[POWERPC] iSeries: Clean up lparmap mess

We need to have xLparMap in head_64.S so that it is at a fixed address
(because the linker will not resolve (address & 0xffffffff) for us).
But the assembler miscalculates the KERNEL_VSID() expressions.  So put
the confusing expressions into asm-offsets.c.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

6 files changed, 31 insertions, 48 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index a4850dd8764f..967afc517d8f 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -80,13 +80,6 @@ ifneq ($(CONFIG_PPC_INDIRECT_IO),y)
 obj-y                           += iomap.o
 endif
 
-ifeq ($(CONFIG_PPC_ISERIES),y)
-CFLAGS_lparmap.s                += -g0
-extra-y += lparmap.s
-$(obj)/head_64.o:       $(obj)/lparmap.s
-AFLAGS_head_64.o += -I$(obj)
-endif
-
 else
 # stuff used from here for ARCH=ppc
 smpobj-$(CONFIG_SMP)            += smp.o
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 2cb1d9487796..a40805328f9b 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -312,5 +312,13 @@ int main(void)
 #ifdef CONFIG_BUG
         DEFINE(BUG_ENTRY_SIZE, sizeof(struct bug_entry));
 #endif
+
+#ifdef CONFIG_PPC_ISERIES
+        /* the assembler miscalculates the VSID values */
+        DEFINE(PAGE_OFFSET_ESID, GET_ESID(PAGE_OFFSET));
+        DEFINE(PAGE_OFFSET_VSID, KERNEL_VSID(PAGE_OFFSET));
+        DEFINE(VMALLOC_START_ESID, GET_ESID(VMALLOC_START));
+        DEFINE(VMALLOC_START_VSID, KERNEL_VSID(VMALLOC_START));
+#endif
         return 0;
 }
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 171800002ede..1e6d9cc06ca0 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -34,6 +34,7 @@
 #include <asm/iseries/lpar_map.h>
 #include <asm/thread_info.h>
 #include <asm/firmware.h>
+#include <asm/page_64.h>
 
 #define DO_SOFT_DISABLE
 
@@ -1519,8 +1520,8 @@ _GLOBAL(do_stab_bolted)
  * Space for CPU0's segment table.
  *
  * On iSeries, the hypervisor must fill in at least one entry before
- * we get control (with relocate on).  The address is give to the hv
- * as a page number (see xLparMap in lpardata.c), so this must be at a
+ * we get control (with relocate on).  The address is given to the hv
+ * as a page number (see xLparMap below), so this must be at a
  * fixed address (the linker can't compute (u64)&initial_stab >>
  * PAGE_SHIFT).
  */
@@ -1542,12 +1543,22 @@ fwnmi_data_area:
          * both pSeries and iSeries */
 #ifdef CONFIG_PPC_ISERIES
         . = LPARMAP_PHYS
-#include "lparmap.s"
-/*
- * This ".text" is here for old compilers that generate a trailing
- * .note section when compiling .c files to .s
- */
-        .text
+        .globl xLparMap
+xLparMap:
+        .quad   HvEsidsToMap            /* xNumberEsids */
+        .quad   HvRangesToMap           /* xNumberRanges */
+        .quad   STAB0_PAGE              /* xSegmentTableOffs */
+        .zero   40                      /* xRsvd */
+        /* xEsids (HvEsidsToMap entries of 2 quads) */
+        .quad   PAGE_OFFSET_ESID        /* xKernelEsid */
+        .quad   PAGE_OFFSET_VSID        /* xKernelVsid */
+        .quad   VMALLOC_START_ESID      /* xKernelEsid */
+        .quad   VMALLOC_START_VSID      /* xKernelVsid */
+        /* xRanges (HvRangesToMap entries of 3 quads) */
+        .quad   HvPagesToMap            /* xPages */
+        .quad   0                       /* xOffset */
+        .quad   PAGE_OFFSET_VSID << (SID_SHIFT - HW_PAGE_SHIFT) /* xVPN */
+
 #endif /* CONFIG_PPC_ISERIES */
 
         . = 0x8000
diff --git a/arch/powerpc/kernel/lparmap.c b/arch/powerpc/kernel/lparmap.c
deleted file mode 100644
index af11285ffbd1..000000000000
--- a/arch/powerpc/kernel/lparmap.c
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright (C) 2005  Stephen Rothwell  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.
- */
-#include <asm/mmu.h>
-#include <asm/pgtable.h>
-#include <asm/iseries/lpar_map.h>
-
-/* The # is to stop gcc trying to make .text nonexecutable */
-const struct LparMap __attribute__((__section__(".text #"))) xLparMap = {
-        .xNumberEsids = HvEsidsToMap,
-        .xNumberRanges = HvRangesToMap,
-        .xSegmentTableOffs = STAB0_PAGE,
-
-        .xEsids = {
-                { .xKernelEsid = GET_ESID(PAGE_OFFSET),
-                  .xKernelVsid = KERNEL_VSID(PAGE_OFFSET), },
-                { .xKernelEsid = GET_ESID(VMALLOC_START),
-                  .xKernelVsid = KERNEL_VSID(VMALLOC_START), },
-        },
-
-        .xRanges = {
-                { .xPages = HvPagesToMap,
-                  .xOffset = 0,
-                  .xVPN = KERNEL_VSID(PAGE_OFFSET) << (SID_SHIFT - HW_PAGE_SHIFT),
-                },
-        },
-};
diff --git a/include/asm-powerpc/iseries/lpar_map.h b/include/asm-powerpc/iseries/lpar_map.h
index 2ec384d66abb..5e9f3e128ee2 100644
--- a/include/asm-powerpc/iseries/lpar_map.h
+++ b/include/asm-powerpc/iseries/lpar_map.h
@@ -22,6 +22,8 @@
 
 #include <asm/types.h>
 
+#endif
+
 /*
  * The iSeries hypervisor will set up mapping for one or more
  * ESID/VSID pairs (in SLB/segment registers) and will set up
@@ -56,6 +58,7 @@
 /* Hypervisor initially maps 32MB of the load area */
 #define HvPagesToMap    8192
 
+#ifndef __ASSEMBLY__
 struct LparMap {
         u64     xNumberEsids;   // Number of ESID/VSID pairs
         u64     xNumberRanges;  // Number of VA ranges to map
diff --git a/include/asm-powerpc/page_64.h b/include/asm-powerpc/page_64.h
index 4ceb1132c480..56a2df0f6836 100644
--- a/include/asm-powerpc/page_64.h
+++ b/include/asm-powerpc/page_64.h
@@ -28,7 +28,7 @@
 
 /* Segment size */
 #define SID_SHIFT               28
-#define SID_MASK                0xfffffffffUL
+#define SID_MASK                ASM_CONST(0xfffffffff)
 #define ESID_MASK               0xfffffffff0000000UL
 #define GET_ESID(x)             (((x) >> SID_SHIFT) & SID_MASK)