR(r3,current_set)
@@ -1724,37 +1712,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
 	addi	r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
 	std	r1,PACAKSAVE(r13)
 
-	ld	r3,PACASTABREAL(r13)	/* get raddr of segment table	 */
-	ori	r4,r3,1			/* turn on valid bit		 */
-
-#ifdef CONFIG_PPC_ISERIES
-	li	r0,-1			/* hypervisor call */
-	li	r3,1
-	sldi	r3,r3,63		/* 0x8000000000000000 */
-	ori	r3,r3,4			/* 0x8000000000000004 */
-	sc				/* HvCall_setASR */
-#else
-	/* set the ASR */
-	ld	r3,systemcfg@got(r2)	/* r3 = ptr to systemcfg	 */
-	ld	r3,0(r3)
-	lwz	r3,PLATFORM(r3)		/* r3 = platform flags		 */
-	andi.	r3,r3,PLATFORM_LPAR	/* Test if bit 0 is set (LPAR bit) */
-	beq	98f			/* branch if result is 0  */
-	mfspr	r3,SPRN_PVR
-	srwi	r3,r3,16
-	cmpwi	r3,0x37			/* SStar  */
-	beq	97f
-	cmpwi	r3,0x36			/* IStar  */
-	beq	97f
-	cmpwi	r3,0x34			/* Pulsar */
-	bne	98f
-97:	li	r3,H_SET_ASR		/* hcall = H_SET_ASR */
-	HVSC				/* Invoking hcall */
-	b	99f
-98:					/* !(rpa hypervisor) || !(star)  */
-	mtasr	r4			/* set the stab location	 */
-99:
-#endif
+	/* Clear backchain so we get nice backtraces */
 	li	r7,0
 	mtlr	r7
 
@@ -1777,6 +1735,7 @@ _GLOBAL(start_secondary_prolog)
 	li	r3,0
 	std	r3,0(r1)		/* Zero the stack frame pointer	*/
 	bl	.start_secondary
+	b	.
 #endif
 
 /*
@@ -1896,40 +1855,6 @@ _STATIC(start_here_multiplatform)
 	mr	r3,r31
  	bl	.early_setup
 
-	/* set the ASR */
-	ld	r3,PACASTABREAL(r13)
-	ori	r4,r3,1			/* turn on valid bit		 */
-	ld	r3,systemcfg@got(r2)	/* r3 = ptr to systemcfg */
-	ld	r3,0(r3)
-	lwz	r3,PLATFORM(r3)		/* r3 = platform flags */
-	andi.	r3,r3,PLATFORM_LPAR	/* Test if bit 0 is set (LPAR bit) */
-	beq	98f			/* branch if result is 0  */
-	mfspr	r3,SPRN_PVR
-	srwi	r3,r3,16
-	cmpwi	r3,0x37			/* SStar */
-	beq	97f
-	cmpwi	r3,0x36			/* IStar  */
-	beq	97f
-	cmpwi	r3,0x34			/* Pulsar */
-	bne	98f
-97:	li	r3,H_SET_ASR		/* hcall = H_SET_ASR */
-	HVSC				/* Invoking hcall */
-	b	99f
-98:					/* !(rpa hypervisor) || !(star) */
-	mtasr	r4			/* set the stab location	*/
-99:
-	/* Set SDR1 (hash table pointer) */
-	ld	r3,systemcfg@got(r2)	/* r3 = ptr to systemcfg */
-	ld	r3,0(r3)
-	lwz	r3,PLATFORM(r3)		/* r3 = platform flags */
-	/* Test if bit 0 is set (LPAR bit) */
-	andi.	r3,r3,PLATFORM_LPAR
-	bne	98f			/* branch if result is !0  */
-	LOADADDR(r6,_SDR1)		/* Only if NOT LPAR */
-	add	r6,r6,r26
-	ld	r6,0(r6)		/* get the value of _SDR1 */
-	mtspr	SPRN_SDR1,r6			/* set the htab location  */
-98: 
 	LOADADDR(r3,.start_here_common)
 	SET_REG_TO_CONST(r4, MSR_KERNEL)
 	mtspr	SPRN_SRR0,r3
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 179948eb0580..3cf2517c5f91 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -15,7 +15,7 @@
 #include <asm/processor.h>
 #include <asm/ptrace.h>
 #include <asm/page.h>
-
+#include <asm/systemcfg.h>
 #include <asm/lppaca.h>
 #include <asm/iseries/it_lp_queue.h>
 #include <asm/paca.h>
@@ -24,8 +24,7 @@ static union {
 	struct systemcfg	data;
 	u8			page[PAGE_SIZE];
 } systemcfg_store __attribute__((__section__(".data.page.aligned")));
-struct systemcfg *systemcfg = &systemcfg_store.data;
-EXPORT_SYMBOL(systemcfg);
+struct systemcfg *_systemcfg = &systemcfg_store.data;
 
