1 #ifndef __ALPHA_LCA__H__
2 #define __ALPHA_LCA__H__
3
4 #include <asm/system.h>
5 #include <asm/compiler.h>
6
7 /*
8 * Low Cost Alpha (LCA) definitions (these apply to 21066 and 21068,
9 * for example).
10 *
11 * This file is based on:
12 *
13 * DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors
14 * Hardware Reference Manual; Digital Equipment Corp.; May 1994;
15 * Maynard, MA; Order Number: EC-N2681-71.
16 */
17
18 /*
19 * NOTE: The LCA uses a Host Address Extension (HAE) register to access
20 * PCI addresses that are beyond the first 27 bits of address
21 * space. Updating the HAE requires an external cycle (and
22 * a memory barrier), which tends to be slow. Instead of updating
23 * it on each sparse memory access, we keep the current HAE value
24 * cached in variable cache_hae. Only if the cached HAE differs
25 * from the desired HAE value do we actually updated HAE register.
26 * The HAE register is preserved by the interrupt handler entry/exit
27 * code, so this scheme works even in the presence of interrupts.
28 *
29 * Dense memory space doesn't require the HAE, but is restricted to
30 * aligned 32 and 64 bit accesses. Special Cycle and Interrupt
31 * Acknowledge cycles may also require the use of the HAE. The LCA
32 * limits I/O address space to the bottom 24 bits of address space,
33 * but this easily covers the 16 bit ISA I/O address space.
34 */
35
36 /*
37 * NOTE 2! The memory operations do not set any memory barriers, as
38 * it's not needed for cases like a frame buffer that is essentially
39 * memory-like. You need to do them by hand if the operations depend
40 * on ordering.
41 *
42 * Similarly, the port I/O operations do a "mb" only after a write
43 * operation: if an mb is needed before (as in the case of doing
44 * memory mapped I/O first, and then a port I/O operation to the same
45 * device), it needs to be done by hand.
46 *
47 * After the above has bitten me 100 times, I'll give up and just do
48 * the mb all the time, but right now I'm hoping this will work out.
49 * Avoiding mb's may potentially be a noticeable speed improvement,
50 * but I can't honestly say I've tested it.
51 *
52 * Handling interrupts that need to do mb's to synchronize to
53 * non-interrupts is another fun race area. Don't do it (because if
54 * you do, I'll have to do *everything* with interrupts disabled,
55 * ugh).
56 */
57
58 /*
59 * Memory Controller registers:
60 */
61 #define LCA_MEM_BCR0 (IDENT_ADDR + 0x120000000UL)
62 #define LCA_MEM_BCR1 (IDENT_ADDR + 0x120000008UL)
63 #define LCA_MEM_BCR2 (IDENT_ADDR + 0x120000010UL)
64 #define LCA_MEM_BCR3 (IDENT_ADDR + 0x120000018UL)
65 #define LCA_MEM_BMR0 (IDENT_ADDR + 0x120000020UL)
66 #define LCA_MEM_BMR1 (IDENT_ADDR + 0x120000028UL)
67 #define LCA_MEM_BMR2 (IDENT_ADDR + 0x120000030UL)
68 #define LCA_MEM_BMR3 (IDENT_ADDR + 0x120000038UL)
69 #define LCA_MEM_BTR0 (IDENT_ADDR + 0x120000040UL)
70 #define LCA_MEM_BTR1 (IDENT_ADDR + 0x120000048UL)
71 #define LCA_MEM_BTR2 (IDENT_ADDR + 0x120000050UL)
72 #define LCA_MEM_BTR3 (IDENT_ADDR + 0x120000058UL)
73 #define LCA_MEM_GTR (IDENT_ADDR + 0x120000060UL)
74 #define LCA_MEM_ESR (IDENT_ADDR + 0x120000068UL)
75 #define LCA_MEM_EAR (IDENT_ADDR + 0x120000070UL)
76 #define LCA_MEM_CAR (IDENT_ADDR + 0x120000078UL)
77 #define LCA_MEM_VGR (IDENT_ADDR + 0x120000080UL)
78 #define LCA_MEM_PLM (IDENT_ADDR + 0x120000088UL)
79 #define LCA_MEM_FOR (IDENT_ADDR + 0x120000090UL)
