1/* swift.h: Specific definitions for the _broken_ Swift SRMMU
2 *          MMU module.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#ifndef _SPARC_SWIFT_H
8#define _SPARC_SWIFT_H
9
10/* Swift is so brain damaged, here is the mmu control register. */
11#define SWIFT_ST       0x00800000   /* SW tablewalk enable */
12#define SWIFT_WP       0x00400000   /* Watchpoint enable   */
13
14/* Branch folding (buggy, disable on production systems!)  */
15#define SWIFT_BF       0x00200000
16#define SWIFT_PMC      0x00180000   /* Page mode control   */
17#define SWIFT_PE       0x00040000   /* Parity enable       */
18#define SWIFT_PC       0x00020000   /* Parity control      */
19#define SWIFT_AP       0x00010000   /* Graphics page mode control (TCX/SX) */
20#define SWIFT_AC       0x00008000   /* Alternate Cacheability (see viking.h) */
21#define SWIFT_BM       0x00004000   /* Boot mode */
22#define SWIFT_RC       0x00003c00   /* DRAM refresh control */
23#define SWIFT_IE       0x00000200   /* Instruction cache enable */
24#define SWIFT_DE       0x00000100   /* Data cache enable */
25#define SWIFT_SA       0x00000080   /* Store Allocate */
26#define SWIFT_NF       0x00000002   /* No fault mode */
27#define SWIFT_EN       0x00000001   /* MMU enable */
28
29/* Bits [13:5] select one of 512 instruction cache tags */
30extern __inline__ void swift_inv_insn_tag(unsigned long addr)
31{
32	__asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
33			     "r" (addr), "i" (ASI_M_TXTC_TAG));
34}
35
36/* Bits [12:4] select one of 512 data cache tags */
37extern __inline__ void swift_inv_data_tag(unsigned long addr)
38{
39	__asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
40			     "r" (addr), "i" (ASI_M_DATAC_TAG));
41}
42
43extern __inline__ void swift_flush_dcache(void)
44{
45	unsigned long addr;
46
47	for(addr = 0; addr < 0x2000; addr += 0x10)
48		swift_inv_data_tag(addr);
49}
50
51extern __inline__ void swift_flush_icache(void)
52{
53	unsigned long addr;
54
55	for(addr = 0; addr < 0x4000; addr += 0x20)
56		swift_inv_insn_tag(addr);
57}
58
59extern __inline__ void swift_idflash_clear(void)
60{
61	unsigned long addr;
62
63	for(addr = 0; addr < 0x2000; addr += 0x10) {
64		swift_inv_insn_tag(addr<<1);
65		swift_inv_data_tag(addr);
66	}
67}
68
69/* Swift is so broken, it isn't even safe to use the following. */
70extern __inline__ void swift_flush_page(unsigned long page)
71{
72	__asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
73			     "r" (page), "i" (ASI_M_FLUSH_PAGE));
74}
75
76extern __inline__ void swift_flush_segment(unsigned long addr)
77{
78	__asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
79			     "r" (addr), "i" (ASI_M_FLUSH_SEG));
80}
81
82extern __inline__ void swift_flush_region(unsigned long addr)
83{
84	__asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
85			     "r" (addr), "i" (ASI_M_FLUSH_REGION));
86}
87
88extern __inline__ void swift_flush_context(void)
89{
90	__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t" : :
91			     "i" (ASI_M_FLUSH_CTX));
92}
93
94#endif /* !(_SPARC_SWIFT_H) */
95