 
 /* This symbol is provided by the linker - let it fill in the paca
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 5d9fd0369aad..5dcf4ba05ee8 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -188,9 +188,6 @@ EXPORT_SYMBOL(adb_try_handler_change);
 EXPORT_SYMBOL(cuda_request);
 EXPORT_SYMBOL(cuda_poll);
 #endif /* CONFIG_ADB_CUDA */
-#if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_PPC32)
-EXPORT_SYMBOL(_machine);
-#endif
 #ifdef CONFIG_PPC_PMAC
 EXPORT_SYMBOL(sys_ctrler);
 #endif
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 5af39f866735..1bf3642cb859 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -48,9 +48,6 @@
 #include <asm/machdep.h>
 #include <asm/pSeries_reconfig.h>
 #include <asm/pci-bridge.h>
-#ifdef CONFIG_PPC64
-#include <asm/systemcfg.h>
-#endif
 
 #ifdef DEBUG
 #define DBG(fmt...) printk(KERN_ERR fmt)
@@ -391,7 +388,7 @@ static int __devinit finish_node_interrupts(struct device_node *np,
 
 #ifdef CONFIG_PPC64
 		/* We offset irq numbers for the u3 MPIC by 128 in PowerMac */
-		if (systemcfg->platform == PLATFORM_POWERMAC && ic && ic->parent) {
+		if (_machine == PLATFORM_POWERMAC && ic && ic->parent) {
 			char *name = get_property(ic->parent, "name", NULL);
 			if (name && !strcmp(name, "u3"))
 				np->intrs[intrcount].line += 128;
@@ -1161,13 +1158,9 @@ static int __init early_init_dt_scan_chosen(unsigned long node,
 	prop = (u32 *)of_get_flat_dt_prop(node, "linux,platform", NULL);
 	if (prop == NULL)
 		return 0;
-#ifdef CONFIG_PPC64
-	systemcfg->platform = *prop;
-#else
 #ifdef CONFIG_PPC_MULTIPLATFORM
 	_machine = *prop;
 #endif
-#endif
 
 #ifdef CONFIG_PPC64
 	/* check if iommu is forced on or off */
@@ -1346,9 +1339,6 @@ void __init early_init_devtree(void *params)
 	of_scan_flat_dt(early_init_dt_scan_memory, NULL);
 	lmb_enforce_memory_limit(memory_limit);
 	lmb_analyze();
-#ifdef CONFIG_PPC64
-	systemcfg->physicalMemorySize = lmb_phys_mem_size();
-#endif
 	lmb_reserve(0, __pa(klimit));
 
 	DBG("Phys. mem: %lx\n", lmb_phys_mem_size());
@@ -1915,7 +1905,7 @@ static int of_finish_dynamic_node(struct device_node *node,
 	/* We don't support that function on PowerMac, at least
 	 * not yet
 	 */
-	if (systemcfg->platform == PLATFORM_POWERMAC)
+	if (_machine == PLATFORM_POWERMAC)
 		return -ENODEV;
 
 	/* fix up new node's linux_phandle field */
@@ -1999,9 +1989,11 @@ int prom_add_property(struct device_node* np, struct property* prop)
 	*next = prop;
 	write_unlock(&devtree_lock);
 