80
81 /*
82 * I/O Controller registers:
83 */
84 #define LCA_IOC_HAE (IDENT_ADDR + 0x180000000UL)
85 #define LCA_IOC_CONF (IDENT_ADDR + 0x180000020UL)
86 #define LCA_IOC_STAT0 (IDENT_ADDR + 0x180000040UL)
87 #define LCA_IOC_STAT1 (IDENT_ADDR + 0x180000060UL)
88 #define LCA_IOC_TBIA (IDENT_ADDR + 0x180000080UL)
89 #define LCA_IOC_TB_ENA (IDENT_ADDR + 0x1800000a0UL)
90 #define LCA_IOC_SFT_RST (IDENT_ADDR + 0x1800000c0UL)
91 #define LCA_IOC_PAR_DIS (IDENT_ADDR + 0x1800000e0UL)
92 #define LCA_IOC_W_BASE0 (IDENT_ADDR + 0x180000100UL)
93 #define LCA_IOC_W_BASE1 (IDENT_ADDR + 0x180000120UL)
94 #define LCA_IOC_W_MASK0 (IDENT_ADDR + 0x180000140UL)
95 #define LCA_IOC_W_MASK1 (IDENT_ADDR + 0x180000160UL)
96 #define LCA_IOC_T_BASE0 (IDENT_ADDR + 0x180000180UL)
97 #define LCA_IOC_T_BASE1 (IDENT_ADDR + 0x1800001a0UL)
98 #define LCA_IOC_TB_TAG0 (IDENT_ADDR + 0x188000000UL)
99 #define LCA_IOC_TB_TAG1 (IDENT_ADDR + 0x188000020UL)
100 #define LCA_IOC_TB_TAG2 (IDENT_ADDR + 0x188000040UL)
101 #define LCA_IOC_TB_TAG3 (IDENT_ADDR + 0x188000060UL)
102 #define LCA_IOC_TB_TAG4 (IDENT_ADDR + 0x188000070UL)
103 #define LCA_IOC_TB_TAG5 (IDENT_ADDR + 0x1880000a0UL)
104 #define LCA_IOC_TB_TAG6 (IDENT_ADDR + 0x1880000c0UL)
105 #define LCA_IOC_TB_TAG7 (IDENT_ADDR + 0x1880000e0UL)
106
107 /*
108 * Memory spaces:
109 */
110 #define LCA_IACK_SC (IDENT_ADDR + 0x1a0000000UL)
111 #define LCA_CONF (IDENT_ADDR + 0x1e0000000UL)
112 #define LCA_IO (IDENT_ADDR + 0x1c0000000UL)
113 #define LCA_SPARSE_MEM (IDENT_ADDR + 0x200000000UL)
114 #define LCA_DENSE_MEM (IDENT_ADDR + 0x300000000UL)
115
116 /*
117 * Bit definitions for I/O Controller status register 0:
118 */
119 #define LCA_IOC_STAT0_CMD 0xf
120 #define LCA_IOC_STAT0_ERR (1<<4)
121 #define LCA_IOC_STAT0_LOST (1<<5)
122 #define LCA_IOC_STAT0_THIT (1<<6)
123 #define LCA_IOC_STAT0_TREF (1<<7)
124 #define LCA_IOC_STAT0_CODE_SHIFT 8
125 #define LCA_IOC_STAT0_CODE_MASK 0x7
126 #define LCA_IOC_STAT0_P_NBR_SHIFT 13
127 #define LCA_IOC_STAT0_P_NBR_MASK 0x7ffff
128
129 #define LCA_HAE_ADDRESS LCA_IOC_HAE
130
131 /* LCA PMR Power Management register defines */
132 #define LCA_PMR_ADDR (IDENT_ADDR + 0x120000098UL)
133 #define LCA_PMR_PDIV 0x7 /* Primary clock divisor */
134 #define LCA_PMR_ODIV 0x38 /* Override clock divisor */
135 #define LCA_PMR_INTO 0x40 /* Interrupt override */
136 #define LCA_PMR_DMAO 0x80 /* DMA override */
137 #define LCA_PMR_OCCEB 0xffff0000L /* Override cycle counter - even bits */
138 #define LCA_PMR_OCCOB 0xffff000000000000L /* Override cycle counter - even bits */
139 #define LCA_PMR_PRIMARY_MASK 0xfffffffffffffff8L
140
141 /* LCA PMR Macros */
142
143 #define LCA_READ_PMR (*(volatile unsigned long *)LCA_PMR_ADDR)
144 #define LCA_WRITE_PMR(d) (*((volatile unsigned long *)LCA_PMR_ADDR) = (d))
145
146 #define LCA_GET_PRIMARY(r) ((r) & LCA_PMR_PDIV)
147 #define LCA_GET_OVERRIDE(r) (((r) >> 3) & LCA_PMR_PDIV)
148 #define LCA_SET_PRIMARY_CLOCK(r, c) ((r) = (((r) & LCA_PMR_PRIMARY_MASK)|(c)))
149
150 /* LCA PMR Divisor values */
151 #define LCA_PMR_DIV_1 0x0
152 #define LCA_PMR_DIV_1_5 0x1
153 #define LCA_PMR_DIV_2 0x2
154 #define LCA_PMR_DIV_4 0x3
155 #define LCA_PMR_DIV_8 0x4
156 #define LCA_PMR_DIV_16 0x5
157 #define LCA_PMR_DIV_MIN DIV_1
158 #define LCA_PMR_DIV_MAX DIV_16
159
160
161 /*
162 * Data structure for handling LCA machine checks. Correctable errors
163 * result in a short logout frame, uncorrectable ones in a long one.
