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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-06-03 09:29:03 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-06-17 00:09:09 +1000 |
| commit | a56ab7c7290f5922363d1ee11bbafc4da2b9bf51 (patch) | |
| tree | 34a9150325d6ce1a54a2d8a68b6ff72bd2d9d52f /arch/powerpc/mm/nohash/8xx.c | |
| parent | powerpc/nohash: Refactor update of BDI2000 pointers in switch_mmu_context() (diff) | |
| download | linux-stable-a56ab7c7290f5922363d1ee11bbafc4da2b9bf51.tar.xz linux-stable-a56ab7c7290f5922363d1ee11bbafc4da2b9bf51.zip | |
powerpc/nohash: Convert set_context() to C
ppc8xx already has set_context() in C.
Other ones have it in assembly. The only thing it does is to
write the context id into SPRN_PID.
Do it in C.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/a5d0759064f3831c6b88af49ef5d3b05ba1c4dad.1622712515.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/mm/nohash/8xx.c')
| -rw-r--r-- | arch/powerpc/mm/nohash/8xx.c | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c index 4dd02bb8bd73..60780e089118 100644 --- a/arch/powerpc/mm/nohash/8xx.c +++ b/arch/powerpc/mm/nohash/8xx.c @@ -212,31 +212,6 @@ void __init setup_initial_memory_limit(phys_addr_t first_memblock_base, memblock_set_current_limit(min_t(u64, first_memblock_size, SZ_32M)); } -/* - * Set up to use a given MMU context. - * id is context number, pgd is PGD pointer. - * - * We place the physical address of the new task page directory loaded - * into the MMU base register, and set the ASID compare register with - * the new "context." - */ -void set_context(unsigned long id, pgd_t *pgd) -{ - s16 offset = (s16)(__pa(swapper_pg_dir)); - - /* Register M_TWB will contain base address of level 1 table minus the - * lower part of the kernel PGDIR base address, so that all accesses to - * level 1 table are done relative to lower part of kernel PGDIR base - * address. - */ - mtspr(SPRN_M_TWB, __pa(pgd) - offset); - - /* Update context */ - mtspr(SPRN_M_CASID, id - 1); - /* sync */ - mb(); -} - #ifdef CONFIG_PPC_KUEP void __init setup_kuep(bool disabled) { |