[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>

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 */

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

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

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

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;
 }

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
 

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");

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);

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 */

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);

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);
 		}
 	}

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;

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 */

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;

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;

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
  */

arch/powerpc/mm/stab.c

@@ -20,6 +20,7 @@
 #include <asm/cputable.h>
 #include <asm/lmb.h>
 #include <asm/abs_addr.h>
+#include <asm/firmware.h>
 
 struct stab_entry {
 	unsigned long esid_data;
@@ -256,7 +257,7 @@ void stabs_alloc(void)
 
 		paca[cpu].stab_addr = newstab;
 		paca[cpu].stab_real = virt_to_abs(newstab);
-		printk(KERN_DEBUG "Segment table for CPU %d at 0x%lx "
+		printk(KERN_INFO "Segment table for CPU %d at 0x%lx "
 		       "virtual, 0x%lx absolute\n",
 		       cpu, paca[cpu].stab_addr, paca[cpu].stab_real);
 	}
@@ -270,10 +271,28 @@ void stabs_alloc(void)
 void stab_initialize(unsigned long stab)
 {
 	unsigned long vsid = get_kernel_vsid(KERNELBASE);
+	unsigned long stabreal;
 
 	asm volatile("isync; slbia; isync":::"memory");
 	make_ste(stab, GET_ESID(KERNELBASE), vsid);
 
 	/* Order update */
 	asm volatile("sync":::"memory");
+
+	/* Set ASR */
+	stabreal = get_paca()->stab_real | 0x1ul;
+
+#ifdef CONFIG_PPC_ISERIES
+	if (firmware_has_feature(FW_FEATURE_ISERIES)) {
+		HvCall1(HvCallBaseSetASR, stabreal);
+		return;
+	}
+#endif /* CONFIG_PPC_ISERIES */
+#ifdef CONFIG_PPC_PSERIES
+	if (platform_is_lpar()) {
+		plpar_hcall_norets(H_SET_ASR, stabreal);
+		return;
+	}
+#endif
+	mtspr(SPRN_ASR, stabreal);
 }

arch/powerpc/oprofile/op_model_power4.c

@@ -233,8 +233,7 @@ static unsigned long get_pc(struct pt_regs *regs)
 	mmcra = mfspr(SPRN_MMCRA);
 
 	/* Were we in the hypervisor? */
-	if ((systemcfg->platform == PLATFORM_PSERIES_LPAR) &&
-	    (mmcra & MMCRA_SIHV))
+	if (platform_is_lpar() && (mmcra & MMCRA_SIHV))
 		/* function descriptor madness */
 		return *((unsigned long *)hypervisor_bucket);
 

arch/powerpc/platforms/iseries/setup.c

@@ -39,6 +39,7 @@
 #include <asm/sections.h>
 #include <asm/iommu.h>
 #include <asm/firmware.h>
+#include <asm/systemcfg.h>
 
 #include <asm/time.h>
 #include <asm/paca.h>
@@ -71,7 +72,7 @@ extern void hvlog(char *fmt, ...);
 #endif
 
 /* Function Prototypes */
-static void build_iSeries_Memory_Map(void);
+static unsigned long build_iSeries_Memory_Map(void);
 static void iseries_shared_idle(void);
 static void iseries_dedicated_idle(void);
 #ifdef CONFIG_PCI
@@ -403,9 +404,11 @@ void mschunks_alloc(unsigned long num_chunks)
  * a table used to translate Linux's physical addresses to these
  * absolute addresses.  Absolute addresses are needed when
  * communicating with the hypervisor (e.g. to build HPT entries)
+ *
+ * Returns the physical memory size
  */
 
-static void __init build_iSeries_Memory_Map(void)
+static unsigned long __init build_iSeries_Memory_Map(void)
 {
 	u32 loadAreaFirstChunk, loadAreaLastChunk, loadAreaSize;
 	u32 nextPhysChunk;
@@ -538,7 +541,7 @@ static void __init build_iSeries_Memory_Map(void)
 	 * which should be equal to
 	 *   nextPhysChunk
 	 */
-	systemcfg->physicalMemorySize = chunk_to_addr(nextPhysChunk);
+	return chunk_to_addr(nextPhysChunk);
 }
 
