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authorStephen Rothwell <sfr@canb.auug.org.au>2005-08-16 23:01:50 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-17 00:06:25 -0400
commit2ad56496627630ebc99f06af5f81ca23e17e014e (patch)
treed5a7aecdd1d6d16f488a2b029ff55e5a132c8f1a
parentda5ca008933b3b28303ba44d0be3372fbac7748b (diff)
[PATCH] iSeries build with newer assemblers and compilers
Paulus suggested that we put xLparMap in its own .c file so that we can generate a .s file to be included into head.S. This doesn't get around the problem of having it at a fixed address, but it makes it more palatable. It would be good if this could be included in 2.6.13 as it solves our build problems with various versions of binutils and gcc. In particular, it allows us to build an iSeries kernel on Debian unstable using their biarch compiler. This has been built and booted on iSeries and built for pSeries and g5. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/ppc64/kernel/LparData.c79
-rw-r--r--arch/ppc64/kernel/Makefile5
-rw-r--r--arch/ppc64/kernel/head.S6
-rw-r--r--arch/ppc64/kernel/lparmap.c31
-rw-r--r--include/asm-ppc64/iSeries/LparMap.h9
5 files changed, 51 insertions, 79 deletions
diff --git a/arch/ppc64/kernel/LparData.c b/arch/ppc64/kernel/LparData.c
index 76cfd1449d52..1c11031c838e 100644
--- a/arch/ppc64/kernel/LparData.c
+++ b/arch/ppc64/kernel/LparData.c
@@ -32,32 +32,12 @@
32/* The HvReleaseData is the root of the information shared between 32/* The HvReleaseData is the root of the information shared between
33 * the hypervisor and Linux. 33 * the hypervisor and Linux.
34 */ 34 */
35
36/*
37 * WARNING - magic here
38 *
39 * Ok, this is a horrid hack below, but marginally better than the
40 * alternatives. What we really want is just to initialize
41 * hvReleaseData in C as in the #if 0 section here. However, gcc
42 * refuses to believe that (u32)&x is a constant expression, so will
43 * not allow the xMsNucDataOffset field to be properly initialized.
44 * So, we declare hvReleaseData in inline asm instead. We use inline
45 * asm, rather than a .S file, because the assembler won't generate
46 * the necessary relocation for the LparMap either, unless that symbol
47 * is declared in the same source file. Finally, we put the asm in a
48 * dummy, attribute-used function, instead of at file scope, because
49 * file scope asms don't allow contraints. We want to use the "i"
50 * constraints to put sizeof() and offsetof() expressions in there,
51 * because including asm/offsets.h in C code then stringifying causes
52 * all manner of warnings.
53 */
54#if 0
55struct HvReleaseData hvReleaseData = { 35struct HvReleaseData hvReleaseData = {
56 .xDesc = 0xc8a5d9c4, /* "HvRD" ebcdic */ 36 .xDesc = 0xc8a5d9c4, /* "HvRD" ebcdic */
57 .xSize = sizeof(struct HvReleaseData), 37 .xSize = sizeof(struct HvReleaseData),
58 .xVpdAreasPtrOffset = offsetof(struct naca_struct, xItVpdAreas), 38 .xVpdAreasPtrOffset = offsetof(struct naca_struct, xItVpdAreas),
59 .xSlicNacaAddr = &naca, /* 64-bit Naca address */ 39 .xSlicNacaAddr = &naca, /* 64-bit Naca address */
60 .xMsNucDataOffset = (u32)((unsigned long)&xLparMap - KERNELBASE), 40 .xMsNucDataOffset = LPARMAP_PHYS,
61 .xFlags = HVREL_TAGSINACTIVE /* tags inactive */ 41 .xFlags = HVREL_TAGSINACTIVE /* tags inactive */
62 /* 64 bit */ 42 /* 64 bit */
63 /* shared processors */ 43 /* shared processors */
@@ -70,63 +50,6 @@ struct HvReleaseData hvReleaseData = {
70 0xa7, 0x40, 0xf2, 0x4b, 50 0xa7, 0x40, 0xf2, 0x4b,
71 0xf4, 0x4b, 0xf6, 0xf4 }, 51 0xf4, 0x4b, 0xf6, 0xf4 },
72}; 52};
73#endif
74
75
76extern struct HvReleaseData hvReleaseData;
77
78static void __attribute_used__ hvReleaseData_wrapper(void)
79{
80 /* This doesn't appear to need any alignment (even 4 byte) */
81 asm volatile (
82 " lparMapPhys = xLparMap - %3\n"
83 " .data\n"
84 " .globl hvReleaseData\n"
85 "hvReleaseData:\n"
86 " .long 0xc8a5d9c4\n" /* xDesc */
87 /* "HvRD" in ebcdic */
88 " .short %0\n" /* xSize */
89 " .short %1\n" /* xVpdAreasPtrOffset */
90 " .llong naca\n" /* xSlicNacaAddr */
91 " .long lparMapPhys\n" /* xMsNucDataOffset */
92 " .long 0\n" /* xRsvd1 */
93 " .short %2\n" /* xFlags */
94 " .short 4\n" /* xVrmIndex - v5r2m0 */
95 " .short 3\n" /* xMinSupportedPlicVrmIndex - v5r1m0 */
