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| author | Paul Mundt <lethal@linux-sh.org> | 2010-02-12 15:40:00 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-02-12 15:40:00 +0900 |
| commit | b0f3ae03aca0f331b851ae94bc066124e7f104df (patch) | |
| tree | 510b641df1414800abcbe022986d5c9075017759 /arch/sh/include | |
| parent | a4dad4c75c4ae378c2a5d66938b8467802c2e98f (diff) | |
| download | op-kernel-dev-b0f3ae03aca0f331b851ae94bc066124e7f104df.zip op-kernel-dev-b0f3ae03aca0f331b851ae94bc066124e7f104df.tar.gz | |
sh: Isolate uncached mapping support.
This splits out the uncached mapping support under its own config option,
presently only used by 29-bit mode and 32-bit + PMB. This will make it
possible to optionally add an uncached mapping on sh64 as well as booting
without an uncached mapping for 32-bit.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include')
| -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 |
3 files changed, 16 insertions, 7 deletions
diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h index 201d11e..e879dff 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 6442f17..0bd7a17 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 3391bb6..3633864 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, |
