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linuxconsole-commit
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From: James S. <jsi...@us...> - 2002-03-15 18:28:16
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Update of /cvsroot/linuxconsole/ruby/linux/arch/ppc64/kernel
In directory usw-pr-cvs1:/tmp/cvs-serv4512/linux/arch/ppc64/kernel
Added Files:
chrp_setup.c iSeries_setup.c ioctl32.c open_pic.c
Log Message:
Alots of fixes across many platforms.
--- NEW FILE: chrp_setup.c ---
/*
* linux/arch/ppc/kernel/setup.c
*
* Copyright (C) 1995 Linus Torvalds
* Adapted from 'alpha' version by Gary Thomas
* Modified by Cort Dougan (co...@cs...)
* Modified by PPC64 Team, IBM Corp
*
* 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.
*/
/*
* bootup setup stuff..
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/major.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/blk.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/version.h>
#include <linux/adb.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <asm/mmu.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/pci-bridge.h>
#include <asm/pci_dma.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/irq.h>
#include <asm/keyboard.h>
#include <asm/init.h>
#include <asm/Naca.h>
#include <asm/time.h>
#include "local_irq.h"
#include "i8259.h"
#include "open_pic.h"
#include "xics.h"
#include <asm/ppcdebug.h>
extern volatile unsigned char *chrp_int_ack_special;
extern struct Naca *naca;
void chrp_setup_pci_ptrs(void);
void chrp_progress(char *, unsigned short);
void chrp_request_regions(void);
extern void openpic_init_IRQ(void);
extern void init_ras_IRQ(void);
extern void find_and_init_phbs(void);
extern void pSeries_pcibios_fixup(void);
extern void iSeries_pcibios_fixup(void);
extern void pSeries_get_rtc_time(struct rtc_time *rtc_time);
extern int pSeries_set_rtc_time(struct rtc_time *rtc_time);
void pSeries_calibrate_decr(void);
kdev_t boot_dev;
unsigned long virtPython0Facilities = 0; // python0 facility area (memory mapped io) (64-bit format) VIRTUAL address.
extern HPTE *Hash, *Hash_end;
extern unsigned long Hash_size, Hash_mask;
extern int probingmem;
extern unsigned long loops_per_jiffy;
#ifdef CONFIG_BLK_DEV_RAM
extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */
extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */
extern int rd_image_start; /* starting block # of image */
#endif
void
chrp_get_cpuinfo(struct seq_file *m)
{
struct device_node *root;
const char *model = "";
root = find_path_device("/");
if (root)
model = get_property(root, "model", NULL);
seq_printf(m, "machine\t\t: CHRP %s\n", model);
}
void __init chrp_request_regions(void) {
request_region(0x20,0x20,"pic1");
request_region(0xa0,0x20,"pic2");
request_region(0x00,0x20,"dma1");
request_region(0x40,0x20,"timer");
request_region(0x80,0x10,"dma page reg");
request_region(0xc0,0x20,"dma2");
}
void __init
chrp_setup_arch(void)
{
extern char cmd_line[];
struct device_node *root;
unsigned int *opprop;
/* openpic global configuration register (64-bit format). */
/* openpic Interrupt Source Unit pointer (64-bit format). */
/* python0 facility area (mmio) (64-bit format) REAL address. */
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;
#ifdef CONFIG_BLK_DEV_INITRD
/* this is fine for chrp */
initrd_below_start_ok = 1;
if (initrd_start)
ROOT_DEV = mk_kdev(RAMDISK_MAJOR, 0);
else
#endif
ROOT_DEV = to_kdev_t(0x0802); /* sda2 (sda1 is for the kernel) */
printk("Boot arguments: %s\n", cmd_line);
/* Find and initialize PCI host bridges */
/* iSeries needs to be done much later. */
#ifndef CONFIG_PPC_ISERIES
find_and_init_phbs();
#endif
/* Find the Open PIC if present */
root = find_path_device("/");
opprop = (unsigned int *) get_property(root,
"platform-open-pic", NULL);
if (opprop != 0) {
int n = prom_n_addr_cells(root);
unsigned long openpic;
for (openpic = 0; n > 0; --n)
openpic = (openpic << 32) + *opprop++;
printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic);
udbg_printf("OpenPIC addr: %lx\n", openpic);
OpenPIC_Addr = __ioremap(openpic, 0x40000, _PAGE_NO_CACHE);
}
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
}
void __init
chrp_init2(void)
{
/*
* It is sensitive, when this is called (not too earlu)
* -- tibit
*/
chrp_request_regions();
ppc_md.progress(UTS_RELEASE, 0x7777);
}
/* Early initialization. Relocation is on but do not reference unbolted pages */
void __init pSeries_init_early(void)
{
#ifdef CONFIG_PPC_PSERIES /* This ifdef should go away */
void *comport;
hpte_init_pSeries();
tce_init_pSeries();
pSeries_pcibios_init_early();
#ifdef CONFIG_SMP
smp_init_pSeries();
#endif
/* Map the uart for udbg. */
comport = (void *)__ioremap(naca->serialPortAddr, 16, _PAGE_NO_CACHE);
udbg_init_uart(comport);
ppc_md.udbg_putc = udbg_putc;
ppc_md.udbg_getc = udbg_getc;
ppc_md.udbg_getc_poll = udbg_getc_poll;
#endif
}
void __init
chrp_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
#if 0 /* PPPBBB remove this later... -Peter */
#ifdef CONFIG_BLK_DEV_INITRD
/* take care of initrd if we have one */
if ( r6 )
{
initrd_start = __va(r6);
initrd_end = __va(r6 + r7);
}
#endif /* CONFIG_BLK_DEV_INITRD */
#endif
ppc_md.ppc_machine = _machine;
ppc_md.setup_arch = chrp_setup_arch;
ppc_md.setup_residual = NULL;
ppc_md.get_cpuinfo = chrp_get_cpuinfo;
if(naca->interrupt_controller == IC_OPEN_PIC) {
ppc_md.init_IRQ = openpic_init_IRQ;
ppc_md.get_irq = openpic_get_irq;
ppc_md.post_irq = NULL;
} else {
ppc_md.init_IRQ = xics_init_IRQ;
