488f84994c
Presently the LparMap, one of the structures the kernel shares with the legacy iSeries hypervisor has a fixed offset address in head.S. This patch changes this so the LparMap is a normally initialized structure, without fixed address. This allows us to use macros to compute some of the values in the structure, which wasn't previously possible because the assembler always uses signed-% which gets the wrong answers for the computations in question. Unfortunately, a gcc bug means that doing this requires another structure (hvReleaseData) to be initialized in asm instead of C, but on the whole the result is cleaner than before. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
320 lines
11 KiB
C
320 lines
11 KiB
C
/*
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* Copyright 2001 Mike Corrigan, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/threads.h>
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#include <linux/module.h>
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#include <linux/bitops.h>
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#include <asm/processor.h>
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#include <asm/ptrace.h>
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#include <asm/naca.h>
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#include <asm/abs_addr.h>
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#include <asm/iSeries/ItLpNaca.h>
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#include <asm/lppaca.h>
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#include <asm/iSeries/ItLpRegSave.h>
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#include <asm/paca.h>
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#include <asm/iSeries/HvReleaseData.h>
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#include <asm/iSeries/LparMap.h>
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#include <asm/iSeries/ItVpdAreas.h>
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#include <asm/iSeries/ItIplParmsReal.h>
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#include <asm/iSeries/ItExtVpdPanel.h>
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#include <asm/iSeries/ItLpQueue.h>
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#include <asm/iSeries/IoHriProcessorVpd.h>
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#include <asm/iSeries/ItSpCommArea.h>
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/* The HvReleaseData is the root of the information shared between
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* the hypervisor and Linux.
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*/
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/*
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* WARNING - magic here
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*
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* Ok, this is a horrid hack below, but marginally better than the
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* alternatives. What we really want is just to initialize
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* hvReleaseData in C as in the #if 0 section here. However, gcc
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* refuses to believe that (u32)&x is a constant expression, so will
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* not allow the xMsNucDataOffset field to be properly initialized.
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* So, we declare hvReleaseData in inline asm instead. We use inline
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* asm, rather than a .S file, because the assembler won't generate
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* the necessary relocation for the LparMap either, unless that symbol
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* is declared in the same source file. Finally, we put the asm in a
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* dummy, attribute-used function, instead of at file scope, because
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* file scope asms don't allow contraints. We want to use the "i"
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* constraints to put sizeof() and offsetof() expressions in there,
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* because including asm/offsets.h in C code then stringifying causes
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* all manner of warnings.
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*/
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#if 0
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struct HvReleaseData hvReleaseData = {
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.xDesc = 0xc8a5d9c4, /* "HvRD" ebcdic */
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.xSize = sizeof(struct HvReleaseData),
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.xVpdAreasPtrOffset = offsetof(struct naca_struct, xItVpdAreas),
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.xSlicNacaAddr = &naca, /* 64-bit Naca address */
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.xMsNucDataOffset = (u32)((unsigned long)&xLparMap - KERNELBASE),
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.xFlags = HVREL_TAGSINACTIVE /* tags inactive */
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/* 64 bit */
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/* shared processors */
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/* HMT allowed */
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| 6, /* TEMP: This allows non-GA driver */
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.xVrmIndex = 4, /* We are v5r2m0 */
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.xMinSupportedPlicVrmIndex = 3, /* v5r1m0 */
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.xMinCompatablePlicVrmIndex = 3, /* v5r1m0 */
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.xVrmName = { 0xd3, 0x89, 0x95, 0xa4, /* "Linux 2.4.64" ebcdic */
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0xa7, 0x40, 0xf2, 0x4b,
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0xf4, 0x4b, 0xf6, 0xf4 },
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};
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#endif
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extern struct HvReleaseData hvReleaseData;
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static void __attribute_used__ hvReleaseData_wrapper(void)
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{
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/* This doesn't appear to need any alignment (even 4 byte) */
