diff options
Diffstat (limited to 'sys/arch/mvme88k')
| -rw-r--r-- | sys/arch/mvme88k/mvme88k/m88410.c | 50 |
1 files changed, 36 insertions, 14 deletions
diff --git a/sys/arch/mvme88k/mvme88k/m88410.c b/sys/arch/mvme88k/mvme88k/m88410.c index 7537f81399a..6501b77d094 100644 --- a/sys/arch/mvme88k/mvme88k/m88410.c +++ b/sys/arch/mvme88k/mvme88k/m88410.c @@ -1,4 +1,4 @@ -/* $OpenBSD: m88410.c,v 1.2 2006/05/07 17:44:28 miod Exp $ */ +/* $OpenBSD: m88410.c,v 1.3 2007/12/02 21:25:01 miod Exp $ */ /* * Copyright (c) 2001 Steve Murphree, Jr. * All rights reserved. @@ -38,10 +38,32 @@ #include <mvme88k/dev/busswreg.h> -#define XCC_NOP "0x00" -#define XCC_FLUSH_PAGE "0x01" -#define XCC_FLUSH_ALL "0x02" -#define XCC_INVAL_ALL "0x03" +/* + * MVME197-specific 88410 operation. + * + * 88410 commands are sent by writing a 64-bit word to a specific address. + * Since the 88410 is not normally mapped and shares its address range + * with the flash memory, it is necessary to program the busswitch chip + * before the 88410 command can be sent. + */ + +/* + * Flush physical page number (specified in the low 20 bits of the + * address. + */ +#define XCC_FLUSH_PAGE 0x01 +/* + * Flush the whole cache. + */ +#define XCC_FLUSH_ALL 0x02 +/* + * Invalidate the whole cache. + */ +#define XCC_INVAL_ALL 0x03 + +/* + * Base address of the 88410 when mapped. + */ #define XCC_ADDR 0xff800000 void @@ -69,9 +91,9 @@ mc88410_flush_page(paddr_t physaddr) /* send command */ __asm__ __volatile__ ( - "or r2, r0, " XCC_FLUSH_PAGE ";" - "or r3, r0, r0;" - "st.d r2, %0, 0" : : "r" (xccaddr) : "r2", "r3"); + "or r2, r0, %0\n\t" + "or r3, r0, r0\n\t" + "st.d r2, %1, 0" : : "i" (XCC_FLUSH_PAGE), "r" (xccaddr) : "r2", "r3"); /* spin until the operation is complete */ while ((*(volatile u_int32_t *)(BS_BASE + BS_XCCR) & BS_XCC_FBSY) != 0) @@ -101,9 +123,9 @@ mc88410_flush(void) /* send command */ __asm__ __volatile__ ( - "or r2, r0, " XCC_FLUSH_ALL ";" - "or r3, r0, r0;" - "st.d r2, %0, 0" : : "r" (XCC_ADDR) : "r2", "r3"); + "or r2, r0, %0\n\t" + "or r3, r0, r0\n\t" + "st.d r2, %1, 0" : : "i" (XCC_FLUSH_ALL), "r" (XCC_ADDR) : "r2", "r3"); /* spin until the operation is complete */ while ((*(volatile u_int32_t *)(BS_BASE + BS_XCCR) & BS_XCC_FBSY) != 0) @@ -131,9 +153,9 @@ mc88410_inval(void) /* send command */ __asm__ __volatile__ ( - "or r2, r0, " XCC_INVAL_ALL ";" - "or r3, r0, r0;" - "st.d r2, %0, 0" : : "r" (XCC_ADDR) : "r2", "r3"); + "or r2, r0, %0\n\t" + "or r3, r0, r0\n\t" + "st.d r2, %1, 0" : : "i" (XCC_INVAL_ALL), "r" (XCC_ADDR) : "r2", "r3"); /* * The 88410 will not let the 88110 access it until the |