ppc_md.get_irq = xics_get_irq;
ppc_md.post_irq = NULL;
}
ppc_md.init_ras_IRQ = init_ras_IRQ;
#ifndef CONFIG_PPC_ISERIES
ppc_md.pcibios_fixup = pSeries_pcibios_fixup;
#else
ppc_md.pcibios_fixup = NULL;
// ppc_md.pcibios_fixup = iSeries_pcibios_fixup;
#endif
ppc_md.init = chrp_init2;
ppc_md.restart = rtas_restart;
ppc_md.power_off = rtas_power_off;
ppc_md.halt = rtas_halt;
ppc_md.time_init = NULL;
ppc_md.get_boot_time = pSeries_get_rtc_time;
ppc_md.get_rtc_time = pSeries_get_rtc_time;
ppc_md.set_rtc_time = pSeries_set_rtc_time;
ppc_md.calibrate_decr = pSeries_calibrate_decr;
ppc_md.progress = chrp_progress;
ppc_md.progress("Linux ppc64\n", 0x0);
}
void __chrp
chrp_progress(char *s, unsigned short hex)
{
struct device_node *root;
int width, *p;
char *os;
static int display_character, set_indicator;
static int max_width;
if (hex)
udbg_printf("<chrp_progress> %s\n", s);
if (!rtas.base || (_machine != _MACH_pSeries))
return;
if (max_width == 0) {
if ( (root = find_path_device("/rtas")) &&
(p = (unsigned int *)get_property(root,
"ibm,display-line-length",
NULL)) )
max_width = *p;
else
max_width = 0x10;
display_character = rtas_token("display-character");
set_indicator = rtas_token("set-indicator");
}
if (display_character == RTAS_UNKNOWN_SERVICE) {
/* use hex display */
if (set_indicator == RTAS_UNKNOWN_SERVICE)
return;
rtas_call(set_indicator, 3, 1, NULL, 6, 0, hex);
return;
}
rtas_call(display_character, 1, 1, NULL, '\r');
width = max_width;
os = s;
while ( *os )
{
if ( (*os == '\n') || (*os == '\r') )
width = max_width;
else
width--;
rtas_call(display_character, 1, 1, NULL, *os++ );
/* if we overwrite the screen length */
if ( width == 0 )
while ( (*os != 0) && (*os != '\n') && (*os != '\r') )
os++;
}
/* Blank to end of line. */
while ( width-- > 0 )
rtas_call(display_character, 1, 1, NULL, ' ' );
}
extern void setup_default_decr(void);
void __init pSeries_calibrate_decr(void)
{
struct device_node *cpu;
struct div_result divres;
int *fp;
unsigned long freq;
/*
* The cpu node should have a timebase-frequency property
* to tell us the rate at which the decrementer counts.
*/
freq = 16666000; /* hardcoded default */
cpu = find_type_devices("cpu");
if (cpu != 0) {
fp = (int *) get_property(cpu, "timebase-frequency", NULL);
if (fp != 0)
freq = *fp;
}
printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
freq/1000000, freq%1000000 );
tb_ticks_per_jiffy = freq / HZ;
tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
tb_ticks_per_usec = freq / 1000000;
tb_to_us = mulhwu_scale_factor(freq, 1000000);
div128_by_32( 1024*1024, 0, tb_ticks_per_sec, &divres );
tb_to_xs = divres.result_low;
setup_default_decr();
}
--- NEW FILE: iSeries_setup.c ---
/*
*
*
* Copyright (c) 2000 Mike Corrigan <mi...@us...>
* Copyright (c) 1999-2000 Grant Erickson <gr...@lc...>
*
* 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 <co...@fs...>, and Dan Malek
* <da...@ne...>.
*
* 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 <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/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
void build_valid_hpte( unsigned long vsid, unsigned long ea, unsigned long pa,
pte_t * ptep, unsigned hpteflags, unsigned bolted );
extern void ppcdbg_initialize(void);
extern void iSeries_pcibios_init(void);
extern void iSeries_pcibios_fixup(void);
extern void iSeries_pcibios_fixup_bus(int);
static void iSeries_setup_dprofile(void);
/* 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;
unsigned long dprof_shift = 0;
unsigned long dprof_len = 0;
unsigned int * dprof_buffer = NULL;
int piranha_simulator = 0;
extern char _end[];
extern struct Naca *naca;
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 ) )
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
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 = 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;
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;
}
if (strstr(cmd_line, "dprofile=")) {
char *p, *q;
for (q = cmd_line; (p = strstr(q, "dprofile=")) != 0; ) {
unsigned long size, new_klimit;
q = p + 9;
if (p > cmd_line && p[-1] != ' ')
continue;
dprof_shift = simple_strtoul(q, &q, 0);
dprof_len = (unsigned long)&_etext - (unsigned long)&_stext;
dprof_len >>= dprof_shift;
size = ((dprof_len * sizeof(unsigned int)) + (PAGE_SIZE-1)) & PAGE_MASK;
dprof_buffer = (unsigned int *)((klimit + (PAGE_SIZE-1)) & PAGE_MASK);
new_klimit = ((unsigned long)dprof_buffer) + size;
lmb_reserve( __pa(klimit), (new_klimit-klimit));
klimit = new_klimit;
memset( dprof_buffer, 0, size );
}
}
iSeries_setup_dprofile();
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;
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 htab_data structure */
/* Fill in size of hashed page table */
num_ptegs = hptSizePages * (PAGE_SIZE/(sizeof(HPTE)*HPTES_PER_GROUP));
htab_data.htab_num_ptegs = num_ptegs;
htab_data.htab_hash_mask = num_ptegs - 1;
/* The actual hashed page table is in the hypervisor, we have no direct access */
htab_data.htab = 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
*/
naca->physicalMemorySize = chunk_to_addr(nextPhysChunk);
/* Bolt kernel mappings for all of memory */
iSeries_bolt_kernel( 0, naca->physicalMemorySize );
lmb_init();
lmb_add( 0, naca->physicalMemorySize );
lmb_reserve( 0, __pa(klimit));
/*
* Hardcode to GP size. I am not sure where to get this info. DRENG
*/
naca->slb_size = 64;
}
/*
* Set up the variables that describe the cache line sizes
* for this machine.