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asm volatile (
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" lparMapPhys = xLparMap - %3\n"
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" .data\n"
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" .globl hvReleaseData\n"
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"hvReleaseData:\n"
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" .long 0xc8a5d9c4\n" /* xDesc */
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/* "HvRD" in ebcdic */
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" .short %0\n" /* xSize */
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" .short %1\n" /* xVpdAreasPtrOffset */
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" .llong naca\n" /* xSlicNacaAddr */
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" .long lparMapPhys\n" /* xMsNucDataOffset */
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" .long 0\n" /* xRsvd1 */
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" .short %2\n" /* xFlags */
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" .short 4\n" /* xVrmIndex - v5r2m0 */
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" .short 3\n" /* xMinSupportedPlicVrmIndex - v5r1m0 */
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" .short 3\n" /* xMinCompatablePlicVrmIndex - v5r1m0 */
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" .long 0xd38995a4\n" /* xVrmName */
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" .long 0xa740f24b\n" /* "Linux 2.4.64" ebcdic */
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" .long 0xf44bf6f4\n"
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" . = hvReleaseData + %0\n"
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" .previous\n"
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: : "i"(sizeof(hvReleaseData)),
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"i"(offsetof(struct naca_struct, xItVpdAreas)),
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"i"(HVREL_TAGSINACTIVE /* tags inactive, 64 bit, */
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/* shared processors, HMT allowed */
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| 6), /* TEMP: This allows non-GA drivers */
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"i"(KERNELBASE)
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);
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}
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struct LparMap __attribute__((aligned (16))) xLparMap = {
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.xNumberEsids = HvEsidsToMap,
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.xNumberRanges = HvRangesToMap,
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.xSegmentTableOffs = STAB0_PAGE,
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.xEsids = {
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{ .xKernelEsid = GET_ESID(KERNELBASE),
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.xKernelVsid = KERNEL_VSID(KERNELBASE), },
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{ .xKernelEsid = GET_ESID(VMALLOCBASE),
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.xKernelVsid = KERNEL_VSID(VMALLOCBASE), },
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},
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.xRanges = {
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{ .xPages = HvPagesToMap,
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.xOffset = 0,
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.xVPN = KERNEL_VSID(KERNELBASE) << (SID_SHIFT - PAGE_SHIFT),
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},
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},
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};
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extern void system_reset_iSeries(void);
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extern void machine_check_iSeries(void);
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extern void data_access_iSeries(void);
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extern void instruction_access_iSeries(void);
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extern void hardware_interrupt_iSeries(void);
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extern void alignment_iSeries(void);
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extern void program_check_iSeries(void);
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extern void fp_unavailable_iSeries(void);
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extern void decrementer_iSeries(void);
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extern void trap_0a_iSeries(void);
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extern void trap_0b_iSeries(void);
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extern void system_call_iSeries(void);
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extern void single_step_iSeries(void);
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extern void trap_0e_iSeries(void);
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extern void performance_monitor_iSeries(void);
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extern void data_access_slb_iSeries(void);
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extern void instruction_access_slb_iSeries(void);
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struct ItLpNaca itLpNaca = {
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.xDesc = 0xd397d581, /* "LpNa" ebcdic */
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.xSize = 0x0400, /* size of ItLpNaca */
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.xIntHdlrOffset = 0x0300, /* offset to int array */
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.xMaxIntHdlrEntries = 19, /* # ents */
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.xPrimaryLpIndex = 0, /* Part # of primary */
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.xServiceLpIndex = 0, /* Part # of serv */
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.xLpIndex = 0, /* Part # of me */
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.xMaxLpQueues = 0, /* # of LP queues */
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.xLpQueueOffset = 0x100, /* offset of start of LP queues */
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.xPirEnvironMode = 0, /* Piranha stuff */
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.xPirConsoleMode = 0,
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.xPirDasdMode = 0,
