diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2016-02-09 17:08:18 +0100 |
|---|---|---|
| committer | Scott Wood <oss@buserror.net> | 2016-03-11 17:20:11 -0600 |
| commit | a7761fe48993f103d6deac6037bf786bd1db0501 (patch) | |
| tree | 35566d489c8b6ce8c34541b5f048eaabd84cd691 /arch/powerpc/kernel/head_8xx.S | |
| parent | 63e9e1c28fa6fe714364c7817e60dbaed3cec95e (diff) | |
powerpc/8xx: rewrite set_context() in C
There is no real need to have set_context() in assembly.
Now that we have mtspr() handling CPU6 ERRATA directly, we
can rewrite set_context() in C language for easier maintenance.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/kernel/head_8xx.S')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 4a5e56d98bd6..80c69472314e 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -883,50 +883,6 @@ initial_mmu: /* - * Set up to use a given MMU context. - * r3 is context number, r4 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." - */ -_GLOBAL(set_context) - -#ifdef CONFIG_BDI_SWITCH - /* Context switch the PTE pointer for the Abatron BDI2000. - * The PGDIR is passed as second argument. - */ - lis r5, KERNELBASE@h - lwz r5, 0xf0(r5) - stw r4, 0x4(r5) -#endif - - /* Register M_TW 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. - */ - li r5, (swapper_pg_dir-PAGE_OFFSET)@l - sub r4, r4, r5 - tophys (r4, r4) -#ifdef CONFIG_8xx_CPU6 - lis r6, cpu6_errata_word@h - ori r6, r6, cpu6_errata_word@l - li r7, 0x3f80 - stw r7, 12(r6) - lwz r7, 12(r6) -#endif - mtspr SPRN_M_TW, r4 /* Update pointeur to level 1 table */ -#ifdef CONFIG_8xx_CPU6 - li r7, 0x3380 - stw r7, 12(r6) - lwz r7, 12(r6) -#endif - mtspr SPRN_M_CASID, r3 /* Update context */ - SYNC - blr - -/* * We put a few things here that have to be page-aligned. * This stuff goes at the beginning of the data segment, * which is page-aligned. |