[mirror_ubuntu-focal-kernel.git] / arch / alpha / include / asm / jensen.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ALPHA_JENSEN_H
#define __ALPHA_JENSEN_H

#include <asm/compiler.h>

/*
 * Defines for the AlphaPC EISA IO and memory address space.
 */

/*
 * NOTE! The memory operations do not set any memory barriers, as it's
 * not needed for cases like a frame buffer that is essentially memory-like.
 * You need to do them by hand if the operations depend on ordering.
 *
 * Similarly, the port IO operations do a "mb" only after a write operation:
 * if an mb is needed before (as in the case of doing memory mapped IO
 * first, and then a port IO operation to the same device), it needs to be
 * done by hand.
 *
 * After the above has bitten me 100 times, I'll give up and just do the
 * mb all the time, but right now I'm hoping this will work out.  Avoiding
 * mb's may potentially be a noticeable speed improvement, but I can't
 * honestly say I've tested it.
 *
 * Handling interrupts that need to do mb's to synchronize to non-interrupts
 * is another fun race area.  Don't do it (because if you do, I'll have to
 * do *everything* with interrupts disabled, ugh).
 */

/*
 * EISA Interrupt Acknowledge address
 */
#define EISA_INTA		(IDENT_ADDR + 0x100000000UL)

/*
 * FEPROM addresses
 */
#define EISA_FEPROM0		(IDENT_ADDR + 0x180000000UL)
#define EISA_FEPROM1		(IDENT_ADDR + 0x1A0000000UL)

/*
 * VL82C106 base address
 */
#define EISA_VL82C106		(IDENT_ADDR + 0x1C0000000UL)

/*
 * EISA "Host Address Extension" address (bits 25-31 of the EISA address)
 */
#define EISA_HAE		(IDENT_ADDR + 0x1D0000000UL)

/*
 * "SYSCTL" register address
 */
#define EISA_SYSCTL		(IDENT_ADDR + 0x1E0000000UL)

/*
 * "spare" register address
 */
#define EISA_SPARE		(IDENT_ADDR + 0x1F0000000UL)

/*
 * EISA memory address offset
 */
#define EISA_MEM		(IDENT_ADDR + 0x200000000UL)

/*
 * EISA IO address offset
 */
#define EISA_IO			(IDENT_ADDR + 0x300000000UL)


#ifdef __KERNEL__

#ifndef __EXTERN_INLINE
#define __EXTERN_INLINE extern inline
#define __IO_EXTERN_INLINE
#endif

/*
 * Handle the "host address register". This needs to be set
 * to the high 7 bits of the EISA address.  This is also needed
 * for EISA IO addresses, which are only 16 bits wide (the
 * hae needs to be set to 0).
 *
 * HAE isn't needed for the local IO operations, though.
 */

#define JENSEN_HAE_ADDRESS	EISA_HAE
#define JENSEN_HAE_MASK		0x1ffffff

__EXTERN_INLINE void jensen_set_hae(unsigned long addr)
{
	/* hae on the Jensen is bits 31:25 shifted right */
	addr >>= 25;
	if (addr != alpha_mv.hae_cache)
		set_hae(addr);
}

#define vuip	volatile unsigned int *

/*
 * IO functions
 *
 * The "local" functions are those that don't go out to the EISA bus,
 * but instead act on the VL82C106 chip directly.. This is mainly the
 * keyboard, RTC,  printer and first two serial lines..
 *
 * The local stuff makes for some complications, but it seems to be
 * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H
 * convinced that I need one of the newer machines.
 */

static inline unsigned int jensen_local_inb(unsigned long addr)
{
	return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
}

static inline void jensen_local_outb(u8 b, unsigned long addr)
{
	*(vuip)((addr << 9) + EISA_VL82C106) = b;
	mb();
}

static inline unsigned int jensen_bus_inb(unsigned long addr)
{
	long result;

	jensen_set_hae(0);
	result = *(volatile int *)((addr << 7) + EISA_IO + 0x00);
	return __kernel_extbl(result, addr & 3);
}

static inline void jensen_bus_outb(u8 b, unsigned long addr)
{
	jensen_set_hae(0);
	*(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
	mb();
}