 /*
@@ -564,8 +567,8 @@ static void __init iSeries_setup_arch(void)
 	printk("Max physical processors = %d\n",
 			itVpdAreas.xSlicMaxPhysicalProcs);
 
-	systemcfg->processor = xIoHriProcessorVpd[procIx].xPVR;
-	printk("Processor version = %x\n", systemcfg->processor);
+	_systemcfg->processor = xIoHriProcessorVpd[procIx].xPVR;
+	printk("Processor version = %x\n", _systemcfg->processor);
 }
 
 static void iSeries_show_cpuinfo(struct seq_file *m)
@@ -929,7 +932,7 @@ void dt_cpus(struct iseries_flat_dt *dt)
 	dt_end_node(dt);
 }
 
-void build_flat_dt(struct iseries_flat_dt *dt)
+void build_flat_dt(struct iseries_flat_dt *dt, unsigned long phys_mem_size)
 {
 	u64 tmp[2];
 
@@ -945,7 +948,7 @@ void build_flat_dt(struct iseries_flat_dt *dt)
 	dt_prop_str(dt, "name", "memory");
 	dt_prop_str(dt, "device_type", "memory");
 	tmp[0] = 0;
-	tmp[1] = systemcfg->physicalMemorySize;
+	tmp[1] = phys_mem_size;
 	dt_prop_u64_list(dt, "reg", tmp, 2);
 	dt_end_node(dt);
 
@@ -965,13 +968,15 @@ void build_flat_dt(struct iseries_flat_dt *dt)
 
 void * __init iSeries_early_setup(void)
 {
+	unsigned long phys_mem_size;
+
 	iSeries_fixup_klimit();
 
 	/*
 	 * Initialize the table which translate Linux physical addresses to
 	 * AS/400 absolute addresses
 	 */
-	build_iSeries_Memory_Map();
+	phys_mem_size = build_iSeries_Memory_Map();
 
 	iSeries_get_cmdline();
 
@@ -981,7 +986,7 @@ void * __init iSeries_early_setup(void)
 	/* Parse early parameters, in particular mem=x */
 	parse_early_param();
 
-	build_flat_dt(&iseries_dt);
+	build_flat_dt(&iseries_dt, phys_mem_size);
 
 	return (void *) __pa(&iseries_dt);
 }

arch/powerpc/platforms/pseries/eeh.c

@@ -32,7 +32,6 @@
 #include <asm/machdep.h>
 #include <asm/ppc-pci.h>
 #include <asm/rtas.h>
-#include <asm/systemcfg.h>
 
 #undef DEBUG
 
@@ -1186,7 +1185,7 @@ static int __init eeh_init_proc(void)
 {
 	struct proc_dir_entry *e;
 
-	if (systemcfg->platform & PLATFORM_PSERIES) {
+	if (platform_is_pseries()) {
 		e = create_proc_entry("ppc64/eeh", 0, NULL);
 		if (e)
 			e->proc_fops = &proc_eeh_operations;

arch/powerpc/platforms/pseries/iommu.c

@@ -42,7 +42,6 @@
 #include <asm/machdep.h>
 #include <asm/abs_addr.h>
 #include <asm/pSeries_reconfig.h>
-#include <asm/systemcfg.h>
 #include <asm/firmware.h>
 #include <asm/tce.h>
 #include <asm/ppc-pci.h>
@@ -582,7 +581,7 @@ void iommu_init_early_pSeries(void)
 		return;
 	}
 
-	if (systemcfg->platform & PLATFORM_LPAR) {
+	if (platform_is_lpar()) {
 		if (firmware_has_feature(FW_FEATURE_MULTITCE)) {
 			ppc_md.tce_build = tce_buildmulti_pSeriesLP;
 			ppc_md.tce_free	 = tce_freemulti_pSeriesLP;

arch/powerpc/platforms/pseries/pci.c

@@ -123,7 +123,7 @@ static void fixup_winbond_82c105(struct pci_dev* dev)
 	int i;
 	unsigned int reg;
 
