lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sh: Add MMU and Cache handling sleep mode code

Browse Source 
Add MMU and cache handling functionality to the SuperH Mobile
sleep code. The MMU and cache registers are saved and restored.
The MMU is disabled and the cache is flushed and disabled before
entering sleep modes if the SUSP_SH_MMU flag is set. This flag
should be set in the case of R-standby and most likely for future
U-standby support as well.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm
2009-10-30 04:24:23 +00:00
committed by Paul Mundt
parent 02bf89347c
commit 99675a7a45
4 changed files with 132 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
arch/sh/include/asm/suspend.h
View File

@@ -38,6 +38,20 @@ void sh_mobile_register_self_refresh(unsigned long flags,
/* register structure for address/data information */
struct sh_sleep_regs {
unsigned long stbcr;
/* MMU */
unsigned long pteh;
unsigned long ptel;
unsigned long ttb;
unsigned long tea;
unsigned long mmucr;
unsigned long ptea;
unsigned long pascr;
unsigned long irmcr;
/* Cache */
unsigned long ccr;
unsigned long ramcr;
};
/* data area for low-level sleep code */
@@ -72,5 +86,6 @@ extern unsigned long sh_mobile_sleep_supported;
#define SUSP_SH_RSTANDBY (1 << 2) /* SH-Mobile R-standby mode */
#define SUSP_SH_USTANDBY (1 << 3) /* SH-Mobile U-standby mode */
#define SUSP_SH_SF (1 << 4) /* Enable self-refresh */
#define SUSP_SH_MMU (1 << 5) /* Save/restore MMU and cache */
#endif /* _ASM_SH_SUSPEND_H */