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.xLparInstalled = 0,
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.xSysPartitioned = 0,
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.xHwSyncedTBs = 0,
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.xIntProcUtilHmt = 0,
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.xSpVpdFormat = 0,
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.xIntProcRatio = 0,
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.xPlicVrmIndex = 0, /* VRM index of PLIC */
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.xMinSupportedSlicVrmInd = 0, /* min supported SLIC */
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.xMinCompatableSlicVrmInd = 0, /* min compat SLIC */
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.xLoadAreaAddr = 0, /* 64-bit addr of load area */
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.xLoadAreaChunks = 0, /* chunks for load area */
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.xPaseSysCallCRMask = 0, /* PASE mask */
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.xSlicSegmentTablePtr = 0, /* seg table */
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.xOldLpQueue = { 0 }, /* Old LP Queue */
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.xInterruptHdlr = {
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(u64)system_reset_iSeries, /* 0x100 System Reset */
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(u64)machine_check_iSeries, /* 0x200 Machine Check */
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(u64)data_access_iSeries, /* 0x300 Data Access */
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(u64)instruction_access_iSeries, /* 0x400 Instruction Access */
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(u64)hardware_interrupt_iSeries, /* 0x500 External */
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(u64)alignment_iSeries, /* 0x600 Alignment */
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(u64)program_check_iSeries, /* 0x700 Program Check */
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(u64)fp_unavailable_iSeries, /* 0x800 FP Unavailable */
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(u64)decrementer_iSeries, /* 0x900 Decrementer */
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(u64)trap_0a_iSeries, /* 0xa00 Trap 0A */
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(u64)trap_0b_iSeries, /* 0xb00 Trap 0B */
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(u64)system_call_iSeries, /* 0xc00 System Call */
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(u64)single_step_iSeries, /* 0xd00 Single Step */
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(u64)trap_0e_iSeries, /* 0xe00 Trap 0E */
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(u64)performance_monitor_iSeries,/* 0xf00 Performance Monitor */
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0, /* int 0x1000 */
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0, /* int 0x1010 */
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0, /* int 0x1020 CPU ctls */
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(u64)hardware_interrupt_iSeries, /* SC Ret Hdlr */
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(u64)data_access_slb_iSeries, /* 0x380 D-SLB */
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(u64)instruction_access_slb_iSeries /* 0x480 I-SLB */
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}
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};
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EXPORT_SYMBOL(itLpNaca);
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/* May be filled in by the hypervisor so cannot end up in the BSS */
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struct ItIplParmsReal xItIplParmsReal __attribute__((__section__(".data")));
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/* May be filled in by the hypervisor so cannot end up in the BSS */
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struct ItExtVpdPanel xItExtVpdPanel __attribute__((__section__(".data")));
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EXPORT_SYMBOL(xItExtVpdPanel);
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#define maxPhysicalProcessors 32
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struct IoHriProcessorVpd xIoHriProcessorVpd[maxPhysicalProcessors] = {
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{
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.xInstCacheOperandSize = 32,
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.xDataCacheOperandSize = 32,
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.xProcFreq = 50000000,
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.xTimeBaseFreq = 50000000,
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.xPVR = 0x3600
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}
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};
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/* Space for Main Store Vpd 27,200 bytes */
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/* May be filled in by the hypervisor so cannot end up in the BSS */
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u64 xMsVpd[3400] __attribute__((__section__(".data")));
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/* Space for Recovery Log Buffer */
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/* May be filled in by the hypervisor so cannot end up in the BSS */
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u64 xRecoveryLogBuffer[32] __attribute__((__section__(".data")));
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struct SpCommArea xSpCommArea = {
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.xDesc = 0xE2D7C3C2,
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.xFormat = 1,
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};
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/* The LparMap data is now located at offset 0x6000 in head.S
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* It was put there so that the HvReleaseData could address it
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* with a 32-bit offset as required by the iSeries hypervisor
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*
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* The Naca has a pointer to the ItVpdAreas. The hypervisor finds
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* the Naca via the HvReleaseData area. The HvReleaseData has the
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* offset into the Naca of the pointer to the ItVpdAreas.