-	if (!(systemcfg->platform & PLATFORM_PSERIES))
+	if (!platform_is_pseries())
 		return;
 
 	printk("Using INTC for W82c105 IDE controller.\n");

arch/powerpc/platforms/pseries/reconfig.c

@@ -408,7 +408,7 @@ static int proc_ppc64_create_ofdt(void)
 {
 	struct proc_dir_entry *ent;
 
-	if (!(systemcfg->platform & PLATFORM_PSERIES))
+	if (!platform_is_pseries())
 		return 0;
 
 	ent = create_proc_entry("ppc64/ofdt", S_IWUSR, NULL);

arch/powerpc/platforms/pseries/rtasd.c

@@ -482,10 +482,12 @@ static int __init rtas_init(void)
 {
 	struct proc_dir_entry *entry;
 
-	/* No RTAS, only warn if we are on a pSeries box  */
+	if (!platform_is_pseries())
+		return 0;
+
+	/* No RTAS */
 	if (rtas_token("event-scan") == RTAS_UNKNOWN_SERVICE) {
-		if (systemcfg->platform & PLATFORM_PSERIES)
-			printk(KERN_INFO "rtasd: no event-scan on system\n");
+		printk(KERN_INFO "rtasd: no event-scan on system\n");
 		return 1;
 	}
 

arch/powerpc/platforms/pseries/setup.c

@@ -249,7 +249,7 @@ static void __init pSeries_setup_arch(void)
 		ppc_md.idle_loop = default_idle;
 	}
 
-	if (systemcfg->platform & PLATFORM_LPAR)
+	if (platform_is_lpar())
 		ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
 	else
 		ppc_md.enable_pmcs = power4_enable_pmcs;
@@ -378,7 +378,7 @@ static void __init pSeries_init_early(void)
 
 	fw_feature_init();
 	
-	if (systemcfg->platform & PLATFORM_LPAR)
+	if (platform_is_lpar())
 		hpte_init_lpar();
 	else {
 		hpte_init_native();
@@ -388,7 +388,7 @@ static void __init pSeries_init_early(void)
 
 	generic_find_legacy_serial_ports(&physport, &default_speed);
 
-	if (systemcfg->platform & PLATFORM_LPAR)
+	if (platform_is_lpar())
 		find_udbg_vterm();
 	else if (physport) {
 		/* Map the uart for udbg. */
@@ -592,7 +592,7 @@ static void pseries_shared_idle(void)
 
 static int pSeries_pci_probe_mode(struct pci_bus *bus)
 {
-	if (systemcfg->platform & PLATFORM_LPAR)
+	if (platform_is_lpar())
 		return PCI_PROBE_DEVTREE;
 	return PCI_PROBE_NORMAL;
 }

arch/powerpc/platforms/pseries/smp.c

@@ -46,6 +46,7 @@
 #include <asm/rtas.h>
 #include <asm/pSeries_reconfig.h>
 #include <asm/mpic.h>
+#include <asm/systemcfg.h>
 
 #include "plpar_wrappers.h"
 
@@ -96,7 +97,7 @@ int pSeries_cpu_disable(void)
 	int cpu = smp_processor_id();
 
 	cpu_clear(cpu, cpu_online_map);
-	systemcfg->processorCount--;
+	_systemcfg->processorCount--;
 
 	/*fix boot_cpuid here*/
 	if (cpu == boot_cpuid)
@@ -441,7 +442,7 @@ void __init smp_init_pSeries(void)
 	smp_ops->cpu_die = pSeries_cpu_die;
 
