Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 877 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/iSeries_setup.c b/arch/ppc64/kernel/iSeries_setup.c
new file mode 100644
index 00000000000..da20120f226
--- /dev/null
+++ b/arch/ppc64/kernel/iSeries_setup.c
@@ -0,0 +1,877 @@
+/*
+ *    Copyright (c) 2000 Mike Corrigan <mikejc@us.ibm.com>
+ *    Copyright (c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
+ *
+ *    Module name: iSeries_setup.c
+ *
+ *    Description:
+ *      Architecture- / platform-specific boot-time initialization code for
+ *      the IBM iSeries LPAR.  Adapted from original code by Grant Erickson and
+ *      code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
+ *      <dan@net4x.com>.
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/threads.h>
+#include <linux/smp.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/bootmem.h>
+#include <linux/initrd.h>
+#include <linux/seq_file.h>
+#include <linux/kdev_t.h>
+#include <linux/major.h>
+#include <linux/root_dev.h>
+
+#include <asm/processor.h>
+#include <asm/machdep.h>
+#include <asm/page.h>
+#include <asm/mmu.h>
+#include <asm/pgtable.h>
+#include <asm/mmu_context.h>
+#include <asm/cputable.h>
+#include <asm/sections.h>
+#include <asm/iommu.h>
+
+#include <asm/time.h>
+#include "iSeries_setup.h"
+#include <asm/naca.h>
+#include <asm/paca.h>
+#include <asm/cache.h>
+#include <asm/sections.h>
+#include <asm/iSeries/LparData.h>
+#include <asm/iSeries/HvCallHpt.h>
+#include <asm/iSeries/HvLpConfig.h>
+#include <asm/iSeries/HvCallEvent.h>
+#include <asm/iSeries/HvCallSm.h>
+#include <asm/iSeries/HvCallXm.h>
+#include <asm/iSeries/ItLpQueue.h>
+#include <asm/iSeries/IoHriMainStore.h>
+#include <asm/iSeries/iSeries_proc.h>
+#include <asm/iSeries/mf.h>
+#include <asm/iSeries/HvLpEvent.h>
+#include <asm/iSeries/iSeries_irq.h>
+
+extern void hvlog(char *fmt, ...);
+
+#ifdef DEBUG
+#define DBG(fmt...) hvlog(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+/* Function Prototypes */
+extern void ppcdbg_initialize(void);
+
+static void build_iSeries_Memory_Map(void);
+static void setup_iSeries_cache_sizes(void);
+static void iSeries_bolt_kernel(unsigned long saddr, unsigned long eaddr);
+extern void iSeries_pci_final_fixup(void);
+
+/* Global Variables */
+static unsigned long procFreqHz;
+static unsigned long procFreqMhz;
+static unsigned long procFreqMhzHundreths;
+
+static unsigned long tbFreqHz;
+static unsigned long tbFreqMhz;
+static unsigned long tbFreqMhzHundreths;
+
+int piranha_simulator;
+
+extern int rd_size;		/* Defined in drivers/block/rd.c */
+extern unsigned long klimit;
+extern unsigned long embedded_sysmap_start;
+extern unsigned long embedded_sysmap_end;
+
+extern unsigned long iSeries_recal_tb;
+extern unsigned long iSeries_recal_titan;
+
+static int mf_initialized;
+
+struct MemoryBlock {
+	unsigned long absStart;
+	unsigned long absEnd;
+	unsigned long logicalStart;
+	unsigned long logicalEnd;
+};
+
+/*
+ * Process the main store vpd to determine where the holes in memory are
+ * and return the number of physical blocks and fill in the array of
+ * block data.
+ */
+static unsigned long iSeries_process_Condor_mainstore_vpd(
+		struct MemoryBlock *mb_array, unsigned long max_entries)
+{
+	unsigned long holeFirstChunk, holeSizeChunks;
+	unsigned long numMemoryBlocks = 1;
+	struct IoHriMainStoreSegment4 *msVpd =
+		(struct IoHriMainStoreSegment4 *)xMsVpd;
+	unsigned long holeStart = msVpd->nonInterleavedBlocksStartAdr;
+	unsigned long holeEnd = msVpd->nonInterleavedBlocksEndAdr;
+	unsigned long holeSize = holeEnd - holeStart;
+
+	printk("Mainstore_VPD: Condor\n");
+	/*
+	 * Determine if absolute memory has any
+	 * holes so that we can interpret the
+	 * access map we get back from the hypervisor
+	 * correctly.