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*/
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struct ItVpdAreas itVpdAreas = {
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.xSlicDesc = 0xc9a3e5c1, /* "ItVA" */
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.xSlicSize = sizeof(struct ItVpdAreas),
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.xSlicVpdEntries = ItVpdMaxEntries, /* # VPD array entries */
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.xSlicDmaEntries = ItDmaMaxEntries, /* # DMA array entries */
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.xSlicMaxLogicalProcs = NR_CPUS * 2, /* Max logical procs */
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.xSlicMaxPhysicalProcs = maxPhysicalProcessors, /* Max physical procs */
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.xSlicDmaToksOffset = offsetof(struct ItVpdAreas, xPlicDmaToks),
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.xSlicVpdAdrsOffset = offsetof(struct ItVpdAreas, xSlicVpdAdrs),
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.xSlicDmaLensOffset = offsetof(struct ItVpdAreas, xPlicDmaLens),
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.xSlicVpdLensOffset = offsetof(struct ItVpdAreas, xSlicVpdLens),
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.xSlicMaxSlotLabels = 0, /* max slot labels */
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.xSlicMaxLpQueues = 1, /* max LP queues */
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.xPlicDmaLens = { 0 }, /* DMA lengths */
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.xPlicDmaToks = { 0 }, /* DMA tokens */
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.xSlicVpdLens = { /* VPD lengths */
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0,0,0, /* 0 - 2 */
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sizeof(xItExtVpdPanel), /* 3 Extended VPD */
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sizeof(struct paca_struct), /* 4 length of Paca */
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0, /* 5 */
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sizeof(struct ItIplParmsReal),/* 6 length of IPL parms */
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26992, /* 7 length of MS VPD */
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0, /* 8 */
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sizeof(struct ItLpNaca),/* 9 length of LP Naca */
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0, /* 10 */
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256, /* 11 length of Recovery Log Buf */
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sizeof(struct SpCommArea), /* 12 length of SP Comm Area */
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0,0,0, /* 13 - 15 */
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sizeof(struct IoHriProcessorVpd),/* 16 length of Proc Vpd */
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0,0,0,0,0,0, /* 17 - 22 */
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sizeof(struct hvlpevent_queue), /* 23 length of Lp Queue */
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0,0 /* 24 - 25 */
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},
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.xSlicVpdAdrs = { /* VPD addresses */
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0,0,0, /* 0 - 2 */
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&xItExtVpdPanel, /* 3 Extended VPD */
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&paca[0], /* 4 first Paca */
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0, /* 5 */
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&xItIplParmsReal, /* 6 IPL parms */
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&xMsVpd, /* 7 MS Vpd */
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0, /* 8 */
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&itLpNaca, /* 9 LpNaca */
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0, /* 10 */
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&xRecoveryLogBuffer, /* 11 Recovery Log Buffer */
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&xSpCommArea, /* 12 SP Comm Area */
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0,0,0, /* 13 - 15 */
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&xIoHriProcessorVpd, /* 16 Proc Vpd */
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0,0,0,0,0,0, /* 17 - 22 */
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&hvlpevent_queue, /* 23 Lp Queue */
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0,0
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}
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};
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struct msChunks msChunks;
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EXPORT_SYMBOL(msChunks);
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/* Depending on whether this is called from iSeries or pSeries setup
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* code, the location of the msChunks struct may or may not have
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* to be reloc'd, so we force the caller to do that for us by passing
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* in a pointer to the structure.
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*/
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unsigned long
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msChunks_alloc(unsigned long mem, unsigned long num_chunks, unsigned long chunk_size)
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{
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unsigned long offset = reloc_offset();
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struct msChunks *_msChunks = PTRRELOC(&msChunks);
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_msChunks->num_chunks = num_chunks;
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_msChunks->chunk_size = chunk_size;
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_msChunks->chunk_shift = __ilog2(chunk_size);
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_msChunks->chunk_mask = (1UL<<_msChunks->chunk_shift)-1;
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mem = _ALIGN(mem, sizeof(msChunks_entry));
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_msChunks->abs = (msChunks_entry *)(mem + offset);
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mem += num_chunks * sizeof(msChunks_entry);
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return mem;
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}
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