Re: [v2][PATCH 1/7] powerpc/book3e: support CONFIG_RELOCATABLE

[tiejun.chen]

On 07/02/2013 01:00 PM, Bhushan Bharat-R65777 wrote:

-----Original Message-----
From: Linuxppc-dev [mailto:linuxppc-dev-
bounces+bharat.bhushan=freescale....@lists.ozlabs.org] On Behalf Of Tiejun Chen
Sent: Thursday, June 20, 2013 1:23 PM
To: b...@kernel.crashing.org
Cc: linuxppc-...@lists.ozlabs.org; linux-kernel@vger.kernel.org
Subject: [v2][PATCH 1/7] powerpc/book3e: support CONFIG_RELOCATABLE

book3e is different with book3s since 3s includes the exception
vectors code in head_64.S as it relies on absolute addressing
which is only possible within this compilation unit. So we have
to get that label address with got.

And when boot a relocated kernel, we should reset ipvr properly again
after .relocate.

Signed-off-by: Tiejun Chen <tiejun.c...@windriver.com>
---

[snip]

        int *src, *dest;
        unsigned long length;
+#ifdef CONFIG_PPC_BOOK3E
+       extern char interrupt_end_book3e[];
+#endif

Cannot we do this in arch/powerpc/kernel/asm/sections.h

        if (PHYSICAL_START == 0)
                return;

        src = (int *)(KERNELBASE + PHYSICAL_START);
        dest = (int *)KERNELBASE;
+#ifdef CONFIG_PPC_BOOK3E
+       length = (interrupt_end_book3e - _stext) / sizeof(int);
+#else
        length = (__end_interrupts - _stext) / sizeof(int);
+#endif

can we keep same name in books and booke; __end_interrupts ? this way we can 
avoid such #ifdefs

Yes, I think I can simplify this as you pointed :)

Thanks,

Tiejun
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