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powerpc/book3e: support CONFIG_RELOCATABLE

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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.chen@windriver.com>
[scottwood: cleanup and ifdef removal]
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Tiejun Chen
2015-10-06 22:48:15 -05:00
committed by Scott Wood
parent 835c031c98
commit 1cb6e06492
3 changed files with 28 additions and 7 deletions
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9
arch/powerpc/kernel/exceptions-64e.S
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@@ -1351,7 +1351,10 @@ skpinv: addi r6,r6,1 /* Increment */
* r4 = MAS0 w/TLBSEL & ESEL for the temp mapping
*/
/* Now we branch the new virtual address mapped by this entry */
LOAD_REG_IMMEDIATE(r6,2f)
bl 1f /* Find our address */
1: mflr r6
addi r6,r6,(2f - 1b)
tovirt(r6,r6)
lis r7,MSR_KERNEL@h
ori r7,r7,MSR_KERNEL@l
mtspr SPRN_SRR0,r6
@@ -1583,9 +1586,11 @@ _GLOBAL(book3e_secondary_thread_init)
mflr r28
b 3b
.globl init_core_book3e
init_core_book3e:
/* Establish the interrupt vector base */
LOAD_REG_IMMEDIATE(r3, interrupt_base_book3e)
tovirt(r2,r2)
LOAD_REG_ADDR(r3, interrupt_base_book3e)
mtspr SPRN_IVPR,r3
sync
blr