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powerpc/8xx: Define a MODULE area below kernel text

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On the 8xx, TASK_SIZE is 0x80000000. The space between TASK_SIZE
and PAGE_OFFSET is not used.

In order to benefit from the powerpc specific module_alloc()
function which allocate modules with 32 Mbytes from
end of kernel text, define MODULES_VADDR and MODULES_END.

Set a 256Mb area just below PAGE_OFFSET, like book3s/32.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/a225606d5b3a8bc53fe612ad52c855c60b0a0a58.1617283827.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2021-04-01 13:30:42 +00:00 committed by Michael Ellerman
parent 2ec13df167
commit 9132a2e82a
1 changed files with 3 additions and 0 deletions
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3
arch/powerpc/include/asm/nohash/32/mmu-8xx.h
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@ -172,6 +172,9 @@
#define mmu_linear_psize MMU_PAGE_8M
#define MODULES_VADDR (PAGE_OFFSET - SZ_256M)
#define MODULES_END PAGE_OFFSET
#ifndef __ASSEMBLY__
#include <linux/mmdebug.h>