164 */
165 struct el_lca_mcheck_short {
166 struct el_common h; /* common logout header */
167 unsigned long esr; /* error-status register */
168 unsigned long ear; /* error-address register */
169 unsigned long dc_stat; /* dcache status register */
170 unsigned long ioc_stat0; /* I/O controller status register 0 */
171 unsigned long ioc_stat1; /* I/O controller status register 1 */
172 };
173
174 struct el_lca_mcheck_long {
175 struct el_common h; /* common logout header */
176 unsigned long pt[31]; /* PAL temps */
177 unsigned long exc_addr; /* exception address */
178 unsigned long pad1[3];
179 unsigned long pal_base; /* PALcode base address */
180 unsigned long hier; /* hw interrupt enable */
181 unsigned long hirr; /* hw interrupt request */
182 unsigned long mm_csr; /* MMU control & status */
183 unsigned long dc_stat; /* data cache status */
184 unsigned long dc_addr; /* data cache addr register */
185 unsigned long abox_ctl; /* address box control register */
186 unsigned long esr; /* error status register */
187 unsigned long ear; /* error address register */
188 unsigned long car; /* cache control register */
189 unsigned long ioc_stat0; /* I/O controller status register 0 */
190 unsigned long ioc_stat1; /* I/O controller status register 1 */
191 unsigned long va; /* virtual address register */
192 };
193
194 union el_lca {
195 struct el_common * c;
196 struct el_lca_mcheck_long * l;
197 struct el_lca_mcheck_short * s;
198 };
199
200 #ifdef __KERNEL__
201
202 #ifndef __EXTERN_INLINE
203 #define __EXTERN_INLINE extern inline
204 #define __IO_EXTERN_INLINE
205 #endif
206
207 /*
208 * I/O functions:
209 *
210 * Unlike Jensen, the Noname machines have no concept of local
211 * I/O---everything goes over the PCI bus.
212 *
213 * There is plenty room for optimization here. In particular,
214 * the Alpha's insb/insw/extb/extw should be useful in moving
215 * data to/from the right byte-lanes.
216 */
217
218 #define vip volatile int __force *
219 #define vuip volatile unsigned int __force *
220 #define vulp volatile unsigned long __force *
221
222 #define LCA_SET_HAE \
223 do { \
224 if (addr >= (1UL << 24)) { \
225 unsigned long msb = addr & 0xf8000000; \
226 addr -= msb; \
227 set_hae(msb); \
228 } \
229 } while (0)
230
231
lca_ioread8(void __iomem * xaddr)232 __EXTERN_INLINE unsigned int lca_ioread8(void __iomem *xaddr)
233 {
234 unsigned long addr = (unsigned long) xaddr;
235 unsigned long result, base_and_type;
236
237 if (addr >= LCA_DENSE_MEM) {
238 addr -= LCA_DENSE_MEM;
239 LCA_SET_HAE;
240 base_and_type = LCA_SPARSE_MEM + 0x00;
241 } else {
242 addr -= LCA_IO;
243 base_and_type = LCA_IO + 0x00;
244 }
245
246 result = *(vip) ((addr << 5) + base_and_type);
247 return __kernel_extbl(result, addr & 3);
248 }
249
lca_iowrite8(u8 b,void __iomem * xaddr)250 __EXTERN_INLINE void lca_iowrite8(u8 b, void __iomem *xaddr)
251 {
252 unsigned long addr = (unsigned long) xaddr;
253 unsigned long w, base_and_type;
254
255 if (addr >= LCA_DENSE_MEM) {