*/
static void __init setup_iSeries_cache_sizes(void)
{
unsigned i,n;
naca->iCacheL1LineSize = xIoHriProcessorVpd[0].xInstCacheOperandSize;
naca->dCacheL1LineSize = xIoHriProcessorVpd[0].xDataCacheOperandSize;
naca->iCacheL1LinesPerPage = PAGE_SIZE / naca->iCacheL1LineSize;
naca->dCacheL1LinesPerPage = PAGE_SIZE / naca->dCacheL1LineSize;
i = naca->iCacheL1LineSize;
n = 0;
while ((i=(i/2))) ++n;
naca->iCacheL1LogLineSize = n;
i = naca->dCacheL1LineSize;
n = 0;
while ((i=(i/2))) ++n;
naca->dCacheL1LogLineSize = n;
printk( "D-cache line size = %d (log = %d)\n",
(unsigned)naca->dCacheL1LineSize,
(unsigned)naca->dCacheL1LogLineSize );
printk( "I-cache line size = %d (log = %d)\n",
(unsigned)naca->iCacheL1LineSize,
(unsigned)naca->iCacheL1LogLineSize );
}
/*
* 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 );
if ( hpte.dw0.dw0.v ) {
/* HPTE exists, so just bolt it */
HvCallHpt_setSwBits( slot, 0x10, 0 );
} else {
/* No HPTE exists, so create a new bolted one */
build_valid_hpte(vsid, ea, pa, NULL, mode_rw, 1);
}
}
}
#endif /* CONFIG_PPC_ISERIES */
/*
* Document me.
*/
void __init
iSeries_setup_arch(void)
{
void * eventStack;
/* 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[0].xProcFreq );
procFreqMhz = procFreqHz / 1000000;
procFreqMhzHundreths = (procFreqHz/10000) - (procFreqMhz*100);
/* Compute time base frequency */
tbFreqHz = (((1UL<<32) * 1000000) / xIoHriProcessorVpd[0].xTimeBaseFreq );
tbFreqMhz = tbFreqHz / 1000000;
tbFreqMhzHundreths = (tbFreqHz/10000) - (tbFreqMhz*100);
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 );
printk("Processor version = %x\n",
xIoHriProcessorVpd[0].xPVR );
}
/*
* int iSeries_setup_residual()
*
* Description:
* This routine pretty-prints CPU information gathered from the VPD
* for use in /proc/cpuinfo
*
* Input(s):
* *buffer - Buffer into which CPU data is to be printed.
*
* Output(s):
* *buffer - Buffer with CPU data.
*
* Returns:
* The number of bytes copied into 'buffer' if OK, otherwise zero or less
* on error.
*/
void
iSeries_setup_residual(struct seq_file *m, unsigned long cpu_id)
{
seq_printf(m, "clock\t\t: %lu.%02luMhz\n", procFreqMhz,
procFreqMhzHundreths);
seq_printf(m, "time base\t: %lu.%02luMHz\n", tbFreqMhz,
tbFreqMhzHundreths);
seq_printf(m, "i-cache\t\t: %d\n", naca->iCacheL1LineSize);
seq_printf(m, "d-cache\t\t: %d\n", naca->dCacheL1LineSize);
}
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.
*/
int
iSeries_get_irq(struct pt_regs *regs)
{
/* -2 means ignore this interrupt */
return -2;
}
/*
* Document me.
*/
void
iSeries_restart(char *cmd)
{
mf_reboot();
}
/*
* Document me.
*/
void
iSeries_power_off(void)
{
mf_powerOff();
}
/*
* Document me.
*/
void
iSeries_halt(void)
{
mf_powerOff();
}
/*
* Nothing to do here.
*/
void __init
iSeries_time_init(void)
{
/* Nothing to do */
}
/* JDH Hack */
unsigned long jdh_time = 0;
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.
*
*/
void __init
iSeries_calibrate_decr(void)
{
unsigned long freq;
unsigned long cyclesPerUsec;
unsigned long tbf;
struct div_result divres;
/* Compute decrementer (and TB) frequency
* in cycles/sec
*/
tbf = xIoHriProcessorVpd[0].xTimeBaseFreq;
freq = 0x0100000000;
freq *= 1000000; /* 2^32 * 10^6 */
freq = freq / tbf; /* cycles / sec */
cyclesPerUsec = freq / 1000000; /* cycles / usec */
/* 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 = freq / HZ;
/*
* 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(freq, 1000000);
div128_by_32( 1024*1024, 0, tb_ticks_per_sec, &divres );
tb_to_xs = divres.result_low;
setup_default_decr();
}
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_displayProgress( code );
else
mf_clearSrc();
}
}
void 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 void iSeries_setup_dprofile(void)
{
if ( dprof_buffer ) {
unsigned i;
for (i=0; i<maxPacas; ++i) {
xPaca[i].prof_shift = dprof_shift;
xPaca[i].prof_len = dprof_len-1;
xPaca[i].prof_buffer = dprof_buffer;
xPaca[i].prof_stext = (unsigned *)&_stext;
mb();
xPaca[i].prof_enabled = 1;
}
}
}
--- NEW FILE: ioctl32.c ---
/*
* ioctl32.c: Conversion between 32bit and 64bit native ioctls.
