mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
170 lines
4.8 KiB
C
170 lines
4.8 KiB
C
/*
|
|
* Definitions for Sun3 custom MMU.
|
|
*/
|
|
#ifndef __SUN3_MMU_H__
|
|
#define __SUN3_MMU_H__
|
|
|
|
#include <asm/movs.h>
|
|
#include <asm/sun3-head.h>
|
|
|
|
/* MMU characteristics. */
|
|
#define SUN3_SEGMAPS_PER_CONTEXT 2048
|
|
#define SUN3_PMEGS_NUM 256
|
|
#define SUN3_CONTEXTS_NUM 8
|
|
|
|
#define SUN3_PMEG_SIZE_BITS 17
|
|
#define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS)
|
|
#define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1)
|
|
|
|
#define SUN3_PTE_SIZE_BITS 13
|
|
#define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS)
|
|
#define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1)
|
|
|
|
#define SUN3_CONTROL_MASK (0x0FFFFFFC)
|
|
#define SUN3_INVALID_PMEG 255
|
|
#define SUN3_INVALID_CONTEXT 255
|
|
|
|
#define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */
|
|
#define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */
|
|
#define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */
|
|
#define AC_CONTEXT 0x30000000 /* 34c current mmu-context */
|
|
#define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/
|
|
#define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */
|
|
#define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */
|
|
#define AC_SYNC_ERR 0x60000000 /* c fault type */
|
|
#define AC_SYNC_VA 0x60000004 /* c fault virtual address */
|
|
#define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */
|
|
#define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */
|
|
#define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */
|
|
#define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */
|
|
#define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */
|
|
#define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */
|
|
#define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */
|
|
#define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/
|
|
|
|
#define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
|
|
| SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED)
|
|
|
|
/* Bus access type within PTE. */
|
|
#define SUN3_PAGE_TYPE_MASK (0x0c000000)
|
|
#define SUN3_PAGE_TYPE_MEMORY (0x00000000)
|
|
#define SUN3_PAGE_TYPE_IO (0x04000000)
|
|
#define SUN3_PAGE_TYPE_VME16 (0x08000000)
|
|
#define SUN3_PAGE_TYPE_VME32 (0x0c000000)
|
|
|
|
/* Mask for page number within PTE. */
|
|
#define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)
|
|
|
|
/* Bits within bus-error register. */
|
|
#define SUN3_BUSERR_WATCHDOG (0x01)
|
|
#define SUN3_BUSERR_unused (0x02)
|
|
#define SUN3_BUSERR_FPAENERR (0x04)
|
|
#define SUN3_BUSERR_FPABERR (0x08)
|
|
#define SUN3_BUSERR_VMEBERR (0x10)
|
|
#define SUN3_BUSERR_TIMEOUT (0x20)
|
|
#define SUN3_BUSERR_PROTERR (0x40)
|
|
#define SUN3_BUSERR_INVALID (0x80)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/* Read bus error status register (implicitly clearing it). */
|
|
static inline unsigned char sun3_get_buserr(void)
|
|
{
|
|
unsigned char sfc, c;
|
|
|
|
GET_SFC (sfc);
|
|
SET_SFC (FC_CONTROL);
|
|
GET_CONTROL_BYTE (AC_BUS_ERROR, c);
|
|
SET_SFC (sfc);
|
|
|
|
return c;
|
|
}
|
|
|
|
/* Read segmap from hardware MMU. */
|
|
static inline unsigned long sun3_get_segmap(unsigned long addr)
|
|
{
|
|
register unsigned long entry;
|
|
unsigned char c, sfc;
|
|
|
|
GET_SFC (sfc);
|
|
SET_SFC (FC_CONTROL);
|
|
GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c);
|
|
SET_SFC (sfc);
|
|
entry = c;
|
|
|
|
return entry;
|
|
}
|
|
|
|
/* Write segmap to hardware MMU. */
|
|
static inline void sun3_put_segmap(unsigned long addr, unsigned long entry)
|
|
{
|
|
unsigned char sfc;
|
|
|
|
GET_DFC (sfc);
|
|
SET_DFC (FC_CONTROL);
|
|
SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry);
|
|
SET_DFC (sfc);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Read PTE from hardware MMU. */
|
|
static inline unsigned long sun3_get_pte(unsigned long addr)
|
|
{
|
|
register unsigned long entry;
|
|
unsigned char sfc;
|
|
|
|
GET_SFC (sfc);
|
|
SET_SFC (FC_CONTROL);
|
|
GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
|
|
SET_SFC (sfc);
|
|
|
|
return entry;
|
|
}
|
|
|
|
/* Write PTE to hardware MMU. */
|
|
static inline void sun3_put_pte(unsigned long addr, unsigned long entry)
|
|
{
|
|
unsigned char sfc;
|
|
|
|
GET_DFC (sfc);
|
|
SET_DFC (FC_CONTROL);
|
|
SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
|
|
SET_DFC (sfc);
|
|
|
|
return;
|
|
}
|
|
|
|
/* get current context */
|
|
static inline unsigned char sun3_get_context(void)
|
|
{
|
|
unsigned char sfc, c;
|
|
|
|
GET_SFC(sfc);
|
|
SET_SFC(FC_CONTROL);
|
|
GET_CONTROL_BYTE(AC_CONTEXT, c);
|
|
SET_SFC(sfc);
|
|
|
|
return c;
|
|
}
|
|
|
|
/* set alternate context */
|
|
static inline void sun3_put_context(unsigned char c)
|
|
{
|
|
unsigned char dfc;
|
|
GET_DFC(dfc);
|
|
SET_DFC(FC_CONTROL);
|
|
SET_CONTROL_BYTE(AC_CONTEXT, c);
|
|
SET_DFC(dfc);
|
|
|
|
return;
|
|
}
|
|
|
|
extern void *sun3_ioremap(unsigned long phys, unsigned long size,
|
|
unsigned long type);
|
|
|
|
extern int sun3_map_test(unsigned long addr, char *val);
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* !__SUN3_MMU_H__ */
|