96 " .short 3\n" /* xMinCompatablePlicVrmIndex - v5r1m0 */
97 " .long 0xd38995a4\n" /* xVrmName */
98 " .long 0xa740f24b\n" /* "Linux 2.4.64" ebcdic */
99 " .long 0xf44bf6f4\n"
100 " . = hvReleaseData + %0\n"
101 " .previous\n"
102 : : "i"(sizeof(hvReleaseData)),
103 "i"(offsetof(struct naca_struct, xItVpdAreas)),
104 "i"(HVREL_TAGSINACTIVE /* tags inactive, 64 bit, */
105 /* shared processors, HMT allowed */
106 | 6), /* TEMP: This allows non-GA drivers */
107 "i"(KERNELBASE)
108 );
109}
110
111struct LparMap __attribute__((aligned (16))) xLparMap = {
112 .xNumberEsids = HvEsidsToMap,
113 .xNumberRanges = HvRangesToMap,
114 .xSegmentTableOffs = STAB0_PAGE,
115
116 .xEsids = {
117 { .xKernelEsid = GET_ESID(KERNELBASE),
118 .xKernelVsid = KERNEL_VSID(KERNELBASE), },
119 { .xKernelEsid = GET_ESID(VMALLOCBASE),
120 .xKernelVsid = KERNEL_VSID(VMALLOCBASE), },
121 },
122
123 .xRanges = {
124 { .xPages = HvPagesToMap,
125 .xOffset = 0,
126 .xVPN = KERNEL_VSID(KERNELBASE) << (SID_SHIFT - PAGE_SHIFT),
127 },
128 },
129};
130 53
131extern void system_reset_iSeries(void); 54extern void system_reset_iSeries(void);
132extern void machine_check_iSeries(void); 55extern void machine_check_iSeries(void);
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index d9b2660ef221..2ecccb6b4f8c 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -73,3 +73,8 @@ obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
73obj-$(CONFIG_KPROBES) += kprobes.o 73obj-$(CONFIG_KPROBES) += kprobes.o
74 74
75CFLAGS_ioctl32.o += -Ifs/ 75CFLAGS_ioctl32.o += -Ifs/
76
77ifeq ($(CONFIG_PPC_ISERIES),y)
78arch/ppc64/kernel/head.o: arch/ppc64/kernel/lparmap.s
79AFLAGS_head.o += -Iarch/ppc64/kernel
80endif
diff --git a/arch/ppc64/kernel/head.S b/arch/ppc64/kernel/head.S
index 784f56d4684c..accaa052d31f 100644
--- a/arch/ppc64/kernel/head.S
+++ b/arch/ppc64/kernel/head.S
@@ -38,6 +38,7 @@
38#include <asm/cputable.h> 38#include <asm/cputable.h>
39#include <asm/setup.h> 39#include <asm/setup.h>
40#include <asm/hvcall.h> 40#include <asm/hvcall.h>
41#include <asm/iSeries/LparMap.h>
41 42
42#ifdef CONFIG_PPC_ISERIES 43#ifdef CONFIG_PPC_ISERIES
43#define DO_SOFT_DISABLE 44#define DO_SOFT_DISABLE
@@ -679,6 +680,11 @@ hardware_interrupt_iSeries_masked:
679 .globl fwnmi_data_area 680 .globl fwnmi_data_area
680fwnmi_data_area: 681fwnmi_data_area:
681 682
683#ifdef CONFIG_PPC_ISERIES
684 . = LPARMAP_PHYS
685#include "lparmap.s"
686#endif /* CONFIG_PPC_ISERIES */
687
682/* 688/*
683 * Vectors for the FWNMI option. Share common code. 689 * Vectors for the FWNMI option. Share common code.
684 */ 690 */
diff --git a/arch/ppc64/kernel/lparmap.c b/arch/ppc64/kernel/lparmap.c
new file mode 100644
index 000000000000..b81de286df5e
--- /dev/null
+++ b/arch/ppc64/kernel/lparmap.c
@@ -0,0 +1,31 @@
1/*
2 * Copyright (C) 2005 Stephen Rothwell IBM Corp.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9#include <asm/mmu.h>
10#include <asm/page.h>
11#include <asm/iSeries/LparMap.h>
12
13const struct LparMap __attribute__((__section__(".text"))) xLparMap = {
14 .xNumberEsids = HvEsidsToMap,
15 .xNumberRanges = HvRangesToMap,
16 .xSegmentTableOffs = STAB0_PAGE,
17
18 .xEsids = {
19 { .xKernelEsid = GET_ESID(KERNELBASE),
20 .xKernelVsid = KERNEL_VSID(KERNELBASE), },
21 { .xKernelEsid = GET_ESID(VMALLOCBASE),
22 .xKernelVsid = KERNEL_VSID(VMALLOCBASE), },
23 },
24
25 .xRanges = {
26 { .xPages = HvPagesToMap,
27 .xOffset = 0,
28 .xVPN = KERNEL_VSID(KERNELBASE) << (SID_SHIFT - PAGE_SHIFT),
29 },
30 },
31};
diff --git a/include/asm-ppc64/iSeries/LparMap.h b/include/asm-ppc64/iSeries/LparMap.h
index 5c32e38c1c01..a6840b186d03 100644
--- a/include/asm-ppc64/iSeries/LparMap.h
+++ b/include/asm-ppc64/iSeries/LparMap.h
@@ -19,6 +19,8 @@
19#ifndef _LPARMAP_H 19#ifndef _LPARMAP_H
20#define _LPARMAP_H 20#define _LPARMAP_H
21 21
22#ifndef __ASSEMBLY__
23
22#include <asm/types.h> 24#include <asm/types.h>
23 25
24/* 26/*
@@ -71,6 +73,11 @@ struct LparMap {
71 } xRanges[HvRangesToMap]; 73 } xRanges[HvRangesToMap];
72}; 74};
73 75
74extern struct LparMap xLparMap; 76extern const struct LparMap xLparMap;
77
78#endif /* __ASSEMBLY__ */
79
80/* the fixed address where the LparMap exists */
81#define LPARMAP_PHYS 0x7000
75 82
76#endif /* _LPARMAP_H */ 83#endif /* _LPARMAP_H */