diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2006-12-26 15:29:19 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2007-02-13 10:54:44 +0900 |
| commit | 7a847f819063b80cc5b38d39e8aad4d60f6ca2fd (patch) | |
| tree | f60ac00a1860d188e83f31883df7be807e500bff | |
| parent | aa4a5db52a440d32eab134bfb79d2c9af71eedb4 (diff) | |
sh: More tidying for large base pages.
There were a few more things that needed fixing up, namely THREAD_SIZE
and the TLB miss handler where certain PTRS_PER_PGD == PTRS_PER_PTE
assumptions were being made.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| -rw-r--r-- | arch/sh/Kconfig | 2 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/sh3/entry.S | 10 | ||||
| -rw-r--r-- | include/asm-sh/pgtable.h | 4 | ||||
| -rw-r--r-- | include/asm-sh/thread_info.h | 16 |
4 files changed, 19 insertions, 13 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 4f3891215b8..04cbc88e9b9 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -596,6 +596,8 @@ menu "Boot options" config ZERO_PAGE_OFFSET hex "Zero page offset" default "0x00004000" if SH_MPC1211 || SH_SH03 + default "0x00010000" if PAGE_SIZE_64KB + default "0x00002000" if PAGE_SIZE_8KB default "0x00001000" help This sets the default offset of zero page. diff --git a/arch/sh/kernel/cpu/sh3/entry.S b/arch/sh/kernel/cpu/sh3/entry.S index 014ac37ca16..1c520358ba9 100644 --- a/arch/sh/kernel/cpu/sh3/entry.S +++ b/arch/sh/kernel/cpu/sh3/entry.S @@ -332,12 +332,6 @@ general_exception: ! ! -/* This code makes some assumptions to improve performance. - * Make sure they are stil true. */ -#if PTRS_PER_PGD != PTRS_PER_PTE -#error PGD and PTE sizes don't match -#endif - /* gas doesn't flag impossible values for mov #immediate as an error */ #if (_PAGE_PRESENT >> 2) > 0x7f #error cannot load PAGE_PRESENT as an immediate @@ -399,6 +393,7 @@ tlb_miss: bt 20f ! 110 BR + mov.w 3f, k3 ! 8 LS (latency=2) (PTRS_PER_PTE-1) << 2 and k3, k0 ! 78 EX mov.w 5f, k4 ! 8 LS (latency=2) _PAGE_PRESENT @@ -491,8 +486,9 @@ tlb_miss: .align 5 ! Once cache line if possible... 1: .long swapper_pg_dir +3: .short (PTRS_PER_PTE-1) << 2 4: .short (PTRS_PER_PGD-1) << 2 -5: .short _PAGE_PRESENT +5: .long _PAGE_PRESENT 7: .long _PAGE_FLAGS_HARDWARE_MASK 8: .long MMU_PTEH #ifdef COUNT_EXCEPTIONS diff --git a/include/asm-sh/pgtable.h b/include/asm-sh/pgtable.h index 036ca284386..eba14184baf 100644 --- a/include/asm-sh/pgtable.h +++ b/include/asm-sh/pgtable.h @@ -47,13 +47,13 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define PGDIR_MASK (~(PGDIR_SIZE-1)) /* Entries per level */ -#define PTRS_PER_PTE (PAGE_SIZE / 4) +#define PTRS_PER_PTE (PAGE_SIZE / (1 << PTE_MAGNITUDE)) #define PTRS_PER_PGD (PAGE_SIZE / 4) #define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE) #define FIRST_USER_ADDRESS 0 -#define PTE_PHYS_MASK 0x1ffff000 +#define PTE_PHYS_MASK (0x20000000 - PAGE_SIZE) /* * First 1MB map is used by fixed purpose. diff --git a/include/asm-sh/thread_info.h b/include/asm-sh/thread_info.h index 879f741105d..279e70a77c7 100644 --- a/include/asm-sh/thread_info.h +++ b/include/asm-sh/thread_info.h @@ -32,12 +32,20 @@ struct thread_info { #define PREEMPT_ACTIVE 0x10000000 -#ifdef CONFIG_4KSTACKS -#define THREAD_SIZE (PAGE_SIZE) +#if defined(CONFIG_4KSTACKS) +#define THREAD_SIZE_ORDER (0) +#elif defined(CONFIG_PAGE_SIZE_4KB) +#define THREAD_SIZE_ORDER (1) +#elif defined(CONFIG_PAGE_SIZE_8KB) +#define THREAD_SIZE_ORDER (1) +#elif defined(CONFIG_PAGE_SIZE_64KB) +#define THREAD_SIZE_ORDER (0) #else -#define THREAD_SIZE (PAGE_SIZE * 2) +#error "Unknown thread size" #endif -#define STACK_WARN (THREAD_SIZE / 8) + +#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) +#define STACK_WARN (THREAD_SIZE >> 3) /* * macros/functions for gaining access to the thread information structure |