linux/include/asm-powerpc/reg_8xx.h
David Gibson 26ef5c0957 [PATCH] powerpc: Merge cacheflush.h and cache.h
The ppc32 and ppc64 versions of cacheflush.h were almost identical.
The two versions of cache.h are fairly similar, except for a bunch of
register definitions in the ppc32 version which probably belong better
elsewhere.  This patch, therefore, merges both headers.  Notable
points:
	- there are several functions in cacheflush.h which exist only
on ppc32 or only on ppc64.  These are handled by #ifdef for now, but
these should probably be consolidated, along with the actual code
behind them later.
	- Confusingly, both ppc32 and ppc64 have a
flush_dcache_range(), but they're subtly different: it uses dcbf on
ppc32 and dcbst on ppc64, ppc64 has a flush_inval_dcache_range() which
uses dcbf.  These too should be merged and consolidated later.
	- Also flush_dcache_range() was defined in cacheflush.h on
ppc64, and in cache.h on ppc32.  In the merged version it's in
cacheflush.h
	- On ppc32 flush_icache_range() is a normal function from
misc.S.  On ppc64, it was wrapper, testing a feature bit before
calling __flush_icache_range() which does the actual flush.  This
patch takes the ppc64 approach, which amounts to no change on ppc32,
since CPU_FTR_COHERENT_ICACHE will never be set there, but does mean
renaming flush_icache_range() to __flush_icache_range() in
arch/ppc/kernel/misc.S and arch/powerpc/kernel/misc_32.S
	- The PReP register info from asm-ppc/cache.h has moved to
arch/ppc/platforms/prep_setup.c
	- The 8xx register info from asm-ppc/cache.h has moved to a
new asm-powerpc/reg_8xx.h, included from reg.h
	- flush_dcache_all() was defined on ppc32 (only), but was
never called (although it was exported).  Thus this patch removes it
from cacheflush.h and from ARCH=powerpc (misc_32.S) entirely.  It's
left in ARCH=ppc for now, with the prototype moved to ppc_ksyms.c.

Built for Walnut (ARCH=ppc), 32-bit multiplatform (pmac, CHRP and PReP
ARCH=ppc, pmac and CHRP ARCH=powerpc).  Built and booted on POWER5
LPAR (ARCH=powerpc and ARCH=ppc64).

Built for 32-bit powermac (ARCH=ppc and ARCH=powerpc).  Built and
booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64).  Built and booted
on G5 (ARCH=powerpc)

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-10 13:09:22 +11:00

43 lines
1.6 KiB
C

/*
* Contains register definitions common to PowerPC 8xx CPUs. Notice
*/
#ifndef _ASM_POWERPC_REG_8xx_H
#define _ASM_POWERPC_REG_8xx_H
/* Cache control on the MPC8xx is provided through some additional
* special purpose registers.
*/
#define SPRN_IC_CST 560 /* Instruction cache control/status */
#define SPRN_IC_ADR 561 /* Address needed for some commands */
#define SPRN_IC_DAT 562 /* Read-only data register */
#define SPRN_DC_CST 568 /* Data cache control/status */
#define SPRN_DC_ADR 569 /* Address needed for some commands */
#define SPRN_DC_DAT 570 /* Read-only data register */
/* Commands. Only the first few are available to the instruction cache.
*/
#define IDC_ENABLE 0x02000000 /* Cache enable */
#define IDC_DISABLE 0x04000000 /* Cache disable */
#define IDC_LDLCK 0x06000000 /* Load and lock */
#define IDC_UNLINE 0x08000000 /* Unlock line */
#define IDC_UNALL 0x0a000000 /* Unlock all */
#define IDC_INVALL 0x0c000000 /* Invalidate all */
#define DC_FLINE 0x0e000000 /* Flush data cache line */
#define DC_SFWT 0x01000000 /* Set forced writethrough mode */
#define DC_CFWT 0x03000000 /* Clear forced writethrough mode */
#define DC_SLES 0x05000000 /* Set little endian swap mode */
#define DC_CLES 0x07000000 /* Clear little endian swap mode */
/* Status.
*/
#define IDC_ENABLED 0x80000000 /* Cache is enabled */
#define IDC_CERR1 0x00200000 /* Cache error 1 */
#define IDC_CERR2 0x00100000 /* Cache error 2 */
#define IDC_CERR3 0x00080000 /* Cache error 3 */
#define DC_DFWT 0x40000000 /* Data cache is forced write through */
#define DC_LES 0x20000000 /* Caches are little endian mode */
#endif /* _ASM_POWERPC_REG_8xx_H */