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1#ifndef __ALPHA_SYSTEM_H
2#define __ALPHA_SYSTEM_H
3
4#include <asm/pal.h>
5#include <asm/page.h>
6#include <asm/barrier.h>
7
8/*
9 * System defines.. Note that this is included both from .c and .S
10 * files, so it does only defines, not any C code.
11 */
12
13/*
14 * We leave one page for the initial stack page, and one page for
15 * the initial process structure. Also, the console eats 3 MB for
16 * the initial bootloader (one of which we can reclaim later).
17 */
18#define BOOT_PCB 0x20000000
19#define BOOT_ADDR 0x20000000
20/* Remove when official MILO sources have ELF support: */
21#define BOOT_SIZE (16*1024)
22
23#ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
24#define KERNEL_START_PHYS 0x300000 /* Old bootloaders hardcoded this. */
25#else
26#define KERNEL_START_PHYS 0x1000000 /* required: Wildfire/Titan/Marvel */
27#endif
28
29#define KERNEL_START (PAGE_OFFSET+KERNEL_START_PHYS)
30#define SWAPPER_PGD KERNEL_START
31#define INIT_STACK (PAGE_OFFSET+KERNEL_START_PHYS+0x02000)
32#define EMPTY_PGT (PAGE_OFFSET+KERNEL_START_PHYS+0x04000)
33#define EMPTY_PGE (PAGE_OFFSET+KERNEL_START_PHYS+0x08000)
34#define ZERO_PGE (PAGE_OFFSET+KERNEL_START_PHYS+0x0A000)
35
36#define START_ADDR (PAGE_OFFSET+KERNEL_START_PHYS+0x10000)
37
38/*
39 * This is setup by the secondary bootstrap loader. Because
40 * the zero page is zeroed out as soon as the vm system is
41 * initialized, we need to copy things out into a more permanent
42 * place.
43 */
44#define PARAM ZERO_PGE
45#define COMMAND_LINE ((char*)(PARAM + 0x0000))
46#define INITRD_START (*(unsigned long *) (PARAM+0x100))
47#define INITRD_SIZE (*(unsigned long *) (PARAM+0x108))
48
49#ifndef __ASSEMBLY__
50#include <linux/kernel.h>
51#define AT_VECTOR_SIZE_ARCH 4 /* entries in ARCH_DLINFO */
52
53/*
54 * This is the logout header that should be common to all platforms
55 * (assuming they are running OSF/1 PALcode, I guess).
56 */
57struct el_common {
58 unsigned int size; /* size in bytes of logout area */
59 unsigned int sbz1 : 30; /* should be zero */
60 unsigned int err2 : 1; /* second error */
61 unsigned int retry : 1; /* retry flag */
62 unsigned int proc_offset; /* processor-specific offset */
63 unsigned int sys_offset; /* system-specific offset */
64 unsigned int code; /* machine check code */
65 unsigned int frame_rev; /* frame revision */
66};
67
68/* Machine Check Frame for uncorrectable errors (Large format)
69 * --- This is used to log uncorrectable errors such as
70 * double bit ECC errors.
71 * --- These errors are detected by both processor and systems.
72 */
73struct el_common_EV5_uncorrectable_mcheck {
74 unsigned long shadow[8]; /* Shadow reg. 8-14, 25 */
75 unsigned long paltemp[24]; /* PAL TEMP REGS. */
76 unsigned long exc_addr; /* Address of excepting instruction*/
77 unsigned long exc_sum; /* Summary of arithmetic traps. */
78 unsigned long exc_mask; /* Exception mask (from exc_sum). */
79 unsigned long pal_base; /* Base address for PALcode. */
80 unsigned long isr; /* Interrupt Status Reg. */
81 unsigned long icsr; /* CURRENT SETUP OF EV5 IBOX */
82 unsigned long ic_perr_stat; /* I-CACHE Reg. <11> set Data parity
83 <12> set TAG parity*/
84 unsigned long dc_perr_stat; /* D-CACHE error Reg. Bits set to 1:
85 <2> Data error in bank 0
86 <3> Data error in bank 1
87 <4> Tag error in bank 0
88 <5> Tag error in bank 1 */
89 unsigned long va; /* Effective VA of fault or miss. */
90 unsigned long mm_stat; /* Holds the reason for D-stream
91 fault or D-cache parity errors */
92 unsigned long sc_addr; /* Address that was being accessed
93 when EV5 detected Secondary cache
94 failure. */
95 unsigned long sc_stat; /* Helps determine if the error was
96 TAG/Data parity(Secondary Cache)*/
97 unsigned long bc_tag_addr; /* Contents of EV5 BC_TAG_ADDR */
