[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>

10 files changed, 18 insertions, 102 deletions

diff --git a/arch/ppc64/kernel/asm-offsets.c b/arch/ppc64/kernel/asm-offsets.c
index bce9065..84ab5c1 100644
--- a/arch/ppc64/kernel/asm-offsets.c
+++ b/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 */
diff --git a/arch/ppc64/kernel/head.S b/arch/ppc64/kernel/head.S
index 9e8050e..1c869ea 100644
--- a/arch/ppc64/kernel/head.S
+++ b/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
diff --git a/arch/ppc64/kernel/idle.c b/arch/ppc64/kernel/idle.c
index 715bc0e..b879d30 100644
--- a/arch/ppc64/kernel/idle.c
+++ b/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>
 
diff --git a/arch/ppc64/kernel/lparcfg.c b/arch/ppc64/kernel/lparcfg.c
index 3e7b2f2..a80ed30 100644
--- a/arch/ppc64/kernel/lparcfg.c
+++ b/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);
 	}
diff --git a/arch/ppc64/kernel/nvram.c b/arch/ppc64/kernel/nvram.c
index 4fb1a9f..c0fcd29 100644
--- a/arch/ppc64/kernel/nvram.c
+++ b/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.
diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c
index 30247ff..66698fd 100644
--- a/arch/ppc64/kernel/pci.c
+++ b/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
diff --git a/arch/ppc64/kernel/proc_ppc64.c b/arch/ppc64/kernel/proc_ppc64.c
index 24e955e..c893a11 100644
--- a/arch/ppc64/kernel/proc_ppc64.c
+++ b/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;
 
diff --git a/arch/ppc64/kernel/prom.c b/arch/ppc64/kernel/prom.c
index 3402fbe..fbad2c3 100644
--- a/arch/ppc64/kernel/prom.c
+++ b/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 */
diff --git a/arch/ppc64/kernel/prom_init.c b/arch/ppc64/kernel/prom_init.c
index e4c880da..6375f40 100644
--- a/arch/ppc64/kernel/prom_init.c
+++ b/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();
 
 	/*
diff --git a/arch/ppc64/kernel/vdso.c b/arch/ppc64/kernel/vdso.c
index 4aacf52..1bbacac 100644
--- a/arch/ppc64/kernel/vdso.c
+++ b/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)