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sh: Isolate uncached mapping support.

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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>
This commit is contained in:
Paul Mundt
2010-02-12 15:40:00 +09:00
parent a4dad4c75c
commit b0f3ae03ac
5 changed files with 29 additions and 10 deletions
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19
arch/sh/include/asm/ptrace.h
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@@ -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;