+	 */
+	mb_array[0].logicalStart = 0;
+	mb_array[0].logicalEnd = 0x100000000;
+	mb_array[0].absStart = 0;
+	mb_array[0].absEnd = 0x100000000;
+
+	if (holeSize) {
+		numMemoryBlocks = 2;
+		holeStart = holeStart & 0x000fffffffffffff;
+		holeStart = addr_to_chunk(holeStart);
+		holeFirstChunk = holeStart;
+		holeSize = addr_to_chunk(holeSize);
+		holeSizeChunks = holeSize;
+		printk( "Main store hole: start chunk = %0lx, size = %0lx chunks\n",
+				holeFirstChunk, holeSizeChunks );
+		mb_array[0].logicalEnd = holeFirstChunk;
+		mb_array[0].absEnd = holeFirstChunk;
+		mb_array[1].logicalStart = holeFirstChunk;
+		mb_array[1].logicalEnd = 0x100000000 - holeSizeChunks;
+		mb_array[1].absStart = holeFirstChunk + holeSizeChunks;
+		mb_array[1].absEnd = 0x100000000;
+	}
+	return numMemoryBlocks;
+}
+
+#define MaxSegmentAreas			32
+#define MaxSegmentAdrRangeBlocks	128
+#define MaxAreaRangeBlocks		4
+
+static unsigned long iSeries_process_Regatta_mainstore_vpd(
+		struct MemoryBlock *mb_array, unsigned long max_entries)
+{
+	struct IoHriMainStoreSegment5 *msVpdP =
+		(struct IoHriMainStoreSegment5 *)xMsVpd;
+	unsigned long numSegmentBlocks = 0;
+	u32 existsBits = msVpdP->msAreaExists;
+	unsigned long area_num;
+
+	printk("Mainstore_VPD: Regatta\n");
+
+	for (area_num = 0; area_num < MaxSegmentAreas; ++area_num ) {
+		unsigned long numAreaBlocks;
+		struct IoHriMainStoreArea4 *currentArea;
+
+		if (existsBits & 0x80000000) {
+			unsigned long block_num;
+
+			currentArea = &msVpdP->msAreaArray[area_num];
+			numAreaBlocks = currentArea->numAdrRangeBlocks;
+			printk("ms_vpd: processing area %2ld  blocks=%ld",
+					area_num, numAreaBlocks);
+			for (block_num = 0; block_num < numAreaBlocks;
+					++block_num ) {
+				/* Process an address range block */
+				struct MemoryBlock tempBlock;
+				unsigned long i;
+
+				tempBlock.absStart =
+					(unsigned long)currentArea->xAdrRangeBlock[block_num].blockStart;
+				tempBlock.absEnd =
+					(unsigned long)currentArea->xAdrRangeBlock[block_num].blockEnd;
+				tempBlock.logicalStart = 0;
+				tempBlock.logicalEnd   = 0;
+				printk("\n          block %ld absStart=%016lx absEnd=%016lx",
+						block_num, tempBlock.absStart,
+						tempBlock.absEnd);
+
+				for (i = 0; i < numSegmentBlocks; ++i) {
+					if (mb_array[i].absStart ==
+							tempBlock.absStart)
+						break;
+				}
+				if (i == numSegmentBlocks) {
+					if (numSegmentBlocks == max_entries)
+						panic("iSeries_process_mainstore_vpd: too many memory blocks");
+					mb_array[numSegmentBlocks] = tempBlock;
+					++numSegmentBlocks;
+				} else
+					printk(" (duplicate)");
+			}
+			printk("\n");
+		}
+		existsBits <<= 1;
+	}
+	/* Now sort the blocks found into ascending sequence */
+	if (numSegmentBlocks > 1) {
+		unsigned long m, n;
+
+		for (m = 0; m < numSegmentBlocks - 1; ++m) {
+			for (n = numSegmentBlocks - 1; m < n; --n) {
+				if (mb_array[n].absStart <
+						mb_array[n-1].absStart) {
+					struct MemoryBlock tempBlock;
+
+					tempBlock = mb_array[n];
+					mb_array[n] = mb_array[n-1];
+					mb_array[n-1] = tempBlock;
+				}
+			}
+		}
+	}
+	/*
+	 * Assign "logical" addresses to each block.  These
+	 * addresses correspond to the hypervisor "bitmap" space.
