2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1994-1996 Linus Torvalds & authors
8 * Copied from i386; many of the especially older MIPS or ISA-based platforms
9 * are basically identical. Using this file probably implies i8259 PIC
10 * support in a system but the very least interrupt numbers 0 - 15 need to
11 * be put aside for legacy devices.
13 #ifndef __ASM_MACH_GENERIC_IDE_H
14 #define __ASM_MACH_GENERIC_IDE_H
18 #include <linux/pci.h>
19 #include <linux/stddef.h>
20 #include <asm/processor.h>
23 # ifdef CONFIG_BLK_DEV_IDEPCI
30 #define IDE_ARCH_OBSOLETE_DEFAULTS
32 static __inline__ int ide_probe_legacy(void)
37 * This can be called on the ide_setup() path, super-early in
38 * boot. But the down_read() will enable local interrupts,
39 * which can cause some machines to crash. So here we detect
40 * and flag that situation and bail out early.
44 dev = pci_get_class(PCI_CLASS_BRIDGE_EISA << 8, NULL);
47 dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
54 #elif defined(CONFIG_EISA) || defined(CONFIG_ISA)
61 static __inline__ int ide_default_irq(unsigned long base)
64 case 0x1f0: return 14;
65 case 0x170: return 15;
66 case 0x1e8: return 11;
67 case 0x168: return 10;
69 case 0x160: return 12;
75 static __inline__ unsigned long ide_default_io_base(int index)
77 if (!ide_probe_legacy())
80 * If PCI is present then it is not safe to poke around
81 * the other legacy IDE ports. Only 0x1f0 and 0x170 are
82 * defined compatibility mode ports for PCI. A user can
83 * override this using ide= but we must default safe.
85 if (no_pci_devices()) {
101 #define IDE_ARCH_OBSOLETE_INIT
102 #define ide_default_io_ctl(base) ((base) + 0x206) /* obsolete */
104 #ifdef CONFIG_BLK_DEV_IDEPCI
105 #define ide_init_default_irq(base) (0)
107 #define ide_init_default_irq(base) ide_default_irq(base)
110 /* MIPS port and memory-mapped I/O string operations. */
111 static inline void __ide_flush_prologue(void)
114 if (cpu_has_dc_aliases)
119 static inline void __ide_flush_epilogue(void)
122 if (cpu_has_dc_aliases)
127 static inline void __ide_flush_dcache_range(unsigned long addr, unsigned long size)
129 if (cpu_has_dc_aliases) {
130 unsigned long end = addr + size;
133 local_flush_data_cache_page((void *)addr);
140 * insw() and gang might be called with interrupts disabled, so we can't
141 * send IPIs for flushing due to the potencial of deadlocks, see the comment
142 * above smp_call_function() in arch/mips/kernel/smp.c. We work around the
143 * problem by disabling preemption so we know we actually perform the flush
144 * on the processor that actually has the lines to be flushed which hopefully
145 * is even better for performance anyway.
147 static inline void __ide_insw(unsigned long port, void *addr,
150 __ide_flush_prologue();
151 insw(port, addr, count);
152 __ide_flush_dcache_range((unsigned long)addr, count * 2);
153 __ide_flush_epilogue();
156 static inline void __ide_insl(unsigned long port, void *addr, unsigned int count)
158 __ide_flush_prologue();
159 insl(port, addr, count);
160 __ide_flush_dcache_range((unsigned long)addr, count * 4);
161 __ide_flush_epilogue();
164 static inline void __ide_outsw(unsigned long port, const void *addr,
167 __ide_flush_prologue();
168 outsw(port, addr, count);
169 __ide_flush_dcache_range((unsigned long)addr, count * 2);
170 __ide_flush_epilogue();
173 static inline void __ide_outsl(unsigned long port, const void *addr,
176 __ide_flush_prologue();
177 outsl(port, addr, count);
178 __ide_flush_dcache_range((unsigned long)addr, count * 4);
179 __ide_flush_epilogue();
182 static inline void __ide_mm_insw(void __iomem *port, void *addr, u32 count)
184 __ide_flush_prologue();
185 readsw(port, addr, count);
186 __ide_flush_dcache_range((unsigned long)addr, count * 2);
187 __ide_flush_epilogue();
190 static inline void __ide_mm_insl(void __iomem *port, void *addr, u32 count)
192 __ide_flush_prologue();
193 readsl(port, addr, count);
194 __ide_flush_dcache_range((unsigned long)addr, count * 4);
195 __ide_flush_epilogue();
198 static inline void __ide_mm_outsw(void __iomem *port, void *addr, u32 count)
200 __ide_flush_prologue();
201 writesw(port, addr, count);
202 __ide_flush_dcache_range((unsigned long)addr, count * 2);
203 __ide_flush_epilogue();
206 static inline void __ide_mm_outsl(void __iomem * port, void *addr, u32 count)
208 __ide_flush_prologue();
209 writesl(port, addr, count);
210 __ide_flush_dcache_range((unsigned long)addr, count * 4);
211 __ide_flush_epilogue();
214 /* ide_insw calls insw, not __ide_insw. Why? */
219 #define insw(port, addr, count) __ide_insw(port, addr, count)
220 #define insl(port, addr, count) __ide_insl(port, addr, count)
221 #define outsw(port, addr, count) __ide_outsw(port, addr, count)
222 #define outsl(port, addr, count) __ide_outsl(port, addr, count)
224 #endif /* __KERNEL__ */
226 #endif /* __ASM_MACH_GENERIC_IDE_H */