ia64/linux-2.6.18-xen.hg

view arch/m68k/apollo/dma.c @ 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 #include <linux/types.h>
2 #include <linux/kernel.h>
3 #include <linux/mm.h>
4 #include <linux/kd.h>
5 #include <linux/tty.h>
6 #include <linux/console.h>
8 #include <asm/setup.h>
9 #include <asm/bootinfo.h>
10 #include <asm/system.h>
11 #include <asm/pgtable.h>
12 #include <asm/apollodma.h>
13 #include <asm/io.h>
15 /* note only works for 16 Bit 1 page DMA's */
17 static unsigned short next_free_xlat_entry=0;
19 unsigned short dma_map_page(unsigned long phys_addr,int count,int type) {
21 unsigned long page_aligned_addr=phys_addr & (~((1<<12)-1));
22 unsigned short start_map_addr=page_aligned_addr >> 10;
23 unsigned short free_xlat_entry, *xlat_map_entry;
24 int i;
26 free_xlat_entry=next_free_xlat_entry;
27 for(i=0,xlat_map_entry=addr_xlat_map+(free_xlat_entry<<2);i<8;i++,xlat_map_entry++) {
28 #if 0
29 printk("phys_addr: %x, page_aligned_addr: %x, start_map_addr: %x\n",phys_addr,page_aligned_addr,start_map_addr+i);
30 #endif
31 out_be16(xlat_map_entry, start_map_addr+i);
32 }
34 next_free_xlat_entry+=2;
35 if(next_free_xlat_entry>125)
36 next_free_xlat_entry=0;
38 #if 0
39 printk("next_free_xlat_entry: %d\n",next_free_xlat_entry);
40 #endif
42 return free_xlat_entry<<10;
43 }
45 void dma_unmap_page(unsigned short dma_addr) {
47 return ;
49 }