/*
 * It seems gcc is not very good at optimizing away logical
 * operations that result in operations across inline functions.
 * Which is why this is a macro.
 */

#define jensen_is_local(addr) ( \
/* keyboard */	(addr == 0x60 || addr == 0x64) || \
/* RTC */	(addr == 0x170 || addr == 0x171) || \
/* mb COM2 */	(addr >= 0x2f8 && addr <= 0x2ff) || \
/* mb LPT1 */	(addr >= 0x3bc && addr <= 0x3be) || \
/* mb COM2 */	(addr >= 0x3f8 && addr <= 0x3ff))

__EXTERN_INLINE u8 jensen_inb(unsigned long addr)
{
	if (jensen_is_local(addr))
		return jensen_local_inb(addr);
	else
		return jensen_bus_inb(addr);
}

__EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
{
	if (jensen_is_local(addr))
		jensen_local_outb(b, addr);
	else
		jensen_bus_outb(b, addr);
}

__EXTERN_INLINE u16 jensen_inw(unsigned long addr)
{
	long result;

	jensen_set_hae(0);
	result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
	result >>= (addr & 3) * 8;
	return 0xffffUL & result;
}

__EXTERN_INLINE u32 jensen_inl(unsigned long addr)
{
	jensen_set_hae(0);
	return *(vuip) ((addr << 7) + EISA_IO + 0x60);
}

__EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
{
	jensen_set_hae(0);
	*(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
	mb();
}

__EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
{
	jensen_set_hae(0);
	*(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
	mb();
}

/*
 * Memory functions.
 */

__EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr)
{
	unsigned long addr = (unsigned long) xaddr;
	long result;

	jensen_set_hae(addr);
	addr &= JENSEN_HAE_MASK;
	result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00);
	result >>= (addr & 3) * 8;
	return 0xffUL & result;
}

__EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr)
{
	unsigned long addr = (unsigned long) xaddr;
	long result;

	jensen_set_hae(addr);
	addr &= JENSEN_HAE_MASK;
	result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20);
	result >>= (addr & 3) * 8;
	return 0xffffUL & result;
}

__EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr)
{
	unsigned long addr = (unsigned long) xaddr;
	jensen_set_hae(addr);
	addr &= JENSEN_HAE_MASK;
	return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
}

__EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr)
{
	unsigned long addr = (unsigned long) xaddr;
	unsigned long r0, r1;

	jensen_set_hae(addr);
	addr &= JENSEN_HAE_MASK;
	addr = (addr << 7) + EISA_MEM + 0x60;
	r0 = *(vuip) (addr);
	r1 = *(vuip) (addr + (4 << 7));
	return r1 << 32 | r0;
}

__EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr)
{
	unsigned long addr = (unsigned long) xaddr;
	jensen_set_hae(addr);
	addr &= JENSEN_HAE_MASK;
	*(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
}

__EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr)
{
	unsigned long addr = (unsigned long) xaddr;
	jensen_set_hae(addr);
	addr &= JENSEN_HAE_MASK;
	*(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
}

__EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr)
{
	unsigned long addr = (unsigned long) xaddr;
	jensen_set_hae(addr);
	addr &= JENSEN_HAE_MASK;
	*(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
}

__EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr)
{
	unsigned long addr = (unsigned long) xaddr;
	jensen_set_hae(addr);
	addr &= JENSEN_HAE_MASK;
	addr = (addr << 7) + EISA_MEM + 0x60;
	*(vuip) (addr) = b;
	*(vuip) (addr + (4 << 7)) = b >> 32;
}

__EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
{
	return (void __iomem *)addr;
}

__EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
					     unsigned long size)
{
	return (void __iomem *)(addr + 0x100000000ul);
}

__EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
{
	return (long)addr >= 0;
}

__EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
{
	return (unsigned long)addr >= 0x100000000ul;
}

/* New-style ioread interface.  All the routines are so ugly for Jensen
   that it doesn't make sense to merge them.  */