 	/* Processors can be added/removed only on LPAR */
-	if (systemcfg->platform == PLATFORM_PSERIES_LPAR)
+	if (platform_is_lpar())
 		pSeries_reconfig_notifier_register(&pSeries_smp_nb);
 #endif
 

arch/powerpc/platforms/pseries/xics.c

@@ -545,7 +545,9 @@ nextnode:
 		of_node_put(np);
 	}
 
-	if (systemcfg->platform == PLATFORM_PSERIES) {
+	if (platform_is_lpar())
+		ops = &pSeriesLP_ops;
+	else {
 #ifdef CONFIG_SMP
 		for_each_cpu(i) {
 			int hard_id;
@@ -561,8 +563,6 @@ nextnode:
 #else
 		xics_per_cpu[0] = ioremap(intr_base, intr_size);
 #endif /* CONFIG_SMP */
-	} else if (systemcfg->platform == PLATFORM_PSERIES_LPAR) {
-		ops = &pSeriesLP_ops;
 	}
 
 	xics_8259_pic.enable = i8259_pic.enable;

arch/ppc/kernel/ppc_ksyms.c

@@ -217,9 +217,6 @@ EXPORT_SYMBOL(adb_try_handler_change);
 EXPORT_SYMBOL(cuda_request);
 EXPORT_SYMBOL(cuda_poll);
 #endif /* CONFIG_ADB_CUDA */
-#ifdef CONFIG_PPC_MULTIPLATFORM
-EXPORT_SYMBOL(_machine);
-#endif
 #ifdef CONFIG_PPC_PMAC
 EXPORT_SYMBOL(sys_ctrler);
 EXPORT_SYMBOL(pmac_newworld);

arch/ppc/kernel/setup.c

@@ -76,6 +76,7 @@ unsigned int DMA_MODE_WRITE;
 
 #ifdef CONFIG_PPC_MULTIPLATFORM
 int _machine = 0;
+EXPORT_SYMBOL(_machine);
 
 extern void prep_init(unsigned long r3, unsigned long r4,
 		unsigned long r5, unsigned long r6, unsigned long r7);

arch/ppc64/kernel/asm-offsets.c

@@ -74,7 +74,6 @@ 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 */

arch/ppc64/kernel/head.S

@@ -28,7 +28,6 @@
 #include <asm/processor.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>
@@ -1701,21 +1700,9 @@ _GLOBAL(__secondary_start)
 	HMT_MEDIUM			/* Set thread priority to MEDIUM */
 
 	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 */
+	bl	.early_setup_secondary
 
 	/* Initialize the kernel stack.  Just a repeat for iSeries.	 */
 	LOADADDR(r3,current_set)
@@ -1724,37 +1711,6 @@ 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
 	li	r7,0
 	mtlr	r7
 
@@ -1896,40 +1852,6 @@ _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 */
-	sub	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

arch/ppc64/kernel/idle.c

@@ -26,7 +26,6 @@
 #include <asm/processor.h>
 #include <asm/cputable.h>
 #include <asm/time.h>
-#include <asm/systemcfg.h>
 #include <asm/machdep.h>
 #include <asm/smp.h>
 

arch/ppc64/kernel/lparcfg.c

@@ -35,6 +35,7 @@
 #include <asm/time.h>
 #include <asm/iseries/it_exp_vpd_panel.h>
 #include <asm/prom.h>
+#include <asm/systemcfg.h>
 
 #define MODULE_VERS "1.6"
 #define MODULE_NAME "lparcfg"
@@ -371,7 +372,7 @@ static int lparcfg_data(struct seq_file *m, void *v)
 	lrdrp = (int *)get_property(rtas_node, "ibm,lrdr-capacity", NULL);
 
 	if (lrdrp == NULL) {
-		partition_potential_processors = systemcfg->processorCount;
+		partition_potential_processors = _systemcfg->processorCount;
 	} else {
 		partition_potential_processors = *(lrdrp + 4);
 	}

arch/ppc64/kernel/nvram.c

@@ -31,7 +31,6 @@
 #include <asm/rtas.h>
 #include <asm/prom.h>
 #include <asm/machdep.h>
-#include <asm/systemcfg.h>
 
