From 84493804bbbc10291492661440728668b2b06abe Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sun, 6 Mar 2011 18:09:07 +0000 Subject: [PATCH] powerpc/mm: Move the STAB0 location to 0x8000 to make room in low memory Recent upstream builds with allmodconfig fail due to lack of space between 0x3000 and 0x6000. We have a hard block at 0x7000 but we can spare a page by moving the STAB0 from 0x6000 to 0x8000. Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/mmu-hash64.h | 2 +- arch/powerpc/kernel/exceptions-64s.S | 28 +++++++++++++-------------- 2 files changed, 15 insertions(+), 15 deletions(-) diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h index acac35d5b382..ae7b3efec8e5 100644 --- a/arch/powerpc/include/asm/mmu-hash64.h +++ b/arch/powerpc/include/asm/mmu-hash64.h @@ -27,7 +27,7 @@ #define STE_VSID_SHIFT 12 /* Location of cpu0's segment table */ -#define STAB0_PAGE 0x6 +#define STAB0_PAGE 0x8 #define STAB0_OFFSET (STAB0_PAGE << 12) #define STAB0_PHYS_ADDR (STAB0_OFFSET + PHYSICAL_START) diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 8a817995b4cd..c532cb2c927a 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -977,20 +977,6 @@ _GLOBAL(do_stab_bolted) rfid b . /* prevent speculative execution */ -/* - * 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 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). - */ - . = STAB0_OFFSET /* 0x6000 */ - .globl initial_stab -initial_stab: - .space 4096 - #ifdef CONFIG_PPC_PSERIES /* * Data area reserved for FWNMI option. @@ -1027,3 +1013,17 @@ xLparMap: #ifdef CONFIG_PPC_PSERIES . = 0x8000 #endif /* CONFIG_PPC_PSERIES */ + +/* + * 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 given to the hv + * as a page number (see xLparMap above), so this must be at a + * fixed address (the linker can't compute (u64)&initial_stab >> + * PAGE_SHIFT). + */ + . = STAB0_OFFSET /* 0x8000 */ + .globl initial_stab +initial_stab: + .space 4096 -- 2.20.1