98 unsigned long ei_addr; /* Physical address of any transfer
99 that is logged in EV5 EI_STAT */
100 unsigned long fill_syndrome; /* For correcting ECC errors. */
101 unsigned long ei_stat; /* Helps identify reason of any
102 processor uncorrectable error
103 at its external interface. */
104 unsigned long ld_lock; /* Contents of EV5 LD_LOCK register*/
105};
106
107struct el_common_EV6_mcheck {
108 unsigned int FrameSize; /* Bytes, including this field */
109 unsigned int FrameFlags; /* <31> = Retry, <30> = Second Error */
110 unsigned int CpuOffset; /* Offset to CPU-specific info */
111 unsigned int SystemOffset; /* Offset to system-specific info */
112 unsigned int MCHK_Code;
113 unsigned int MCHK_Frame_Rev;
114 unsigned long I_STAT; /* EV6 Internal Processor Registers */
115 unsigned long DC_STAT; /* (See the 21264 Spec) */
116 unsigned long C_ADDR;
117 unsigned long DC1_SYNDROME;
118 unsigned long DC0_SYNDROME;
119 unsigned long C_STAT;
120 unsigned long C_STS;
121 unsigned long MM_STAT;
122 unsigned long EXC_ADDR;
123 unsigned long IER_CM;
124 unsigned long ISUM;
125 unsigned long RESERVED0;
126 unsigned long PAL_BASE;
127 unsigned long I_CTL;
128 unsigned long PCTX;
129};
130
131extern void halt(void) __attribute__((noreturn));
132#define __halt() __asm__ __volatile__ ("call_pal %0 #halt" : : "i" (PAL_halt))
133
134#define switch_to(P,N,L) \
135 do { \
136 (L) = alpha_switch_to(virt_to_phys(&task_thread_info(N)->pcb), (P)); \
137 check_mmu_context(); \
138 } while (0)
139
140struct task_struct;
141extern struct task_struct *alpha_switch_to(unsigned long, struct task_struct*);
142
143#define imb() \
144__asm__ __volatile__ ("call_pal %0 #imb" : : "i" (PAL_imb) : "memory")
145
146#define draina() \
147__asm__ __volatile__ ("call_pal %0 #draina" : : "i" (PAL_draina) : "memory")
148
149enum implver_enum {
150 IMPLVER_EV4,
151 IMPLVER_EV5,
152 IMPLVER_EV6
153};
154
155#ifdef CONFIG_ALPHA_GENERIC
156#define implver() \
157({ unsigned long __implver; \
158 __asm__ ("implver %0" : "=r"(__implver)); \
159 (enum implver_enum) __implver; })
160#else
161/* Try to eliminate some dead code. */
162#ifdef CONFIG_ALPHA_EV4
163#define implver() IMPLVER_EV4
164#endif
165#ifdef CONFIG_ALPHA_EV5
166#define implver() IMPLVER_EV5
167#endif
168#if defined(CONFIG_ALPHA_EV6)
169#define implver() IMPLVER_EV6
170#endif
171#endif
172
173enum amask_enum {
174 AMASK_BWX = (1UL << 0),
175 AMASK_FIX = (1UL << 1),
176 AMASK_CIX = (1UL << 2),
177 AMASK_MAX = (1UL << 8),
178 AMASK_PRECISE_TRAP = (1UL << 9),
179};
180
181#define amask(mask) \
182({ unsigned long __amask, __input = (mask); \
183 __asm__ ("amask %1,%0" : "=r"(__amask) : "rI"(__input)); \
184 __amask; })
185
186#define __CALL_PAL_R0(NAME, TYPE) \
187extern inline TYPE NAME(void) \
188{ \
189 register TYPE __r0 __asm__("$0"); \
190 __asm__ __volatile__( \
191 "call_pal %1 # " #NAME \
192 :"=r" (__r0) \
193 :"i" (PAL_ ## NAME) \
194 :"$1", "$16", "$22", "$23", "$24", "$25"); \
195 return __r0; \
196}
197
198#define __CALL_PAL_W1(NAME, TYPE0) \
199extern inline void NAME(TYPE0 arg0) \
200{ \
201 register TYPE0 __r16 __asm__("$16") = arg0; \
202 __asm__ __volatile__( \
203 "call_pal %1 # "#NAME \
204 : "=r"(__r16) \
205 : "i"(PAL_ ## NAME), "0"(__r16) \
206 : "$1", "$22", "$23", "$24", "$25"); \
207}
208
209#define __CALL_PAL_W2(NAME, TYPE0, TYPE1) \
210extern inline void NAME(TYPE0 arg0, TYPE1 arg1) \
211{ \
212 register TYPE0 __r16 __asm__("$16") = arg0; \
213 register TYPE1 __r17 __asm__("$17") = arg1; \
214 __asm__ __volatile__( \
215 "call_pal %2 # "#NAME \
216 : "=r"(__r16), "=r"(__r17) \
217 : "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17) \
218 : "$1", "$22", "$23", "$24", "$25"); \
219}
220
221#define __CALL_PAL_RW1(NAME, RTYPE, TYPE0) \
222extern inline RTYPE NAME(TYPE0 arg0) \
223{ \