#define IOPORT(OS, NS)							\
__EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr)	\
{									\
	if (jensen_is_mmio(xaddr))					\
		return jensen_read##OS(xaddr - 0x100000000ul);		\
	else								\
		return jensen_in##OS((unsigned long)xaddr);		\
}									\
__EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr)	\
{									\
	if (jensen_is_mmio(xaddr))					\
		jensen_write##OS(b, xaddr - 0x100000000ul);		\
	else								\
		jensen_out##OS(b, (unsigned long)xaddr);		\
}

IOPORT(b, 8)
IOPORT(w, 16)
IOPORT(l, 32)

#undef IOPORT

#undef vuip

#undef __IO_PREFIX
#define __IO_PREFIX		jensen
#define jensen_trivial_rw_bw	0
#define jensen_trivial_rw_lq	0
#define jensen_trivial_io_bw	0
#define jensen_trivial_io_lq	0
#define jensen_trivial_iounmap	1
#include <asm/io_trivial.h>

#ifdef __IO_EXTERN_INLINE
#undef __EXTERN_INLINE
#undef __IO_EXTERN_INLINE
#endif

#endif /* __KERNEL__ */

#endif /* __ALPHA_JENSEN_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef __ALPHA_JENSEN_H
	3	#define __ALPHA_JENSEN_H
	4
	5	#include <asm/compiler.h>
	6
	7	/*
	8	* Defines for the AlphaPC EISA IO and memory address space.
	9	*/
	10
	11	/*
	12	* NOTE! The memory operations do not set any memory barriers, as it's
	13	* not needed for cases like a frame buffer that is essentially memory-like.
	14	* You need to do them by hand if the operations depend on ordering.
	15	*
	16	* Similarly, the port IO operations do a "mb" only after a write operation:
	17	* if an mb is needed before (as in the case of doing memory mapped IO
	18	* first, and then a port IO operation to the same device), it needs to be
	19	* done by hand.
	20	*
	21	* After the above has bitten me 100 times, I'll give up and just do the
	22	* mb all the time, but right now I'm hoping this will work out. Avoiding
	23	* mb's may potentially be a noticeable speed improvement, but I can't
	24	* honestly say I've tested it.
	25	*
	26	* Handling interrupts that need to do mb's to synchronize to non-interrupts
	27	* is another fun race area. Don't do it (because if you do, I'll have to
	28	* do everything with interrupts disabled, ugh).
	29	*/
	30
	31	/*
	32	* EISA Interrupt Acknowledge address
	33	*/
	34	#define EISA_INTA (IDENT_ADDR + 0x100000000UL)
	35
	36	/*
	37	* FEPROM addresses
	38	*/
	39	#define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL)
	40	#define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL)
	41
	42	/*
	43	* VL82C106 base address
	44	*/
	45	#define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL)
	46
	47	/*
	48	* EISA "Host Address Extension" address (bits 25-31 of the EISA address)
	49	*/
	50	#define EISA_HAE (IDENT_ADDR + 0x1D0000000UL)
	51
	52	/*
	53	* "SYSCTL" register address
	54	*/
	55	#define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL)
	56
	57	/*
	58	* "spare" register address
	59	*/
	60	#define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL)
	61
	62	/*
	63	* EISA memory address offset
	64	*/
	65	#define EISA_MEM (IDENT_ADDR + 0x200000000UL)
66
67	/*
68	* EISA IO address offset
69	*/
70	#define EISA_IO (IDENT_ADDR + 0x300000000UL)
71
72
73	#ifdef __KERNEL__
74
75	#ifndef __EXTERN_INLINE
76	#define __EXTERN_INLINE extern inline
77	#define __IO_EXTERN_INLINE
78	#endif
79
80	/*
81	* Handle the "host address register". This needs to be set
82	* to the high 7 bits of the EISA address. This is also needed
83	* for EISA IO addresses, which are only 16 bits wide (the
84	* hae needs to be set to 0).
85	*
86	* HAE isn't needed for the local IO operations, though.