*
* Based on sparc64 ioctl32.c by:
*
* Copyright (C) 1997-2000 Jakub Jelinek (ja...@re...)
* Copyright (C) 1998 Eddie C. Dost (ec...@sk...)
*
* ppc64 changes:
*
* Copyright (C) 2000 Ken Aaker (kd...@rc...)
* Copyright (C) 2001 Anton Blanchard (an...@au...)
*
* These routines maintain argument size conversion between 32bit and 64bit
* ioctls.
*
* 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
[...4532 lines suppressed...]
while (t && t->cmd != cmd)
t = (struct ioctl_trans *)t->next;
if (t) {
handler = (void *)t->handler;
error = handler(fd, cmd, arg, filp);
} else {
static int count = 0;
if (++count <= 20)
printk("sys32_ioctl(%s:%d): Unknown cmd fd(%d) "
"cmd(%08x) arg(%08x)\n",
current->comm, current->pid,
(int)fd, (unsigned int)cmd, (unsigned int)arg);
error = -EINVAL;
}
out:
fput(filp);
out2:
return error;
}
--- NEW FILE: open_pic.c ---
/*
* arch/ppc/kernel/open_pic.c -- OpenPIC Interrupt Handling
*
* Copyright (C) 1997 Geert Uytterhoeven
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/ptrace.h>
#include <asm/signal.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/prom.h>
#include <asm/machdep.h>
#include "local_irq.h"
#include "open_pic.h"
#include "open_pic_defs.h"
#include "i8259.h"
#include <asm/ppcdebug.h>
void* OpenPIC_Addr;
static volatile struct OpenPIC *OpenPIC = NULL;
u_int OpenPIC_NumInitSenses __initdata = 0;
u_char *OpenPIC_InitSenses __initdata = NULL;
extern int use_of_interrupt_tree;
void find_ISUs(void);
static u_int NumProcessors;
static u_int NumSources;
static int NumISUs;
static int open_pic_irq_offset;
static volatile unsigned char* chrp_int_ack_special;
static int broken_ipi_registers;
OpenPIC_SourcePtr ISU[OPENPIC_MAX_ISU];
static void openpic_end_irq(unsigned int irq_nr);
static void openpic_ack_irq(unsigned int irq_nr);
static void openpic_set_affinity(unsigned int irq_nr, unsigned long cpumask);
struct hw_interrupt_type open_pic = {
" OpenPIC ",
NULL,
NULL,
openpic_enable_irq,
openpic_disable_irq,
openpic_ack_irq,
openpic_end_irq,
openpic_set_affinity
};
#ifdef CONFIG_SMP
static void openpic_end_ipi(unsigned int irq_nr);
static void openpic_ack_ipi(unsigned int irq_nr);
static void openpic_enable_ipi(unsigned int irq_nr);
static void openpic_disable_ipi(unsigned int irq_nr);
struct hw_interrupt_type open_pic_ipi = {
" OpenPIC ",
NULL,
NULL,
openpic_enable_ipi,
openpic_disable_ipi,
openpic_ack_ipi,
openpic_end_ipi,
0
};
#endif /* CONFIG_SMP */
unsigned int openpic_vec_ipi;
unsigned int openpic_vec_timer;
unsigned int openpic_vec_spurious;
/*
* Accesses to the current processor's openpic registers
*/
#ifdef CONFIG_SMP
#define THIS_CPU Processor[cpu]
#define DECL_THIS_CPU int cpu = hard_smp_processor_id()
#define CHECK_THIS_CPU check_arg_cpu(cpu)
#else
#define THIS_CPU Processor[hard_smp_processor_id()]
#define DECL_THIS_CPU
#define CHECK_THIS_CPU
#endif /* CONFIG_SMP */
#if 0
#define check_arg_ipi(ipi) \
if (ipi < 0 || ipi >= OPENPIC_NUM_IPI) \
printk(KERN_ERR "open_pic.c:%d: illegal ipi %d\n", __LINE__, ipi);
#define check_arg_timer(timer) \
if (timer < 0 || timer >= OPENPIC_NUM_TIMERS) \
printk(KERN_ERR "open_pic.c:%d: illegal timer %d\n", __LINE__, timer);
#define check_arg_vec(vec) \
if (vec < 0 || vec >= OPENPIC_NUM_VECTORS) \
printk(KERN_ERR "open_pic.c:%d: illegal vector %d\n", __LINE__, vec);
#define check_arg_pri(pri) \
if (pri < 0 || pri >= OPENPIC_NUM_PRI) \
printk(KERN_ERR "open_pic.c:%d: illegal priority %d\n", __LINE__, pri);
/*
* Print out a backtrace if it's out of range, since if it's larger than NR_IRQ's
* data has probably been corrupted and we're going to panic or deadlock later
* anyway --Troy
*/
extern unsigned long* _get_SP(void);
#define check_arg_irq(irq) \
if (irq < open_pic_irq_offset || irq >= (NumSources+open_pic_irq_offset)){ \
printk(KERN_ERR "open_pic.c:%d: illegal irq %d\n", __LINE__, irq); \