+	 * Convert all addresses into units of 256K chunks.
+	 */
+	{
+	unsigned long i, nextBitmapAddress;
+
+	printk("ms_vpd: %ld sorted memory blocks\n", numSegmentBlocks);
+	nextBitmapAddress = 0;
+	for (i = 0; i < numSegmentBlocks; ++i) {
+		unsigned long length = mb_array[i].absEnd -
+			mb_array[i].absStart;
+
+		mb_array[i].logicalStart = nextBitmapAddress;
+		mb_array[i].logicalEnd = nextBitmapAddress + length;
+		nextBitmapAddress += length;
+		printk("          Bitmap range: %016lx - %016lx\n"
+				"        Absolute range: %016lx - %016lx\n",
+				mb_array[i].logicalStart,
+				mb_array[i].logicalEnd,
+				mb_array[i].absStart, mb_array[i].absEnd);
+		mb_array[i].absStart = addr_to_chunk(mb_array[i].absStart &
+				0x000fffffffffffff);
+		mb_array[i].absEnd = addr_to_chunk(mb_array[i].absEnd &
+				0x000fffffffffffff);
+		mb_array[i].logicalStart =
+			addr_to_chunk(mb_array[i].logicalStart);
+		mb_array[i].logicalEnd = addr_to_chunk(mb_array[i].logicalEnd);
+	}
+	}
+
+	return numSegmentBlocks;
+}
+
+static unsigned long iSeries_process_mainstore_vpd(struct MemoryBlock *mb_array,
+		unsigned long max_entries)
+{
+	unsigned long i;
+	unsigned long mem_blocks = 0;
+
+	if (cpu_has_feature(CPU_FTR_SLB))
+		mem_blocks = iSeries_process_Regatta_mainstore_vpd(mb_array,
+				max_entries);
+	else
+		mem_blocks = iSeries_process_Condor_mainstore_vpd(mb_array,
+				max_entries);
+
+	printk("Mainstore_VPD: numMemoryBlocks = %ld \n", mem_blocks);
+	for (i = 0; i < mem_blocks; ++i) {
+		printk("Mainstore_VPD: block %3ld logical chunks %016lx - %016lx\n"
+		       "                             abs chunks %016lx - %016lx\n",
+			i, mb_array[i].logicalStart, mb_array[i].logicalEnd,
+			mb_array[i].absStart, mb_array[i].absEnd);
+	}
+	return mem_blocks;
+}
+
+static void __init iSeries_get_cmdline(void)
+{
+	char *p, *q;
+
+	/* copy the command line parameter from the primary VSP  */
+	HvCallEvent_dmaToSp(cmd_line, 2 * 64* 1024, 256,
+			HvLpDma_Direction_RemoteToLocal);
+
+	p = cmd_line;
+	q = cmd_line + 255;
+	while(p < q) {
+		if (!*p || *p == '\n')
+			break;
+		++p;
+	}
+	*p = 0;
+}
+
+static void __init iSeries_init_early(void)
+{
+	extern unsigned long memory_limit;
+
+	DBG(" -> iSeries_init_early()\n");
+
+	ppcdbg_initialize();
+
+#if defined(CONFIG_BLK_DEV_INITRD)
+	/*
+	 * If the init RAM disk has been configured and there is
+	 * a non-zero starting address for it, set it up
+	 */
+	if (naca.xRamDisk) {
+		initrd_start = (unsigned long)__va(naca.xRamDisk);
+		initrd_end = initrd_start + naca.xRamDiskSize * PAGE_SIZE;
+		initrd_below_start_ok = 1;	// ramdisk in kernel space
+		ROOT_DEV = Root_RAM0;
+		if (((rd_size * 1024) / PAGE_SIZE) < naca.xRamDiskSize)
+			rd_size = (naca.xRamDiskSize * PAGE_SIZE) / 1024;
+	} else