 #undef DEBUG_NVRAM
 
@@ -167,7 +166,7 @@ static int dev_nvram_ioctl(struct inode *inode, struct file *file,
 	case IOC_NVRAM_GET_OFFSET: {
 		int part, offset;
 
-		if (systemcfg->platform != PLATFORM_POWERMAC)
+		if (_machine != PLATFORM_POWERMAC)
 			return -EINVAL;
 		if (copy_from_user(&part, (void __user*)arg, sizeof(part)) != 0)
 			return -EFAULT;
@@ -450,7 +449,7 @@ static int nvram_setup_partition(void)
 	 * in our nvram, as Apple defined partitions use pretty much
 	 * all of the space
 	 */
-	if (systemcfg->platform == PLATFORM_POWERMAC)
+	if (_machine == PLATFORM_POWERMAC)
 		return -ENOSPC;
 
 	/* see if we have an OS partition that meets our needs.

arch/ppc64/kernel/pci.c

@@ -1277,12 +1277,9 @@ long sys_pciconfig_iobase(long which, unsigned long in_bus,
 	 * G5 machines... So when something asks for bus 0 io base
 	 * (bus 0 is HT root), we return the AGP one instead.
 	 */
-#ifdef CONFIG_PPC_PMAC
-	if (systemcfg->platform == PLATFORM_POWERMAC &&
-	    machine_is_compatible("MacRISC4"))
+	if (machine_is_compatible("MacRISC4"))
 		if (in_bus == 0)
 			in_bus = 0xf0;
-#endif /* CONFIG_PPC_PMAC */
 
 	/* That syscall isn't quite compatible with PCI domains, but it's
 	 * used on pre-domains setup. We return the first match

arch/ppc64/kernel/proc_ppc64.c

@@ -53,7 +53,7 @@ static int __init proc_ppc64_create(void)
 	if (!root)
 		return 1;
 
-	if (!(systemcfg->platform & (PLATFORM_PSERIES | PLATFORM_CELL)))
+	if (!(platform_is_pseries() || _machine == PLATFORM_CELL))
 		return 0;
 
 	if (!proc_mkdir("rtas", root))
@@ -74,7 +74,7 @@ static int __init proc_ppc64_init(void)
 	if (!pde)
 		return 1;
 	pde->nlink = 1;
-	pde->data = systemcfg;
+	pde->data = _systemcfg;
 	pde->size = PAGE_SIZE;
 	pde->proc_fops = &page_map_fops;
 

arch/ppc64/kernel/prom.c

@@ -318,7 +318,7 @@ static int __devinit finish_node_interrupts(struct device_node *np,
 		}
 
 		/* 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;
@@ -1065,7 +1065,7 @@ 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;
-	systemcfg->platform = *prop;
+	_machine = *prop;
 
 	/* check if iommu is forced on or off */
 	if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL)
@@ -1230,11 +1230,8 @@ 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();
-	systemcfg->physicalMemorySize = lmb_phys_mem_size();
 	lmb_reserve(0, __pa(klimit));
 
-	DBG("Phys. mem: %lx\n", systemcfg->physicalMemorySize);
-
 	/* Reserve LMB regions used by kernel, initrd, dt, etc... */
 	early_reserve_mem();
 
@@ -1753,7 +1750,7 @@ 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 */

arch/ppc64/kernel/prom_init.c

@@ -1934,7 +1934,8 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, unsigned long
 	/*
 	 * 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();
 
 	/*

arch/ppc64/kernel/vdso.c

@@ -34,6 +34,7 @@
 #include <asm/machdep.h>
 #include <asm/cputable.h>
 #include <asm/sections.h>
+#include <asm/systemcfg.h>
 #include <asm/vdso.h>
 
 #undef DEBUG
@@ -179,7 +180,7 @@ static struct page * vdso_vma_nopage(struct vm_area_struct * vma,
 	 * Last page is systemcfg.
 	 */
 	if ((vma->vm_end - address) <= PAGE_SIZE)
-		pg = virt_to_page(systemcfg);
+		pg = virt_to_page(_systemcfg);
 	else
 		pg = virt_to_page(vbase + offset);
 
