ia64/linux-2.6.18-xen.hg

view include/asm-m68k/floppy.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 * Implementation independent bits of the Floppy driver.
3 *
4 * much of this file is derived from what was originally the Q40 floppy driver.
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 *
10 * Copyright (C) 1999, 2000, 2001
11 *
12 * Sun3x support added 2/4/2000 Sam Creasey (sammy@sammy.net)
13 *
14 */
16 #include <asm/io.h>
18 #include <linux/vmalloc.h>
20 asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id,
21 struct pt_regs *regs);
23 /* constants... */
25 #undef MAX_DMA_ADDRESS
26 #define MAX_DMA_ADDRESS 0x00 /* nothing like that */
29 /*
30 * Again, the CMOS information doesn't work on m68k..
31 */
32 #define FLOPPY0_TYPE (MACH_IS_Q40 ? 6 : 4)
33 #define FLOPPY1_TYPE 0
35 #define FLOPPY_MOTOR_MASK 0xf0
38 /* basically PC init + set use_virtual_dma */
39 #define FDC1 m68k_floppy_init()
41 #define N_FDC 1
42 #define N_DRIVE 8
45 /* vdma globals adapted from asm-i386/floppy.h */
47 static int virtual_dma_count=0;
48 static int virtual_dma_residue=0;
49 static char *virtual_dma_addr=NULL;
50 static int virtual_dma_mode=0;
51 static int doing_pdma=0;
53 #include <asm/sun3xflop.h>
55 extern spinlock_t dma_spin_lock;
57 static __inline__ unsigned long claim_dma_lock(void)
58 {
59 unsigned long flags;
60 spin_lock_irqsave(&dma_spin_lock, flags);
61 return flags;
62 }
64 static __inline__ void release_dma_lock(unsigned long flags)
65 {
66 spin_unlock_irqrestore(&dma_spin_lock, flags);
67 }
70 static __inline__ unsigned char fd_inb(int port)
71 {
72 if(MACH_IS_Q40)
73 return inb_p(port);
74 else if(MACH_IS_SUN3X)
75 return sun3x_82072_fd_inb(port);
76 return 0;
77 }
79 static __inline__ void fd_outb(unsigned char value, int port)
80 {
81 if(MACH_IS_Q40)
82 outb_p(value, port);
83 else if(MACH_IS_SUN3X)
84 sun3x_82072_fd_outb(value, port);
85 }
88 static int fd_request_irq(void)
89 {
90 if(MACH_IS_Q40)
91 return request_irq(FLOPPY_IRQ, floppy_hardint,
92 IRQF_DISABLED, "floppy", floppy_hardint);
93 else if(MACH_IS_SUN3X)
94 return sun3xflop_request_irq();
95 return -ENXIO;
96 }
98 static void fd_free_irq(void)
99 {
100 if(MACH_IS_Q40)
101 free_irq(FLOPPY_IRQ, floppy_hardint);
102 }
104 #define fd_request_dma() vdma_request_dma(FLOPPY_DMA,"floppy")
105 #define fd_get_dma_residue() vdma_get_dma_residue(FLOPPY_DMA)
106 #define fd_dma_mem_alloc(size) vdma_mem_alloc(size)
107 #define fd_dma_setup(addr, size, mode, io) vdma_dma_setup(addr, size, mode, io)
109 #define fd_enable_irq() /* nothing... */
110 #define fd_disable_irq() /* nothing... */
112 #define fd_free_dma() /* nothing */
114 /* No 64k boundary crossing problems on Q40 - no DMA at all */
115 #define CROSS_64KB(a,s) (0)
117 #define DMA_MODE_READ 0x44 /* i386 look-alike */
118 #define DMA_MODE_WRITE 0x48
121 static int m68k_floppy_init(void)
122 {
123 use_virtual_dma =1;
124 can_use_virtual_dma = 1;
127 if (MACH_IS_Q40)
128 return 0x3f0;
129 else if(MACH_IS_SUN3X)
130 return sun3xflop_init();
131 else
132 return -1;
133 }
136 static int vdma_request_dma(unsigned int dmanr, const char * device_id)
137 {
138 return 0;
139 }
142 static int vdma_get_dma_residue(unsigned int dummy)
143 {
144 return virtual_dma_count + virtual_dma_residue;
145 }
148 static unsigned long vdma_mem_alloc(unsigned long size)
149 {
150 return (unsigned long) vmalloc(size);
152 }
154 static void _fd_dma_mem_free(unsigned long addr, unsigned long size)
155 {
156 vfree((void *)addr);
157 }
158 #define fd_dma_mem_free(addr,size) _fd_dma_mem_free(addr, size)
161 /* choose_dma_mode ???*/
163 static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
164 {
165 doing_pdma = 1;
166 virtual_dma_port = (MACH_IS_Q40 ? io : 0);
167 virtual_dma_mode = (mode == DMA_MODE_WRITE);
168 virtual_dma_addr = addr;
169 virtual_dma_count = size;
170 virtual_dma_residue = 0;
171 return 0;
172 }
176 static void fd_disable_dma(void)
177 {
178 doing_pdma = 0;
179 virtual_dma_residue += virtual_dma_count;
180 virtual_dma_count=0;
181 }
185 /* this is the only truly Q40 specific function */
187 asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id,
188 struct pt_regs *regs)
189 {
190 register unsigned char st;
192 #undef TRACE_FLPY_INT
193 #define NO_FLOPPY_ASSEMBLER
195 #ifdef TRACE_FLPY_INT
196 static int calls=0;
197 static int bytes=0;
198 static int dma_wait=0;
199 #endif
200 if(!doing_pdma) {
201 floppy_interrupt(irq, dev_id, regs);
202 return IRQ_HANDLED;
203 }
205 #ifdef TRACE_FLPY_INT
206 if(!calls)
207 bytes = virtual_dma_count;
208 #endif
210 {
211 register int lcount;
212 register char *lptr;
214 /* serve 1st byte fast: */
216 st=1;
217 for(lcount=virtual_dma_count, lptr=virtual_dma_addr;
218 lcount; lcount--, lptr++) {
219 st=inb(virtual_dma_port+4) & 0xa0 ;
220 if(st != 0xa0)
221 break;
222 if(virtual_dma_mode)
223 outb_p(*lptr, virtual_dma_port+5);
224 else
225 *lptr = inb_p(virtual_dma_port+5);
226 }
228 virtual_dma_count = lcount;
229 virtual_dma_addr = lptr;
230 st = inb(virtual_dma_port+4);
231 }
233 #ifdef TRACE_FLPY_INT
234 calls++;
235 #endif
236 if(st == 0x20)
237 return IRQ_HANDLED;
238 if(!(st & 0x20)) {
239 virtual_dma_residue += virtual_dma_count;
240 virtual_dma_count=0;
241 #ifdef TRACE_FLPY_INT
242 printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n",
243 virtual_dma_count, virtual_dma_residue, calls, bytes,
244 dma_wait);
245 calls = 0;
246 dma_wait=0;
247 #endif
248 doing_pdma = 0;
249 floppy_interrupt(irq, dev_id, regs);
250 return IRQ_HANDLED;
251 }
252 #ifdef TRACE_FLPY_INT
253 if(!virtual_dma_count)
254 dma_wait++;
255 #endif
256 return IRQ_HANDLED;
257 }
259 #define EXTRA_FLOPPY_PARAMS