iseries_setup.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

/*
 * 
 *
 *    Copyright (c) 2000 Mike Corrigan <[e-mail]>
 *    Copyright (c) 1999-2000 Grant Erickson <[e-mail]>
 *
 *    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 <[e-mail]>, and Dan Malek
 *      <[e-mail]>.
 *
 *      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.
 */
 
#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/blk.h>
#include <linux/seq_file.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/time.h>
#include "iSeries_setup.h"
#include <asm/naca.h>
#include <asm/paca.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/proc_pmc.h>
#include <asm/perfmon.h>
#include <asm/iSeries/mf.h>

/* Function Prototypes */

extern void abort(void);
#ifdef CONFIG_PPC_ISERIES
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);
#endif
extern void ppcdbg_initialize(void);
extern void iSeries_pcibios_init(void);
extern void iSeries_pcibios_fixup(void);
extern void iSeries_pcibios_fixup_bus(int);

/* Global Variables */

static unsigned long procFreqHz = 0;
static unsigned long procFreqMhz = 0;
static unsigned long procFreqMhzHundreths = 0;

static unsigned long tbFreqHz = 0;
static unsigned long tbFreqMhz = 0;
static unsigned long tbFreqMhzHundreths = 0;

int piranha_simulator = 0;

extern char _end[];

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;

extern char _stext;
extern char _etext;

static int mf_initialized = 0;

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.
 */

unsigned long iSeries_process_Condor_mainstore_vpd( struct MemoryBlock *mb_array, unsigned long max_entries )
{
	/* Determine if absolute memory has any
	 * holes so that we can interpret the
	 * access map we get back from the hypervisor
	 * correctly.
	 */
	
	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");

	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
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;

}

unsigned long iSeries_process_mainstore_vpd( struct MemoryBlock *mb_array, unsigned long max_entries )
{
	unsigned long i;
	unsigned long mem_blocks = 0;
	if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
		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;
}

/*
 * void __init iSeries_init_early()
 */



void __init
iSeries_init_early(void)
{
#ifdef CONFIG_PPC_ISERIES
#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 = MKDEV( RAMDISK_MAJOR, 0 );

		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();

	ppc_md.setup_arch	 	= iSeries_setup_arch;
	ppc_md.setup_residual	 	= iSeries_setup_residual;
	ppc_md.get_cpuinfo	 	= iSeries_get_cpuinfo;
	ppc_md.irq_cannonicalize 	= NULL;
	ppc_md.init_IRQ		 	= iSeries_init_IRQ;
	ppc_md.init_ras_IRQ		= NULL;
	ppc_md.get_irq		 	= iSeries_get_irq;
	ppc_md.init		 	= NULL;

 	ppc_md.pcibios_fixup        = iSeries_pcibios_fixup;
	ppc_md.pcibios_fixup_bus    = iSeries_pcibios_fixup_bus;

	ppc_md.restart		 	= iSeries_restart;
	ppc_md.power_off	 	= iSeries_power_off;
	ppc_md.halt		 	= iSeries_halt;

	ppc_md.time_init	 	= NULL;
	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;

	ppc_md.kbd_setkeycode    	= NULL;
	ppc_md.kbd_getkeycode    	= NULL;
	ppc_md.kbd_translate     	= NULL;
	ppc_md.kbd_unexpected_up 	= NULL;
	ppc_md.kbd_leds          	= NULL;
	ppc_md.kbd_init_hw       	= NULL;

#if defined(CONFIG_MAGIC_SYSRQ)
	ppc_md.ppc_kbd_sysrq_xlate	= NULL;
#endif
	
	hpte_init_iSeries();
	tce_init_iSeries();

	/* Initialize the table which translate Linux physical addresses to
	 * AS/400 absolute addresses
	 */

	build_iSeries_Memory_Map();

	setup_iSeries_cache_sizes();

	/* Initialize machine-dependency vectors */


#ifdef CONFIG_SMP
	smp_init_iSeries();
#endif

	if ( itLpNaca.xPirEnvironMode == 0 ) 
		piranha_simulator = 1;
#endif
}

/*
 * void __init iSeries_init()
 */

void __init
iSeries_init(unsigned long r3, unsigned long r4, unsigned long r5, 
	   unsigned long r6, unsigned long r7)
{
	/* Associate Lp Event Queue 0 with processor 0 */
	HvCallEvent_setLpEventQueueInterruptProc( 0, 0 );

	{
		/* copy the command line parameter from the primary VSP  */
		char *p, *q;
		HvCallEvent_dmaToSp( cmd_line,
				     2*64*1024,
				     256,
				     HvLpDma_Direction_RemoteToLocal );

		p = q = cmd_line + 255;
		while( p > cmd_line ) {
			if ((*p == 0) || (*p == ' ') || (*p == '\n'))
				--p;
			else
				break;
		}
		if ( p < q )
			*(p+1) = 0;
	}

	iSeries_proc_early_init();	
	mf_init();
	mf_initialized = 1;
	mb();

	iSeries_proc_callback( &pmc_proc_init );
}

#ifdef CONFIG_PPC_ISERIES
/*
 * 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;