256 addr -= LCA_DENSE_MEM;
257 LCA_SET_HAE;
258 base_and_type = LCA_SPARSE_MEM + 0x00;
259 } else {
260 addr -= LCA_IO;
261 base_and_type = LCA_IO + 0x00;
262 }
263
264 w = __kernel_insbl(b, addr & 3);
265 *(vuip) ((addr << 5) + base_and_type) = w;
266 }
267
lca_ioread16(void __iomem * xaddr)268 __EXTERN_INLINE unsigned int lca_ioread16(void __iomem *xaddr)
269 {
270 unsigned long addr = (unsigned long) xaddr;
271 unsigned long result, base_and_type;
272
273 if (addr >= LCA_DENSE_MEM) {
274 addr -= LCA_DENSE_MEM;
275 LCA_SET_HAE;
276 base_and_type = LCA_SPARSE_MEM + 0x08;
277 } else {
278 addr -= LCA_IO;
279 base_and_type = LCA_IO + 0x08;
280 }
281
282 result = *(vip) ((addr << 5) + base_and_type);
283 return __kernel_extwl(result, addr & 3);
284 }
285
lca_iowrite16(u16 b,void __iomem * xaddr)286 __EXTERN_INLINE void lca_iowrite16(u16 b, void __iomem *xaddr)
287 {
288 unsigned long addr = (unsigned long) xaddr;
289 unsigned long w, base_and_type;
290
291 if (addr >= LCA_DENSE_MEM) {
292 addr -= LCA_DENSE_MEM;
293 LCA_SET_HAE;
294 base_and_type = LCA_SPARSE_MEM + 0x08;
295 } else {
296 addr -= LCA_IO;
297 base_and_type = LCA_IO + 0x08;
298 }
299
300 w = __kernel_inswl(b, addr & 3);
301 *(vuip) ((addr << 5) + base_and_type) = w;
302 }
303
lca_ioread32(void __iomem * xaddr)304 __EXTERN_INLINE unsigned int lca_ioread32(void __iomem *xaddr)
305 {
306 unsigned long addr = (unsigned long) xaddr;
307 if (addr < LCA_DENSE_MEM)
308 addr = ((addr - LCA_IO) << 5) + LCA_IO + 0x18;
309 return *(vuip)addr;
310 }
311
lca_iowrite32(u32 b,void __iomem * xaddr)312 __EXTERN_INLINE void lca_iowrite32(u32 b, void __iomem *xaddr)
313 {
314 unsigned long addr = (unsigned long) xaddr;
315 if (addr < LCA_DENSE_MEM)
316 addr = ((addr - LCA_IO) << 5) + LCA_IO + 0x18;
317 *(vuip)addr = b;
318 }
319
lca_ioportmap(unsigned long addr)320 __EXTERN_INLINE void __iomem *lca_ioportmap(unsigned long addr)
321 {
322 return (void __iomem *)(addr + LCA_IO);
323 }
324
lca_ioremap(unsigned long addr,unsigned long size)325 __EXTERN_INLINE void __iomem *lca_ioremap(unsigned long addr,
326 unsigned long size)
327 {
328 return (void __iomem *)(addr + LCA_DENSE_MEM);
329 }
330
lca_is_ioaddr(unsigned long addr)331 __EXTERN_INLINE int lca_is_ioaddr(unsigned long addr)
332 {
333 return addr >= IDENT_ADDR + 0x120000000UL;
334 }
335
lca_is_mmio(const volatile void __iomem * addr)336 __EXTERN_INLINE int lca_is_mmio(const volatile void __iomem *addr)
337 {
338 return (unsigned long)addr >= LCA_DENSE_MEM;
339 }
340
341 #undef vip
342 #undef vuip
343 #undef vulp
344
345 #undef __IO_PREFIX
346 #define __IO_PREFIX lca
347 #define lca_trivial_rw_bw 2
348 #define lca_trivial_rw_lq 1
349 #define lca_trivial_io_bw 0
350 #define lca_trivial_io_lq 0
351 #define lca_trivial_iounmap 1
352 #include <asm/io_trivial.h>
353
354 #ifdef __IO_EXTERN_INLINE
355 #undef __EXTERN_INLINE
356 #undef __IO_EXTERN_INLINE
357 #endif
358
359 #endif /* __KERNEL__ */
360
361 #endif /* __ALPHA_LCA__H__ */
362