diff options
| -rw-r--r-- | arch/xtensa/include/asm/mmu_context.h | 1 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/nommu_context.h | 4 | ||||
| -rw-r--r-- | arch/xtensa/kernel/setup.c | 10 | ||||
| -rw-r--r-- | arch/xtensa/mm/mmu.c | 30 |
4 files changed, 28 insertions, 17 deletions
diff --git a/arch/xtensa/include/asm/mmu_context.h b/arch/xtensa/include/asm/mmu_context.h index f7e186d..de5e6cb 100644 --- a/arch/xtensa/include/asm/mmu_context.h +++ b/arch/xtensa/include/asm/mmu_context.h @@ -52,6 +52,7 @@ DECLARE_PER_CPU(unsigned long, asid_cache); #define ASID_INSERT(x) (0x03020001 | (((x) & ASID_MASK) << 8)) void init_mmu(void); +void init_kio(void); static inline void set_rasid_register (unsigned long val) { diff --git a/arch/xtensa/include/asm/nommu_context.h b/arch/xtensa/include/asm/nommu_context.h index 2cebdbb..37251b2 100644 --- a/arch/xtensa/include/asm/nommu_context.h +++ b/arch/xtensa/include/asm/nommu_context.h @@ -3,6 +3,10 @@ static inline void init_mmu(void) { } +static inline void init_kio(void) +{ +} + static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) { } diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index cf7516c..960212e 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -207,6 +207,8 @@ static int __init xtensa_dt_io_area(unsigned long node, const char *uname, /* round down to nearest 256MB boundary */ xtensa_kio_paddr &= 0xf0000000; + init_kio(); + return 1; } #else @@ -245,6 +247,10 @@ void __init early_init_devtree(void *params) void __init init_arch(bp_tag_t *bp_start) { + /* Initialize MMU. */ + + init_mmu(); + /* Parse boot parameters */ if (bp_start) @@ -262,10 +268,6 @@ void __init init_arch(bp_tag_t *bp_start) /* Early hook for platforms */ platform_init(bp_start); - - /* Initialize MMU. */ - - init_mmu(); } /* diff --git a/arch/xtensa/mm/mmu.c b/arch/xtensa/mm/mmu.c index 358d748..54c01e3 100644 --- a/arch/xtensa/mm/mmu.c +++ b/arch/xtensa/mm/mmu.c @@ -82,6 +82,23 @@ void init_mmu(void) set_itlbcfg_register(0); set_dtlbcfg_register(0); #endif + init_kio(); + local_flush_tlb_all(); + + /* Set rasid register to a known value. */ + + set_rasid_register(ASID_INSERT(ASID_USER_FIRST)); + + /* Set PTEVADDR special register to the start of the page + * table, which is in kernel mappable space (ie. not + * statically mapped). This register's value is undefined on + * reset. + */ + set_ptevaddr_register(XCHAL_PAGE_TABLE_VADDR); +} + +void init_kio(void) +{ #if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF) /* * Update the IO area mapping in case xtensa_kio_paddr has changed @@ -95,17 +112,4 @@ void init_mmu(void) write_itlb_entry(__pte(xtensa_kio_paddr + CA_BYPASS), XCHAL_KIO_BYPASS_VADDR + 6); #endif - - local_flush_tlb_all(); - - /* Set rasid register to a known value. */ - - set_rasid_register(ASID_INSERT(ASID_USER_FIRST)); - - /* Set PTEVADDR special register to the start of the page - * table, which is in kernel mappable space (ie. not - * statically mapped). This register's value is undefined on - * reset. - */ - set_ptevaddr_register(PGTABLE_START); } |