87	*/
88
89	#define JENSEN_HAE_ADDRESS EISA_HAE
90	#define JENSEN_HAE_MASK 0x1ffffff
91
92	__EXTERN_INLINE void jensen_set_hae(unsigned long addr)
93	{
94	/* hae on the Jensen is bits 31:25 shifted right */
95	addr >>= 25;
96	if (addr != alpha_mv.hae_cache)
97	set_hae(addr);
98	}
99
100	#define vuip volatile unsigned int *
101
102	/*
103	* IO functions
104	*
105	* The "local" functions are those that don't go out to the EISA bus,
106	* but instead act on the VL82C106 chip directly.. This is mainly the
107	* keyboard, RTC, printer and first two serial lines..
108	*
109	* The local stuff makes for some complications, but it seems to be
110	* gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H
111	* convinced that I need one of the newer machines.
112	*/
113
114	static inline unsigned int jensen_local_inb(unsigned long addr)
115	{
116	return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
117	}
118
119	static inline void jensen_local_outb(u8 b, unsigned long addr)
120	{
121	*(vuip)((addr << 9) + EISA_VL82C106) = b;
122	mb();
123	}
124
125	static inline unsigned int jensen_bus_inb(unsigned long addr)
126	{
127	long result;
128
129	jensen_set_hae(0);
130	result = (volatile int )((addr << 7) + EISA_IO + 0x00);
131	return __kernel_extbl(result, addr & 3);
132	}
133
134	static inline void jensen_bus_outb(u8 b, unsigned long addr)
135	{
136	jensen_set_hae(0);
137	(vuip)((addr << 7) + EISA_IO + 0x00) = b 0x01010101;
138	mb();
139	}
140
141	/*
142	* It seems gcc is not very good at optimizing away logical
143	* operations that result in operations across inline functions.
144	* Which is why this is a macro.
145	*/
146
147	#define jensen_is_local(addr) ( \
148	/* keyboard */ (addr == 0x60 \|\| addr == 0x64) \|\| \
149	/* RTC */ (addr == 0x170 \|\| addr == 0x171) \|\| \
150	/* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) \|\| \
151	/* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) \|\| \
152	/* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff))
153
154	__EXTERN_INLINE u8 jensen_inb(unsigned long addr)
155	{
156	if (jensen_is_local(addr))
157	return jensen_local_inb(addr);
158	else
159	return jensen_bus_inb(addr);
160	}
161
162	__EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
163	{
164	if (jensen_is_local(addr))
165	jensen_local_outb(b, addr);
166	else
167	jensen_bus_outb(b, addr);
168	}
169
170	__EXTERN_INLINE u16 jensen_inw(unsigned long addr)
171	{
172	long result;
173
174	jensen_set_hae(0);
175	result = (volatile int ) ((addr << 7) + EISA_IO + 0x20);
176	result >>= (addr & 3) * 8;
177	return 0xffffUL & result;
178	}
179
180	__EXTERN_INLINE u32 jensen_inl(unsigned long addr)
181	{
182	jensen_set_hae(0);
183	return *(vuip) ((addr << 7) + EISA_IO + 0x60);
184	}
185
186	__EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
187	{
188	jensen_set_hae(0);
189	(vuip) ((addr << 7) + EISA_IO + 0x20) = b 0x00010001;
190	mb();
191	}
192
193	__EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
194	{
195	jensen_set_hae(0);
196	*(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
197	mb();
198	}
199
200	/*
201	* Memory functions.
202	*/
203
204	__EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr)
205	{
206	unsigned long addr = (unsigned long) xaddr;
207	long result;
208
209	jensen_set_hae(addr);
210	addr &= JENSEN_HAE_MASK;
211	result = (volatile int ) ((addr << 7) + EISA_MEM + 0x00);
212	result >>= (addr & 3) * 8;
213	return 0xffUL & result;
214	}
215
216	__EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr)
