| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/kd.h> |
| #include <linux/tty.h> |
| #include <linux/console.h> |
| |
| #include <asm/setup.h> |
| #include <asm/bootinfo.h> |
| #include <asm/system.h> |
| #include <asm/pgtable.h> |
| #include <asm/apollodma.h> |
| #include <asm/io.h> |
| |
| /* note only works for 16 Bit 1 page DMA's */ |
| |
| static unsigned short next_free_xlat_entry=0; |
| |
| unsigned short dma_map_page(unsigned long phys_addr,int count,int type) { |
| |
| unsigned long page_aligned_addr=phys_addr & (~((1<<12)-1)); |
| unsigned short start_map_addr=page_aligned_addr >> 10; |
| unsigned short free_xlat_entry, *xlat_map_entry; |
| int i; |
| |
| free_xlat_entry=next_free_xlat_entry; |
| for(i=0,xlat_map_entry=addr_xlat_map+(free_xlat_entry<<2);i<8;i++,xlat_map_entry++) { |
| #if 0 |
| printk("phys_addr: %x, page_aligned_addr: %x, start_map_addr: %x\n",phys_addr,page_aligned_addr,start_map_addr+i); |
| #endif |
| out_be16(xlat_map_entry, start_map_addr+i); |
| } |
| |
| next_free_xlat_entry+=2; |
| if(next_free_xlat_entry>125) |
| next_free_xlat_entry=0; |
| |
| #if 0 |
| printk("next_free_xlat_entry: %d\n",next_free_xlat_entry); |
| #endif |
| |
| return free_xlat_entry<<10; |
| } |
| |
| void dma_unmap_page(unsigned short dma_addr) { |
| |
| return ; |
| |
| } |
| |