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authorDavid Gibson <david@gibson.dropbear.id.au>2005-08-19 14:52:31 +1000
committerPaul Mackerras <paulus@samba.org>2005-08-29 10:53:33 +1000
commit2e2446ea0758cd57dd065962d9544e3f4d44ea2b (patch)
tree745b7fb19e2fb48265aed6eb8ee33217a9e3f22a /arch/ppc64/kernel
parent19dbd0f6a74f7529d6d49dd50ad6b31adbe0598d (diff)
[PATCH] Remove NACA fixed address constraint
Comments in head.S suggest that the iSeries naca has a fixed address, because tools expect to find it there. The only tool which appears to access the naca is addRamDisk, but both the in-kernel version and the version used in RHEL and SuSE in fact locate the NACA the same way as the hypervisor does, by following the pointer in the hvReleaseData structure. Since the requirement for a fixed address seems to be obsolete, this patch removes the naca from head.S and replaces it with a normal C initializer. For good measure, it removes an old version of addRamDisk.c which was sitting, unused, in the ppc32 tree. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel')
-rw-r--r--arch/ppc64/kernel/LparData.c11
-rw-r--r--arch/ppc64/kernel/head.S17
2 files changed, 12 insertions, 16 deletions
diff --git a/arch/ppc64/kernel/LparData.c b/arch/ppc64/kernel/LparData.c
index 1c11031c838..3b9a2600fec 100644
--- a/arch/ppc64/kernel/LparData.c
+++ b/arch/ppc64/kernel/LparData.c
@@ -51,6 +51,17 @@ struct HvReleaseData hvReleaseData = {
0xf4, 0x4b, 0xf6, 0xf4 },
};
+/*
+ * The NACA. The first dword of the naca is required by the iSeries
+ * hypervisor to point to itVpdAreas. The hypervisor finds the NACA
+ * through the pointer in hvReleaseData.
+ */
+struct naca_struct naca = {
+ .xItVpdAreas = &itVpdAreas,
+ .xRamDisk = 0,
+ .xRamDiskSize = 0,
+};
+
extern void system_reset_iSeries(void);
extern void machine_check_iSeries(void);
extern void data_access_iSeries(void);
diff --git a/arch/ppc64/kernel/head.S b/arch/ppc64/kernel/head.S
index accaa052d31..13c03648a60 100644
--- a/arch/ppc64/kernel/head.S
+++ b/arch/ppc64/kernel/head.S
@@ -30,7 +30,6 @@
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/mmu.h>
-#include <asm/naca.h>
#include <asm/systemcfg.h>
#include <asm/ppc_asm.h>
#include <asm/offsets.h>
@@ -511,24 +510,10 @@ _GLOBAL(do_stab_bolted_pSeries)
mfspr r12,SPRG2
EXCEPTION_PROLOG_PSERIES(PACA_EXSLB, .do_stab_bolted)
-
- /* Space for the naca. Architected to be located at real address
- * NACA_PHYS_ADDR. Various tools rely on this location being fixed.
- * The first dword of the naca is required by iSeries LPAR to
- * point to itVpdAreas. On pSeries native, this value is not used.
- */
- . = NACA_PHYS_ADDR
- .globl __end_interrupts
-__end_interrupts:
-#ifdef CONFIG_PPC_ISERIES
- .globl naca
-naca:
- .llong itVpdAreas
- .llong 0 /* xRamDisk */
- .llong 0 /* xRamDiskSize */
. = 0x6100
+#ifdef CONFIG_PPC_ISERIES
/*** ISeries-LPAR interrupt handlers ***/
STD_EXCEPTION_ISERIES(0x200, machine_check, PACA_EXMC)