print_backtrace(_get_SP()); }
#define check_arg_cpu(cpu) \
if (cpu < 0 || cpu >= OPENPIC_MAX_PROCESSORS){ \
printk(KERN_ERR "open_pic.c:%d: illegal cpu %d\n", __LINE__, cpu); \
print_backtrace(_get_SP()); }
#else
#define check_arg_ipi(ipi) do {} while (0)
#define check_arg_timer(timer) do {} while (0)
#define check_arg_vec(vec) do {} while (0)
#define check_arg_pri(pri) do {} while (0)
#define check_arg_irq(irq) do {} while (0)
#define check_arg_cpu(cpu) do {} while (0)
#endif
#define GET_ISU(source) ISU[(source) >> 4][(source) & 0xf]
void __init openpic_init_IRQ(void)
{
struct device_node *np;
int i;
unsigned int *addrp;
unsigned char* chrp_int_ack_special = 0;
unsigned char init_senses[NR_IRQS - NUM_8259_INTERRUPTS];
int nmi_irq = -1;
if (!(np = find_devices("pci"))
|| !(addrp = (unsigned int *)
get_property(np, "8259-interrupt-acknowledge", NULL)))
printk(KERN_ERR "Cannot find pci to get ack address\n");
else
chrp_int_ack_special = (unsigned char *)
__ioremap(addrp[prom_n_addr_cells(np)-1], 1, _PAGE_NO_CACHE);
/* hydra still sets OpenPIC_InitSenses to a static set of values */
if (OpenPIC_InitSenses == NULL) {
prom_get_irq_senses(init_senses, NUM_8259_INTERRUPTS, NR_IRQS);
OpenPIC_InitSenses = init_senses;
OpenPIC_NumInitSenses = NR_IRQS - NUM_8259_INTERRUPTS;
}
openpic_init(1, NUM_8259_INTERRUPTS, chrp_int_ack_special, nmi_irq);
for ( i = 0 ; i < NUM_8259_INTERRUPTS ; i++ )
irq_desc[i].handler = &i8259_pic;
i8259_init();
}
static inline u_int openpic_read(volatile u_int *addr)
{
u_int val;
val = in_le32(addr);
return val;
}
static inline void openpic_write(volatile u_int *addr, u_int val)
{
out_le32(addr, val);
}
static inline u_int openpic_readfield(volatile u_int *addr, u_int mask)
{
u_int val = openpic_read(addr);
return val & mask;
}
static inline void openpic_writefield(volatile u_int *addr, u_int mask,
u_int field)
{
u_int val = openpic_read(addr);
openpic_write(addr, (val & ~mask) | (field & mask));
}
static inline void openpic_clearfield(volatile u_int *addr, u_int mask)
{
openpic_writefield(addr, mask, 0);
}
static inline void openpic_setfield(volatile u_int *addr, u_int mask)
{
openpic_writefield(addr, mask, mask);
}
static void openpic_safe_writefield(volatile u_int *addr, u_int mask,
u_int field)
{
unsigned int loops = 100000;
openpic_setfield(addr, OPENPIC_MASK);
while (openpic_read(addr) & OPENPIC_ACTIVITY) {
if (!loops--) {
printk(KERN_ERR "openpic_safe_writefield timeout\n");
break;
}
}
openpic_writefield(addr, mask | OPENPIC_MASK, field | OPENPIC_MASK);
}
#ifdef CONFIG_SMP
static u_int openpic_read_IPI(volatile u_int* addr)
{
u_int val = 0;
if (broken_ipi_registers)
/* yes this is right ... bug, feature, you decide! -- tgall */
val = in_be32(addr);
else
val = in_le32(addr);
return val;
}
static void openpic_test_broken_IPI(void)
{
u_int t;
openpic_write(&OpenPIC->Global.IPI_Vector_Priority(0), OPENPIC_MASK);
t = openpic_read(&OpenPIC->Global.IPI_Vector_Priority(0));
if (t == le32_to_cpu(OPENPIC_MASK)) {
printk(KERN_INFO "OpenPIC reversed IPI registers detected\n");
broken_ipi_registers = 1;
}
}
/* because of the power3 be / le above, this is needed */
static inline void openpic_writefield_IPI(volatile u_int* addr, u_int mask, u_int field)
{
u_int val = openpic_read_IPI(addr);
openpic_write(addr, (val & ~mask) | (field & mask));
}
static inline void openpic_clearfield_IPI(volatile u_int *addr, u_int mask)
{
openpic_writefield_IPI(addr, mask, 0);
}
static inline void openpic_setfield_IPI(volatile u_int *addr, u_int mask)
{
openpic_writefield_IPI(addr, mask, mask);
}
static void openpic_safe_writefield_IPI(volatile u_int *addr, u_int mask, u_int field)
{
unsigned int loops = 100000;
openpic_setfield_IPI(addr, OPENPIC_MASK);
/* wait until it's not in use */
/* BenH: Is this code really enough ? I would rather check the result
* and eventually retry ...