+#ifdef CONFIG_PROC_DEVICETREE
 	/* try to add to proc as well if it was initialized */
 	if (np->pde)
 		proc_device_tree_add_prop(np->pde, prop);
+#endif /* CONFIG_PROC_DEVICETREE */
 
 	return 0;
 }
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 09db1bb9ec91..4ce0105c308e 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -117,11 +117,6 @@ int of_workarounds;
 #define prom_debug(x...)
 #endif
 
-#ifdef CONFIG_PPC32
-#define PLATFORM_POWERMAC	_MACH_Pmac
-#define PLATFORM_CHRP		_MACH_chrp
-#endif
-
 
 typedef u32 prom_arg_t;
 
@@ -2078,7 +2073,8 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	/*
 	 * On pSeries, inform the firmware about our capabilities
 	 */
-	if (RELOC(of_platform) & PLATFORM_PSERIES)
+	if (RELOC(of_platform) == PLATFORM_PSERIES ||
+	    RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
 		prom_send_capabilities();
 #endif
 
diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
index 5bdd5b079d96..ae1a36449ccd 100644
--- a/arch/powerpc/kernel/rtas-proc.c
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -259,7 +259,7 @@ static int __init proc_rtas_init(void)
 {
 	struct proc_dir_entry *entry;
 
-	if (!(systemcfg->platform & PLATFORM_PSERIES))
+	if (_machine != PLATFORM_PSERIES && _machine != PLATFORM_PSERIES_LPAR)
 		return 1;
 
 	rtas_node = of_find_node_by_name(NULL, "rtas");
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 9d4e07f6f1ec..4283fa33f784 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -29,9 +29,6 @@
 #include <asm/delay.h>
 #include <asm/uaccess.h>
 #include <asm/lmb.h>
-#ifdef CONFIG_PPC64
-#include <asm/systemcfg.h>
-#endif
 
 struct rtas_t rtas = {
 	.lock = SPIN_LOCK_UNLOCKED
@@ -671,7 +668,7 @@ void __init rtas_initialize(void)
 	 * the stop-self token if any
 	 */
 #ifdef CONFIG_PPC64
-	if (systemcfg->platform == PLATFORM_PSERIES_LPAR)
+	if (_machine == PLATFORM_PSERIES_LPAR)
 		rtas_region = min(lmb.rmo_size, RTAS_INSTANTIATE_MAX);
 #endif
 	rtas_rmo_buf = lmb_alloc_base(RTAS_RMOBUF_MAX, PAGE_SIZE, rtas_region);
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 17c46a2e356d..06e4ef215627 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -33,6 +33,7 @@
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/processor.h>
+#include <asm/systemcfg.h>
 #include <asm/pgtable.h>
 #include <asm/smp.h>
 #include <asm/elf.h>
@@ -63,6 +64,11 @@
 #define DBG(fmt...)
 #endif
 
+#ifdef CONFIG_PPC_MULTIPLATFORM
+int _machine = 0;
+EXPORT_SYMBOL(_machine);
+#endif
+
 /*
  * This still seems to be needed... -- paulus
  */ 
@@ -513,8 +519,8 @@ void __init smp_setup_cpu_maps(void)
 	 * On pSeries LPAR, we need to know how many cpus
 	 * could possibly be added to this partition.
 	 */
-	if (systemcfg->platform == PLATFORM_PSERIES_LPAR &&
-				(dn = of_find_node_by_path("/rtas"))) {
+	if (_machine == PLATFORM_PSERIES_LPAR &&
+	    (dn = of_find_node_by_path("/rtas"))) {
 		int num_addr_cell, num_size_cell, maxcpus;
 		unsigned int *ireg;
 
@@ -558,7 +564,7 @@ void __init smp_setup_cpu_maps(void)
 			cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
 	}
 