217	{
218	unsigned long addr = (unsigned long) xaddr;
219	long result;
220
221	jensen_set_hae(addr);
222	addr &= JENSEN_HAE_MASK;
223	result = (volatile int ) ((addr << 7) + EISA_MEM + 0x20);
224	result >>= (addr & 3) * 8;
225	return 0xffffUL & result;
226	}
227
228	__EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr)
229	{
230	unsigned long addr = (unsigned long) xaddr;
231	jensen_set_hae(addr);
232	addr &= JENSEN_HAE_MASK;
233	return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
234	}
235
236	__EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr)
237	{
238	unsigned long addr = (unsigned long) xaddr;
239	unsigned long r0, r1;
240
241	jensen_set_hae(addr);
242	addr &= JENSEN_HAE_MASK;
243	addr = (addr << 7) + EISA_MEM + 0x60;
244	r0 = *(vuip) (addr);
245	r1 = *(vuip) (addr + (4 << 7));
246	return r1 << 32 \| r0;
247	}
248
249	__EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr)
250	{
251	unsigned long addr = (unsigned long) xaddr;
252	jensen_set_hae(addr);
253	addr &= JENSEN_HAE_MASK;
254	(vuip) ((addr << 7) + EISA_MEM + 0x00) = b 0x01010101;
255	}
256
257	__EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr)
258	{
259	unsigned long addr = (unsigned long) xaddr;
260	jensen_set_hae(addr);
261	addr &= JENSEN_HAE_MASK;
262	(vuip) ((addr << 7) + EISA_MEM + 0x20) = b 0x00010001;
263	}
264
265	__EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr)
266	{
267	unsigned long addr = (unsigned long) xaddr;
268	jensen_set_hae(addr);
269	addr &= JENSEN_HAE_MASK;
270	*(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
271	}
272
273	__EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr)
274	{
275	unsigned long addr = (unsigned long) xaddr;
276	jensen_set_hae(addr);
277	addr &= JENSEN_HAE_MASK;
278	addr = (addr << 7) + EISA_MEM + 0x60;
279	*(vuip) (addr) = b;
280	*(vuip) (addr + (4 << 7)) = b >> 32;
281	}
282
283	__EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
284	{
285	return (void __iomem *)addr;
286	}
287
288	__EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
289	unsigned long size)
290	{
291	return (void __iomem *)(addr + 0x100000000ul);
292	}
293
294	__EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
295	{
296	return (long)addr >= 0;
297	}
298
299	__EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
300	{
301	return (unsigned long)addr >= 0x100000000ul;
302	}
303
304	/* New-style ioread interface. All the routines are so ugly for Jensen
305	that it doesn't make sense to merge them. */
306
307	#define IOPORT(OS, NS) \
308	__EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \
309	{ \
310	if (jensen_is_mmio(xaddr)) \
311	return jensen_read##OS(xaddr - 0x100000000ul); \
312	else \
313	return jensen_in##OS((unsigned long)xaddr); \
314	} \
315	__EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \
316	{ \
317	if (jensen_is_mmio(xaddr)) \
318	jensen_write##OS(b, xaddr - 0x100000000ul); \
319	else \
320	jensen_out##OS(b, (unsigned long)xaddr); \
321	}
322
323	IOPORT(b, 8)
324	IOPORT(w, 16)
325	IOPORT(l, 32)
326
327	#undef IOPORT
328
329	#undef vuip
330
331	#undef __IO_PREFIX
332	#define __IO_PREFIX jensen
333	#define jensen_trivial_rw_bw 0
334	#define jensen_trivial_rw_lq 0
335	#define jensen_trivial_io_bw 0
336	#define jensen_trivial_io_lq 0
337	#define jensen_trivial_iounmap 1
338	#include <asm/io_trivial.h>
339
340	#ifdef __IO_EXTERN_INLINE
341	#undef __EXTERN_INLINE
342	#undef __IO_EXTERN_INLINE
343	#endif
344
345	#endif /* __KERNEL__ */
346
347	#endif /* __ALPHA_JENSEN_H */