@@ -604,7 +605,7 @@ void __init vdso_init(void)
 		get_page(pg);
 	}
 
-	get_page(virt_to_page(systemcfg));
+	get_page(virt_to_page(_systemcfg));
 }
 
 int in_gate_area_no_task(unsigned long addr)

include/asm-powerpc/firmware.h

@@ -43,6 +43,7 @@
 #define FW_FEATURE_ISERIES	(1UL<<21)
 
 enum {
+#ifdef CONFIG_PPC64
 	FW_FEATURE_PSERIES_POSSIBLE = FW_FEATURE_PFT | FW_FEATURE_TCE |
 		FW_FEATURE_SPRG0 | FW_FEATURE_DABR | FW_FEATURE_COPY |
 		FW_FEATURE_ASR | FW_FEATURE_DEBUG | FW_FEATURE_TERM |
@@ -70,6 +71,11 @@ enum {
 		FW_FEATURE_ISERIES_ALWAYS &
 #endif
 		FW_FEATURE_POSSIBLE,
+
+#else /* CONFIG_PPC64 */
+	FW_FEATURE_POSSIBLE = 0,
+	FW_FEATURE_ALWAYS = 0,
+#endif
 };
 
 /* This is used to identify firmware features which are available

include/asm-powerpc/processor.h

@@ -17,65 +17,74 @@
 #include <linux/compiler.h>
 #include <asm/ptrace.h>
 #include <asm/types.h>
-#ifdef CONFIG_PPC64
-#include <asm/systemcfg.h>
-#endif
 
-#ifdef CONFIG_PPC32
-/* 32-bit platform types */
-/* We only need to define a new _MACH_xxx for machines which are part of
- * a configuration which supports more than one type of different machine.
- * This is currently limited to CONFIG_PPC_MULTIPLATFORM and CHRP/PReP/PMac.
- * -- Tom
+/* We do _not_ want to define new machine types at all, those must die
+ * in favor of using the device-tree
+ * -- BenH.
  */
-#define _MACH_prep	0x00000001
-#define _MACH_Pmac	0x00000002	/* pmac or pmac clone (non-chrp) */
-#define _MACH_chrp	0x00000004	/* chrp machine */
 
-/* see residual.h for these */
+/* Platforms codes (to be obsoleted) */
+#define PLATFORM_PSERIES	0x0100
+#define PLATFORM_PSERIES_LPAR	0x0101
+#define PLATFORM_ISERIES_LPAR	0x0201
+#define PLATFORM_LPAR		0x0001
+#define PLATFORM_POWERMAC	0x0400
+#define PLATFORM_MAPLE		0x0500
+#define PLATFORM_PREP		0x0600
+#define PLATFORM_CHRP		0x0700
+#define PLATFORM_CELL		0x1000
+
+/* Compat platform codes for 32 bits */
+#define _MACH_prep	PLATFORM_PREP
+#define _MACH_Pmac	PLATFORM_POWERMAC
+#define _MACH_chrp	PLATFORM_CHRP
+
+/* PREP sub-platform types see residual.h for these */
 #define _PREP_Motorola	0x01	/* motorola prep */
 #define _PREP_Firm	0x02	/* firmworks prep */
 #define _PREP_IBM	0x00	/* ibm prep */
 #define _PREP_Bull	0x03	/* bull prep */
 
-/* these are arbitrary */
+/* CHRP sub-platform types. These are arbitrary */
 #define _CHRP_Motorola	0x04	/* motorola chrp, the cobra */
 #define _CHRP_IBM	0x05	/* IBM chrp, the longtrail and longtrail 2 */
 #define _CHRP_Pegasos	0x06	/* Genesi/bplan's Pegasos and Pegasos2 */
 