+#endif /* CONFIG_BLK_DEV_INITRD */
+	{
+	    /* ROOT_DEV = MKDEV(VIODASD_MAJOR, 1); */
+	}
+
+	iSeries_recal_tb = get_tb();
+	iSeries_recal_titan = HvCallXm_loadTod();
+
+	/*
+	 * Cache sizes must be initialized before hpte_init_iSeries is called
+	 * as the later need them for flush_icache_range()
+	 */
+	setup_iSeries_cache_sizes();
+
+	/*
+	 * Initialize the hash table management pointers
+	 */
+	hpte_init_iSeries();
+
+	/*
+	 * Initialize the DMA/TCE management
+	 */
+	iommu_init_early_iSeries();
+
+	/*
+	 * Initialize the table which translate Linux physical addresses to
+	 * AS/400 absolute addresses
+	 */
+	build_iSeries_Memory_Map();
+
+	iSeries_get_cmdline();
+
+	/* Save unparsed command line copy for /proc/cmdline */
+	strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
+
+	/* Parse early parameters, in particular mem=x */
+	parse_early_param();
+
+	if (memory_limit) {
+		if (memory_limit < systemcfg->physicalMemorySize)
+			systemcfg->physicalMemorySize = memory_limit;
+		else {
+			printk("Ignoring mem=%lu >= ram_top.\n", memory_limit);
+			memory_limit = 0;
+		}
+	}
+
+	/* Bolt kernel mappings for all of memory (or just a bit if we've got a limit) */
+	iSeries_bolt_kernel(0, systemcfg->physicalMemorySize);
+
+	lmb_init();
+	lmb_add(0, systemcfg->physicalMemorySize);
+	lmb_analyze();
+	lmb_reserve(0, __pa(klimit));
+
+	/* Initialize machine-dependency vectors */
+#ifdef CONFIG_SMP
+	smp_init_iSeries();
+#endif
+	if (itLpNaca.xPirEnvironMode == 0)
+		piranha_simulator = 1;
+
+	/* Associate Lp Event Queue 0 with processor 0 */
+	HvCallEvent_setLpEventQueueInterruptProc(0, 0);
+
+	mf_init();
+	mf_initialized = 1;
+	mb();
+
+	/* If we were passed an initrd, set the ROOT_DEV properly if the values
+	 * look sensible. If not, clear initrd reference.
+	 */
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
+	    initrd_end > initrd_start)
+		ROOT_DEV = Root_RAM0;
+	else
+		initrd_start = initrd_end = 0;
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+	DBG(" <- iSeries_init_early()\n");
+}
+
+/*
+ * The iSeries may have very large memories ( > 128 GB ) and a partition
+ * may get memory in "chunks" that may be anywhere in the 2**52 real
+ * address space.  The chunks are 256K in size.  To map this to the
+ * memory model Linux expects, the AS/400 specific code builds a
+ * translation table to translate what Linux thinks are "physical"
+ * addresses to the actual real addresses.  This allows us to make
+ * it appear to Linux that we have contiguous memory starting at
+ * physical address zero while in fact this could be far from the truth.
+ * To avoid confusion, I'll let the words physical and/or real address
+ * apply to the Linux addresses while I'll use "absolute address" to
+ * refer to the actual hardware real address.
