ia64/linux-2.6.18-xen.hg

view include/asm-m68k/sun3mmu.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 /*
2 * Definitions for Sun3 custom MMU.
3 */
4 #ifndef __SUN3_MMU_H__
5 #define __SUN3_MMU_H__
7 #include <asm/movs.h>
8 #include <asm/sun3-head.h>
10 /* MMU characteristics. */
11 #define SUN3_SEGMAPS_PER_CONTEXT 2048
12 #define SUN3_PMEGS_NUM 256
13 #define SUN3_CONTEXTS_NUM 8
15 #define SUN3_PMEG_SIZE_BITS 17
16 #define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS)
17 #define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1)
19 #define SUN3_PTE_SIZE_BITS 13
20 #define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS)
21 #define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1)
23 #define SUN3_CONTROL_MASK (0x0FFFFFFC)
24 #define SUN3_INVALID_PMEG 255
25 #define SUN3_INVALID_CONTEXT 255
27 #define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */
28 #define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */
29 #define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */
30 #define AC_CONTEXT 0x30000000 /* 34c current mmu-context */
31 #define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/
32 #define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */
33 #define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */
34 #define AC_SYNC_ERR 0x60000000 /* c fault type */
35 #define AC_SYNC_VA 0x60000004 /* c fault virtual address */
36 #define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */
37 #define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */
38 #define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */
39 #define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */
40 #define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */
41 #define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */
42 #define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */
43 #define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/
45 #define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
46 | SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED)
48 /* Bus access type within PTE. */
49 #define SUN3_PAGE_TYPE_MASK (0x0c000000)
50 #define SUN3_PAGE_TYPE_MEMORY (0x00000000)
51 #define SUN3_PAGE_TYPE_IO (0x04000000)
52 #define SUN3_PAGE_TYPE_VME16 (0x08000000)
53 #define SUN3_PAGE_TYPE_VME32 (0x0c000000)
55 /* Mask for page number within PTE. */
56 #define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)
58 /* Bits within bus-error register. */
59 #define SUN3_BUSERR_WATCHDOG (0x01)
60 #define SUN3_BUSERR_unused (0x02)
61 #define SUN3_BUSERR_FPAENERR (0x04)
62 #define SUN3_BUSERR_FPABERR (0x08)
63 #define SUN3_BUSERR_VMEBERR (0x10)
64 #define SUN3_BUSERR_TIMEOUT (0x20)
65 #define SUN3_BUSERR_PROTERR (0x40)
66 #define SUN3_BUSERR_INVALID (0x80)
68 #ifndef __ASSEMBLY__
70 /* Read bus error status register (implicitly clearing it). */
71 static inline unsigned char sun3_get_buserr(void)
72 {
73 unsigned char sfc, c;
75 GET_SFC (sfc);
76 SET_SFC (FC_CONTROL);
77 GET_CONTROL_BYTE (AC_BUS_ERROR, c);
78 SET_SFC (sfc);
80 return c;
81 }
83 /* Read segmap from hardware MMU. */
84 static inline unsigned long sun3_get_segmap(unsigned long addr)
85 {
86 register unsigned long entry;
87 unsigned char c, sfc;
89 GET_SFC (sfc);
90 SET_SFC (FC_CONTROL);
91 GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c);
92 SET_SFC (sfc);
93 entry = c;
95 return entry;
96 }
98 /* Write segmap to hardware MMU. */
99 static inline void sun3_put_segmap(unsigned long addr, unsigned long entry)
100 {
101 unsigned char sfc;
103 GET_DFC (sfc);
104 SET_DFC (FC_CONTROL);
105 SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry);
106 SET_DFC (sfc);
108 return;
109 }
111 /* Read PTE from hardware MMU. */
112 static inline unsigned long sun3_get_pte(unsigned long addr)
113 {
114 register unsigned long entry;
115 unsigned char sfc;
117 GET_SFC (sfc);
118 SET_SFC (FC_CONTROL);
119 GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
120 SET_SFC (sfc);
122 return entry;
123 }
125 /* Write PTE to hardware MMU. */
126 static inline void sun3_put_pte(unsigned long addr, unsigned long entry)
127 {
128 unsigned char sfc;
130 GET_DFC (sfc);
131 SET_DFC (FC_CONTROL);
132 SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
133 SET_DFC (sfc);
135 return;
136 }
138 /* get current context */
139 static inline unsigned char sun3_get_context(void)
140 {
141 unsigned char sfc, c;
143 GET_SFC(sfc);
144 SET_SFC(FC_CONTROL);
145 GET_CONTROL_BYTE(AC_CONTEXT, c);
146 SET_SFC(sfc);
148 return c;
149 }
151 /* set alternate context */
152 static inline void sun3_put_context(unsigned char c)
153 {
154 unsigned char dfc;
155 GET_DFC(dfc);
156 SET_DFC(FC_CONTROL);
157 SET_CONTROL_BYTE(AC_CONTEXT, c);
158 SET_DFC(dfc);
160 return;
161 }
163 extern void *sun3_ioremap(unsigned long phys, unsigned long size,
164 unsigned long type);
166 extern int sun3_map_test(unsigned long addr, char *val);
168 #endif /* !__ASSEMBLY__ */
170 #endif /* !__SUN3_MMU_H__ */