-	systemcfg->processorCount = num_present_cpus();
+	_systemcfg->processorCount = num_present_cpus();
 #endif /* CONFIG_PPC64 */
 }
 #endif /* CONFIG_SMP */
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 55f485f78c00..f73d7681b2e9 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -72,8 +72,6 @@ unsigned int DMA_MODE_WRITE;
 int have_of = 1;
 
 #ifdef CONFIG_PPC_MULTIPLATFORM
-int _machine = 0;
-
 extern void prep_init(void);
 extern void pmac_init(void);
 extern void chrp_init(void);
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index fe39aac4f24d..be607b877a55 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -100,10 +100,9 @@ extern void udbg_init_maple_realmode(void);
 extern unsigned long klimit;
 
 extern void mm_init_ppc64(void);
-extern void stab_initialize(unsigned long stab);
-extern void htab_initialize(void);
 extern void early_init_devtree(void *flat_dt);
 extern void unflatten_device_tree(void);
+extern void check_for_initrd(void);
 
 int have_of = 1;
 int boot_cpuid = 0;
@@ -256,11 +255,10 @@ void __init early_setup(unsigned long dt_ptr)
 	 * Iterate all ppc_md structures until we find the proper
 	 * one for the current machine type
 	 */
-	DBG("Probing machine type for platform %x...\n",
-	    systemcfg->platform);
+	DBG("Probing machine type for platform %x...\n", _machine);
 
 	for (mach = machines; *mach; mach++) {
-		if ((*mach)->probe(systemcfg->platform))
+		if ((*mach)->probe(_machine))
 			break;
 	}
 	/* What can we do if we didn't find ? */
@@ -292,6 +290,28 @@ void __init early_setup(unsigned long dt_ptr)
 	DBG(" <- early_setup()\n");
 }
 
+#ifdef CONFIG_SMP
+void early_setup_secondary(void)
+{
+	struct paca_struct *lpaca = get_paca();
+
+	/* Mark enabled in PACA */
+	lpaca->proc_enabled = 0;
+
+	/* Initialize hash table for that CPU */
+	htab_initialize_secondary();
+
+	/* Initialize STAB/SLB. We use a virtual address as it works
+	 * in real mode on pSeries and we want a virutal address on
+	 * iSeries anyway
+	 */
+	if (cpu_has_feature(CPU_FTR_SLB))
+		slb_initialize();
+	else
+		stab_initialize(lpaca->stab_addr);
+}
+
+#endif /* CONFIG_SMP */
 
 #if defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
 void smp_release_cpus(void)
@@ -317,7 +337,8 @@ void smp_release_cpus(void)
 #endif /* CONFIG_SMP || CONFIG_KEXEC */
 
 /*
- * Initialize some remaining members of the ppc64_caches and systemcfg structures
+ * Initialize some remaining members of the ppc64_caches and systemcfg
+ * structures
  * (at least until we get rid of them completely). This is mostly some
  * cache informations about the CPU that will be used by cache flush
  * routines and/or provided to userland
@@ -342,7 +363,7 @@ static void __init initialize_cache_info(void)
 			const char *dc, *ic;
 
 			/* Then read cache informations */
-			if (systemcfg->platform == PLATFORM_POWERMAC) {
+			if (_machine == PLATFORM_POWERMAC) {
 				dc = "d-cache-block-size";
 				ic = "i-cache-block-size";
 			} else {
@@ -362,8 +383,8 @@ static void __init initialize_cache_info(void)
 				DBG("Argh, can't find dcache properties ! "
 				    "sizep: %p, lsizep: %p\n", sizep, lsizep);
 
-			systemcfg->dcache_size = ppc64_caches.dsize = size;
-			systemcfg->dcache_line_size =
+			_systemcfg->dcache_size = ppc64_caches.dsize = size;
+			_systemcfg->dcache_line_size =
 				ppc64_caches.dline_size = lsize;
 			ppc64_caches.log_dline_size = __ilog2(lsize);
 			ppc64_caches.dlines_per_page = PAGE_SIZE / lsize;
@@ -380,8 +401,8 @@ static void __init initialize_cache_info(void)
 				DBG("Argh, can't find icache properties ! "
 				    "sizep: %p, lsizep: %p\n", sizep, lsizep);
 