+ *
+ * build_iSeries_Memory_Map gets information from the Hypervisor and
+ * looks at the Main Store VPD to determine the absolute addresses
+ * of the memory that has been assigned to our partition and builds
+ * 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)
+ */
+
+static void __init build_iSeries_Memory_Map(void)
+{
+	u32 loadAreaFirstChunk, loadAreaLastChunk, loadAreaSize;
+	u32 nextPhysChunk;
+	u32 hptFirstChunk, hptLastChunk, hptSizeChunks, hptSizePages;
+	u32 num_ptegs;
+	u32 totalChunks,moreChunks;
+	u32 currChunk, thisChunk, absChunk;
+	u32 currDword;
+	u32 chunkBit;
+	u64 map;
+	struct MemoryBlock mb[32];
+	unsigned long numMemoryBlocks, curBlock;
+
+	/* Chunk size on iSeries is 256K bytes */
+	totalChunks = (u32)HvLpConfig_getMsChunks();
+	klimit = msChunks_alloc(klimit, totalChunks, 1UL << 18);
+
+	/*
+	 * Get absolute address of our load area
+	 * and map it to physical address 0
+	 * This guarantees that the loadarea ends up at physical 0
+	 * otherwise, it might not be returned by PLIC as the first
+	 * chunks
+	 */
+
+	loadAreaFirstChunk = (u32)addr_to_chunk(itLpNaca.xLoadAreaAddr);
+	loadAreaSize =  itLpNaca.xLoadAreaChunks;
+
+	/*
+	 * Only add the pages already mapped here.
+	 * Otherwise we might add the hpt pages
+	 * The rest of the pages of the load area
+	 * aren't in the HPT yet and can still
+	 * be assigned an arbitrary physical address
+	 */
+	if ((loadAreaSize * 64) > HvPagesToMap)
+		loadAreaSize = HvPagesToMap / 64;
+
+	loadAreaLastChunk = loadAreaFirstChunk + loadAreaSize - 1;
+
+	/*
+	 * TODO Do we need to do something if the HPT is in the 64MB load area?
+	 * This would be required if the itLpNaca.xLoadAreaChunks includes
+	 * the HPT size
+	 */
+
+	printk("Mapping load area - physical addr = 0000000000000000\n"
+		"                    absolute addr = %016lx\n",
+		chunk_to_addr(loadAreaFirstChunk));
+	printk("Load area size %dK\n", loadAreaSize * 256);
+
+	for (nextPhysChunk = 0; nextPhysChunk < loadAreaSize; ++nextPhysChunk)
+		msChunks.abs[nextPhysChunk] =
+			loadAreaFirstChunk + nextPhysChunk;
+
+	/*
+	 * Get absolute address of our HPT and remember it so
+	 * we won't map it to any physical address
+	 */
+	hptFirstChunk = (u32)addr_to_chunk(HvCallHpt_getHptAddress());
+	hptSizePages = (u32)HvCallHpt_getHptPages();
+	hptSizeChunks = hptSizePages >> (msChunks.chunk_shift - PAGE_SHIFT);
+	hptLastChunk = hptFirstChunk + hptSizeChunks - 1;
+
+	printk("HPT absolute addr = %016lx, size = %dK\n",
+			chunk_to_addr(hptFirstChunk), hptSizeChunks * 256);
+
+	/* Fill in the hashed page table hash mask */
+	num_ptegs = hptSizePages *
+		(PAGE_SIZE / (sizeof(HPTE) * HPTES_PER_GROUP));
+	htab_hash_mask = num_ptegs - 1;
+
+	/*
+	 * The actual hashed page table is in the hypervisor,
+	 * we have no direct access
+	 */
+	htab_address = NULL;
+
+	/*
+	 * Determine if absolute memory has any
+	 * holes so that we can interpret the
+	 * access map we get back from the hypervisor
+	 * correctly.
