From: Tiejun Chen <tiejun.chen@xxxxxxxxxxxxx> Convert r4/r5, not r6, to a virtual address when calling copy_and_flush. Otherwise, r3 is already virtual, and copy_to_flush tries to access r3+r6, PAGE_OFFSET gets added twice. This isn't normally seen because on book3e we normally enter with the kernel at zero and thus skip copy_to_flush -- but it will be needed for kexec support. Signed-off-by: Tiejun Chen <tiejun.chen at windriver.com> [scottwood: split patch and rewrote changelog] Signed-off-by: Scott Wood <scottwood at freescale.com> --- arch/powerpc/kernel/head_64.S | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 8b2bf0d..a1e85ca 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -474,15 +474,15 @@ __after_prom_start: */ li r3,0 /* target addr */ #ifdef CONFIG_PPC_BOOK3E - tovirt(r3,r3) /* on booke, we already run at PAGE_OFFSET */ + tovirt(r3,r3) /* on booke, we already run at PAGE_OFFSET */ #endif mr. r4,r26 /* In some cases the loader may */ +#if defined(CONFIG_PPC_BOOK3E) + tovirt(r4,r4) +#endif beq 9f /* have already put us at zero */ li r6,0x100 /* Start offset, the first 0x100 */ /* bytes were copied earlier. */ -#ifdef CONFIG_PPC_BOOK3E - tovirt(r6,r6) /* on booke, we already run at PAGE_OFFSET */ -#endif #ifdef CONFIG_RELOCATABLE /* @@ -514,6 +514,9 @@ __after_prom_start: p_end: .llong _end - _stext 4: /* Now copy the rest of the kernel up to _end */ +#if defined(CONFIG_PPC_BOOK3E) + tovirt(r26,r26) +#endif addis r5,r26,(p_end - _stext)@ha ld r5,(p_end - _stext)@l(r5) /* get _end */ 5: bl copy_and_flush /* copy the rest */ -- 2.1.4