*/
while(openpic_read_IPI(addr) & OPENPIC_ACTIVITY) {
if (!loops--) {
printk(KERN_ERR "openpic_safe_writefield timeout\n");
break;
}
}
openpic_writefield_IPI(addr, mask, field | OPENPIC_MASK);
}
#endif /* CONFIG_SMP */
void __init openpic_init(int main_pic, int offset, unsigned char* chrp_ack,
int programmer_switch_irq)
{
u_int t, i;
u_int timerfreq;
const char *version;
if (!OpenPIC_Addr) {
printk(KERN_INFO "No OpenPIC found !\n");
return;
}
OpenPIC = (volatile struct OpenPIC *)OpenPIC_Addr;
ppc_md.progress("openpic enter",0x122);
t = openpic_read(&OpenPIC->Global.Feature_Reporting0);
switch (t & OPENPIC_FEATURE_VERSION_MASK) {
case 1:
version = "1.0";
break;
case 2:
version = "1.2";
break;
case 3:
version = "1.3";
break;
default:
version = "?";
break;
}
NumProcessors = ((t & OPENPIC_FEATURE_LAST_PROCESSOR_MASK) >>
OPENPIC_FEATURE_LAST_PROCESSOR_SHIFT) + 1;
NumSources = ((t & OPENPIC_FEATURE_LAST_SOURCE_MASK) >>
OPENPIC_FEATURE_LAST_SOURCE_SHIFT) + 1;
printk(KERN_INFO "OpenPIC Version %s (%d CPUs and %d IRQ sources) at %p\n",
version, NumProcessors, NumSources, OpenPIC);
timerfreq = openpic_read(&OpenPIC->Global.Timer_Frequency);
if (timerfreq)
printk(KERN_INFO "OpenPIC timer frequency is %d.%06d MHz\n",
timerfreq / 1000000, timerfreq % 1000000);
if (!main_pic)
return;
open_pic_irq_offset = offset;
chrp_int_ack_special = (volatile unsigned char*)chrp_ack;
find_ISUs();
/* Initialize timer interrupts */
ppc_md.progress("openpic timer",0x3ba);
for (i = 0; i < OPENPIC_NUM_TIMERS; i++) {
/* Disabled, Priority 0 */
openpic_inittimer(i, 0, openpic_vec_timer+i);
/* No processor */
openpic_maptimer(i, 0);
}
#ifdef CONFIG_SMP
/* Initialize IPI interrupts */
ppc_md.progress("openpic ipi",0x3bb);
openpic_test_broken_IPI();
for (i = 0; i < OPENPIC_NUM_IPI; i++) {
/* Disabled, Priority 10..13 */
openpic_initipi(i, 10+i, openpic_vec_ipi+i);
/* IPIs are per-CPU */
irq_desc[openpic_vec_ipi+i].status |= IRQ_PER_CPU;
irq_desc[openpic_vec_ipi+i].handler = &open_pic_ipi;
}
#endif
/* Initialize external interrupts */
ppc_md.progress("openpic ext",0x3bc);
openpic_set_priority(0xf);
/* SIOint (8259 cascade) is special */
if (offset) {
openpic_initirq(0, 8, offset, 1, 1);
openpic_mapirq(0, 1<<get_hard_smp_processor_id(0));
}
/* Init all external sources */
for (i = 1; i < NumSources; i++) {
int pri, sense;
/* the bootloader may have left it enabled (bad !) */
openpic_disable_irq(i+offset);
pri = (i == programmer_switch_irq)? 9: 8;
sense = (i < OpenPIC_NumInitSenses)? OpenPIC_InitSenses[i]: 1;
if (sense)
irq_desc[i+offset].status = IRQ_LEVEL;
/* Enabled, Priority 8 or 9 */
openpic_initirq(i, pri, i+offset, !sense, sense);
/* Processor 0 */
openpic_mapirq(i, 1<<get_hard_smp_processor_id(0));
}
/* Init descriptors */
for (i = offset; i < NumSources + offset; i++)
irq_desc[i].handler = &open_pic;
/* Initialize the spurious interrupt */
ppc_md.progress("openpic spurious",0x3bd);
openpic_set_spurious(openpic_vec_spurious);
/* Initialize the cascade */
if (offset) {
if (request_irq(offset, no_action, SA_INTERRUPT,
"82c59 cascade", NULL))
printk(KERN_ERR "Unable to get OpenPIC IRQ 0 for cascade\n");
}
openpic_set_priority(0);
openpic_disable_8259_pass_through();
ppc_md.progress("openpic exit",0x222);
}
void openpic_setup_ISU(int isu_num, unsigned long addr)
{
if (isu_num >= OPENPIC_MAX_ISU)
return;
ISU[isu_num] = (OpenPIC_SourcePtr) __ioremap(addr, 0x400, _PAGE_NO_CACHE);
if (isu_num >= NumISUs)
NumISUs = isu_num + 1;
}
void find_ISUs(void)
{
/* Use /interrupt-controller/reg and
* /interrupt-controller/interrupt-ranges from OF device tree
* the ISU array is setup in chrp_pci.c in ibm_add_bridges
* as a result
* -- tgall
*/
/* basically each ISU is a bus, and this assumes that
* open_pic_isu_count interrupts per bus are possible
* ISU == Interrupt Source
*/
NumSources = NumISUs * 0x10;
openpic_vec_ipi = NumSources + open_pic_irq_offset;
openpic_vec_timer = openpic_vec_ipi + OPENPIC_NUM_IPI;
openpic_vec_spurious = openpic_vec_timer + OPENPIC_NUM_TIMERS;
}
static inline void openpic_reset(void)
{
openpic_setfield(&OpenPIC->Global.Global_Configuration0,
OPENPIC_CONFIG_RESET);
}
static inline void openpic_enable_8259_pass_through(void)
{
openpic_clearfield(&OpenPIC->Global.Global_Configuration0,
OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE);
}
static void openpic_disable_8259_pass_through(void)
{
openpic_setfield(&OpenPIC->Global.Global_Configuration0,
OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE);
}
/*
* Find out the current interrupt
*/
static u_int openpic_irq(void)
{
u_int vec;
DECL_THIS_CPU;
CHECK_THIS_CPU;
vec = openpic_readfield(&OpenPIC->THIS_CPU.Interrupt_Acknowledge,
OPENPIC_VECTOR_MASK);
return vec;
}
static void openpic_eoi(void)
{
DECL_THIS_CPU;
CHECK_THIS_CPU;
openpic_write(&OpenPIC->THIS_CPU.EOI, 0);
/* Handle PCI write posting */
(void)openpic_read(&OpenPIC->THIS_CPU.EOI);
}
static inline u_int openpic_get_priority(void)
{
DECL_THIS_CPU;
CHECK_THIS_CPU;
return openpic_readfield(&OpenPIC->THIS_CPU.Current_Task_Priority,
OPENPIC_CURRENT_TASK_PRIORITY_MASK);
}
static void openpic_set_priority(u_int pri)
{
DECL_THIS_CPU;
CHECK_THIS_CPU;
check_arg_pri(pri);
openpic_writefield(&OpenPIC->THIS_CPU.Current_Task_Priority,
OPENPIC_CURRENT_TASK_PRIORITY_MASK, pri);
}
/*
* Get/set the spurious vector
*/
static inline u_int openpic_get_spurious(void)
{
return openpic_readfield(&OpenPIC->Global.Spurious_Vector,
OPENPIC_VECTOR_MASK);
}
static void openpic_set_spurious(u_int vec)
{
check_arg_vec(vec);
openpic_writefield(&OpenPIC->Global.Spurious_Vector, OPENPIC_VECTOR_MASK,
vec);
}
/*
* Convert a cpu mask from logical to physical cpu numbers.