+	 */
+	numMemoryBlocks = iSeries_process_mainstore_vpd(mb, 32);
+
+	/*
+	 * Process the main store access map from the hypervisor
+	 * to build up our physical -> absolute translation table
+	 */
+	curBlock = 0;
+	currChunk = 0;
+	currDword = 0;
+	moreChunks = totalChunks;
+
+	while (moreChunks) {
+		map = HvCallSm_get64BitsOfAccessMap(itLpNaca.xLpIndex,
+				currDword);
+		thisChunk = currChunk;
+		while (map) {
+			chunkBit = map >> 63;
+			map <<= 1;
+			if (chunkBit) {
+				--moreChunks;
+				while (thisChunk >= mb[curBlock].logicalEnd) {
+					++curBlock;
+					if (curBlock >= numMemoryBlocks)
+						panic("out of memory blocks");
+				}
+				if (thisChunk < mb[curBlock].logicalStart)
+					panic("memory block error");
+
+				absChunk = mb[curBlock].absStart +
+					(thisChunk - mb[curBlock].logicalStart);
+				if (((absChunk < hptFirstChunk) ||
+				     (absChunk > hptLastChunk)) &&
+				    ((absChunk < loadAreaFirstChunk) ||
+				     (absChunk > loadAreaLastChunk))) {
+					msChunks.abs[nextPhysChunk] = absChunk;
+					++nextPhysChunk;
+				}
+			}
+			++thisChunk;
+		}
+		++currDword;
+		currChunk += 64;
+	}
+
+	/*
+	 * main store size (in chunks) is
+	 *   totalChunks - hptSizeChunks
+	 * which should be equal to
+	 *   nextPhysChunk
+	 */
+	systemcfg->physicalMemorySize = chunk_to_addr(nextPhysChunk);
+}
+
+/*
+ * Set up the variables that describe the cache line sizes
+ * for this machine.
+ */
+static void __init setup_iSeries_cache_sizes(void)
+{
+	unsigned int i, n;
+	unsigned int procIx = get_paca()->lppaca.dyn_hv_phys_proc_index;
+
+	systemcfg->icache_size =
+	ppc64_caches.isize = xIoHriProcessorVpd[procIx].xInstCacheSize * 1024;
+	systemcfg->icache_line_size =
+	ppc64_caches.iline_size =
+		xIoHriProcessorVpd[procIx].xInstCacheOperandSize;
+	systemcfg->dcache_size =
+	ppc64_caches.dsize =
+		xIoHriProcessorVpd[procIx].xDataL1CacheSizeKB * 1024;
+	systemcfg->dcache_line_size =
+	ppc64_caches.dline_size =
+		xIoHriProcessorVpd[procIx].xDataCacheOperandSize;
+	ppc64_caches.ilines_per_page = PAGE_SIZE / ppc64_caches.iline_size;
+	ppc64_caches.dlines_per_page = PAGE_SIZE / ppc64_caches.dline_size;
+
+	i = ppc64_caches.iline_size;
+	n = 0;
+	while ((i = (i / 2)))
+		++n;
+	ppc64_caches.log_iline_size = n;
+
+	i = ppc64_caches.dline_size;
+	n = 0;
+	while ((i = (i / 2)))
+		++n;
+	ppc64_caches.log_dline_size = n;
+
+	printk("D-cache line size = %d\n",
+			(unsigned int)ppc64_caches.dline_size);
+	printk("I-cache line size = %d\n",
+			(unsigned int)ppc64_caches.iline_size);
+}
+
+/*
+ * Create a pte. Used during initialization only.
+ */
+static void iSeries_make_pte(unsigned long va, unsigned long pa,
+			     int mode)
+{
+	HPTE local_hpte, rhpte;
+	unsigned long hash, vpn;
+	long slot;
+
+	vpn = va >> PAGE_SHIFT;
+	hash = hpt_hash(vpn, 0);
+
+	local_hpte.dw1.dword1 = pa | mode;
+	local_hpte.dw0.dword0 = 0;
+	local_hpte.dw0.dw0.avpn = va >> 23;
+	local_hpte.dw0.dw0.bolted = 1;		/* bolted */
+	local_hpte.dw0.dw0.v = 1;
+
+	slot = HvCallHpt_findValid(&rhpte, vpn);
+	if (slot < 0) {
+		/* Must find space in primary group */
+		panic("hash_page: hpte already exists\n");
+	}
+	HvCallHpt_addValidate(slot, 0, (HPTE *)&local_hpte );
+}
+
+/*
+ * Bolt the kernel addr space into the HPT
+ */
+static void __init iSeries_bolt_kernel(unsigned long saddr, unsigned long eaddr)
+{
+	unsigned long pa;
+	unsigned long mode_rw = _PAGE_ACCESSED | _PAGE_COHERENT | PP_RWXX;
+	HPTE hpte;
+
+	for (pa = saddr; pa < eaddr ;pa += PAGE_SIZE) {
+		unsigned long ea = (unsigned long)__va(pa);
+		unsigned long vsid = get_kernel_vsid(ea);
+		unsigned long va = (vsid << 28) | (pa & 0xfffffff);
+		unsigned long vpn = va >> PAGE_SHIFT;
+		unsigned long slot = HvCallHpt_findValid(&hpte, vpn);
+
+		/* Make non-kernel text non-executable */
+		if (!in_kernel_text(ea))
+			mode_rw |= HW_NO_EXEC;
+
+		if (hpte.dw0.dw0.v) {
+			/* HPTE exists, so just bolt it */
+			HvCallHpt_setSwBits(slot, 0x10, 0);
+			/* And make sure the pp bits are correct */
+			HvCallHpt_setPp(slot, PP_RWXX);
+		} else
+			/* No HPTE exists, so create a new bolted one */
+			iSeries_make_pte(va, phys_to_abs(pa), mode_rw);
+	}
+}
+
+extern unsigned long ppc_proc_freq;
+extern unsigned long ppc_tb_freq;
+
+/*
+ * Document me.