-			systemcfg->icache_size = ppc64_caches.isize = size;
-			systemcfg->icache_line_size =
+			_systemcfg->icache_size = ppc64_caches.isize = size;
+			_systemcfg->icache_line_size =
 				ppc64_caches.iline_size = lsize;
 			ppc64_caches.log_iline_size = __ilog2(lsize);
 			ppc64_caches.ilines_per_page = PAGE_SIZE / lsize;
@@ -389,10 +410,12 @@ static void __init initialize_cache_info(void)
 	}
 
 	/* Add an eye catcher and the systemcfg layout version number */
-	strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
-	systemcfg->version.major = SYSTEMCFG_MAJOR;
-	systemcfg->version.minor = SYSTEMCFG_MINOR;
-	systemcfg->processor = mfspr(SPRN_PVR);
+	strcpy(_systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
+	_systemcfg->version.major = SYSTEMCFG_MAJOR;
+	_systemcfg->version.minor = SYSTEMCFG_MINOR;
+	_systemcfg->processor = mfspr(SPRN_PVR);
+	_systemcfg->platform = _machine;
+	_systemcfg->physicalMemorySize = lmb_phys_mem_size();
 
 	DBG(" <- initialize_cache_info()\n");
 }
@@ -481,10 +504,10 @@ void __init setup_system(void)
 	printk("-----------------------------------------------------\n");
 	printk("ppc64_pft_size                = 0x%lx\n", ppc64_pft_size);
 	printk("ppc64_interrupt_controller    = 0x%ld\n", ppc64_interrupt_controller);
-	printk("systemcfg                     = 0x%p\n", systemcfg);
-	printk("systemcfg->platform           = 0x%x\n", systemcfg->platform);
-	printk("systemcfg->processorCount     = 0x%lx\n", systemcfg->processorCount);
-	printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize);
+	printk("systemcfg                     = 0x%p\n", _systemcfg);
+	printk("systemcfg->platform           = 0x%x\n", _systemcfg->platform);
+	printk("systemcfg->processorCount     = 0x%lx\n", _systemcfg->processorCount);
+	printk("systemcfg->physicalMemorySize = 0x%lx\n", _systemcfg->physicalMemorySize);
 	printk("ppc64_caches.dcache_line_size = 0x%x\n",
 			ppc64_caches.dline_size);
 	printk("ppc64_caches.icache_line_size = 0x%x\n",
@@ -566,12 +589,12 @@ void __init setup_syscall_map(void)
 	for (i = 0; i < __NR_syscalls; i++) {
 		if (sys_call_table[i*2] != sys_ni_syscall) {
 			count64++;
-			systemcfg->syscall_map_64[i >> 5] |=
+			_systemcfg->syscall_map_64[i >> 5] |=
 				0x80000000UL >> (i & 0x1f);
 		}
 		if (sys_call_table[i*2+1] != sys_ni_syscall) {
 			count32++;
-			systemcfg->syscall_map_32[i >> 5] |=
+			_systemcfg->syscall_map_32[i >> 5] |=
 				0x80000000UL >> (i & 0x1f);
 		}
 	}
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 5c330c3366e4..7fd530898bd1 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -44,6 +44,7 @@
 #include <asm/cputable.h>
 #include <asm/system.h>
 #include <asm/mpic.h>
+#include <asm/systemcfg.h>
 #ifdef CONFIG_PPC64
 #include <asm/paca.h>
 #endif
@@ -368,7 +369,9 @@ int generic_cpu_disable(void)
 	if (cpu == boot_cpuid)
 		return -EBUSY;
 
-	systemcfg->processorCount--;
+#ifdef CONFIG_PPC64
+	_systemcfg->processorCount--;
+#endif
 	cpu_clear(cpu, cpu_online_map);
 	fixup_irqs(cpu_online_map);
 	return 0;
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index a8210ed5c686..9c921d1c4084 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -52,7 +52,6 @@
 #include <asm/semaphore.h>
 #include <asm/time.h>
 #include <asm/mmu_context.h>
-#include <asm/systemcfg.h>
 #include <asm/ppc-pci.h>
 
