diff options
| -rw-r--r-- | arch/sh/include/asm/ptrace.h | 19 | ||||
| -rw-r--r-- | arch/sh/include/asm/system.h | 3 | ||||
| -rw-r--r-- | arch/sh/include/asm/system_64.h | 1 | ||||
| -rw-r--r-- | arch/sh/mm/Kconfig | 5 | ||||
| -rw-r--r-- | arch/sh/mm/init.c | 11 |
5 files changed, 29 insertions, 10 deletions
diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h index 201d11ef211..e879dffa324 100644 --- a/arch/sh/include/asm/ptrace.h +++ b/arch/sh/include/asm/ptrace.h @@ -102,13 +102,15 @@ struct pt_dspregs { #define PTRACE_GETDSPREGS 55 /* DSP registers */ #define PTRACE_SETDSPREGS 56 -#define PT_TEXT_END_ADDR 240 -#define PT_TEXT_ADDR 244 /* &(struct user)->start_code */ -#define PT_DATA_ADDR 248 /* &(struct user)->start_data */ +#define PT_TEXT_END_ADDR 240 +#define PT_TEXT_ADDR 244 /* &(struct user)->start_code */ +#define PT_DATA_ADDR 248 /* &(struct user)->start_data */ #define PT_TEXT_LEN 252 #ifdef __KERNEL__ #include <asm/addrspace.h> +#include <asm/page.h> +#include <asm/system.h> #define user_mode(regs) (((regs)->sr & 0x40000000)==0) #define instruction_pointer(regs) ((unsigned long)(regs)->pc) @@ -137,9 +139,14 @@ static inline unsigned long profile_pc(struct pt_regs *regs) { unsigned long pc = instruction_pointer(regs); -#ifdef P2SEG - if (pc >= P2SEG && pc < P3SEG) - pc -= 0x20000000; +#ifdef CONFIG_UNCACHED_MAPPING + /* + * If PC points in to the uncached mapping, fix it up and hand + * back the cached equivalent. + */ + if ((pc >= (memory_start + cached_to_uncached)) && + (pc < (memory_start + cached_to_uncached + uncached_size))) + pc -= cached_to_uncached; #endif return pc; diff --git a/arch/sh/include/asm/system.h b/arch/sh/include/asm/system.h index 6442f1783fe..0bd7a17d5e1 100644 --- a/arch/sh/include/asm/system.h +++ b/arch/sh/include/asm/system.h @@ -10,7 +10,6 @@ #include <linux/compiler.h> #include <linux/linkage.h> #include <asm/types.h> -#include <asm/ptrace.h> #define AT_VECTOR_SIZE_ARCH 5 /* entries in ARCH_DLINFO */ @@ -114,6 +113,8 @@ static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old, (unsigned long)_n_, sizeof(*(ptr))); \ }) +struct pt_regs; + extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn)); void free_initmem(void); void free_initrd_mem(unsigned long start, unsigned long end); diff --git a/arch/sh/include/asm/system_64.h b/arch/sh/include/asm/system_64.h index 3391bb6b21d..36338646dfc 100644 --- a/arch/sh/include/asm/system_64.h +++ b/arch/sh/include/asm/system_64.h @@ -18,6 +18,7 @@ /* * switch_to() should switch tasks to task nr n, first */ +struct thread_struct; struct task_struct *sh64_switch_to(struct task_struct *prev, struct thread_struct *prev_thread, struct task_struct *next, diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index b89075256b7..65cb5b83e07 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -75,6 +75,7 @@ config MEMORY_SIZE config 29BIT def_bool !32BIT depends on SUPERH32 + select UNCACHED_MAPPING config 32BIT bool @@ -84,6 +85,7 @@ config PMB bool "Support 32-bit physical addressing through PMB" depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP select 32BIT + select UNCACHED_MAPPING help If you say Y here, physical addressing will be extended to 32-bits through the SH-4A PMB. If this is not set, legacy @@ -173,6 +175,9 @@ config IOREMAP_FIXED def_bool y depends on X2TLB || SUPERH64 +config UNCACHED_MAPPING + bool + choice prompt "Kernel page size" default PAGE_SIZE_4KB diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index dffa6c74948..58012b6bbe7 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -21,11 +21,12 @@ #include <asm/cacheflush.h> #include <asm/sections.h> #include <asm/cache.h> +#include <asm/sizes.h> DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); pgd_t swapper_pg_dir[PTRS_PER_PGD]; -#ifdef CONFIG_SUPERH32 +#ifdef CONFIG_UNCACHED_MAPPING /* * This is the offset of the uncached section from its cached alias. * @@ -36,8 +37,8 @@ pgd_t swapper_pg_dir[PTRS_PER_PGD]; * Default value only valid in 29 bit mode, in 32bit mode this will be * updated by the early PMB initialization code. */ -unsigned long cached_to_uncached = P2SEG - P1SEG; -unsigned long uncached_size = 0x20000000; +unsigned long cached_to_uncached = 0x20000000; +unsigned long uncached_size = SZ_512M; #endif #ifdef CONFIG_MMU @@ -281,7 +282,9 @@ void __init mem_init(void) #endif " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" " lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n" +#ifdef CONFIG_UNCACHED_MAPPING " : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n" +#endif " .init : 0x%08lx - 0x%08lx (%4ld kB)\n" " .data : 0x%08lx - 0x%08lx (%4ld kB)\n" " .text : 0x%08lx - 0x%08lx (%4ld kB)\n", @@ -299,9 +302,11 @@ void __init mem_init(void) (unsigned long)memory_start, (unsigned long)high_memory, ((unsigned long)high_memory - (unsigned long)memory_start) >> 20, +#ifdef CONFIG_UNCACHED_MAPPING (unsigned long)memory_start + cached_to_uncached, (unsigned long)memory_start + cached_to_uncached + uncached_size, uncached_size >> 20, +#endif (unsigned long)&__init_begin, (unsigned long)&__init_end, ((unsigned long)&__init_end - |