+ */
+static void __init iSeries_setup_arch(void)
+{
+	void *eventStack;
+	unsigned procIx = get_paca()->lppaca.dyn_hv_phys_proc_index;
+
+	/* 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;
+
+	/* Setup the Lp Event Queue */
+
+	/* Allocate a page for the Event Stack
+	 * The hypervisor wants the absolute real address, so
+	 * we subtract out the KERNELBASE and add in the
+	 * absolute real address of the kernel load area
+	 */
+	eventStack = alloc_bootmem_pages(LpEventStackSize);
+	memset(eventStack, 0, LpEventStackSize);
+
+	/* Invoke the hypervisor to initialize the event stack */
+	HvCallEvent_setLpEventStack(0, eventStack, LpEventStackSize);
+
+	/* Initialize fields in our Lp Event Queue */
+	xItLpQueue.xSlicEventStackPtr = (char *)eventStack;
+	xItLpQueue.xSlicCurEventPtr = (char *)eventStack;
+	xItLpQueue.xSlicLastValidEventPtr = (char *)eventStack +
+					(LpEventStackSize - LpEventMaxSize);
+	xItLpQueue.xIndex = 0;
+
+	/* Compute processor frequency */
+	procFreqHz = ((1UL << 34) * 1000000) /
+			xIoHriProcessorVpd[procIx].xProcFreq;
+	procFreqMhz = procFreqHz / 1000000;
+	procFreqMhzHundreths = (procFreqHz / 10000) - (procFreqMhz * 100);
+	ppc_proc_freq = procFreqHz;
+
+	/* Compute time base frequency */
+	tbFreqHz = ((1UL << 32) * 1000000) /
+		xIoHriProcessorVpd[procIx].xTimeBaseFreq;
+	tbFreqMhz = tbFreqHz / 1000000;
+	tbFreqMhzHundreths = (tbFreqHz / 10000) - (tbFreqMhz * 100);
+	ppc_tb_freq = tbFreqHz;
+
+	printk("Max  logical processors = %d\n",
+			itVpdAreas.xSlicMaxLogicalProcs);
+	printk("Max physical processors = %d\n",
+			itVpdAreas.xSlicMaxPhysicalProcs);
+	printk("Processor frequency = %lu.%02lu\n", procFreqMhz,
+			procFreqMhzHundreths);
+	printk("Time base frequency = %lu.%02lu\n", tbFreqMhz,
+			tbFreqMhzHundreths);
+	systemcfg->processor = xIoHriProcessorVpd[procIx].xPVR;
+	printk("Processor version = %x\n", systemcfg->processor);
+}
+
+static void iSeries_get_cpuinfo(struct seq_file *m)
+{
+	seq_printf(m, "machine\t\t: 64-bit iSeries Logical Partition\n");
+}
+
+/*
+ * Document me.
+ * and Implement me.
+ */
+static int iSeries_get_irq(struct pt_regs *regs)
+{
+	/* -2 means ignore this interrupt */
+	return -2;
+}
+
+/*
+ * Document me.