 /* readdir & getdents */
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index a6282b625b44..386006b3d616 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -271,13 +271,13 @@ static inline void update_gtod(u64 new_tb_stamp, u64 new_stamp_xsec,
 	 * tb_to_xs and stamp_xsec values are consistent.  If not, then it
 	 * loops back and reads them again until this criteria is met.
 	 */
-	++(systemcfg->tb_update_count);
+	++(_systemcfg->tb_update_count);
 	smp_wmb();
-	systemcfg->tb_orig_stamp = new_tb_stamp;
-	systemcfg->stamp_xsec = new_stamp_xsec;
-	systemcfg->tb_to_xs = new_tb_to_xs;
+	_systemcfg->tb_orig_stamp = new_tb_stamp;
+	_systemcfg->stamp_xsec = new_stamp_xsec;
+	_systemcfg->tb_to_xs = new_tb_to_xs;
 	smp_wmb();
-	++(systemcfg->tb_update_count);
+	++(_systemcfg->tb_update_count);
 #endif
 }
 
@@ -357,8 +357,9 @@ static void iSeries_tb_recal(void)
 				do_gtod.tb_ticks_per_sec = tb_ticks_per_sec;
 				tb_to_xs = divres.result_low;
 				do_gtod.varp->tb_to_xs = tb_to_xs;
-				systemcfg->tb_ticks_per_sec = tb_ticks_per_sec;
-				systemcfg->tb_to_xs = tb_to_xs;
+				_systemcfg->tb_ticks_per_sec =
+					tb_ticks_per_sec;
+				_systemcfg->tb_to_xs = tb_to_xs;
 			}
 			else {
 				printk( "Titan recalibrate: FAILED (difference > 4 percent)\n"
@@ -559,8 +560,8 @@ int do_settimeofday(struct timespec *tv)
 	update_gtod(tb_last_jiffy, new_xsec, do_gtod.varp->tb_to_xs);
 
 #ifdef CONFIG_PPC64
-	systemcfg->tz_minuteswest = sys_tz.tz_minuteswest;
-	systemcfg->tz_dsttime = sys_tz.tz_dsttime;
+	_systemcfg->tz_minuteswest = sys_tz.tz_minuteswest;
+	_systemcfg->tz_dsttime = sys_tz.tz_dsttime;
 #endif
 
 	write_sequnlock_irqrestore(&xtime_lock, flags);
@@ -711,11 +712,11 @@ void __init time_init(void)
 	do_gtod.varp->tb_to_xs = tb_to_xs;
 	do_gtod.tb_to_us = tb_to_us;
 #ifdef CONFIG_PPC64
-	systemcfg->tb_orig_stamp = tb_last_jiffy;
-	systemcfg->tb_update_count = 0;
-	systemcfg->tb_ticks_per_sec = tb_ticks_per_sec;
-	systemcfg->stamp_xsec = xtime.tv_sec * XSEC_PER_SEC;
-	systemcfg->tb_to_xs = tb_to_xs;
+	_systemcfg->tb_orig_stamp = tb_last_jiffy;
+	_systemcfg->tb_update_count = 0;
+	_systemcfg->tb_ticks_per_sec = tb_ticks_per_sec;
+	_systemcfg->stamp_xsec = xtime.tv_sec * XSEC_PER_SEC;
+	_systemcfg->tb_to_xs = tb_to_xs;
 #endif
 
 	time_freq = 0;
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 0578f8387603..2020bb7648fb 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -129,7 +129,7 @@ int die(const char *str, struct pt_regs *regs, long err)
 	nl = 1;
 #endif
 #ifdef CONFIG_PPC64
-	switch (systemcfg->platform) {
+	switch (_machine) {
 	case PLATFORM_PSERIES:
 		printk("PSERIES ");
 		nl = 1;