-#ifdef CONFIG_PPC_MULTIPLATFORM
+#define platform_is_pseries()	(_machine == PLATFORM_PSERIES || \
+				 _machine == PLATFORM_PSERIES_LPAR)
+#define platform_is_lpar()	(!!(_machine & PLATFORM_LPAR))
+
+#if defined(CONFIG_PPC_MULTIPLATFORM)
 extern int _machine;
 
+#ifdef CONFIG_PPC32
+
 /* what kind of prep workstation we are */
 extern int _prep_type;
 extern int _chrp_type;
 
 /*
  * This is used to identify the board type from a given PReP board
- * vendor. Board revision is also made available.
+ * vendor. Board revision is also made available. This will be moved
+ * elsewhere soon
  */
 extern unsigned char ucSystemType;
 extern unsigned char ucBoardRev;
 extern unsigned char ucBoardRevMaj, ucBoardRevMin;
+
+#endif /* CONFIG_PPC32 */
+
+#elif defined(CONFIG_PPC_ISERIES)
+/*
+ * iSeries is soon to become MULTIPLATFORM hopefully ...
+ */
+#define _machine CONFIG_PPC_ISERIES_LPAR
 #else
 #define _machine 0
 #endif /* CONFIG_PPC_MULTIPLATFORM */
-#endif /* CONFIG_PPC32 */
 
-#ifdef CONFIG_PPC64
-/* Platforms supported by PPC64 */
-#define PLATFORM_PSERIES      0x0100
-#define PLATFORM_PSERIES_LPAR 0x0101
-#define PLATFORM_ISERIES_LPAR 0x0201
-#define PLATFORM_LPAR         0x0001
-#define PLATFORM_POWERMAC     0x0400
-#define PLATFORM_MAPLE        0x0500
-#define PLATFORM_CELL         0x1000
-
-/* Compatibility with drivers coming from PPC32 world */
-#define _machine	(systemcfg->platform)
-#define _MACH_Pmac	PLATFORM_POWERMAC
-#endif
+
+
 
 /*
  * Default implementation of macro that returns current

include/asm-powerpc/reg.h

@@ -363,6 +363,7 @@
 #define SPRN_RPA	0x3D6	/* Required Physical Address Register */
 #define SPRN_SDA	0x3BF	/* Sampled Data Address Register */
 #define SPRN_SDR1	0x019	/* MMU Hash Base Register */
+#define SPRN_ASR	0x118   /* Address Space Register */
 #define SPRN_SIA	0x3BB	/* Sampled Instruction Address Register */
 #define SPRN_SPRG0	0x110	/* Special Purpose Register General 0 */
 #define SPRN_SPRG1	0x111	/* Special Purpose Register General 1 */

include/asm-ppc64/systemcfg.h → include/asm-powerpc/systemcfg.h

@@ -1,7 +1,7 @@
 #ifndef _SYSTEMCFG_H
 #define _SYSTEMCFG_H
 
-/* 
+/*
  * Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
  *
  * This program is free software; you can redistribute it and/or
@@ -12,7 +12,7 @@
 
 /* Change Activity:
  * 2002/09/30 : bergner  : Created
- * End Change Activity 
+ * End Change Activity
  */
 
 /*
@@ -56,7 +56,7 @@ struct systemcfg {
 };
 
 #ifdef __KERNEL__
-extern struct systemcfg *systemcfg;
+extern struct systemcfg *_systemcfg; /* to be renamed */
 #endif
 
 #endif /* __ASSEMBLY__ */

include/asm-ppc64/mmu.h

@@ -224,6 +224,8 @@ extern int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
 			     unsigned long pstart, unsigned long mode,
 			     int psize);
 
+extern void htab_initialize(void);
+extern void htab_initialize_secondary(void);
 extern void hpte_init_native(void);
 extern void hpte_init_lpar(void);
 extern void hpte_init_iSeries(void);
@@ -245,6 +247,7 @@ extern long iSeries_hpte_insert(unsigned long hpte_group,
 
 extern void stabs_alloc(void);
 extern void slb_initialize(void);
+extern void stab_initialize(unsigned long stab);
 
 #endif /* __ASSEMBLY__ */