+ */
+static void iSeries_restart(char *cmd)
+{
+	mf_reboot();
+}
+
+/*
+ * Document me.
+ */
+static void iSeries_power_off(void)
+{
+	mf_power_off();
+}
+
+/*
+ * Document me.
+ */
+static void iSeries_halt(void)
+{
+	mf_power_off();
+}
+
+extern void setup_default_decr(void);
+
+/*
+ * void __init iSeries_calibrate_decr()
+ *
+ * Description:
+ *   This routine retrieves the internal processor frequency from the VPD,
+ *   and sets up the kernel timer decrementer based on that value.
+ *
+ */
+static void __init iSeries_calibrate_decr(void)
+{
+	unsigned long	cyclesPerUsec;
+	struct div_result divres;
+
+	/* Compute decrementer (and TB) frequency in cycles/sec */
+	cyclesPerUsec = ppc_tb_freq / 1000000;
+
+	/*
+	 * Set the amount to refresh the decrementer by.  This
+	 * is the number of decrementer ticks it takes for
+	 * 1/HZ seconds.
+	 */
+	tb_ticks_per_jiffy = ppc_tb_freq / HZ;
+
+#if 0
+	/* TEST CODE FOR ADJTIME */
+	tb_ticks_per_jiffy += tb_ticks_per_jiffy / 5000;
+	/* END OF TEST CODE */
+#endif
+
+	/*
+	 * tb_ticks_per_sec = freq; would give better accuracy
+	 * but tb_ticks_per_sec = tb_ticks_per_jiffy*HZ; assures
+	 * that jiffies (and xtime) will match the time returned
+	 * by do_gettimeofday.
+	 */
+	tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
+	tb_ticks_per_usec = cyclesPerUsec;
+	tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
+	div128_by_32(1024 * 1024, 0, tb_ticks_per_sec, &divres);
+	tb_to_xs = divres.result_low;
+	setup_default_decr();
+}
+
+static void __init iSeries_progress(char * st, unsigned short code)
+{
+	printk("Progress: [%04x] - %s\n", (unsigned)code, st);
+	if (!piranha_simulator && mf_initialized) {
+		if (code != 0xffff)
+			mf_display_progress(code);
+		else
+			mf_clear_src();
+	}
+}
+
+static void __init iSeries_fixup_klimit(void)
+{
+	/*
+	 * Change klimit to take into account any ram disk
+	 * that may be included
+	 */
+	if (naca.xRamDisk)
+		klimit = KERNELBASE + (u64)naca.xRamDisk +
+			(naca.xRamDiskSize * PAGE_SIZE);
+	else {
+		/*
+		 * No ram disk was included - check and see if there
+		 * was an embedded system map.  Change klimit to take
+		 * into account any embedded system map
+		 */
+		if (embedded_sysmap_end)
+			klimit = KERNELBASE + ((embedded_sysmap_end + 4095) &
+					0xfffffffffffff000);
+	}
+}
+
+static int __init iSeries_src_init(void)
+{
+        /* clear the progress line */
+        ppc_md.progress(" ", 0xffff);
+        return 0;
+}
+
+late_initcall(iSeries_src_init);
+
+void __init iSeries_early_setup(void)
+{
+	iSeries_fixup_klimit();
+
+	ppc_md.setup_arch = iSeries_setup_arch;
+	ppc_md.get_cpuinfo = iSeries_get_cpuinfo;
+	ppc_md.init_IRQ = iSeries_init_IRQ;
+	ppc_md.get_irq = iSeries_get_irq;
+	ppc_md.init_early = iSeries_init_early,
+
+	ppc_md.pcibios_fixup  = iSeries_pci_final_fixup;
+
+	ppc_md.restart = iSeries_restart;
+	ppc_md.power_off = iSeries_power_off;
+	ppc_md.halt = iSeries_halt;
+
+	ppc_md.get_boot_time = iSeries_get_boot_time;
+	ppc_md.set_rtc_time = iSeries_set_rtc_time;
+	ppc_md.get_rtc_time = iSeries_get_rtc_time;
+	ppc_md.calibrate_decr = iSeries_calibrate_decr;
+	ppc_md.progress = iSeries_progress;
+}
+