224 register RTYPE __r0 __asm__("$0"); \
225 register TYPE0 __r16 __asm__("$16") = arg0; \
226 __asm__ __volatile__( \
227 "call_pal %2 # "#NAME \
228 : "=r"(__r16), "=r"(__r0) \
229 : "i"(PAL_ ## NAME), "0"(__r16) \
230 : "$1", "$22", "$23", "$24", "$25"); \
231 return __r0; \
232}
233
234#define __CALL_PAL_RW2(NAME, RTYPE, TYPE0, TYPE1) \
235extern inline RTYPE NAME(TYPE0 arg0, TYPE1 arg1) \
236{ \
237 register RTYPE __r0 __asm__("$0"); \
238 register TYPE0 __r16 __asm__("$16") = arg0; \
239 register TYPE1 __r17 __asm__("$17") = arg1; \
240 __asm__ __volatile__( \
241 "call_pal %3 # "#NAME \
242 : "=r"(__r16), "=r"(__r17), "=r"(__r0) \
243 : "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17) \
244 : "$1", "$22", "$23", "$24", "$25"); \
245 return __r0; \
246}
247
248__CALL_PAL_W1(cflush, unsigned long);
249__CALL_PAL_R0(rdmces, unsigned long);
250__CALL_PAL_R0(rdps, unsigned long);
251__CALL_PAL_R0(rdusp, unsigned long);
252__CALL_PAL_RW1(swpipl, unsigned long, unsigned long);
253__CALL_PAL_R0(whami, unsigned long);
254__CALL_PAL_W2(wrent, void*, unsigned long);
255__CALL_PAL_W1(wripir, unsigned long);
256__CALL_PAL_W1(wrkgp, unsigned long);
257__CALL_PAL_W1(wrmces, unsigned long);
258__CALL_PAL_RW2(wrperfmon, unsigned long, unsigned long, unsigned long);
259__CALL_PAL_W1(wrusp, unsigned long);
260__CALL_PAL_W1(wrvptptr, unsigned long);
261
262/*
263 * TB routines..
264 */
265#define __tbi(nr,arg,arg1...) \
266({ \
267 register unsigned long __r16 __asm__("$16") = (nr); \
268 register unsigned long __r17 __asm__("$17"); arg; \
269 __asm__ __volatile__( \
270 "call_pal %3 #__tbi" \
271 :"=r" (__r16),"=r" (__r17) \
272 :"0" (__r16),"i" (PAL_tbi) ,##arg1 \
273 :"$0", "$1", "$22", "$23", "$24", "$25"); \
274})
275
276#define tbi(x,y) __tbi(x,__r17=(y),"1" (__r17))
277#define tbisi(x) __tbi(1,__r17=(x),"1" (__r17))
278#define tbisd(x) __tbi(2,__r17=(x),"1" (__r17))
279#define tbis(x) __tbi(3,__r17=(x),"1" (__r17))
280#define tbiap() __tbi(-1, /* no second argument */)
281#define tbia() __tbi(-2, /* no second argument */)
282
283/*
284 * Atomic exchange routines.
285 */
286
287#define __ASM__MB
288#define ____xchg(type, args...) __xchg ## type ## _local(args)
289#define ____cmpxchg(type, args...) __cmpxchg ## type ## _local(args)
290#include <asm/xchg.h>
291
292#define xchg_local(ptr,x) \
293 ({ \
294 __typeof__(*(ptr)) _x_ = (x); \
295 (__typeof__(*(ptr))) __xchg_local((ptr), (unsigned long)_x_, \
296 sizeof(*(ptr))); \
297 })
298
299#define cmpxchg_local(ptr, o, n) \
300 ({ \
301 __typeof__(*(ptr)) _o_ = (o); \
302 __typeof__(*(ptr)) _n_ = (n); \
303 (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \
304 (unsigned long)_n_, \
305 sizeof(*(ptr))); \
306 })
307
308#define cmpxchg64_local(ptr, o, n) \
309 ({ \
310 BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
311 cmpxchg_local((ptr), (o), (n)); \
312 })
313
314#ifdef CONFIG_SMP
315#undef __ASM__MB
316#define __ASM__MB "\tmb\n"
317#endif
318#undef ____xchg
319#undef ____cmpxchg
320#define ____xchg(type, args...) __xchg ##type(args)
321#define ____cmpxchg(type, args...) __cmpxchg ##type(args)
322#include <asm/xchg.h>
323
324#define xchg(ptr,x) \
325 ({ \
326 __typeof__(*(ptr)) _x_ = (x); \
327 (__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, \
328 sizeof(*(ptr))); \
329 })
330
331#define cmpxchg(ptr, o, n) \
332 ({ \
333 __typeof__(*(ptr)) _o_ = (o); \
334 __typeof__(*(ptr)) _n_ = (n); \
335 (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \
336 (unsigned long)_n_, sizeof(*(ptr)));\
337 })
338
339#define cmpxchg64(ptr, o, n) \
340 ({ \
341 BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
342 cmpxchg((ptr), (o), (n)); \
343 })
344
345#undef __ASM__MB
346#undef ____cmpxchg
347
348#define __HAVE_ARCH_CMPXCHG 1
349
350#endif /* __ASSEMBLY__ */
351
352#define arch_align_stack(x) (x)
353
354#endif