*/
static inline u32 physmask(u32 cpumask)
{
int i;
u32 mask = 0;
for (i = 0; i < smp_num_cpus; ++i, cpumask >>= 1)
mask |= (cpumask & 1) << get_hard_smp_processor_id(i);
return mask;
}
void openpic_init_processor(u_int cpumask)
{
openpic_write(&OpenPIC->Global.Processor_Initialization,
physmask(cpumask));
}
#ifdef CONFIG_SMP
/*
* Initialize an interprocessor interrupt (and disable it)
*
* ipi: OpenPIC interprocessor interrupt number
* pri: interrupt source priority
* vec: the vector it will produce
*/
static void __init openpic_initipi(u_int ipi, u_int pri, u_int vec)
{
check_arg_ipi(ipi);
check_arg_pri(pri);
check_arg_vec(vec);
openpic_safe_writefield_IPI(&OpenPIC->Global.IPI_Vector_Priority(ipi),
OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK,
(pri << OPENPIC_PRIORITY_SHIFT) | vec);
}
/*
* Send an IPI to one or more CPUs
*
* Externally called, however, it takes an IPI number (0...OPENPIC_NUM_IPI)
* and not a system-wide interrupt number
*/
void openpic_cause_IPI(u_int ipi, u_int cpumask)
{
DECL_THIS_CPU;
CHECK_THIS_CPU;
check_arg_ipi(ipi);
openpic_write(&OpenPIC->THIS_CPU.IPI_Dispatch(ipi),
physmask(cpumask));
}
void openpic_request_IPIs(void)
{
int i;
/*
* Make sure this matches what is defined in smp.c for
* smp_message_{pass|recv}() or what shows up in
* /proc/interrupts will be wrong!!! --Troy */
if (OpenPIC == NULL)
return;
request_irq(openpic_vec_ipi,
openpic_ipi_action, 0, "IPI0 (call function)", 0);
request_irq(openpic_vec_ipi+1,
openpic_ipi_action, 0, "IPI1 (reschedule)", 0);
request_irq(openpic_vec_ipi+2,
openpic_ipi_action, 0, "IPI2 (invalidate tlb)", 0);
request_irq(openpic_vec_ipi+3,
openpic_ipi_action, 0, "IPI3 (xmon break)", 0);
for ( i = 0; i < OPENPIC_NUM_IPI ; i++ )
openpic_enable_ipi(openpic_vec_ipi+i);
}
/*
* Do per-cpu setup for SMP systems.
*
* Get IPI's working and start taking interrupts.
* -- Cort
*/
static spinlock_t openpic_setup_lock __initdata = SPIN_LOCK_UNLOCKED;
void __init do_openpic_setup_cpu(void)
{
#ifdef CONFIG_IRQ_ALL_CPUS
int i;
u32 msk = 1 << hard_smp_processor_id();
#endif
spin_lock(&openpic_setup_lock);
#ifdef CONFIG_IRQ_ALL_CPUS
/* let the openpic know we want intrs. default affinity
* is 0xffffffff until changed via /proc
* That's how it's done on x86. If we want it differently, then
* we should make sure we also change the default values of irq_affinity
* in irq.c.
*/
for (i = 0; i < NumSources ; i++)
openpic_mapirq(i, openpic_read(&GET_ISU(i).Destination) | msk);
#endif /* CONFIG_IRQ_ALL_CPUS */
openpic_set_priority(0);
spin_unlock(&openpic_setup_lock);
}
#endif /* CONFIG_SMP */
/*
* Initialize a timer interrupt (and disable it)
*
* timer: OpenPIC timer number
* pri: interrupt source priority
* vec: the vector it will produce
*/
static void __init openpic_inittimer(u_int timer, u_int pri, u_int vec)
{
check_arg_timer(timer);
check_arg_pri(pri);
check_arg_vec(vec);
openpic_safe_writefield(&OpenPIC->Global.Timer[timer].Vector_Priority,
OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK,
(pri << OPENPIC_PRIORITY_SHIFT) | vec);
}
/*
* Map a timer interrupt to one or more CPUs
*/
static void __init openpic_maptimer(u_int timer, u_int cpumask)
{
check_arg_timer(timer);
openpic_write(&OpenPIC->Global.Timer[timer].Destination,
physmask(cpumask));
}
/*
*
* All functions below take an offset'ed irq argument
*
*/
/*
* Enable/disable an external interrupt source
*
* Externally called, irq is an offseted system-wide interrupt number
*/
static void openpic_enable_irq(u_int irq)
{
unsigned int loops = 100000;
check_arg_irq(irq);
openpic_clearfield(&GET_ISU(irq - open_pic_irq_offset).Vector_Priority, OPENPIC_MASK);
/* make sure mask gets to controller before we return to user */
do {
if (!loops--) {
printk(KERN_ERR "openpic_enable_irq timeout\n");
break;
}
mb(); /* sync is probably useless here */
} while(openpic_readfield(&GET_ISU(irq - open_pic_irq_offset).Vector_Priority,
OPENPIC_MASK));
}
static void openpic_disable_irq(u_int irq)
{
u32 vp;
unsigned int loops = 100000;
check_arg_irq(irq);
openpic_setfield(&GET_ISU(irq - open_pic_irq_offset).Vector_Priority, OPENPIC_MASK);
/* make sure mask gets to controller before we return to user */
do {
if (!loops--) {
printk(KERN_ERR "openpic_disable_irq timeout\n");
break;
}
mb(); /* sync is probably useless here */
vp = openpic_readfield(&GET_ISU(irq - open_pic_irq_offset).Vector_Priority,
OPENPIC_MASK | OPENPIC_ACTIVITY);
} while((vp & OPENPIC_ACTIVITY) && !(vp & OPENPIC_MASK));
}
#ifdef CONFIG_SMP
/*
* Enable/disable an IPI interrupt source
*
* Externally called, irq is an offseted system-wide interrupt number
*/
void openpic_enable_ipi(u_int irq)
{
irq -= openpic_vec_ipi;
check_arg_ipi(irq);
openpic_clearfield_IPI(&OpenPIC->Global.IPI_Vector_Priority(irq), OPENPIC_MASK);
}
void openpic_disable_ipi(u_int irq)
{
/* NEVER disable an IPI... that's just plain wrong! */
}
#endif
/*
* Initialize an interrupt source (and disable it!)
*
* irq: OpenPIC interrupt number
* pri: interrupt source priority
* vec: the vector it will produce
* pol: polarity (1 for positive, 0 for negative)
* sense: 1 for level, 0 for edge
*/
static void openpic_initirq(u_int irq, u_int pri, u_int vec, int pol, int sense)
{
openpic_safe_writefield(&GET_ISU(irq).Vector_Priority,
OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK |
OPENPIC_SENSE_MASK | OPENPIC_POLARITY_MASK,
(pri << OPENPIC_PRIORITY_SHIFT) | vec |
(pol ? OPENPIC_POLARITY_POSITIVE :
OPENPIC_POLARITY_NEGATIVE) |
(sense ? OPENPIC_SENSE_LEVEL : OPENPIC_SENSE_EDGE));
}
/*
* Map an interrupt source to one or more CPUs
*/
static void openpic_mapirq(u_int irq, u_int physmask)
{
openpic_write(&GET_ISU(irq).Destination, physmask);
}
/*
* Set the sense for an interrupt source (and disable it!)
*
* sense: 1 for level, 0 for edge
*/
static inline void openpic_set_sense(u_int irq, int sense)
{
openpic_safe_writefield(&GET_ISU(irq).Vector_Priority,
OPENPIC_SENSE_LEVEL,
(sense ? OPENPIC_SENSE_LEVEL : 0));
}
/* No spinlocks, should not be necessary with the OpenPIC
* (1 register = 1 interrupt and we have the desc lock).
*/
static void openpic_ack_irq(unsigned int irq_nr)
{
}
static void openpic_end_irq(unsigned int irq_nr)
{
if ((irq_desc[irq_nr].status & IRQ_LEVEL) != 0)
openpic_eoi();
}
static void openpic_set_affinity(unsigned int irq_nr, unsigned long cpumask)
{
openpic_mapirq(irq_nr - open_pic_irq_offset, physmask(cpumask));
}
#ifdef CONFIG_SMP
static void openpic_ack_ipi(unsigned int irq_nr)
{
}
static void openpic_end_ipi(unsigned int irq_nr)
{
/* IPIs are marked IRQ_PER_CPU. This has the side effect of
* preventing the IRQ_PENDING/IRQ_INPROGRESS logic from
* applying to them. We EOI them late to avoid re-entering.
* however, I'm wondering if we could simply let them have the
* SA_INTERRUPT flag and let them execute with all interrupts OFF.
* This would have the side effect of either running cross-CPU
* functions with interrupts off, or we can re-enable them explicitely
* with a __sti() in smp_call_function_interrupt(), since
* smp_call_function() is protected by a spinlock.
* Or maybe we shouldn't set the IRQ_PER_CPU flag on cross-CPU
* function calls IPI at all but that would make a special case.
*/
openpic_eoi();
}
static void openpic_ipi_action(int cpl, void *dev_id, struct pt_regs *regs)
{
smp_message_recv(cpl-openpic_vec_ipi, regs);
}
#endif /* CONFIG_SMP */
int openpic_get_irq(struct pt_regs *regs)
{
extern int i8259_irq(int cpu);
int irq = openpic_irq();
/* Management of the cascade should be moved out of here */
if (open_pic_irq_offset && irq == open_pic_irq_offset)
{
/*
* This magic address generates a PCI IACK cycle.
*/
if ( chrp_int_ack_special )
irq = *chrp_int_ack_special;
else
irq = i8259_irq( smp_processor_id() );
openpic_eoi();
}
if (irq == openpic_vec_spurious)
irq = -1;
return irq;
}
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